diff --git a/.gitignore b/.gitignore index 8aebcd57..74c05caa 100644 --- a/.gitignore +++ b/.gitignore @@ -1,4 +1,5 @@ # built application files +*.apk *.ap_ # files for the dex VM @@ -10,18 +11,34 @@ # generated files bin/ gen/ -lint.xml build/ +# Gradle files +.gradle/ +subProjects/facebook/build + +# Buck files +buck-out/ +.buckd/ + +# Intellij project files +.idea/ +.idea/libraries +.idea/.name +.idea/compiler.xml +.idea/gradle.xml +.idea/modules.xml +.idea/runConfigurations.xml +.idea/vcs.xml +.idea/workspace.xml +.idea/misc.xml +gen-external-apklibs/ +*.iml +*.iws + # Local configuration file (sdk path, etc) local.properties -# Eclipse project files -.classpath -.project -.settings -.checkstyle - # Mac-specific stuff .DS_Store @@ -33,12 +50,4 @@ pom.xml.* #Ant build.xml ant.properties -local.properties - -# Gradle -.gradle - -# Intellij project files -.idea -.idea/workspace.xml -gen-external-apklibs/ \ No newline at end of file +profiles_settings.xml diff --git a/.idea/codeStyleSettings.xml b/.idea/codeStyleSettings.xml new file mode 100644 index 00000000..3682ebc2 --- /dev/null +++ b/.idea/codeStyleSettings.xml @@ -0,0 +1,236 @@ + + + + + + \ No newline at end of file diff --git a/Android-RxJava.iml b/Android-RxJava.iml deleted file mode 100644 index 55503402..00000000 --- a/Android-RxJava.iml +++ /dev/null @@ -1,21 +0,0 @@ - - - - - - - - - - - - - - - - - - - - diff --git a/README.md b/README.md index 7861d98a..0f796a1a 100644 --- a/README.md +++ b/README.md @@ -1,48 +1,212 @@ Learning RxJava for Android by example ============== -This is a repository with real-world useful examples of using RxJava with Android. [It usually will be in a constant state of "Work in Progress" (WIP)](http://nerds.weddingpartyapp.com/tech/2014/09/15/learning-rxjava-with-android-by-example/). +This is a repository with real-world useful examples of using RxJava with Android. [It usually will be in a constant state of "Work in Progress" (WIP)](https://kau.sh/blog/learning-rxjava-with-android-by-example/). -## Examples: +I've also been giving talks about Learning Rx using many of the examples listed in this repo. + +* [Learning RxJava For Android by Example : Part 1](https://www.youtube.com/watch?v=k3D0cWyNno4) \[[slides](https://speakerdeck.com/kaushikgopal/learning-rxjava-for-android-by-example)\] (SF Android Meetup 2015) +* [Learning Rx by Example : Part 2](https://vimeo.com/190922794) \[[slides](https://speakerdeck.com/kaushikgopal/learning-rx-by-example-2)\] (Øredev 2016) -### Concurrency using schedulers +## Examples: -A common requirement is to offload lengthy heavy I/O intensive operations to a background thread (non-UI thread), and feed the results back to the UI/main thread, on completion. This is a demo of how long running operations can be offloaded to a background thread. After the operation is done, we resume back on the main thread. All using RxJava! Think of this as a replacement to AsyncTasks. +1. [Background work & concurrency (using Schedulers)](#1-background-work--concurrency-using-schedulers) +2. [Accumulate calls (using buffer)](#2-accumulate-calls-using-buffer) +3. [Instant/Auto searching text listeners (using Subjects & debounce)](#3-instantauto-searching-text-listeners-using-subjects--debounce) +4. [Networking with Retrofit & RxJava (using zip, flatmap)](#4-networking-with-retrofit--rxjava-using-zip-flatmap) +5. [Two-way data binding for TextViews (using PublishSubject)](#5-two-way-data-binding-for-textviews-using-publishsubject) +6. [Simple and Advanced polling (using interval and repeatWhen)](#6-simple-and-advanced-polling-using-interval-and-repeatwhen) +7. [Simple and Advanced exponential backoff (using delay and retryWhen)](#7-simple-and-advanced-exponential-backoff-using-delay-and-retrywhen) +8. [Form validation (using combineLatest)](#8-form-validation-using-combinelatest) +9. [Pseudo caching : retrieve data first from a cache, then a network call (using concat, concatEager, merge or publish)](#9-pseudo-caching--retrieve-data-first-from-a-cache-then-a-network-call-using-concat-concateager-merge-or-publish) +10. [Simple timing demos (using timer, interval or delay)](#10-simple-timing-demos-using-timer-interval-and-delay) +11. [RxBus : event bus using RxJava (using RxRelay (never terminating Subjects) and debouncedBuffer)](#11-rxbus--event-bus-using-rxjava-using-rxrelay-never-terminating-subjects-and-debouncedbuffer) +12. [Persist data on Activity rotations (using Subjects and retained Fragments)](#12-persist-data-on-activity-rotations-using-subjects-and-retained-fragments) +13. [Networking with Volley](#13-networking-with-volley) +14. [Pagination with Rx (using Subjects)](#14-pagination-with-rx-using-subjects) +15. [Orchestrating Observable: make parallel network calls, then combine the result into a single data point (using flatmap & zip)](#15-orchestrating-observable-make-parallel-network-calls-then-combine-the-result-into-a-single-data-point-using-flatmap--zip) +16. [Simple Timeout example (using timeout)](#16-simple-timeout-example-using-timeout) +17. [Setup and teardown resources (using `using`)](#17-setup-and-teardown-resources-using-using) +18. [Multicast playground](#18-multicast-playground) + +## Description + +### 1. Background work & concurrency (using Schedulers) + +A common requirement is to offload lengthy heavy I/O intensive operations to a background thread (non-UI thread) and feed the results back to the UI/main thread, on completion. This is a demo of how long-running operations can be offloaded to a background thread. After the operation is done, we resume back on the main thread. All using RxJava! Think of this as a replacement to AsyncTasks. The long operation is simulated by a blocking Thread.sleep call (since this is done in a background thread, our UI is never interrupted). -To really see this example shine. Hit the button multiple times and see how the button click (which is a ui operation) is never blocked because the long operation only runs in the background. +To really see this example shine. Hit the button multiple times and see how the button click (which is a UI operation) is never blocked because the long operation only runs in the background. -### Accumulate calls (buffer) +### 2. Accumulate calls (using buffer) This is a demo of how events can be accumulated using the "buffer" operation. A button is provided and we accumulate the number of clicks on that button, over a span of time and then spit out the final results. -If you hit the button once. you'll get message saying the button was hit once. If you hit it 5 times continuosly within a span of 2 seconds, then you get a single log, saying you hit that button 5 times (vs 5 individual logs saying "Button hit once"). +If you hit the button once, you'll get a message saying the button was hit once. If you hit it 5 times continuously within a span of 2 seconds, then you get a single log, saying you hit that button 5 times (vs 5 individual logs saying "Button hit once"). -Two possible implementations: +Note: -2a. Using a traditional observable - but encompassing the OnClick within the observable (as demoed here) -2b. Using PublishSubject and sending single clicks to the Observable, which in-turn then sends it to the Observer +If you're looking for a more foolproof solution that accumulates "continuous" taps vs just the number of taps within a time span, look at the [EventBus Demo](https://github.com/kaushikgopal/Android-RxJava/blob/master/app/src/main/java/com/morihacky/android/rxjava/rxbus/RxBusDemo_Bottom3Fragment.java) where a combo of the `publish` and `buffer` operators is used. For a more detailed explanation, you can also have a look at this [blog post](https://kau.sh/blog/debouncedbuffer-with-rxjava/). -### Instant/Auto searching (subject + debounce) +### 3. Instant/Auto searching text listeners (using Subjects & debounce) -This is a demo of how events can be swallowed in a way that only the last one is respected. A typical example of this is instant search result boxes. As you type the word "Bruce Lee", you don't want to execute searches for B, Br, Bru, Bruce, Bruce , Bruce L ... etc. But rather intelligently wait for a couple of moments, make sure the user has finished typing the whole word, and then shoot out a single call for "Bruce Lee". +This is a demo of how events can be swallowed in a way that only the last one is respected. A typical example of this is instant search result boxes. As you type the word "Bruce Lee", you don't want to execute searches for B, Br, Bru, Bruce, Bruce, Bruce L ... etc. But rather intelligently wait for a couple of moments, make sure the user has finished typing the whole word, and then shoot out a single call for "Bruce Lee". As you type in the input box, it will not shoot out log messages at every single input character change, but rather only pick the lastly emitted event (i.e. input) and log that. This is the debounce/throttleWithTimeout method in RxJava. -### Retrofit and RxJava (zip, flatmap) +### 4. Networking with Retrofit & RxJava (using zip, flatmap) + +[Retrofit from Square](http://square.github.io/retrofit/) is an amazing library that helps with easy networking (even if you haven't made the jump to RxJava just yet, you really should check it out). It works even better with RxJava and these are examples hitting the GitHub API, taken straight up from the android demigod-developer Jake Wharton's talk at Netflix. You can [watch the talk](https://www.youtube.com/watch?v=aEuNBk1b5OE#t=2480) at this link. Incidentally, my motivation to use RxJava was from attending this talk at Netflix. + +(Note: you're most likely to hit the GitHub API quota pretty fast so send in an OAuth-token as a parameter if you want to keep running these examples often). + +### 5. Two-way data binding for TextViews (using PublishSubject) + +Auto-updating views are a pretty cool thing. If you've dealt with Angular JS before, they have a pretty nifty concept called "two-way data binding", so when an HTML element is bound to a model/entity object, it constantly "listens" to changes on that entity and auto-updates its state based on the model. Using the technique in this example, you could potentially use a pattern like the [Presentation View Model pattern](http://martinfowler.com/eaaDev/PresentationModel.html) with great ease. + +While the example here is pretty rudimentary, the technique used to achieve the double binding using a `Publish Subject` is much more interesting. + +### 6. Simple and Advanced polling (using interval and repeatWhen) + +This is an example of polling using RxJava Schedulers. This is useful in cases, where you want to constantly poll a server and possibly get new data. The network call is "simulated" so it forces a delay before return a resultant string. + +There are two variants for this: + +1. Simple Polling: say when you want to execute a certain task every 5 seconds +2. Increasing Delayed Polling: say when you want to execute a task first in 1 second, then in 2 seconds, then 3 and so on. + +The second example is basically a variant of [Exponential Backoff](https://github.com/kaushikgopal/RxJava-Android-Samples#exponential-backoff). + +Instead of using a RetryWithDelay, we use a RepeatWithDelay here. To understand the difference between Retry(When) and Repeat(When) I wouuld suggest Dan's [fantastic post on the subject](http://blog.danlew.net/2016/01/25/rxjavas-repeatwhen-and-retrywhen-explained/). + +An alternative approach to delayed polling without the use of `repeatWhen` would be using chained nested delay observables. See [startExecutingWithExponentialBackoffDelay in the ExponentialBackOffFragment example](https://github.com/kaushikgopal/RxJava-Android-Samples/blob/master/app/src/main/java/com/morihacky/android/rxjava/fragments/ExponentialBackoffFragment.java#L111). + +### 7. Simple and Advanced exponential backoff (using delay and retryWhen) + +[Exponential backoff](https://en.wikipedia.org/wiki/Exponential_backoff) is a strategy where based on feedback from a certain output, we alter the rate of a process (usually reducing the number of retries or increasing the wait time before retrying or re-executing a certain process). + +The concept makes more sense with examples. RxJava makes it (relatively) simple to implement such a strategy. My thanks to [Mike](https://twitter.com/m_evans10) for suggesting the idea. + +#### Retry (if error) with exponential backoff + +Say you have a network failure. A sensible strategy would be to NOT keep retrying your network call every 1 second. It would be smart instead (nay... elegant!) to retry with increasing delays. So you try at second 1 to execute the network call, no dice? try after 10 seconds... negatory? try after 20 seconds, no cookie? try after 1 minute. If this thing is still failing, you got to give up on the network yo! + +We simulate this behaviour using RxJava with the [`retryWhen` operator](http://reactivex.io/documentation/operators/retry.html). + +`RetryWithDelay` code snippet courtesy: + +* http://stackoverflow.com/a/25292833/159825 +* Another excellent implementation via @[sddamico](https://github.com/sddamico) : https://gist.github.com/sddamico/c45d7cdabc41e663bea1 +* This one includes support for jittering, by @[leandrofavarin](https://github.com/leandrofavarin) : http://leandrofavarin.com/exponential-backoff-rxjava-operator-with-jitter + +Also look at the [Polling example](https://github.com/kaushikgopal/RxJava-Android-Samples#polling-with-schedulers) where we use a very similar Exponential backoff mechanism. + +#### "Repeat" with exponential backoff + +Another variant of the exponential backoff strategy is to execute an operation for a given number of times but with delayed intervals. So you execute a certain operation 1 second from now, then you execute it again 10 seconds from now, then you execute the operation 20 seconds from now. After a grand total of 3 times you stop executing. + +Simulating this behavior is actually way more simpler than the prevoius retry mechanism. You can use a variant of the `delay` operator to achieve this. + + +### 8. Form validation (using [`.combineLatest`](http://reactivex.io/documentation/operators/combinelatest.html)) + +Thanks to Dan Lew for giving me this idea in the [fragmented podcast - episode #4](http://fragmentedpodcast.com/episodes/4/) (around the 4:30 mark). + +`.combineLatest` allows you to monitor the state of multiple observables at once compactly at a single location. The example demonstrated shows how you can use `.combineLatest` to validate a basic form. There are 3 primary inputs for this form to be considered "valid" (an email, a password and a number). The form will turn valid (the text below turns blue :P) once all the inputs are valid. If they are not, an error is shown against the invalid inputs. + +We have 3 independent observables that track the text/input changes for each of the form fields (RxAndroid's `WidgetObservable` comes in handy to monitor the text changes). After an event change is noticed from **all** 3 inputs, the result is "combined" and the form is evaluated for validity. + +Note that the `Func3` function that checks for validity, kicks in only after ALL 3 inputs have received a text change event. + +The value of this technique becomes more apparent when you have more number of input fields in a form. Handling it otherwise with a bunch of booleans makes the code cluttered and kind of difficult to follow. But using `.combineLatest` all that logic is concentrated in a nice compact block of code (I still use booleans but that was to make the example more readable). + + +### 9. Pseudo caching : retrieve data first from a cache, then a network call (using concat, concatEager, merge or publish) + +We have two source Observables: a disk (fast) cache and a network (fresh) call. Typically the disk Observable is much faster than the network Observable. But in order to demonstrate the working, we've also used a fake "slower" disk cache just to see how the operators behave. + +This is demonstrated using 4 techniques: -[Retrofit from Square](http://square.github.io/retrofit/) is an amazing library that helps with easy networking (even if you haven't made the jump to RxJava just yet, you really should check it out). It works even better with RxJava and these are examples hitting the github api, taken straight up from the android demigod-developer Jake Wharton's talk at Netflix. You can [watch the talk](https://www.youtube.com/watch?v=aEuNBk1b5OE#t=2480) at this link. Incidentally, my motiviation to use RxJava was from attending this talk at Netflix. +1. [`.concat`](http://reactivex.io/documentation/operators/concat.html) +2. [`.concatEager`](http://reactivex.io/RxJava/javadoc/rx/Observable.html#concatEager(java.lang.Iterable)) +3. [`.merge`](http://reactivex.io/documentation/operators/merge.html) +4. [`.publish`](http://reactivex.io/RxJava/javadoc/rx/Observable.html#publish(rx.functions.Func1)) selector + merge + takeUntil -Since it was a presentation, Jake only put up the most important code snippets in [his slides](https://speakerdeck.com/jakewharton/2014-1). Also he uses Java 8 in them, so I flushed those examples out in ~~good~~ old Java 6. (Note: you're most likely to hit the github api quota pretty fast so send in an oauth-token as a parameter if you want to keep running these examples often). +The 4th technique is probably what you want to use eventually but it's interesting to go through the progression of techniques, to understand why. -### Orchestrating Observables. Make parallel network calls, then combine the result into a single data point (flatmap + zip) +`concat` is great. It retrieves information from the first Observable (disk cache in our case) and then the subsequent network Observable. Since the disk cache is presumably faster, all appears well and the disk cache is loaded up fast, and once the network call finishes we swap out the "fresh" results. -The below ascii diagram expresses the intention of our next example with panache. f1,f2,3,f4,f5 are essentially network calls that when made, give back a result that's needed for a future calculation. +The problem with `concat` is that the subsequent observable doesn't even start until the first Observable completes. That can be a problem. We want all observables to start simultaneously but produce the results in a way we expect. Thankfully RxJava introduced `concatEager` which does exactly that. It starts both observables but buffers the result from the latter one until the former Observable finishes. This is a completely viable option. + +Sometimes though, you just want to start showing the results immediately. Assuming the first observable (for some strange reason) takes really long to run through all its items, even if the first few items from the second observable have come down the wire it will forcibly be queued. You don't necessarily want to "wait" on any Observable. In these situations, we could use the `merge` operator. It interleaves items as they are emitted. This works great and starts to spit out the results as soon as they're shown. + +Similar to the `concat` operator, if your first Observable is always faster than the second Observable you won't run into any problems. However the problem with `merge` is: if for some strange reason an item is emitted by the cache or slower observable *after* the newer/fresher observable, it will overwrite the newer content. Click the "MERGE (SLOWER DISK)" button in the example to see this problem in action. @JakeWharton and @swankjesse contributions go to 0! In the real world this could be bad, as it would mean the fresh data would get overridden by stale disk data. + +To solve this problem you can use merge in combination with the super nifty `publish` operator which takes in a "selector". I wrote about this usage in a [blog post](https://kau.sh/blog/rxjava-tip-for-the-day-share-publish-refcount-and-all-that-jazz/) but I have [Jedi JW](https://twitter.com/JakeWharton/status/786363146990649345) to thank for reminding of this technique. We `publish` the network observable and provide it a selector which starts emitting from the disk cache, up until the point that the network observable starts emitting. Once the network observable starts emitting, it ignores all results from the disk observable. This is perfect and handles any problems we might have. + +Previously, I was using the `merge` operator but overcoming the problem of results being overwritten by monitoring the "resultAge". See the old `PseudoCacheMergeFragment` example if you're curious to see this old implementation. + +### 10. Simple timing demos (using timer, interval and delay) + +This is a super simple and straightforward example which shows you how to use RxJava's `timer`, `interval` and `delay` operators to handle a bunch of cases where you want to run a task at specific intervals. Basically say NO to Android `TimerTask`s. + +Cases demonstrated here: + +1. run a single task after a delay of 2s, then complete +2. run a task constantly every 1s (there's a delay of 1s before the first task fires off) +3. run a task constantly every 1s (same as above but there's no delay before the first task fires off) +4. run a task constantly every 3s, but after running it 5 times, terminate automatically +5. run a task A, pause for sometime, then execute Task B, then terminate + +### 11. RxBus : event bus using RxJava (using RxRelay (never terminating Subjects) and debouncedBuffer) + +There are accompanying blog posts that do a much better job of explaining the details on this demo: + +1. [Implementing an event bus with RxJava](https://kau.sh/blog/implementing-an-event-bus-with-rxjava-rxbus/) +2. [DebouncedBuffer used for the fancier variant of the demo](https://kau.sh/blog/debouncedbuffer-with-rxjava/) +3. [share/publish/refcount](https://kau.sh/blog/rxjava-tip-for-the-day-share-publish-refcount-and-all-that-jazz/) + +### 12. Persist data on Activity rotations (using Subjects and retained Fragments) + +A common question that's asked when using RxJava in Android is, "how do i resume the work of an observable if a configuration change occurs (activity rotation, language locale change etc.)?". + +This example shows you one strategy viz. using retained Fragments. I started using retained fragments as "worker fragments" after reading this [fantastic post by Alex Lockwood](http://www.androiddesignpatterns.com/2013/04/retaining-objects-across-config-changes.html) quite sometime back. + +Hit the start button and rotate the screen to your heart's content; you'll see the observable continue from where it left off. + +*There are certain quirks about the "hotness" of the source observable used in this example. Check [my blog post](https://kau.sh/blog/a-note-about-the-warmth-share-operator/) out where I explain the specifics.* + +I have since rewritten this example using an alternative approach. While the [`ConnectedObservable` approach worked](https://github.com/kaushikgopal/RxJava-Android-Samples/blob/master/app/src/main/java/com/morihacky/android/rxjava/fragments/RotationPersist1WorkerFragment.java#L20) it enters the lands of "multicasting" which can be tricky (thread-safety, .refcount etc.). Subjects on the other hand are far more simple. You can see it rewritten [using a `Subject` here](https://github.com/kaushikgopal/RxJava-Android-Samples/blob/master/app/src/main/java/com/morihacky/android/rxjava/fragments/RotationPersist2WorkerFragment.java#L22). + +I wrote [another blog post](https://tech.instacart.com/how-to-think-about-subjects-part-1/) on how to think about Subjects where I go into some specifics. + + +### 13. Networking with Volley + +[Volley](http://developer.android.com/training/volley/index.html) is another networking library introduced by [Google at IO '13](https://www.youtube.com/watch?v=yhv8l9F44qo). A kind citizen of github contributed this example so we know how to integrate Volley with RxJava. + +### 14. Pagination with Rx (using Subjects) + +I leverage the simple use of a Subject here. Honestly, if you don't have your items coming down via an `Observable` already (like through Retrofit or a network request), there's no good reason to use Rx and complicate things. + +This example basically sends the page number to a Subject, and the subject handles adding the items. Notice the use of `concatMap` and the return of an `Observable` from `_itemsFromNetworkCall`. + +For kicks, I've also included a `PaginationAutoFragment` example, this "auto-paginates" without us requiring to hit a button. It should be simple to follow if you got how the previous example works. + +Here are some other fancy implementations (while i enjoyed reading them, i didn't land up using them for my real world app cause personally i don't think it's necessary): + +* [Matthias example of an Rx based pager](https://gist.github.com/mttkay/24881a0ce986f6ec4b4d) +* [Eugene's very comprehensive Pagination sample](https://github.com/matzuk/PaginationSample) +* [Recursive Paging example](http://stackoverflow.com/questions/28047272/handle-paging-with-rxjava) + +### 15. Orchestrating Observable: make parallel network calls, then combine the result into a single data point (using flatmap & zip) + +The below ascii diagram expresses the intention of our next example with panache. f1,f2,f3,f4,f5 are essentially network calls that when made, give back a result that's needed for a future calculation. (flatmap) @@ -54,37 +218,34 @@ The below ascii diagram expresses the intention of our next example with panache The code for this example has already been written by one Mr.skehlet in the interwebs. Head over to [the gist](https://gist.github.com/skehlet/9418379) for the code. It's written in pure Java (6) so it's pretty comprehensible if you've understood the previous examples. I'll flush it out here again when time permits or I've run out of other compelling examples. -### Double binding with TextViews +### 16. Simple Timeout example (using timeout) -Auto-updating views are a pretty cool thing. If you've dealt with Angular JS before, they have a pretty nifty concept called "two way data binding", where when an HTML element is bound to a model/entity object, it constantly "listens" to changes on that entity and auto-updates its state based on the model. Using the technique in this example, you could potentially use a pattern like the [Presentation View Model pattern](http://martinfowler.com/eaaDev/PresentationModel.html) with great ease. +This is a simple example demonstrating the use of the `.timeout` operator. Button 1 will complete the task before the timeout constraint, while Button 2 will force a timeout error. -While the example here is pretty rudimentary, the technique used to achieve the double binding using a `Publish Subject` is much more interesting. +Notice how we can provide a custom Observable that indicates how to react under a timeout Exception. -### Polling with Schedulers +### 17. Setup and teardown resources (using `using`) -This is an example of polling using RxJava Schedulers. This is useful in cases, where you want to constantly poll a server and possibly get new data. The network call is "simulated" so it forces a delay before return a resultant string. - -### RxBus - An event bus using RxJava + DebouncedBuffer +The [operator `using`](http://reactivex.io/documentation/operators/using.html) is relatively less known and notoriously hard to Google. It's a beautiful API that helps to setup a (costly) resource, use it and then dispose off in a clean way. -Have a look at the accompanying blog posts for details on this demo: +The nice thing about this operator is that it provides a mechansim to use potentially costly resources in a tightly scoped manner. using -> setup, use and dispose. Think DB connections (like Realm instances), socket connections, thread locks etc. -1. [Implementing an event bus with RxJava](http://nerds.weddingpartyapp.com/tech/2014/12/24/implementing-an-event-bus-with-rxjava-rxbus/) -2. [DebouncedBuffer used for the fancier variant of the demo](http://nerds.weddingpartyapp.com/tech/2014/12/24/secret-bonus-part-debouncedbuffer-used-in-rxbus-example/) -3. [share/publish/refcount](http://nerds.weddingpartyapp.com/tech/2014/12/24/rxjava-share-publish-refcount-and-all-that-jazz/) +### 18. Multicast Playground +Multicasting in Rx is like a dark art. Not too many folks know how to pull it off without concern. This example condiers two subscribers (in the forms of buttons) and allows you to add/remove subscribers at different points of time and see how the different operators behave under those circumstances. -## Work in Progress: +The source observale is a timer (`interval`) observable and the reason this was chosen was to intentionally pick a non-terminating observable, so you can test/confirm if your multicast experiment will leak. -Examples that I would like to have here, but haven't found the time yet to flush out. +_I also gave a talk about [Multicasting in detail at 360|Andev](https://speakerdeck.com/kaushikgopal/rx-by-example-volume-3-the-multicast-edition). If you have the inclination and time, I highly suggest watching that talk first (specifically the Multicast operator permutation segment) and then messing around with the example here._ -### First retrieve from cached data, if no cache found make a network call if you can't find your data (concat) (wip) -[Courtesy: gist](https://gist.github.com/adelnizamutdinov/7483969) +## Rx 2.x -### Pagination (wip) +All the examples here have been migrated to use RxJava 2.X. -a. Simple pagination -b. Optimized pagination +* Have a look at [PR #83 to see the diff of changes between RxJava 1 and 2](https://github.com/kaushikgopal/RxJava-Android-Samples/pull/83/files) +* [What's different in Rx 2.x](https://github.com/ReactiveX/RxJava/wiki/What's-different-in-2.0) +We use [David Karnok's Interop library](https://github.com/akarnokd/RxJava2Interop) in some cases as certain libraries like RxBindings, RxRelays, RxJava-Math etc. have not been ported yet to 2.x. ## Contributing: @@ -92,6 +253,18 @@ I try to ensure the examples are not overly contrived but reflect a real-world u I'm wrapping my head around RxJava too so if you feel there's a better way of doing one of the examples mentioned above, open up an issue explaining how. Even better, send a pull request. + +## Sponsorship (Memory Management/Profiling) + +Rx threading is messy business. To help, this project uses YourKit tools for analysis. + +![Yourkit](https://www.yourkit.com/images/yklogo.png) + + +YourKit supports open source projects with innovative and intelligent tools +for monitoring and profiling Java applications. YourKit is the creator of YourKit Java Profiler. + + ## License Licensed under the Apache License, Version 2.0 (the "License"). @@ -105,4 +278,4 @@ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the specific language governing permissions and limitations under the License. -You agree that all contributions to this repository, in the form of fixes, pull-requests, new examples etc. follow the above mentioned license. \ No newline at end of file +You agree that all contributions to this repository, in the form of fixes, pull-requests, new examples etc. follow the above-mentioned license. diff --git a/app/app.iml b/app/app.iml deleted file mode 100644 index 53174074..00000000 --- a/app/app.iml +++ /dev/null @@ -1,101 +0,0 @@ - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - diff --git a/app/build.gradle b/app/build.gradle index 79f8a4ca..edbcd31c 100644 --- a/app/build.gradle +++ b/app/build.gradle @@ -1,31 +1,78 @@ +buildscript { + repositories { +// mavenCentral() + jcenter() + } + dependencies { + classpath 'me.tatarka:gradle-retrolambda:3.6.0' + classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:${kotlinVersion}" + } + + // Exclude the lombok version that the android plugin depends on. + configurations.classpath.exclude group: 'com.android.tools.external.lombok' +} + apply plugin: 'com.android.application' +apply plugin: 'me.tatarka.retrolambda' +apply plugin: 'com.f2prateek.javafmt' +apply plugin: 'kotlin-android' dependencies { - compile 'com.android.support:support-v13:21.0.2' + compile 'com.android.support:multidex:1.0.1' + compile "com.android.support:support-v13:${supportLibVersion}" + compile "com.android.support:appcompat-v7:${supportLibVersion}" + compile "com.android.support:recyclerview-v7:${supportLibVersion}" + + compile 'com.github.kaushikgopal:CoreTextUtils:c703fa12b6' + compile "com.jakewharton:butterknife:${butterKnifeVersion}" + kapt "com.jakewharton:butterknife-compiler:${butterKnifeVersion}" + compile 'com.jakewharton.timber:timber:4.5.1' + compile "com.squareup.retrofit2:retrofit:${retrofitVersion}" + compile "com.squareup.retrofit2:converter-gson:${retrofitVersion}" + compile "com.squareup.okhttp3:okhttp:${okhttpVersion}" + compile "com.squareup.okhttp3:okhttp-urlconnection:${okhttpVersion}" + compile 'com.mcxiaoke.volley:library:1.0.19' + + compile "org.jetbrains.kotlin:kotlin-stdlib:${kotlinVersion}" + compile "com.nhaarman:mockito-kotlin:${mockitoKotlinVersion}" + + compile "android.arch.lifecycle:runtime:${archComponentsVersion}" + compile "android.arch.lifecycle:extensions:${archComponentsVersion}" + kapt "android.arch.lifecycle:compiler:${archComponentsVersion}" + + // ---------------------------------- + // Rx dependencies - compile 'com.google.guava:guava:17.+' + compile 'io.reactivex.rxjava2:rxjava:2.0.7' - compile 'com.jakewharton:butterknife:5.1.1' - compile 'com.jakewharton.timber:timber:2.4.2' - compile 'io.reactivex:rxandroid:0.23.0' - //compile 'io.reactivex:rxjava-math:0.21.0' + // Because RxAndroid releases are few and far between, it is recommended you also + // explicitly depend on RxJava's latest version for bug fixes and new features. + compile 'io.reactivex.rxjava2:rxandroid:2.0.1' - compile 'com.squareup.retrofit:retrofit:1.6.1' - compile 'com.squareup.okhttp:okhttp:2.0.0' - compile 'com.squareup.okhttp:okhttp-urlconnection:2.0.0' + compile 'com.jakewharton.rx:replaying-share-kotlin:2.0.0' + compile "com.github.akarnokd:rxjava2-extensions:0.16.0" + compile 'com.jakewharton.rxrelay2:rxrelay:2.0.0' + compile 'com.jakewharton.rxbinding2:rxbinding:2.0.0' + compile 'com.jakewharton.retrofit:retrofit2-rxjava2-adapter:1.0.0' + + // ---------------------------------- + + debugCompile 'com.squareup.leakcanary:leakcanary-android:1.5.1' + releaseCompile 'com.squareup.leakcanary:leakcanary-android-no-op:1.5.1' } android { - compileSdkVersion 21 - buildToolsVersion '21.1.2' + compileSdkVersion sdkVersion + buildToolsVersion buildToolsVrs defaultConfig { applicationId "com.morihacky.android.rxjava" - minSdkVersion 14 - targetSdkVersion 21 - versionCode 1 - versionName "1.0" + minSdkVersion 15 + targetSdkVersion sdkVersion + versionCode 2 + versionName "1.2" + multiDexEnabled true } buildTypes { release { @@ -33,8 +80,14 @@ android { proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro' } } -} - -dependencies { - compile fileTree(dir: 'libs', include: ['*.jar']) -} + sourceSets { + main.java.srcDirs += 'src/main/kotlin' + } + compileOptions { + sourceCompatibility JavaVersion.VERSION_1_8 + targetCompatibility JavaVersion.VERSION_1_8 + } + packagingOptions { + pickFirst 'META-INF/rxjava.properties' + } +} \ No newline at end of file diff --git a/app/src/main/AndroidManifest.xml b/app/src/main/AndroidManifest.xml index f0b3253e..3b469d7c 100644 --- a/app/src/main/AndroidManifest.xml +++ b/app/src/main/AndroidManifest.xml @@ -1,22 +1,28 @@ + package="com.morihacky.android.rxjava" + > + android:theme="@style/AppTheme" + > + android:label="@string/app_name" + > - + - + - + + + diff --git a/app/src/main/java/com/morihacky/android/rxjava/BufferDemoFragment.java b/app/src/main/java/com/morihacky/android/rxjava/BufferDemoFragment.java deleted file mode 100644 index fe8c0ac0..00000000 --- a/app/src/main/java/com/morihacky/android/rxjava/BufferDemoFragment.java +++ /dev/null @@ -1,173 +0,0 @@ -package com.morihacky.android.rxjava; - -import android.content.Context; -import android.os.Bundle; -import android.os.Handler; -import android.os.Looper; -import android.support.annotation.Nullable; -import android.support.v4.app.Fragment; -import android.view.LayoutInflater; -import android.view.View; -import android.view.ViewGroup; -import android.widget.ArrayAdapter; -import android.widget.Button; -import android.widget.ListView; -import butterknife.ButterKnife; -import butterknife.InjectView; -import com.morihacky.android.rxjava.app.R; -import java.util.ArrayList; -import java.util.List; -import java.util.concurrent.TimeUnit; -import rx.Observable; -import rx.Observer; -import rx.Subscriber; -import rx.Subscription; -import rx.android.schedulers.AndroidSchedulers; -import rx.schedulers.Schedulers; -import timber.log.Timber; - -/** - * credit to @tomrozb for this implementation: - * http://stackoverflow.com/questions/24922610/incorrect-understanding-of-buffer-in-rxjava - * - * An alternate mechanism of achieving the same result would be to use a {@link rx.subjects.PublishSubject} - * as demonstrated in the case of {@link com.morihacky.android.rxjava.SubjectDebounceSearchEmitterFragment} - */ -public class BufferDemoFragment - extends Fragment { - - @InjectView(R.id.list_threading_log) ListView _logsList; - @InjectView(R.id.btn_start_operation) Button _tapBtn; - - private LogAdapter _adapter; - private List _logs; - private int _tapCount = 0; - - private Subscription _subscription; - - @Override - public void onResume() { - super.onResume(); - _subscription = _getBufferedObservable().subscribe(_getObserver()); - } - - @Override - public void onPause() { - super.onPause(); - _subscription.unsubscribe(); - } - - @Override - public void onActivityCreated(@Nullable Bundle savedInstanceState) { - super.onActivityCreated(savedInstanceState); - _setupLogger(); - } - - @Override - public View onCreateView(LayoutInflater inflater, - @Nullable ViewGroup container, - @Nullable Bundle savedInstanceState) { - View layout = inflater.inflate(R.layout.fragment_buffer, container, false); - ButterKnife.inject(this, layout); - return layout; - } - - // ----------------------------------------------------------------------------------- - // Main Rx entities - - private Observable> _getBufferedObservable() { - - return Observable.create(new Observable.OnSubscribe() { - - @Override - public void call(Subscriber subscriber) { - _tapBtn.setOnClickListener(new View.OnClickListener() { - - @Override - public void onClick(View v) { - Timber.d("--------- GOT A TAP"); - _tapCount += 1; - _log("GOT A TAP"); - } - }); - } - }) - .buffer(2, TimeUnit.SECONDS) - .subscribeOn(Schedulers.io()) - .observeOn(AndroidSchedulers.mainThread()); - } - - private Observer> _getObserver() { - return new Observer>() { - - @Override - public void onCompleted() { - if (_tapCount > 0) { - _log(String.format("%d taps", _tapCount)); - _tapCount = 0; - } - } - - @Override - public void onError(Throwable e) { - Timber.e(e, "--------- Woops on error!"); - _log(String.format("Dang error. check your logs")); - } - - @Override - public void onNext(List integers) { - Timber.d("--------- onNext"); - if (integers.size() > 0) { - for (int i : integers) { - _tapCount += i; - } - } else { - Timber.d("--------- No taps received "); - } - onCompleted(); - } - }; - } - - // ----------------------------------------------------------------------------------- - // Methods that help wiring up the example (irrelevant to RxJava) - - private void _setupLogger() { - _logs = new ArrayList(); - _adapter = new LogAdapter(getActivity(), new ArrayList()); - _logsList.setAdapter(_adapter); - } - - private void _log(String logMsg) { - - if (_isCurrentlyOnMainThread()) { - _logs.add(0, logMsg + " (main thread) "); - _adapter.clear(); - _adapter.addAll(_logs); - } else { - _logs.add(0, logMsg + " (NOT main thread) "); - - // You can only do below stuff on main thread. - new Handler(Looper.getMainLooper()).post(new Runnable() { - - @Override - public void run() { - _adapter.clear(); - _adapter.addAll(_logs); - } - }); - } - } - - private boolean _isCurrentlyOnMainThread() { - return Looper.myLooper() == Looper.getMainLooper(); - } - - private class LogAdapter - extends ArrayAdapter { - - public LogAdapter(Context context, List logs) { - super(context, R.layout.item_log, R.id.item_log, logs); - } - } -} diff --git a/app/src/main/java/com/morihacky/android/rxjava/DemoTimeoutFragment.java b/app/src/main/java/com/morihacky/android/rxjava/DemoTimeoutFragment.java deleted file mode 100644 index 8770dd63..00000000 --- a/app/src/main/java/com/morihacky/android/rxjava/DemoTimeoutFragment.java +++ /dev/null @@ -1,190 +0,0 @@ -package com.morihacky.android.rxjava; - -import android.content.Context; -import android.os.Bundle; -import android.os.Handler; -import android.os.Looper; -import android.support.annotation.Nullable; -import android.support.v4.app.Fragment; -import android.view.LayoutInflater; -import android.view.View; -import android.view.ViewGroup; -import android.widget.ArrayAdapter; -import android.widget.ListView; -import butterknife.ButterKnife; -import butterknife.InjectView; -import butterknife.OnClick; -import com.morihacky.android.rxjava.app.R; -import java.util.ArrayList; -import java.util.List; -import java.util.concurrent.TimeUnit; -import rx.Observable; -import rx.Observer; -import rx.Subscriber; -import rx.Subscription; -import rx.android.observables.AndroidObservable; -import rx.android.schedulers.AndroidSchedulers; -import rx.schedulers.Schedulers; -import timber.log.Timber; - -public class DemoTimeoutFragment - extends Fragment { - - @InjectView(R.id.list_threading_log) ListView _logsList; - - private LogAdapter _adapter; - private List _logs; - - private Subscription _subscription; - - @Override - public void onDestroy() { - super.onDestroy(); - _subscription.unsubscribe(); - } - - @Override - public void onActivityCreated(@Nullable Bundle savedInstanceState) { - super.onActivityCreated(savedInstanceState); - _setupLogger(); - } - - @Override - public View onCreateView(LayoutInflater inflater, - @Nullable ViewGroup container, - @Nullable Bundle savedInstanceState) { - View layout = inflater.inflate(R.layout.fragment_subject_timeout, container, false); - ButterKnife.inject(this, layout); - return layout; - } - - @OnClick(R.id.btn_demo_timeout_1_2s) - public void onStart2sTask() { - _subscription = AndroidObservable.bindFragment(DemoTimeoutFragment.this, - _getObservableTask_2sToComplete()) - .observeOn(AndroidSchedulers.mainThread()) - .subscribe(_getEventCompletionObserver()); - } - - @OnClick(R.id.btn_demo_timeout_1_5s) - public void onStart5sTask() { - _subscription = AndroidObservable.bindFragment(DemoTimeoutFragment.this, - _getObservableFor5sTask()) - .timeout(2, TimeUnit.SECONDS, _getTimeoutObservable()) - .subscribeOn(Schedulers.computation()) - .observeOn(AndroidSchedulers.mainThread()) - .subscribe(_getEventCompletionObserver()); - } - - // ----------------------------------------------------------------------------------- - // Main Rx entities - - private Observable _getObservableFor5sTask() { - return Observable.create(new Observable.OnSubscribe() { - - @Override - public void call(Subscriber subscriber) { - _log(String.format("Starting a 5s task")); - subscriber.onNext("5 s"); - try { - Thread.sleep(1200); - } catch (InterruptedException e) { - e.printStackTrace(); - } - subscriber.onCompleted(); - } - }); - } - - private Observable _getObservableTask_2sToComplete() { - return Observable.create(new Observable.OnSubscribe() { - - @Override - public void call(Subscriber subscriber) { - _log(String.format("Starting a 2s task")); - subscriber.onNext("2 s"); - try { - Thread.sleep(2000); - } catch (InterruptedException e) { - e.printStackTrace(); - } - subscriber.onCompleted(); - } - }).subscribeOn(Schedulers.computation()).timeout(3, TimeUnit.SECONDS); - } - - private Observable _getTimeoutObservable() { - return Observable.create(new Observable.OnSubscribe() { - - @Override - public void call(Subscriber subscriber) { - _log("Timing out this task ..."); - subscriber.onCompleted(); - } - }); - } - - private Observer _getEventCompletionObserver() { - return new Observer() { - - @Override - public void onCompleted() { - _log(String.format("task was completed")); - } - - @Override - public void onError(Throwable e) { - _log(String.format("Dang a task timeout")); - onCompleted(); - Timber.e(e, "Timeout Demo exception"); - } - - @Override - public void onNext(String taskType) { - _log(String.format("onNext %s task", taskType)); - } - }; - } - - // ----------------------------------------------------------------------------------- - // Method that help wiring up the example (irrelevant to RxJava) - - private void _setupLogger() { - _logs = new ArrayList(); - _adapter = new LogAdapter(getActivity(), new ArrayList()); - _logsList.setAdapter(_adapter); - } - - private void _log(String logMsg) { - - if (_isCurrentlyOnMainThread()) { - _logs.add(0, logMsg + " (main thread) "); - _adapter.clear(); - _adapter.addAll(_logs); - } else { - _logs.add(0, logMsg + " (NOT main thread) "); - - // You can only do below stuff on main thread. - new Handler(Looper.getMainLooper()).post(new Runnable() { - - @Override - public void run() { - _adapter.clear(); - _adapter.addAll(_logs); - } - }); - } - } - - private boolean _isCurrentlyOnMainThread() { - return Looper.myLooper() == Looper.getMainLooper(); - } - - private class LogAdapter - extends ArrayAdapter { - - public LogAdapter(Context context, List logs) { - super(context, R.layout.item_log, R.id.item_log, logs); - } - } -} \ No newline at end of file diff --git a/app/src/main/java/com/morihacky/android/rxjava/DoubleBindingTextViewFragment.java b/app/src/main/java/com/morihacky/android/rxjava/DoubleBindingTextViewFragment.java deleted file mode 100644 index 27feb253..00000000 --- a/app/src/main/java/com/morihacky/android/rxjava/DoubleBindingTextViewFragment.java +++ /dev/null @@ -1,76 +0,0 @@ -package com.morihacky.android.rxjava; - -import android.content.Context; -import android.os.Bundle; -import android.support.annotation.Nullable; -import android.support.v4.app.Fragment; -import android.view.LayoutInflater; -import android.view.View; -import android.view.ViewGroup; -import android.view.inputmethod.InputMethodManager; -import android.widget.EditText; -import android.widget.TextView; -import butterknife.ButterKnife; -import butterknife.InjectView; -import butterknife.OnTextChanged; -import com.google.common.base.Strings; -import com.morihacky.android.rxjava.app.R; -import rx.Subscription; -import rx.functions.Action1; -import rx.subjects.PublishSubject; - -public class DoubleBindingTextViewFragment - extends Fragment { - - @InjectView(R.id.double_binding_num1) EditText _number1; - @InjectView(R.id.double_binding_num2) EditText _number2; - @InjectView(R.id.double_binding_result) TextView _result; - - Subscription _subscription; - PublishSubject _resultEmitterSubject; - - @Override - public View onCreateView(LayoutInflater inflater, - @Nullable ViewGroup container, - @Nullable Bundle savedInstanceState) { - View layout = inflater.inflate(R.layout.fragment_double_binding_textview, container, false); - ButterKnife.inject(this, layout); - - _resultEmitterSubject = PublishSubject.create(); - _subscription = _resultEmitterSubject.asObservable().subscribe(new Action1() { - @Override - public void call(Float aFloat) { - _result.setText(String.valueOf(aFloat)); - } - }); - - onNumberChanged(); - _number2.requestFocus(); - - return layout; - } - - @OnTextChanged({ R.id.double_binding_num1, R.id.double_binding_num2 }) - public void onNumberChanged() { - float num1 = 0; - float num2 = 0; - - if (!Strings.isNullOrEmpty(_number1.getText().toString())) { - num1 = Float.parseFloat(_number1.getText().toString()); - } - - if (!Strings.isNullOrEmpty(_number2.getText().toString())) { - num2 = Float.parseFloat(_number2.getText().toString()); - } - - _resultEmitterSubject.onNext(num1 + num2); - } - - @Override - public void onDestroyView() { - super.onDestroyView(); - if (_subscription != null) { - _subscription.unsubscribe(); - } - } -} diff --git a/app/src/main/java/com/morihacky/android/rxjava/MainActivity.java b/app/src/main/java/com/morihacky/android/rxjava/MainActivity.java index 07204647..068a393d 100644 --- a/app/src/main/java/com/morihacky/android/rxjava/MainActivity.java +++ b/app/src/main/java/com/morihacky/android/rxjava/MainActivity.java @@ -1,27 +1,33 @@ package com.morihacky.android.rxjava; import android.os.Bundle; -import android.support.v4.app.FragmentActivity; -import com.morihacky.android.rxjava.app.R; +import android.support.v4.app.Fragment; +import android.support.v7.app.AppCompatActivity; +import com.morihacky.android.rxjava.fragments.MainFragment; +import com.morihacky.android.rxjava.fragments.RotationPersist1WorkerFragment; +import com.morihacky.android.rxjava.fragments.RotationPersist2WorkerFragment; import com.morihacky.android.rxjava.rxbus.RxBus; -import timber.log.Timber; -public class MainActivity - extends FragmentActivity { +public class MainActivity extends AppCompatActivity { private RxBus _rxBus = null; + @Override + public void onBackPressed() { + super.onBackPressed(); + _removeWorkerFragments(); + } + @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); - setContentView(R.layout.activity_main); - Timber.plant(new Timber.DebugTree()); - - getSupportFragmentManager().beginTransaction() - .addToBackStack(this.toString()) - .replace(R.id.activity_main, new MainFragment(), this.toString()) - .commit(); + if (savedInstanceState == null) { + getSupportFragmentManager() + .beginTransaction() + .replace(android.R.id.content, new MainFragment(), this.toString()) + .commit(); + } } // This is better done with a DI Library like Dagger @@ -32,4 +38,22 @@ public RxBus getRxBusSingleton() { return _rxBus; } + + private void _removeWorkerFragments() { + Fragment frag = + getSupportFragmentManager() + .findFragmentByTag(RotationPersist1WorkerFragment.class.getName()); + + if (frag != null) { + getSupportFragmentManager().beginTransaction().remove(frag).commit(); + } + + frag = + getSupportFragmentManager() + .findFragmentByTag(RotationPersist2WorkerFragment.class.getName()); + + if (frag != null) { + getSupportFragmentManager().beginTransaction().remove(frag).commit(); + } + } } diff --git a/app/src/main/java/com/morihacky/android/rxjava/MainFragment.java b/app/src/main/java/com/morihacky/android/rxjava/MainFragment.java deleted file mode 100644 index ba7b8517..00000000 --- a/app/src/main/java/com/morihacky/android/rxjava/MainFragment.java +++ /dev/null @@ -1,97 +0,0 @@ -package com.morihacky.android.rxjava; - -import android.os.Bundle; -import android.support.annotation.Nullable; -import android.support.v4.app.Fragment; -import android.view.LayoutInflater; -import android.view.View; -import android.view.ViewGroup; -import butterknife.ButterKnife; -import butterknife.OnClick; -import com.morihacky.android.rxjava.app.R; -import com.morihacky.android.rxjava.rxbus.RxBusDemoFragment; - -public class MainFragment - extends Fragment { - - @Override - public View onCreateView(LayoutInflater inflater, - @Nullable ViewGroup container, - @Nullable Bundle savedInstanceState) { - View layout = inflater.inflate(R.layout.fragment_main, container, false); - ButterKnife.inject(this, layout); - return layout; - } - - @OnClick(R.id.btn_demo_schedulers) - public void demoConcurrencyWithSchedulers() { - getActivity().getSupportFragmentManager() - .beginTransaction() - .addToBackStack(this.toString()) - .replace(R.id.activity_main, new ConcurrencyWithSchedulersDemoFragment(), this.toString()) - .commit(); - } - - @OnClick(R.id.btn_demo_buffer) - public void demoBuffer() { - getActivity().getSupportFragmentManager() - .beginTransaction() - .addToBackStack(this.toString()) - .replace(R.id.activity_main, new BufferDemoFragment(), this.toString()) - .commit(); - } - - @OnClick(R.id.btn_demo_subject_debounce) - public void demoThrottling() { - getActivity().getSupportFragmentManager() - .beginTransaction() - .addToBackStack(this.toString()) - .replace(R.id.activity_main, new SubjectDebounceSearchEmitterFragment(), this.toString()) - .commit(); - } - - @OnClick(R.id.btn_demo_retrofit) - public void demoRetrofitCalls() { - getActivity().getSupportFragmentManager() - .beginTransaction() - .addToBackStack(this.toString()) - .replace(R.id.activity_main, new RetrofitFragment(), this.toString()) - .commit(); - } - - @OnClick(R.id.btn_demo_double_binding_textview) - public void demoDoubleBindingWithPublishSubject() { - getActivity().getSupportFragmentManager() - .beginTransaction() - .addToBackStack(this.toString()) - .replace(R.id.activity_main, new DoubleBindingTextViewFragment(), this.toString()) - .commit(); - } - - @OnClick(R.id.btn_demo_polling) - public void demoPolling() { - getActivity().getSupportFragmentManager() - .beginTransaction() - .addToBackStack(this.toString()) - .replace(R.id.activity_main, new PollingFragment(), this.toString()) - .commit(); - } - - @OnClick(R.id.btn_demo_rxbus) - public void demoRxBus() { - getActivity().getSupportFragmentManager() - .beginTransaction() - .addToBackStack(this.toString()) - .replace(R.id.activity_main, new RxBusDemoFragment(), this.toString()) - .commit(); - } - - //@OnClick(R.id.btn_demo_subject_timeout) - public void demoTimeout() { - getActivity().getSupportFragmentManager() - .beginTransaction() - .addToBackStack(this.toString()) - .replace(R.id.activity_main, new DemoTimeoutFragment(), this.toString()) - .commit(); - } -} diff --git a/app/src/main/java/com/morihacky/android/rxjava/MyApp.java b/app/src/main/java/com/morihacky/android/rxjava/MyApp.java new file mode 100644 index 00000000..23a90b23 --- /dev/null +++ b/app/src/main/java/com/morihacky/android/rxjava/MyApp.java @@ -0,0 +1,43 @@ +package com.morihacky.android.rxjava; + +import android.support.multidex.MultiDexApplication; +import com.morihacky.android.rxjava.volley.MyVolley; +import com.squareup.leakcanary.LeakCanary; +import com.squareup.leakcanary.RefWatcher; +import timber.log.Timber; + +public class MyApp extends MultiDexApplication { + + private static MyApp _instance; + private RefWatcher _refWatcher; + + public static MyApp get() { + return _instance; + } + + public static RefWatcher getRefWatcher() { + return MyApp.get()._refWatcher; + } + + @Override + public void onCreate() { + super.onCreate(); + + if (LeakCanary.isInAnalyzerProcess(this)) { + // This process is dedicated to LeakCanary for heap analysis. + // You should not init your app in this process. + return; + } + + _instance = (MyApp) getApplicationContext(); + _refWatcher = LeakCanary.install(this); + + // for better RxJava debugging + //RxJavaHooks.enableAssemblyTracking(); + + // Initialize Volley + MyVolley.init(this); + + Timber.plant(new Timber.DebugTree()); + } +} diff --git a/app/src/main/java/com/morihacky/android/rxjava/PollingFragment.java b/app/src/main/java/com/morihacky/android/rxjava/PollingFragment.java deleted file mode 100644 index 50c20c90..00000000 --- a/app/src/main/java/com/morihacky/android/rxjava/PollingFragment.java +++ /dev/null @@ -1,137 +0,0 @@ -package com.morihacky.android.rxjava; - -import android.content.Context; -import android.os.Bundle; -import android.os.Handler; -import android.os.Looper; -import android.support.annotation.Nullable; -import android.support.v4.app.Fragment; -import android.view.LayoutInflater; -import android.view.View; -import android.view.ViewGroup; -import android.widget.ArrayAdapter; -import android.widget.ListView; -import butterknife.ButterKnife; -import butterknife.InjectView; -import butterknife.OnClick; -import com.morihacky.android.rxjava.app.R; -import java.util.ArrayList; -import java.util.List; -import java.util.concurrent.TimeUnit; -import rx.Observable; -import rx.Subscriber; -import rx.functions.Action0; -import rx.functions.Action1; -import rx.schedulers.Schedulers; -import rx.subscriptions.CompositeSubscription; -import timber.log.Timber; - -public class PollingFragment - extends Fragment { - - public static final int INITIAL_DELAY = 0; - public static final int POLLING_INTERVAL = 1000; - @InjectView(R.id.list_threading_log) ListView _logsList; - - private LogAdapter _adapter; - private List _logs; - private CompositeSubscription _subscriptions; - private int _counter = 0; - - @Override - public void onDestroy() { - super.onDestroy(); - _subscriptions.unsubscribe(); - } - - @Override - public void onActivityCreated(@Nullable Bundle savedInstanceState) { - super.onActivityCreated(savedInstanceState); - _subscriptions = new CompositeSubscription(); - _setupLogger(); - } - - @Override - public View onCreateView(LayoutInflater inflater, - @Nullable ViewGroup container, - @Nullable Bundle savedInstanceState) { - View layout = inflater.inflate(R.layout.fragment_polling, container, false); - ButterKnife.inject(this, layout); - return layout; - } - - @OnClick(R.id.btn_start_simple_polling) - public void onStartSimplePollingClicked() { - _subscriptions.add(Observable.create(new Observable.OnSubscribe() { - @Override - public void call(final Subscriber observer) { - - Schedulers.newThread().createWorker() // - .schedulePeriodically(new Action0() { - @Override - public void call() { - observer.onNext(_doNetworkCallAndGetStringResult()); - } - }, INITIAL_DELAY, POLLING_INTERVAL, TimeUnit.MILLISECONDS); - } - }).take(10).subscribe(new Action1() { - @Override - public void call(String s) { - _log(String.format("String polling - %s", s)); - } - })); - } - - // ----------------------------------------------------------------------------------- - // Method that help wiring up the example (irrelevant to RxJava) - - private String _doNetworkCallAndGetStringResult() { - - try { - Thread.sleep(3000); - } catch (InterruptedException e) { - Timber.d("Operation was interrupted"); - } - _counter++; - - return String.valueOf(_counter); - } - - private void _log(String logMsg) { - if (_isCurrentlyOnMainThread()) { - _logs.add(0, logMsg + " (main thread) "); - _adapter.clear(); - _adapter.addAll(_logs); - } else { - _logs.add(0, logMsg + " (NOT main thread) "); - - // You can only do below stuff on main thread. - new Handler(Looper.getMainLooper()).post(new Runnable() { - - @Override - public void run() { - _adapter.clear(); - _adapter.addAll(_logs); - } - }); - } - } - - private void _setupLogger() { - _logs = new ArrayList(); - _adapter = new LogAdapter(getActivity(), new ArrayList()); - _logsList.setAdapter(_adapter); - } - - private boolean _isCurrentlyOnMainThread() { - return Looper.myLooper() == Looper.getMainLooper(); - } - - private class LogAdapter - extends ArrayAdapter { - - public LogAdapter(Context context, List logs) { - super(context, R.layout.item_log, R.id.item_log, logs); - } - } -} \ No newline at end of file diff --git a/app/src/main/java/com/morihacky/android/rxjava/RetrofitFragment.java b/app/src/main/java/com/morihacky/android/rxjava/RetrofitFragment.java deleted file mode 100644 index 31d41fa1..00000000 --- a/app/src/main/java/com/morihacky/android/rxjava/RetrofitFragment.java +++ /dev/null @@ -1,135 +0,0 @@ -package com.morihacky.android.rxjava; - -import android.os.Bundle; -import android.support.annotation.Nullable; -import android.support.v4.app.Fragment; -import android.view.LayoutInflater; -import android.view.View; -import android.view.ViewGroup; -import android.widget.EditText; -import butterknife.ButterKnife; -import butterknife.InjectView; -import butterknife.OnClick; -import com.google.common.base.Strings; -import com.morihacky.android.rxjava.app.R; -import com.morihacky.android.rxjava.retrofit.Contributor; -import com.morihacky.android.rxjava.retrofit.GithubApi; -import com.morihacky.android.rxjava.retrofit.User; -import java.util.List; -import retrofit.RestAdapter; -import rx.Observable; -import rx.Observer; -import rx.android.schedulers.AndroidSchedulers; -import rx.functions.Func1; -import rx.functions.Func2; -import rx.schedulers.Schedulers; -import timber.log.Timber; - -public class RetrofitFragment - extends Fragment { - - GithubApi api; - - @InjectView(R.id.demo_retrofit_contributors_username) EditText _username; - @InjectView(R.id.demo_retrofit_contributors_repository) EditText _repo; - - @Override - public void onCreate(Bundle savedInstanceState) { - super.onCreate(savedInstanceState); - - RestAdapter restAdapter = new RestAdapter.Builder().setEndpoint("https://api.github.com/") - .build(); - - api = restAdapter.create(GithubApi.class); - } - - @Override - public View onCreateView(LayoutInflater inflater, - @Nullable ViewGroup container, - @Nullable Bundle savedInstanceState) { - View layout = inflater.inflate(R.layout.fragment_retrofit, container, false); - ButterKnife.inject(this, layout); - return layout; - } - - @OnClick(R.id.btn_demo_retrofit_contributors) - public void onListContributorsClicked() { - api.contributors(_username.getText().toString(), _repo.getText().toString()) - .subscribe(new Observer>() { - @Override - public void onCompleted() { - Timber.d("Retrofit call 1 completed"); - } - - @Override - public void onError(Throwable e) { - Timber.e(e, "woops we got an error while getting the list of contributors"); - } - - @Override - public void onNext(List contributors) { - for (Contributor c : contributors) { - Timber.d("%s has made %d contributions to %s", - c.login, - c.contributions, - _repo.getText().toString()); - } - } - }); - } - - @OnClick(R.id.btn_demo_retrofit_contributors_with_user_info) - public void onListContributorsWithFullUserInfoClicked() { - api.contributors(_username.getText().toString(), _repo.getText().toString()) - .flatMap(new Func1, Observable>() { - @Override - public Observable call(List contributors) { - return Observable.from(contributors); - } - }) - .flatMap(new Func1>() { - @Override - public Observable call(Contributor contributor) { - Observable.zip(Observable.just(contributor), - api.user(contributor.login).filter(new Func1() { - @Override - public Boolean call(User user) { - return !Strings.isNullOrEmpty(user.name) && !Strings.isNullOrEmpty(user.email); - } - }), - new Func2() { - @Override - public Object call(Contributor contributor, User user) { - Timber.d("%s(%s) has made %d contributions to %s", - user.name, - user.email, - contributor.contributions, - _repo.getText().toString()); - - return Observable.empty(); - } - }).subscribe(); - return Observable.empty(); - } - }) - .subscribeOn(Schedulers.newThread()) - .observeOn(AndroidSchedulers.mainThread()) - .subscribe(new Observer() { - @Override - public void onCompleted() { - Timber.d("Retrofit call 2 completed "); - } - - @Override - public void onError(Throwable e) { - Timber.e(e, - "woops we got an error while getting the list of contributors along with full names"); - } - - @Override - public void onNext(Object o) { - Timber.d("hi! onNext"); - } - }); - } -} diff --git a/app/src/main/java/com/morihacky/android/rxjava/SubjectDebounceSearchEmitterFragment.java b/app/src/main/java/com/morihacky/android/rxjava/SubjectDebounceSearchEmitterFragment.java deleted file mode 100644 index 793d0296..00000000 --- a/app/src/main/java/com/morihacky/android/rxjava/SubjectDebounceSearchEmitterFragment.java +++ /dev/null @@ -1,178 +0,0 @@ -package com.morihacky.android.rxjava; - -import android.content.Context; -import android.os.Bundle; -import android.os.Handler; -import android.os.Looper; -import android.support.annotation.Nullable; -import android.support.v4.app.Fragment; -import android.view.LayoutInflater; -import android.view.View; -import android.view.ViewGroup; -import android.widget.ArrayAdapter; -import android.widget.ListView; -import butterknife.ButterKnife; -import butterknife.InjectView; -import butterknife.OnTextChanged; -import com.morihacky.android.rxjava.app.R; -import java.util.ArrayList; -import java.util.List; -import java.util.concurrent.TimeUnit; -import rx.Observable; -import rx.Observer; -import rx.Subscriber; -import rx.Subscription; -import rx.android.observables.AndroidObservable; -import rx.android.schedulers.AndroidSchedulers; -import rx.schedulers.Schedulers; -import rx.subjects.PublishSubject; -import timber.log.Timber; - -/** - * The reason we use a Subject for tracking the search query is because it emits observables. - * Because a Subject subscribes to an Observable, it will trigger that Observable to begin emitting items - * (if that Observable is "cold" — that is, if it waits for a subscription before it begins to emit items). - * This can have the effect of making the resulting Subject a "hot" Observable variant of the original "cold" Observable. - * - * This allows us to create the subject and subscription one time onActivity creation - * Subsequently we send in Observables to the Subject's subscriber onTextChanged - * - * (unlike the way it's done in {@link com.morihacky.android.rxjava.ConcurrencyWithSchedulersDemoFragment#startLongOperation()}) - * where we create the subscription on every single event change (OnClick or OnTextchanged) which is - * - * wasteful! : not really since we anyway unsubscribe in OnDestroyView - * less-elegant : as a concept for sure - * simpler actually : adds one more step in the 3 step subscription process, where we create emitter, and then send observables to that emitter) - * incapable of debounce : this is the primary reason, since creating new observable everytime in subscription disregards debounce on subsequent calls - */ -public class SubjectDebounceSearchEmitterFragment - extends Fragment { - - @InjectView(R.id.list_threading_log) ListView _logsList; - - private LogAdapter _adapter; - private List _logs; - - private Subscription _subscription; - private PublishSubject> _searchTextEmitterSubject; - - @OnTextChanged(R.id.input_txt_subject_debounce) - public void onTextEntered(CharSequence charsEntered) { - Timber.d("---------- text entered %s", charsEntered); - _searchTextEmitterSubject.onNext(_getASearchObservableFor(charsEntered.toString())); - } - - @Override - public void onDestroy() { - super.onDestroy(); - if (_subscription != null) { - _subscription.unsubscribe(); - } - } - - @Override - public View onCreateView(LayoutInflater inflater, - @Nullable ViewGroup container, - @Nullable Bundle savedInstanceState) { - View layout = inflater.inflate(R.layout.fragment_subject_debounce, container, false); - ButterKnife.inject(this, layout); - return layout; - } - - @Override - public void onActivityCreated(@Nullable Bundle savedInstanceState) { - super.onActivityCreated(savedInstanceState); - _setupLogger(); - - _searchTextEmitterSubject = PublishSubject.create(); - _subscription = AndroidObservable.bindFragment(SubjectDebounceSearchEmitterFragment.this, - Observable.switchOnNext(_searchTextEmitterSubject)) - .debounce(400, TimeUnit.MILLISECONDS, Schedulers.io()) - .observeOn(AndroidSchedulers.mainThread()) - .subscribe(_getSearchObserver()); - } - - // ----------------------------------------------------------------------------------- - // Main Rx entities - - private Observer _getSearchObserver() { - return new Observer() { - - @Override - public void onCompleted() { - Timber.d("--------- onComplete"); - } - - @Override - public void onError(Throwable e) { - Timber.e(e, "--------- Woops on error!"); - _log(String.format("Dang error. check your logs")); - } - - @Override - public void onNext(String searchText) { - _log(String.format("onNext You searched for %s", searchText)); - onCompleted(); - } - }; - } - - /** - * @param searchText search text entered onTextChange - * @return a new observable which searches for text searchText, explicitly say you want subscription to be done on a a non-UI thread, otherwise it'll default to the main thread. - */ - private Observable _getASearchObservableFor(final String searchText) { - return Observable.create(new Observable.OnSubscribe() { - - @Override - public void call(Subscriber subscriber) { - - Timber.d("----------- inside the search observable"); - subscriber.onNext(searchText); - // subscriber.onCompleted(); This seems to have no effect. - } - }).subscribeOn(Schedulers.io()); - } - - // ----------------------------------------------------------------------------------- - // Method that help wiring up the example (irrelevant to RxJava) - - private void _setupLogger() { - _logs = new ArrayList(); - _adapter = new LogAdapter(getActivity(), new ArrayList()); - _logsList.setAdapter(_adapter); - } - - private void _log(String logMsg) { - - if (_isCurrentlyOnMainThread()) { - _logs.add(0, logMsg + " (main thread) "); - _adapter.clear(); - _adapter.addAll(_logs); - } else { - _logs.add(0, logMsg + " (NOT main thread) "); - - // You can only do below stuff on main thread. - new Handler(Looper.getMainLooper()).post(new Runnable() { - - @Override - public void run() { - _adapter.clear(); - _adapter.addAll(_logs); - } - }); - } - } - - private boolean _isCurrentlyOnMainThread() { - return Looper.myLooper() == Looper.getMainLooper(); - } - - private class LogAdapter - extends ArrayAdapter { - - public LogAdapter(Context context, List logs) { - super(context, R.layout.item_log, R.id.item_log, logs); - } - } -} \ No newline at end of file diff --git a/app/src/main/java/com/morihacky/android/rxjava/fragments/BaseFragment.java b/app/src/main/java/com/morihacky/android/rxjava/fragments/BaseFragment.java new file mode 100644 index 00000000..4ce242f3 --- /dev/null +++ b/app/src/main/java/com/morihacky/android/rxjava/fragments/BaseFragment.java @@ -0,0 +1,15 @@ +package com.morihacky.android.rxjava.fragments; + +import android.support.v4.app.Fragment; +import com.morihacky.android.rxjava.MyApp; +import com.squareup.leakcanary.RefWatcher; + +public class BaseFragment extends Fragment { + + @Override + public void onDestroy() { + super.onDestroy(); + RefWatcher refWatcher = MyApp.getRefWatcher(); + refWatcher.watch(this); + } +} diff --git a/app/src/main/java/com/morihacky/android/rxjava/fragments/BufferDemoFragment.java b/app/src/main/java/com/morihacky/android/rxjava/fragments/BufferDemoFragment.java new file mode 100644 index 00000000..bf51b85c --- /dev/null +++ b/app/src/main/java/com/morihacky/android/rxjava/fragments/BufferDemoFragment.java @@ -0,0 +1,160 @@ +package com.morihacky.android.rxjava.fragments; + +import android.os.Bundle; +import android.os.Handler; +import android.os.Looper; +import android.support.annotation.Nullable; +import android.view.LayoutInflater; +import android.view.View; +import android.view.ViewGroup; +import android.widget.Button; +import android.widget.ListView; + +import com.jakewharton.rxbinding2.view.RxView; +import com.morihacky.android.rxjava.R; +import com.morihacky.android.rxjava.wiring.LogAdapter; + +import java.util.ArrayList; +import java.util.List; +import java.util.concurrent.TimeUnit; + +import butterknife.BindView; +import butterknife.ButterKnife; +import butterknife.Unbinder; +import io.reactivex.android.schedulers.AndroidSchedulers; +import io.reactivex.disposables.Disposable; +import io.reactivex.observers.DisposableObserver; +import timber.log.Timber; + +/** + * This is a demonstration of the `buffer` Observable. + * + *

The buffer observable allows taps to be collected only within a time span. So taps outside the + * 2s limit imposed by buffer will get accumulated in the next log statement. + * + *

If you're looking for a more foolproof solution that accumulates "continuous" taps vs a more + * dumb solution as show below (i.e. number of taps within a timespan) look at {@link + * com.morihacky.android.rxjava.rxbus.RxBusDemo_Bottom3Fragment} where a combo of `publish` and + * `buffer` is used. + * + *

Also http://nerds.weddingpartyapp.com/tech/2015/01/05/debouncedbuffer-used-in-rxbus-example/ + * if you're looking for words instead of code + */ +public class BufferDemoFragment extends BaseFragment { + + @BindView(R.id.list_threading_log) + ListView _logsList; + + @BindView(R.id.btn_start_operation) + Button _tapBtn; + + private LogAdapter _adapter; + private List _logs; + + private Disposable _disposable; + private Unbinder unbinder; + + @Override + public void onResume() { + super.onResume(); + _disposable = _getBufferedDisposable(); + } + + @Override + public void onPause() { + super.onPause(); + _disposable.dispose(); + } + + @Override + public void onActivityCreated(@Nullable Bundle savedInstanceState) { + super.onActivityCreated(savedInstanceState); + _setupLogger(); + } + + @Override + public View onCreateView( + LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) { + View layout = inflater.inflate(R.layout.fragment_buffer, container, false); + unbinder = ButterKnife.bind(this, layout); + return layout; + } + + @Override + public void onDestroyView() { + super.onDestroyView(); + unbinder.unbind(); + } + + // ----------------------------------------------------------------------------------- + // Main Rx entities + + private Disposable _getBufferedDisposable() { + return RxView.clicks(_tapBtn) + .map( + onClickEvent -> { + Timber.d("--------- GOT A TAP"); + _log("GOT A TAP"); + return 1; + }) + .buffer(2, TimeUnit.SECONDS) + .observeOn(AndroidSchedulers.mainThread()) + .subscribeWith( + new DisposableObserver>() { + + @Override + public void onComplete() { + // fyi: you'll never reach here + Timber.d("----- onCompleted"); + } + + @Override + public void onError(Throwable e) { + Timber.e(e, "--------- Woops on error!"); + _log("Dang error! check your logs"); + } + + @Override + public void onNext(List integers) { + Timber.d("--------- onNext"); + if (integers.size() > 0) { + _log(String.format("%d taps", integers.size())); + } else { + Timber.d("--------- No taps received "); + } + } + }); + } + + // ----------------------------------------------------------------------------------- + // Methods that help wiring up the example (irrelevant to RxJava) + + private void _setupLogger() { + _logs = new ArrayList<>(); + _adapter = new LogAdapter(getActivity(), new ArrayList<>()); + _logsList.setAdapter(_adapter); + } + + private void _log(String logMsg) { + + if (_isCurrentlyOnMainThread()) { + _logs.add(0, logMsg + " (main thread) "); + _adapter.clear(); + _adapter.addAll(_logs); + } else { + _logs.add(0, logMsg + " (NOT main thread) "); + + // You can only do below stuff on main thread. + new Handler(Looper.getMainLooper()) + .post( + () -> { + _adapter.clear(); + _adapter.addAll(_logs); + }); + } + } + + private boolean _isCurrentlyOnMainThread() { + return Looper.myLooper() == Looper.getMainLooper(); + } +} diff --git a/app/src/main/java/com/morihacky/android/rxjava/ConcurrencyWithSchedulersDemoFragment.java b/app/src/main/java/com/morihacky/android/rxjava/fragments/ConcurrencyWithSchedulersDemoFragment.java similarity index 53% rename from app/src/main/java/com/morihacky/android/rxjava/ConcurrencyWithSchedulersDemoFragment.java rename to app/src/main/java/com/morihacky/android/rxjava/fragments/ConcurrencyWithSchedulersDemoFragment.java index 03611474..9a9a61ea 100644 --- a/app/src/main/java/com/morihacky/android/rxjava/ConcurrencyWithSchedulersDemoFragment.java +++ b/app/src/main/java/com/morihacky/android/rxjava/fragments/ConcurrencyWithSchedulersDemoFragment.java @@ -1,48 +1,49 @@ -package com.morihacky.android.rxjava; +package com.morihacky.android.rxjava.fragments; import android.content.Context; import android.os.Bundle; import android.os.Handler; import android.os.Looper; import android.support.annotation.Nullable; -import android.support.v4.app.Fragment; import android.view.LayoutInflater; import android.view.View; import android.view.ViewGroup; import android.widget.ArrayAdapter; import android.widget.ListView; import android.widget.ProgressBar; +import butterknife.BindView; import butterknife.ButterKnife; -import butterknife.InjectView; import butterknife.OnClick; -import com.morihacky.android.rxjava.app.R; +import com.morihacky.android.rxjava.R; + +import butterknife.Unbinder; +import io.reactivex.Observable; +import io.reactivex.android.schedulers.AndroidSchedulers; +import io.reactivex.disposables.CompositeDisposable; +import io.reactivex.observers.DisposableObserver; +import io.reactivex.schedulers.Schedulers; import java.util.ArrayList; import java.util.List; -import rx.Observable; -import rx.Observer; -import rx.Subscriber; -import rx.Subscription; -import rx.android.observables.AndroidObservable; -import rx.android.schedulers.AndroidSchedulers; -import rx.schedulers.Schedulers; import timber.log.Timber; -public class ConcurrencyWithSchedulersDemoFragment - extends Fragment { +public class ConcurrencyWithSchedulersDemoFragment extends BaseFragment { - @InjectView(R.id.progress_operation_running) ProgressBar _progress; - @InjectView(R.id.list_threading_log) ListView _logsList; + @BindView(R.id.progress_operation_running) + ProgressBar _progress; + + @BindView(R.id.list_threading_log) + ListView _logsList; private LogAdapter _adapter; private List _logs; - private Subscription _subscription; + private CompositeDisposable _disposables = new CompositeDisposable(); + private Unbinder unbinder; @Override public void onDestroy() { super.onDestroy(); - if (_subscription != null) { - _subscription.unsubscribe(); - } + unbinder.unbind(); + _disposables.clear(); } @Override @@ -52,11 +53,10 @@ public void onActivityCreated(@Nullable Bundle savedInstanceState) { } @Override - public View onCreateView(LayoutInflater inflater, - @Nullable ViewGroup container, - @Nullable Bundle savedInstanceState) { + public View onCreateView( + LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) { View layout = inflater.inflate(R.layout.fragment_concurrency_schedulers, container, false); - ButterKnife.inject(this, layout); + unbinder = ButterKnife.bind(this, layout); return layout; } @@ -66,40 +66,36 @@ public void startLongOperation() { _progress.setVisibility(View.VISIBLE); _log("Button Clicked"); - _subscription = AndroidObservable.bindFragment(this, _getObservable()) // Observable + DisposableObserver d = _getDisposableObserver(); + + _getObservable() .subscribeOn(Schedulers.io()) .observeOn(AndroidSchedulers.mainThread()) - .subscribe(_getObserver()); // Observer + .subscribe(d); + + _disposables.add(d); } private Observable _getObservable() { - return Observable.create(new Observable.OnSubscribe() { - - @Override - public void call(Subscriber observer) { - - _log("Within Observable"); - - _doSomeLongOperation_thatBlocksCurrentThread(); - observer.onNext(true); - observer.onCompleted(); - } - }); + return Observable.just(true) + .map( + aBoolean -> { + _log("Within Observable"); + _doSomeLongOperation_thatBlocksCurrentThread(); + return aBoolean; + }); } /** - * Observer that handles the result List from Observable - * through the 3 important actions: + * Observer that handles the result through the 3 important actions: * - * 1. onCompleted - * 2. onError - * 3. onNext + *

1. onCompleted 2. onError 3. onNext */ - private Observer _getObserver() { - return new Observer() { + private DisposableObserver _getDisposableObserver() { + return new DisposableObserver() { @Override - public void onCompleted() { + public void onComplete() { _log("On complete"); _progress.setVisibility(View.INVISIBLE); } @@ -107,13 +103,13 @@ public void onCompleted() { @Override public void onError(Throwable e) { Timber.e(e, "Error in RxJava Demo concurrency"); - _log(String.format("Boo Error %s", e.getMessage())); + _log(String.format("Boo! Error %s", e.getMessage())); _progress.setVisibility(View.INVISIBLE); } @Override - public void onNext(Boolean aBoolean) { - _log(String.format("onNext with return value \"%b\"", aBoolean)); + public void onNext(Boolean bool) { + _log(String.format("onNext with return value \"%b\"", bool)); } }; } @@ -141,20 +137,18 @@ private void _log(String logMsg) { _logs.add(0, logMsg + " (NOT main thread) "); // You can only do below stuff on main thread. - new Handler(Looper.getMainLooper()).post(new Runnable() { - - @Override - public void run() { - _adapter.clear(); - _adapter.addAll(_logs); - } - }); + new Handler(Looper.getMainLooper()) + .post( + () -> { + _adapter.clear(); + _adapter.addAll(_logs); + }); } } private void _setupLogger() { - _logs = new ArrayList(); - _adapter = new LogAdapter(getActivity(), new ArrayList()); + _logs = new ArrayList<>(); + _adapter = new LogAdapter(getActivity(), new ArrayList<>()); _logsList.setAdapter(_adapter); } @@ -162,11 +156,10 @@ private boolean _isCurrentlyOnMainThread() { return Looper.myLooper() == Looper.getMainLooper(); } - private class LogAdapter - extends ArrayAdapter { + private class LogAdapter extends ArrayAdapter { public LogAdapter(Context context, List logs) { super(context, R.layout.item_log, R.id.item_log, logs); } } -} \ No newline at end of file +} diff --git a/app/src/main/java/com/morihacky/android/rxjava/fragments/DebounceSearchEmitterFragment.java b/app/src/main/java/com/morihacky/android/rxjava/fragments/DebounceSearchEmitterFragment.java new file mode 100644 index 00000000..2d62cff7 --- /dev/null +++ b/app/src/main/java/com/morihacky/android/rxjava/fragments/DebounceSearchEmitterFragment.java @@ -0,0 +1,145 @@ +package com.morihacky.android.rxjava.fragments; + +import android.content.Context; +import android.os.Bundle; +import android.os.Handler; +import android.os.Looper; +import android.support.annotation.Nullable; +import android.view.LayoutInflater; +import android.view.View; +import android.view.ViewGroup; +import android.widget.ArrayAdapter; +import android.widget.EditText; +import android.widget.ListView; + +import com.jakewharton.rxbinding2.widget.RxTextView; +import com.jakewharton.rxbinding2.widget.TextViewTextChangeEvent; +import com.morihacky.android.rxjava.R; + +import java.util.ArrayList; +import java.util.List; +import java.util.concurrent.TimeUnit; + +import butterknife.BindView; +import butterknife.ButterKnife; +import butterknife.OnClick; +import butterknife.Unbinder; +import io.reactivex.android.schedulers.AndroidSchedulers; +import io.reactivex.disposables.Disposable; +import io.reactivex.observers.DisposableObserver; +import timber.log.Timber; + +import static co.kaush.core.util.CoreNullnessUtils.isNotNullOrEmpty; +import static java.lang.String.format; + +public class DebounceSearchEmitterFragment extends BaseFragment { + + @BindView(R.id.list_threading_log) + ListView _logsList; + + @BindView(R.id.input_txt_debounce) + EditText _inputSearchText; + + private LogAdapter _adapter; + private List _logs; + + private Disposable _disposable; + private Unbinder unbinder; + + @Override + public void onDestroy() { + super.onDestroy(); + _disposable.dispose(); + unbinder.unbind(); + } + + @Override + public View onCreateView( + LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) { + View layout = inflater.inflate(R.layout.fragment_debounce, container, false); + unbinder = ButterKnife.bind(this, layout); + return layout; + } + + @OnClick(R.id.clr_debounce) + public void onClearLog() { + _logs = new ArrayList<>(); + _adapter.clear(); + } + + @Override + public void onActivityCreated(@Nullable Bundle savedInstanceState) { + + super.onActivityCreated(savedInstanceState); + _setupLogger(); + + _disposable = + RxTextView.textChangeEvents(_inputSearchText) + .debounce(400, TimeUnit.MILLISECONDS) // default Scheduler is Computation + .filter(changes -> isNotNullOrEmpty(changes.text().toString())) + .observeOn(AndroidSchedulers.mainThread()) + .subscribeWith(_getSearchObserver()); + } + + // ----------------------------------------------------------------------------------- + // Main Rx entities + + private DisposableObserver _getSearchObserver() { + return new DisposableObserver() { + @Override + public void onComplete() { + Timber.d("--------- onComplete"); + } + + @Override + public void onError(Throwable e) { + Timber.e(e, "--------- Woops on error!"); + _log("Dang error. check your logs"); + } + + @Override + public void onNext(TextViewTextChangeEvent onTextChangeEvent) { + _log(format("Searching for %s", onTextChangeEvent.text().toString())); + } + }; + } + + // ----------------------------------------------------------------------------------- + // Method that help wiring up the example (irrelevant to RxJava) + + private void _setupLogger() { + _logs = new ArrayList<>(); + _adapter = new LogAdapter(getActivity(), new ArrayList<>()); + _logsList.setAdapter(_adapter); + } + + private void _log(String logMsg) { + + if (_isCurrentlyOnMainThread()) { + _logs.add(0, logMsg + " (main thread) "); + _adapter.clear(); + _adapter.addAll(_logs); + } else { + _logs.add(0, logMsg + " (NOT main thread) "); + + // You can only do below stuff on main thread. + new Handler(Looper.getMainLooper()) + .post( + () -> { + _adapter.clear(); + _adapter.addAll(_logs); + }); + } + } + + private boolean _isCurrentlyOnMainThread() { + return Looper.myLooper() == Looper.getMainLooper(); + } + + private class LogAdapter extends ArrayAdapter { + + public LogAdapter(Context context, List logs) { + super(context, R.layout.item_log, R.id.item_log, logs); + } + } +} diff --git a/app/src/main/java/com/morihacky/android/rxjava/fragments/DoubleBindingTextViewFragment.java b/app/src/main/java/com/morihacky/android/rxjava/fragments/DoubleBindingTextViewFragment.java new file mode 100644 index 00000000..883f043e --- /dev/null +++ b/app/src/main/java/com/morihacky/android/rxjava/fragments/DoubleBindingTextViewFragment.java @@ -0,0 +1,78 @@ +package com.morihacky.android.rxjava.fragments; + +import android.os.Bundle; +import android.support.annotation.Nullable; +import android.view.LayoutInflater; +import android.view.View; +import android.view.ViewGroup; +import android.widget.EditText; +import android.widget.TextView; +import butterknife.BindView; +import butterknife.ButterKnife; +import butterknife.OnTextChanged; +import com.morihacky.android.rxjava.R; + +import butterknife.Unbinder; +import io.reactivex.disposables.Disposable; +import io.reactivex.processors.PublishProcessor; + +import static android.text.TextUtils.isEmpty; + +public class DoubleBindingTextViewFragment extends BaseFragment { + + @BindView(R.id.double_binding_num1) + EditText _number1; + + @BindView(R.id.double_binding_num2) + EditText _number2; + + @BindView(R.id.double_binding_result) + TextView _result; + + Disposable _disposable; + PublishProcessor _resultEmitterSubject; + private Unbinder unbinder; + + @Override + public View onCreateView( + LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) { + View layout = inflater.inflate(R.layout.fragment_double_binding_textview, container, false); + unbinder = ButterKnife.bind(this, layout); + + _resultEmitterSubject = PublishProcessor.create(); + + _disposable = + _resultEmitterSubject.subscribe( + aFloat -> { + _result.setText(String.valueOf(aFloat)); + }); + + onNumberChanged(); + _number2.requestFocus(); + + return layout; + } + + @OnTextChanged({R.id.double_binding_num1, R.id.double_binding_num2}) + public void onNumberChanged() { + float num1 = 0; + float num2 = 0; + + if (!isEmpty(_number1.getText().toString())) { + num1 = Float.parseFloat(_number1.getText().toString()); + } + + if (!isEmpty(_number2.getText().toString())) { + num2 = Float.parseFloat(_number2.getText().toString()); + } + + _resultEmitterSubject.onNext(num1 + num2); + } + + @Override + public void onDestroyView() { + super.onDestroyView(); + _disposable.dispose(); + unbinder.unbind(); + } +} diff --git a/app/src/main/java/com/morihacky/android/rxjava/fragments/ExponentialBackoffFragment.java b/app/src/main/java/com/morihacky/android/rxjava/fragments/ExponentialBackoffFragment.java new file mode 100644 index 00000000..775feaef --- /dev/null +++ b/app/src/main/java/com/morihacky/android/rxjava/fragments/ExponentialBackoffFragment.java @@ -0,0 +1,234 @@ +package com.morihacky.android.rxjava.fragments; + +import android.os.Bundle; +import android.os.Handler; +import android.support.annotation.Nullable; +import android.view.LayoutInflater; +import android.view.View; +import android.view.ViewGroup; +import android.widget.ListView; + +import butterknife.BindView; +import butterknife.ButterKnife; +import butterknife.OnClick; +import com.morihacky.android.rxjava.R; +import com.morihacky.android.rxjava.wiring.LogAdapter; + +import butterknife.Unbinder; +import hu.akarnokd.rxjava2.math.MathFlowable; +import io.reactivex.Flowable; +import io.reactivex.disposables.CompositeDisposable; +import io.reactivex.functions.Function; +import io.reactivex.subscribers.DisposableSubscriber; +import java.util.ArrayList; +import java.util.List; +import java.util.concurrent.TimeUnit; +import org.reactivestreams.Publisher; +import timber.log.Timber; + +import static android.os.Looper.getMainLooper; + +public class ExponentialBackoffFragment extends BaseFragment { + + @BindView(R.id.list_threading_log) + ListView _logList; + + private LogAdapter _adapter; + private CompositeDisposable _disposables = new CompositeDisposable(); + private List _logs; + Unbinder unbinder; + + @Override + public View onCreateView( + LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) { + View layout = inflater.inflate(R.layout.fragment_exponential_backoff, container, false); + unbinder = ButterKnife.bind(this, layout); + return layout; + } + + @Override + public void onActivityCreated(@Nullable Bundle savedInstanceState) { + super.onActivityCreated(savedInstanceState); + _setupLogger(); + } + + @Override + public void onPause() { + super.onPause(); + + _disposables.clear(); + } + + @Override + public void onDestroyView() { + super.onDestroyView(); + unbinder.unbind(); + } + + // ----------------------------------------------------------------------------------- + + @OnClick(R.id.btn_eb_retry) + public void startRetryingWithExponentialBackoffStrategy() { + _logs = new ArrayList<>(); + _adapter.clear(); + + DisposableSubscriber disposableSubscriber = + new DisposableSubscriber() { + @Override + public void onNext(Object aVoid) { + Timber.d("on Next"); + } + + @Override + public void onComplete() { + Timber.d("on Completed"); + } + + @Override + public void onError(Throwable e) { + _log("Error: I give up!"); + } + }; + + Flowable.error(new RuntimeException("testing")) // always fails + .retryWhen(new RetryWithDelay(5, 1000)) // notice this is called only onError (onNext + // values sent are ignored) + .doOnSubscribe(subscription -> _log("Attempting the impossible 5 times in intervals of 1s")) + .subscribe(disposableSubscriber); + + _disposables.add(disposableSubscriber); + } + + @OnClick(R.id.btn_eb_delay) + public void startExecutingWithExponentialBackoffDelay() { + + _logs = new ArrayList<>(); + _adapter.clear(); + + DisposableSubscriber disposableSubscriber = + new DisposableSubscriber() { + @Override + public void onNext(Integer integer) { + Timber.d("executing Task %d [xx:%02d]", integer, _getSecondHand()); + _log(String.format("executing Task %d [xx:%02d]", integer, _getSecondHand())); + } + + @Override + public void onError(Throwable e) { + Timber.d(e, "arrrr. Error"); + _log("Error"); + } + + @Override + public void onComplete() { + Timber.d("onCompleted"); + _log("Completed"); + } + }; + + Flowable.range(1, 4) + .delay( + integer -> { + // Rx-y way of doing the Fibonnaci :P + return MathFlowable.sumInt(Flowable.range(1, integer)) + .flatMap( + targetSecondDelay -> + Flowable.just(integer).delay(targetSecondDelay, TimeUnit.SECONDS)); + }) + .doOnSubscribe( + s -> + _log( + String.format( + "Execute 4 tasks with delay - time now: [xx:%02d]", _getSecondHand()))) + .subscribe(disposableSubscriber); + + _disposables.add(disposableSubscriber); + } + + // ----------------------------------------------------------------------------------- + + private int _getSecondHand() { + long millis = System.currentTimeMillis(); + return (int) + (TimeUnit.MILLISECONDS.toSeconds(millis) + - TimeUnit.MINUTES.toSeconds(TimeUnit.MILLISECONDS.toMinutes(millis))); + } + + // ----------------------------------------------------------------------------------- + + private void _setupLogger() { + _logs = new ArrayList<>(); + _adapter = new LogAdapter(getActivity(), new ArrayList<>()); + _logList.setAdapter(_adapter); + } + + private void _log(String logMsg) { + _logs.add(logMsg); + + // You can only do below stuff on main thread. + new Handler(getMainLooper()) + .post( + () -> { + _adapter.clear(); + _adapter.addAll(_logs); + }); + } + + // ----------------------------------------------------------------------------------- + + // CAUTION: + // -------------------------------------- + // THIS notificationHandler class HAS NO BUSINESS BEING non-static + // I ONLY did this cause i wanted access to the `_log` method from inside here + // for the purpose of demonstration. In the real world, make it static and LET IT BE!! + + // It's 12am in the morning and i feel lazy dammit !!! + + //public static class RetryWithDelay + public class RetryWithDelay implements Function, Publisher> { + + private final int _maxRetries; + private final int _retryDelayMillis; + private int _retryCount; + + public RetryWithDelay(final int maxRetries, final int retryDelayMillis) { + _maxRetries = maxRetries; + _retryDelayMillis = retryDelayMillis; + _retryCount = 0; + } + + // this is a notificationhandler, all that is cared about here + // is the emission "type" not emission "content" + // only onNext triggers a re-subscription (onError + onComplete kills it) + + @Override + public Publisher apply(Flowable inputObservable) { + + // it is critical to use inputObservable in the chain for the result + // ignoring it and doing your own thing will break the sequence + + return inputObservable.flatMap( + new Function>() { + @Override + public Publisher apply(Throwable throwable) { + if (++_retryCount < _maxRetries) { + + // When this Observable calls onNext, the original + // Observable will be retried (i.e. re-subscribed) + + Timber.d("Retrying in %d ms", _retryCount * _retryDelayMillis); + _log(String.format("Retrying in %d ms", _retryCount * _retryDelayMillis)); + + return Flowable.timer(_retryCount * _retryDelayMillis, TimeUnit.MILLISECONDS); + } + + Timber.d("Argh! i give up"); + + // Max retries hit. Pass an error so the chain is forcibly completed + // only onNext triggers a re-subscription (onError + onComplete kills it) + return Flowable.error(throwable); + } + }); + } + } +} diff --git a/app/src/main/java/com/morihacky/android/rxjava/fragments/FormValidationCombineLatestFragment.java b/app/src/main/java/com/morihacky/android/rxjava/fragments/FormValidationCombineLatestFragment.java new file mode 100644 index 00000000..efc4c2f8 --- /dev/null +++ b/app/src/main/java/com/morihacky/android/rxjava/fragments/FormValidationCombineLatestFragment.java @@ -0,0 +1,123 @@ +package com.morihacky.android.rxjava.fragments; + +import static android.text.TextUtils.isEmpty; +import static android.util.Patterns.EMAIL_ADDRESS; + +import android.os.Bundle; +import android.support.annotation.Nullable; +import android.support.v4.content.ContextCompat; +import android.view.LayoutInflater; +import android.view.View; +import android.view.ViewGroup; +import android.widget.EditText; +import android.widget.TextView; +import butterknife.BindView; +import butterknife.ButterKnife; +import butterknife.Unbinder; +import com.jakewharton.rxbinding2.widget.RxTextView; +import com.morihacky.android.rxjava.R; +import io.reactivex.BackpressureStrategy; +import io.reactivex.Flowable; +import io.reactivex.subscribers.DisposableSubscriber; +import timber.log.Timber; + +public class FormValidationCombineLatestFragment extends BaseFragment { + + @BindView(R.id.btn_demo_form_valid) + TextView _btnValidIndicator; + + @BindView(R.id.demo_combl_email) + EditText _email; + + @BindView(R.id.demo_combl_password) + EditText _password; + + @BindView(R.id.demo_combl_num) + EditText _number; + + private DisposableSubscriber _disposableObserver = null; + private Flowable _emailChangeObservable; + private Flowable _numberChangeObservable; + private Flowable _passwordChangeObservable; + private Unbinder unbinder; + + @Override + public View onCreateView( + LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) { + View layout = inflater.inflate(R.layout.fragment_form_validation_comb_latest, container, false); + unbinder = ButterKnife.bind(this, layout); + + _emailChangeObservable = + RxTextView.textChanges(_email).skip(1).toFlowable(BackpressureStrategy.LATEST); + _passwordChangeObservable = + RxTextView.textChanges(_password).skip(1).toFlowable(BackpressureStrategy.LATEST); + _numberChangeObservable = + RxTextView.textChanges(_number).skip(1).toFlowable(BackpressureStrategy.LATEST); + + _combineLatestEvents(); + + return layout; + } + + @Override + public void onDestroyView() { + super.onDestroyView(); + unbinder.unbind(); + _disposableObserver.dispose(); + } + + private void _combineLatestEvents() { + + _disposableObserver = + new DisposableSubscriber() { + @Override + public void onNext(Boolean formValid) { + if (formValid) { + _btnValidIndicator.setBackgroundColor( + ContextCompat.getColor(getContext(), R.color.blue)); + } else { + _btnValidIndicator.setBackgroundColor( + ContextCompat.getColor(getContext(), R.color.gray)); + } + } + + @Override + public void onError(Throwable e) { + Timber.e(e, "there was an error"); + } + + @Override + public void onComplete() { + Timber.d("completed"); + } + }; + + Flowable.combineLatest( + _emailChangeObservable, + _passwordChangeObservable, + _numberChangeObservable, + (newEmail, newPassword, newNumber) -> { + boolean emailValid = !isEmpty(newEmail) && EMAIL_ADDRESS.matcher(newEmail).matches(); + if (!emailValid) { + _email.setError("Invalid Email!"); + } + + boolean passValid = !isEmpty(newPassword) && newPassword.length() > 8; + if (!passValid) { + _password.setError("Invalid Password!"); + } + + boolean numValid = !isEmpty(newNumber); + if (numValid) { + int num = Integer.parseInt(newNumber.toString()); + numValid = num > 0 && num <= 100; + } + if (!numValid) { + _number.setError("Invalid Number!"); + } + + return emailValid && passValid && numValid; + }) + .subscribe(_disposableObserver); + } +} diff --git a/app/src/main/java/com/morihacky/android/rxjava/fragments/MainFragment.java b/app/src/main/java/com/morihacky/android/rxjava/fragments/MainFragment.java new file mode 100644 index 00000000..75f68fa2 --- /dev/null +++ b/app/src/main/java/com/morihacky/android/rxjava/fragments/MainFragment.java @@ -0,0 +1,139 @@ +package com.morihacky.android.rxjava.fragments; + +import android.os.Bundle; +import android.support.annotation.NonNull; +import android.support.annotation.Nullable; +import android.support.v4.app.Fragment; +import android.view.LayoutInflater; +import android.view.View; +import android.view.ViewGroup; +import butterknife.ButterKnife; +import butterknife.OnClick; +import butterknife.Unbinder; + +import com.morihacky.android.rxjava.R; +import com.morihacky.android.rxjava.pagination.PaginationAutoFragment; +import com.morihacky.android.rxjava.rxbus.RxBusDemoFragment; +import com.morihacky.android.rxjava.volley.VolleyDemoFragment; + +public class MainFragment extends BaseFragment { + + private Unbinder unbinder; + + @Override + public View onCreateView( + LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) { + View layout = inflater.inflate(R.layout.fragment_main, container, false); + unbinder = ButterKnife.bind(this, layout); + return layout; + } + + @Override + public void onDestroyView() { + super.onDestroyView(); + unbinder.unbind(); + } + + @OnClick(R.id.btn_demo_schedulers) + void demoConcurrencyWithSchedulers() { + clickedOn(new ConcurrencyWithSchedulersDemoFragment()); + } + + @OnClick(R.id.btn_demo_buffer) + void demoBuffer() { + clickedOn(new BufferDemoFragment()); + } + + @OnClick(R.id.btn_demo_debounce) + void demoThrottling() { + clickedOn(new DebounceSearchEmitterFragment()); + } + + @OnClick(R.id.btn_demo_retrofit) + void demoRetrofitCalls() { + clickedOn(new RetrofitFragment()); + } + + @OnClick(R.id.btn_demo_polling) + void demoPolling() { + clickedOn(new PollingFragment()); + } + + @OnClick(R.id.btn_demo_double_binding_textview) + void demoDoubleBindingWithPublishSubject() { + clickedOn(new DoubleBindingTextViewFragment()); + } + + @OnClick(R.id.btn_demo_rxbus) + void demoRxBus() { + clickedOn(new RxBusDemoFragment()); + } + + @OnClick(R.id.btn_demo_form_validation_combinel) + void formValidation() { + clickedOn(new FormValidationCombineLatestFragment()); + } + + @OnClick(R.id.btn_demo_pseudo_cache) + void pseudoCacheDemo() { + clickedOn(new PseudoCacheFragment()); + } + + @OnClick(R.id.btn_demo_timing) + void demoTimerIntervalDelays() { + clickedOn(new TimingDemoFragment()); + } + + @OnClick(R.id.btn_demo_timeout) + void demoTimeout() { + clickedOn(new TimeoutDemoFragment()); + } + + @OnClick(R.id.btn_demo_exponential_backoff) + void demoExponentialBackoff() { + clickedOn(new ExponentialBackoffFragment()); + } + + @OnClick(R.id.btn_demo_rotation_persist) + void demoRotationPersist() { + clickedOn(new RotationPersist3Fragment()); + // clickedOn(new RotationPersist2Fragment()); + // clickedOn(new RotationPersist1Fragment()); + } + + @OnClick(R.id.btn_demo_pagination) + void demoPaging() { + clickedOn(new PaginationAutoFragment()); + //clickedOn(new PaginationFragment()); + } + + @OnClick(R.id.btn_demo_volley) + void demoVolleyRequest() { + clickedOn(new VolleyDemoFragment()); + } + + @OnClick(R.id.btn_demo_networkDetector) + void demoNetworkDetector() { + clickedOn(new NetworkDetectorFragment()); + } + + @OnClick(R.id.btn_demo_using) + void demoUsing() { + clickedOn(new UsingFragment()); + } + + @OnClick(R.id.btn_demo_multicastPlayground) + void demoMulticastPlayground() { + clickedOn(new MulticastPlaygroundFragment()); + } + + private void clickedOn(@NonNull Fragment fragment) { + final String tag = fragment.getClass().toString(); + getActivity() + .getSupportFragmentManager() + .beginTransaction() + .addToBackStack(tag) + .replace(android.R.id.content, fragment, tag) + .commit(); + } +} diff --git a/app/src/main/java/com/morihacky/android/rxjava/fragments/NetworkDetectorFragment.java b/app/src/main/java/com/morihacky/android/rxjava/fragments/NetworkDetectorFragment.java new file mode 100644 index 00000000..af1392d4 --- /dev/null +++ b/app/src/main/java/com/morihacky/android/rxjava/fragments/NetworkDetectorFragment.java @@ -0,0 +1,151 @@ +package com.morihacky.android.rxjava.fragments; + +import android.content.BroadcastReceiver; +import android.content.Context; +import android.content.Intent; +import android.content.IntentFilter; +import android.net.ConnectivityManager; +import android.net.NetworkInfo; +import android.os.Bundle; +import android.os.Handler; +import android.os.Looper; +import android.support.annotation.Nullable; +import android.view.LayoutInflater; +import android.view.View; +import android.view.ViewGroup; +import android.widget.ArrayAdapter; +import android.widget.ListView; +import butterknife.BindView; +import butterknife.ButterKnife; +import com.morihacky.android.rxjava.R; + +import butterknife.Unbinder; +import io.reactivex.android.schedulers.AndroidSchedulers; +import io.reactivex.disposables.Disposable; +import io.reactivex.processors.PublishProcessor; +import java.util.ArrayList; +import java.util.List; + +public class NetworkDetectorFragment extends BaseFragment { + + @BindView(R.id.list_threading_log) + ListView logsList; + + private LogAdapter adapter; + private BroadcastReceiver broadcastReceiver; + private List logs; + private Disposable disposable; + private PublishProcessor publishProcessor; + private Unbinder unbinder; + + @Override + public void onDestroy() { + super.onDestroy(); + unbinder.unbind(); + } + + @Override + public View onCreateView( + LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) { + View layout = inflater.inflate(R.layout.fragment_network_detector, container, false); + unbinder = ButterKnife.bind(this, layout); + return layout; + } + + @Override + public void onActivityCreated(@Nullable Bundle savedInstanceState) { + super.onActivityCreated(savedInstanceState); + setupLogger(); + } + + @Override + public void onStart() { + super.onStart(); + + publishProcessor = PublishProcessor.create(); + + disposable = + publishProcessor + .startWith(getConnectivityStatus(getActivity())) + .distinctUntilChanged() + .observeOn(AndroidSchedulers.mainThread()) + .subscribe( + online -> { + if (online) { + log("You are online"); + } else { + log("You are offline"); + } + }); + + listenToNetworkConnectivity(); + } + + @Override + public void onStop() { + super.onStop(); + + disposable.dispose(); + getActivity().unregisterReceiver(broadcastReceiver); + } + + private void listenToNetworkConnectivity() { + + broadcastReceiver = + new BroadcastReceiver() { + @Override + public void onReceive(Context context, Intent intent) { + publishProcessor.onNext(getConnectivityStatus(context)); + } + }; + + final IntentFilter intentFilter = new IntentFilter(ConnectivityManager.CONNECTIVITY_ACTION); + getActivity().registerReceiver(broadcastReceiver, intentFilter); + } + + private boolean getConnectivityStatus(Context context) { + ConnectivityManager cm = + (ConnectivityManager) context.getSystemService(Context.CONNECTIVITY_SERVICE); + NetworkInfo networkInfo = cm.getActiveNetworkInfo(); + return networkInfo != null && networkInfo.isConnected(); + } + + // ----------------------------------------------------------------------------------- + // Method that help wiring up the example (irrelevant to RxJava) + + private void log(String logMsg) { + + if (isCurrentlyOnMainThread()) { + logs.add(0, logMsg + " (main thread) "); + adapter.clear(); + adapter.addAll(logs); + } else { + logs.add(0, logMsg + " (NOT main thread) "); + + // You can only do below stuff on main thread. + new Handler(Looper.getMainLooper()) + .post( + () -> { + adapter.clear(); + adapter.addAll(logs); + }); + } + } + + private void setupLogger() { + logs = new ArrayList<>(); + adapter = new LogAdapter(getActivity(), new ArrayList<>()); + logsList.setAdapter(adapter); + } + + private boolean isCurrentlyOnMainThread() { + return Looper.myLooper() == Looper.getMainLooper(); + } + + private class LogAdapter extends ArrayAdapter { + + public LogAdapter(Context context, List logs) { + super(context, R.layout.item_log, R.id.item_log, logs); + } + } +} diff --git a/app/src/main/java/com/morihacky/android/rxjava/fragments/PollingFragment.java b/app/src/main/java/com/morihacky/android/rxjava/fragments/PollingFragment.java new file mode 100644 index 00000000..5eb8b187 --- /dev/null +++ b/app/src/main/java/com/morihacky/android/rxjava/fragments/PollingFragment.java @@ -0,0 +1,237 @@ +package com.morihacky.android.rxjava.fragments; + +import android.content.Context; +import android.os.Bundle; +import android.os.Handler; +import android.os.Looper; +import android.support.annotation.Nullable; +import android.view.LayoutInflater; +import android.view.View; +import android.view.ViewGroup; +import android.widget.ArrayAdapter; +import android.widget.ListView; +import butterknife.BindView; +import butterknife.ButterKnife; +import butterknife.OnClick; +import com.morihacky.android.rxjava.R; + +import butterknife.Unbinder; +import io.reactivex.Flowable; +import io.reactivex.disposables.CompositeDisposable; +import io.reactivex.disposables.Disposable; +import io.reactivex.functions.Function; +import java.util.ArrayList; +import java.util.List; +import java.util.Locale; +import java.util.concurrent.TimeUnit; +import org.reactivestreams.Publisher; +import timber.log.Timber; + +public class PollingFragment extends BaseFragment { + + private static final int INITIAL_DELAY = 0; + private static final int POLLING_INTERVAL = 1000; + private static final int POLL_COUNT = 8; + + @BindView(R.id.list_threading_log) + ListView _logsList; + + private LogAdapter _adapter; + private int _counter = 0; + private CompositeDisposable _disposables; + private List _logs; + private Unbinder unbinder; + + @Override + public void onCreate(@Nullable Bundle savedInstanceState) { + super.onCreate(savedInstanceState); + + _disposables = new CompositeDisposable(); + } + + @Override + public View onCreateView( + LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) { + View layout = inflater.inflate(R.layout.fragment_polling, container, false); + unbinder = ButterKnife.bind(this, layout); + return layout; + } + + @Override + public void onActivityCreated(@Nullable Bundle savedInstanceState) { + super.onActivityCreated(savedInstanceState); + _setupLogger(); + } + + @Override + public void onDestroy() { + super.onDestroy(); + _disposables.clear(); + unbinder.unbind(); + } + + @OnClick(R.id.btn_start_simple_polling) + public void onStartSimplePollingClicked() { + + final int pollCount = POLL_COUNT; + + Disposable d = + Flowable.interval(INITIAL_DELAY, POLLING_INTERVAL, TimeUnit.MILLISECONDS) + .map(this::_doNetworkCallAndGetStringResult) + .take(pollCount) + .doOnSubscribe( + subscription -> { + _log(String.format("Start simple polling - %s", _counter)); + }) + .subscribe( + taskName -> { + _log( + String.format( + Locale.US, + "Executing polled task [%s] now time : [xx:%02d]", + taskName, + _getSecondHand())); + }); + + _disposables.add(d); + } + + @OnClick(R.id.btn_start_increasingly_delayed_polling) + public void onStartIncreasinglyDelayedPolling() { + _setupLogger(); + + final int pollingInterval = POLLING_INTERVAL; + final int pollCount = POLL_COUNT; + + _log( + String.format( + Locale.US, "Start increasingly delayed polling now time: [xx:%02d]", _getSecondHand())); + + _disposables.add( + Flowable.just(1L) + .repeatWhen(new RepeatWithDelay(pollCount, pollingInterval)) + .subscribe( + o -> + _log( + String.format( + Locale.US, + "Executing polled task now time : [xx:%02d]", + _getSecondHand())), + e -> Timber.d(e, "arrrr. Error"))); + } + + // ----------------------------------------------------------------------------------- + + // CAUTION: + // -------------------------------------- + // THIS notificationHandler class HAS NO BUSINESS BEING non-static + // I ONLY did this cause i wanted access to the `_log` method from inside here + // for the purpose of demonstration. In the real world, make it static and LET IT BE!! + + // It's 12am in the morning and i feel lazy dammit !!! + + private String _doNetworkCallAndGetStringResult(long attempt) { + try { + if (attempt == 4) { + // randomly make one event super long so we test that the repeat logic waits + // and accounts for this. + Thread.sleep(9000); + } else { + Thread.sleep(3000); + } + + } catch (InterruptedException e) { + Timber.d("Operation was interrupted"); + } + _counter++; + + return String.valueOf(_counter); + } + + // ----------------------------------------------------------------------------------- + // Method that help wiring up the example (irrelevant to RxJava) + + private int _getSecondHand() { + long millis = System.currentTimeMillis(); + return (int) + (TimeUnit.MILLISECONDS.toSeconds(millis) + - TimeUnit.MINUTES.toSeconds(TimeUnit.MILLISECONDS.toMinutes(millis))); + } + + private void _log(String logMsg) { + if (_isCurrentlyOnMainThread()) { + _logs.add(0, logMsg + " (main thread) "); + _adapter.clear(); + _adapter.addAll(_logs); + } else { + _logs.add(0, logMsg + " (NOT main thread) "); + + // You can only do below stuff on main thread. + new Handler(Looper.getMainLooper()) + .post( + () -> { + _adapter.clear(); + _adapter.addAll(_logs); + }); + } + } + + private void _setupLogger() { + _logs = new ArrayList<>(); + _adapter = new LogAdapter(getActivity(), new ArrayList<>()); + _logsList.setAdapter(_adapter); + _counter = 0; + } + + private boolean _isCurrentlyOnMainThread() { + return Looper.myLooper() == Looper.getMainLooper(); + } + + //public static class RepeatWithDelay + public class RepeatWithDelay implements Function, Publisher> { + + private final int _repeatLimit; + private final int _pollingInterval; + private int _repeatCount = 1; + + RepeatWithDelay(int repeatLimit, int pollingInterval) { + _pollingInterval = pollingInterval; + _repeatLimit = repeatLimit; + } + + // this is a notificationhandler, all we care about is + // the emission "type" not emission "content" + // only onNext triggers a re-subscription + + @Override + public Publisher apply(Flowable inputFlowable) throws Exception { + // it is critical to use inputObservable in the chain for the result + // ignoring it and doing your own thing will break the sequence + + return inputFlowable.flatMap( + new Function>() { + @Override + public Publisher apply(Object o) throws Exception { + if (_repeatCount >= _repeatLimit) { + // terminate the sequence cause we reached the limit + _log("Completing sequence"); + return Flowable.empty(); + } + + // since we don't get an input + // we store state in this handler to tell us the point of time we're firing + _repeatCount++; + + return Flowable.timer(_repeatCount * _pollingInterval, TimeUnit.MILLISECONDS); + } + }); + } + } + + private class LogAdapter extends ArrayAdapter { + + public LogAdapter(Context context, List logs) { + super(context, R.layout.item_log, R.id.item_log, logs); + } + } +} diff --git a/app/src/main/java/com/morihacky/android/rxjava/fragments/PseudoCacheFragment.java b/app/src/main/java/com/morihacky/android/rxjava/fragments/PseudoCacheFragment.java new file mode 100644 index 00000000..a214ce41 --- /dev/null +++ b/app/src/main/java/com/morihacky/android/rxjava/fragments/PseudoCacheFragment.java @@ -0,0 +1,332 @@ +package com.morihacky.android.rxjava.fragments; + +import android.os.Bundle; +import android.os.Handler; +import android.os.Looper; +import android.support.annotation.Nullable; +import android.view.LayoutInflater; +import android.view.View; +import android.view.ViewGroup; +import android.widget.ArrayAdapter; +import android.widget.ListView; +import android.widget.TextView; + +import com.morihacky.android.rxjava.R; +import com.morihacky.android.rxjava.retrofit.Contributor; +import com.morihacky.android.rxjava.retrofit.GithubApi; +import com.morihacky.android.rxjava.retrofit.GithubService; + +import java.util.ArrayList; +import java.util.HashMap; +import java.util.List; +import java.util.Map; +import java.util.concurrent.TimeUnit; + +import butterknife.BindView; +import butterknife.ButterKnife; +import butterknife.OnClick; +import butterknife.Unbinder; +import io.reactivex.Observable; +import io.reactivex.android.schedulers.AndroidSchedulers; +import io.reactivex.observers.DisposableObserver; +import io.reactivex.schedulers.Schedulers; +import timber.log.Timber; + +public class PseudoCacheFragment extends BaseFragment { + + @BindView(R.id.info_pseudoCache_demo) + TextView infoText; + + @BindView(R.id.info_pseudoCache_listSubscription) + ListView listSubscriptionInfo; + + @BindView(R.id.info_pseudoCache_listDtl) + ListView listDetail; + + private ArrayAdapter adapterDetail, adapterSubscriptionInfo; + private HashMap contributionMap = null; + private Unbinder unbinder; + + @Override + public View onCreateView( + LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) { + View layout = inflater.inflate(R.layout.fragment_pseudo_cache, container, false); + unbinder = ButterKnife.bind(this, layout); + return layout; + } + + @Override + public void onDestroyView() { + super.onDestroyView(); + unbinder.unbind(); + } + + @OnClick(R.id.btn_pseudoCache_concat) + public void onConcatBtnClicked() { + infoText.setText(R.string.msg_pseudoCache_demoInfo_concat); + wireupDemo(); + + Observable.concat(getSlowCachedDiskData(), getFreshNetworkData()) + .subscribeOn(Schedulers.io()) // we want to add a list item at time of subscription + .observeOn(AndroidSchedulers.mainThread()) + .subscribe( + new DisposableObserver() { + @Override + public void onComplete() { + Timber.d("done loading all data"); + } + + @Override + public void onError(Throwable e) { + Timber.e(e, "arr something went wrong"); + } + + @Override + public void onNext(Contributor contributor) { + contributionMap.put(contributor.login, contributor.contributions); + adapterDetail.clear(); + adapterDetail.addAll(mapAsList(contributionMap)); + } + }); + } + + @OnClick(R.id.btn_pseudoCache_concatEager) + public void onConcatEagerBtnClicked() { + infoText.setText(R.string.msg_pseudoCache_demoInfo_concatEager); + wireupDemo(); + + List> observables = new ArrayList<>(2); + observables.add(getSlowCachedDiskData()); + observables.add(getFreshNetworkData()); + + Observable.concatEager(observables) + .subscribeOn(Schedulers.io()) // we want to add a list item at time of subscription + .observeOn(AndroidSchedulers.mainThread()) + .subscribe( + new DisposableObserver() { + @Override + public void onComplete() { + Timber.d("done loading all data"); + } + + @Override + public void onError(Throwable e) { + Timber.e(e, "arr something went wrong"); + } + + @Override + public void onNext(Contributor contributor) { + contributionMap.put(contributor.login, contributor.contributions); + adapterDetail.clear(); + adapterDetail.addAll(mapAsList(contributionMap)); + } + }); + } + + @OnClick(R.id.btn_pseudoCache_merge) + public void onMergeBtnClicked() { + infoText.setText(R.string.msg_pseudoCache_demoInfo_merge); + wireupDemo(); + + Observable.merge(getCachedDiskData(), getFreshNetworkData()) + .subscribeOn(Schedulers.io()) // we want to add a list item at time of subscription + .observeOn(AndroidSchedulers.mainThread()) + .subscribe( + new DisposableObserver() { + @Override + public void onComplete() { + Timber.d("done loading all data"); + } + + @Override + public void onError(Throwable e) { + Timber.e(e, "arr something went wrong"); + } + + @Override + public void onNext(Contributor contributor) { + contributionMap.put(contributor.login, contributor.contributions); + adapterDetail.clear(); + adapterDetail.addAll(mapAsList(contributionMap)); + } + }); + } + + @OnClick(R.id.btn_pseudoCache_mergeSlowDisk) + public void onMergeSlowBtnClicked() { + infoText.setText(R.string.msg_pseudoCache_demoInfo_mergeSlowDisk); + wireupDemo(); + + Observable.merge(getSlowCachedDiskData(), getFreshNetworkData()) + .subscribeOn(Schedulers.io()) // we want to add a list item at time of subscription + .observeOn(AndroidSchedulers.mainThread()) + .subscribe( + new DisposableObserver() { + @Override + public void onComplete() { + Timber.d("done loading all data"); + } + + @Override + public void onError(Throwable e) { + Timber.e(e, "arr something went wrong"); + } + + @Override + public void onNext(Contributor contributor) { + contributionMap.put(contributor.login, contributor.contributions); + adapterDetail.clear(); + adapterDetail.addAll(mapAsList(contributionMap)); + } + }); + } + + @OnClick(R.id.btn_pseudoCache_mergeOptimized) + public void onMergeOptimizedBtnClicked() { + infoText.setText(R.string.msg_pseudoCache_demoInfo_mergeOptimized); + wireupDemo(); + + getFreshNetworkData() // + .publish( + network -> // + Observable.merge( + network, // + getCachedDiskData().takeUntil(network))) + .subscribeOn(Schedulers.io()) // we want to add a list item at time of subscription + .observeOn(AndroidSchedulers.mainThread()) + .subscribe( + new DisposableObserver() { + @Override + public void onComplete() { + Timber.d("done loading all data"); + } + + @Override + public void onError(Throwable e) { + Timber.e(e, "arr something went wrong"); + } + + @Override + public void onNext(Contributor contributor) { + contributionMap.put(contributor.login, contributor.contributions); + adapterDetail.clear(); + adapterDetail.addAll(mapAsList(contributionMap)); + } + }); + } + + @OnClick(R.id.btn_pseudoCache_mergeOptimizedSlowDisk) + public void onMergeOptimizedWithSlowDiskBtnClicked() { + infoText.setText(R.string.msg_pseudoCache_demoInfo_mergeOptimizedSlowDisk); + wireupDemo(); + + getFreshNetworkData() // + .publish( + network -> // + Observable.merge( + network, // + getSlowCachedDiskData().takeUntil(network))) + .subscribeOn(Schedulers.io()) // we want to add a list item at time of subscription + .observeOn(AndroidSchedulers.mainThread()) + .subscribe( + new DisposableObserver() { + @Override + public void onComplete() { + Timber.d("done loading all data"); + } + + @Override + public void onError(Throwable e) { + Timber.e(e, "arr something went wrong"); + } + + @Override + public void onNext(Contributor contributor) { + contributionMap.put(contributor.login, contributor.contributions); + adapterDetail.clear(); + adapterDetail.addAll(mapAsList(contributionMap)); + } + }); + } + + // ----------------------------------------------------------------------------------- + // WIRING for example + + private void wireupDemo() { + contributionMap = new HashMap<>(); + + adapterDetail = + new ArrayAdapter<>( + getActivity(), R.layout.item_log_white, R.id.item_log, new ArrayList<>()); + listDetail.setAdapter(adapterDetail); + + adapterSubscriptionInfo = + new ArrayAdapter<>( + getActivity(), R.layout.item_log_white, R.id.item_log, new ArrayList<>()); + listSubscriptionInfo.setAdapter(adapterSubscriptionInfo); + } + + private Observable getSlowCachedDiskData() { + return Observable.timer(1, TimeUnit.SECONDS).flatMap(dummy -> getCachedDiskData()); + } + + private Observable getCachedDiskData() { + List list = new ArrayList<>(); + Map map = dummyDiskData(); + + for (String username : map.keySet()) { + Contributor c = new Contributor(); + c.login = username; + c.contributions = map.get(username); + list.add(c); + } + + return Observable.fromIterable(list) // + .doOnSubscribe( + (data) -> + new Handler(Looper.getMainLooper()) // + .post(() -> adapterSubscriptionInfo.add("(disk) cache subscribed"))) // + .doOnComplete( + () -> + new Handler(Looper.getMainLooper()) // + .post(() -> adapterSubscriptionInfo.add("(disk) cache completed"))); + } + + private Observable getFreshNetworkData() { + String githubToken = getResources().getString(R.string.github_oauth_token); + GithubApi githubService = GithubService.createGithubService(githubToken); + + return githubService + .contributors("square", "retrofit") + .flatMap(Observable::fromIterable) + .doOnSubscribe( + (data) -> + new Handler(Looper.getMainLooper()) // + .post(() -> adapterSubscriptionInfo.add("(network) subscribed"))) // + .doOnComplete( + () -> + new Handler(Looper.getMainLooper()) // + .post(() -> adapterSubscriptionInfo.add("(network) completed"))); + } + + private List mapAsList(HashMap map) { + List list = new ArrayList<>(); + + for (String username : map.keySet()) { + String rowLog = String.format("%s [%d]", username, contributionMap.get(username)); + list.add(rowLog); + } + + return list; + } + + private Map dummyDiskData() { + Map map = new HashMap<>(); + map.put("JakeWharton", 0L); + map.put("pforhan", 0L); + map.put("edenman", 0L); + map.put("swankjesse", 0L); + map.put("bruceLee", 0L); + return map; + } +} diff --git a/app/src/main/java/com/morihacky/android/rxjava/fragments/PseudoCacheMergeFragment.java b/app/src/main/java/com/morihacky/android/rxjava/fragments/PseudoCacheMergeFragment.java new file mode 100644 index 00000000..3871437d --- /dev/null +++ b/app/src/main/java/com/morihacky/android/rxjava/fragments/PseudoCacheMergeFragment.java @@ -0,0 +1,144 @@ +package com.morihacky.android.rxjava.fragments; + +import android.os.Bundle; +import android.support.annotation.Nullable; +import android.util.Pair; +import android.view.LayoutInflater; +import android.view.View; +import android.view.ViewGroup; +import android.widget.ArrayAdapter; +import android.widget.ListView; + +import com.morihacky.android.rxjava.R; +import com.morihacky.android.rxjava.retrofit.Contributor; +import com.morihacky.android.rxjava.retrofit.GithubApi; +import com.morihacky.android.rxjava.retrofit.GithubService; + +import java.util.ArrayList; +import java.util.HashMap; +import java.util.List; + +import butterknife.BindView; +import butterknife.ButterKnife; +import butterknife.OnClick; +import butterknife.Unbinder; +import io.reactivex.Observable; +import io.reactivex.android.schedulers.AndroidSchedulers; +import io.reactivex.observers.DisposableObserver; +import io.reactivex.schedulers.Schedulers; +import timber.log.Timber; + +public class PseudoCacheMergeFragment extends BaseFragment { + + @BindView(R.id.log_list) + ListView _resultList; + + private ArrayAdapter _adapter; + private HashMap _contributionMap = null; + private HashMap _resultAgeMap = new HashMap<>(); + private Unbinder unbinder; + + @Override + public View onCreateView( + LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) { + View layout = inflater.inflate(R.layout.fragment_pseudo_cache_concat, container, false); + unbinder = ButterKnife.bind(this, layout); + _initializeCache(); + return layout; + } + + @Override + public void onDestroyView() { + super.onDestroyView(); + unbinder.unbind(); + } + + @OnClick(R.id.btn_start_pseudo_cache) + public void onDemoPseudoCacheClicked() { + _adapter = + new ArrayAdapter<>(getActivity(), R.layout.item_log, R.id.item_log, new ArrayList<>()); + + _resultList.setAdapter(_adapter); + _initializeCache(); + + Observable.merge(_getCachedData(), _getFreshData()) + .subscribeOn(Schedulers.io()) + .observeOn(AndroidSchedulers.mainThread()) + .subscribe( + new DisposableObserver>() { + @Override + public void onComplete() { + Timber.d("done loading all data"); + } + + @Override + public void onError(Throwable e) { + Timber.e(e, "arr something went wrong"); + } + + @Override + public void onNext(Pair contributorAgePair) { + Contributor contributor = contributorAgePair.first; + + if (_resultAgeMap.containsKey(contributor) + && _resultAgeMap.get(contributor) > contributorAgePair.second) { + return; + } + + _contributionMap.put(contributor.login, contributor.contributions); + _resultAgeMap.put(contributor, contributorAgePair.second); + + _adapter.clear(); + _adapter.addAll(getListStringFromMap()); + } + }); + } + + private List getListStringFromMap() { + List list = new ArrayList<>(); + + for (String username : _contributionMap.keySet()) { + String rowLog = String.format("%s [%d]", username, _contributionMap.get(username)); + list.add(rowLog); + } + + return list; + } + + private Observable> _getCachedData() { + + List> list = new ArrayList<>(); + + Pair dataWithAgePair; + + for (String username : _contributionMap.keySet()) { + Contributor c = new Contributor(); + c.login = username; + c.contributions = _contributionMap.get(username); + + dataWithAgePair = new Pair<>(c, System.currentTimeMillis()); + list.add(dataWithAgePair); + } + + return Observable.fromIterable(list); + } + + private Observable> _getFreshData() { + String githubToken = getResources().getString(R.string.github_oauth_token); + GithubApi githubService = GithubService.createGithubService(githubToken); + + return githubService + .contributors("square", "retrofit") + .flatMap(Observable::fromIterable) + .map(contributor -> new Pair<>(contributor, System.currentTimeMillis())); + } + + private void _initializeCache() { + _contributionMap = new HashMap<>(); + _contributionMap.put("JakeWharton", 0l); + _contributionMap.put("pforhan", 0l); + _contributionMap.put("edenman", 0l); + _contributionMap.put("swankjesse", 0l); + _contributionMap.put("bruceLee", 0l); + } +} diff --git a/app/src/main/java/com/morihacky/android/rxjava/fragments/RetrofitAsyncTaskDeathFragment.java b/app/src/main/java/com/morihacky/android/rxjava/fragments/RetrofitAsyncTaskDeathFragment.java new file mode 100644 index 00000000..baa391ed --- /dev/null +++ b/app/src/main/java/com/morihacky/android/rxjava/fragments/RetrofitAsyncTaskDeathFragment.java @@ -0,0 +1,121 @@ +package com.morihacky.android.rxjava.fragments; + +import android.os.AsyncTask; +import android.os.Bundle; +import android.support.annotation.Nullable; +import android.support.v4.app.Fragment; +import android.view.LayoutInflater; +import android.view.View; +import android.view.ViewGroup; +import android.widget.ArrayAdapter; +import android.widget.EditText; +import android.widget.ListView; + +import com.morihacky.android.rxjava.R; +import com.morihacky.android.rxjava.retrofit.GithubApi; +import com.morihacky.android.rxjava.retrofit.GithubService; +import com.morihacky.android.rxjava.retrofit.User; + +import java.util.ArrayList; + +import butterknife.BindView; +import butterknife.ButterKnife; +import butterknife.OnClick; +import butterknife.Unbinder; +import io.reactivex.android.schedulers.AndroidSchedulers; +import io.reactivex.observers.DisposableObserver; +import io.reactivex.schedulers.Schedulers; + +import static java.lang.String.format; + +public class RetrofitAsyncTaskDeathFragment extends Fragment { + + @BindView(R.id.btn_demo_retrofit_async_death_username) + EditText _username; + + @BindView(R.id.log_list) + ListView _resultList; + + private GithubApi _githubService; + private ArrayAdapter _adapter; + private Unbinder unbinder; + + @Override + public void onCreate(Bundle savedInstanceState) { + super.onCreate(savedInstanceState); + + String githubToken = getResources().getString(R.string.github_oauth_token); + _githubService = GithubService.createGithubService(githubToken); + } + + @Override + public View onCreateView( + LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) { + + View layout = inflater.inflate(R.layout.fragment_retrofit_async_task_death, container, false); + unbinder = ButterKnife.bind(this, layout); + + _adapter = + new ArrayAdapter<>(getActivity(), R.layout.item_log, R.id.item_log, new ArrayList<>()); + //_adapter.setNotifyOnChange(true); + _resultList.setAdapter(_adapter); + + return layout; + } + + @Override + public void onDestroyView() { + super.onDestroyView(); + unbinder.unbind(); + } + + @OnClick(R.id.btn_demo_retrofit_async_death) + public void onGetGithubUserClicked() { + _adapter.clear(); + + /*new AsyncTask() { + @Override + protected User doInBackground(String... params) { + return _githubService.getUser(params[0]); + } + + @Override + protected void onPostExecute(User user) { + _adapter.add(format("%s = [%s: %s]", _username.getText(), user.name, user.email)); + } + }.execute(_username.getText().toString());*/ + + _githubService + .user(_username.getText().toString()) + .subscribeOn(Schedulers.io()) + .observeOn(AndroidSchedulers.mainThread()) + .subscribe( + new DisposableObserver() { + @Override + public void onComplete() {} + + @Override + public void onError(Throwable e) {} + + @Override + public void onNext(User user) { + _adapter.add(format("%s = [%s: %s]", _username.getText(), user.name, user.email)); + } + }); + } + + // ----------------------------------------------------------------------------------- + + private class GetGithubUser extends AsyncTask { + + @Override + protected User doInBackground(String... params) { + return _githubService.getUser(params[0]); + } + + @Override + protected void onPostExecute(User user) { + _adapter.add(format("%s = [%s: %s]", _username.getText(), user.name, user.email)); + } + } +} diff --git a/app/src/main/java/com/morihacky/android/rxjava/fragments/RetrofitFragment.java b/app/src/main/java/com/morihacky/android/rxjava/fragments/RetrofitFragment.java new file mode 100644 index 00000000..0626e5b0 --- /dev/null +++ b/app/src/main/java/com/morihacky/android/rxjava/fragments/RetrofitFragment.java @@ -0,0 +1,184 @@ +package com.morihacky.android.rxjava.fragments; + +import android.os.Bundle; +import android.support.annotation.Nullable; +import android.support.v4.app.Fragment; +import android.util.Pair; +import android.view.LayoutInflater; +import android.view.View; +import android.view.ViewGroup; +import android.widget.ArrayAdapter; +import android.widget.EditText; +import android.widget.ListView; + +import com.morihacky.android.rxjava.R; +import com.morihacky.android.rxjava.retrofit.Contributor; +import com.morihacky.android.rxjava.retrofit.GithubApi; +import com.morihacky.android.rxjava.retrofit.GithubService; +import com.morihacky.android.rxjava.retrofit.User; + +import java.util.ArrayList; +import java.util.List; + +import butterknife.BindView; +import butterknife.ButterKnife; +import butterknife.OnClick; +import butterknife.Unbinder; +import io.reactivex.Observable; +import io.reactivex.android.schedulers.AndroidSchedulers; +import io.reactivex.disposables.CompositeDisposable; +import io.reactivex.observers.DisposableObserver; +import io.reactivex.schedulers.Schedulers; +import timber.log.Timber; + +import static android.text.TextUtils.isEmpty; +import static java.lang.String.format; + +public class RetrofitFragment extends Fragment { + + @BindView(R.id.demo_retrofit_contributors_username) + EditText _username; + + @BindView(R.id.demo_retrofit_contributors_repository) + EditText _repo; + + @BindView(R.id.log_list) + ListView _resultList; + + private ArrayAdapter _adapter; + private GithubApi _githubService; + private CompositeDisposable _disposables; + private Unbinder unbinder; + + @Override + public void onCreate(Bundle savedInstanceState) { + super.onCreate(savedInstanceState); + String githubToken = getResources().getString(R.string.github_oauth_token); + _githubService = GithubService.createGithubService(githubToken); + + _disposables = new CompositeDisposable(); + } + + @Override + public View onCreateView( + LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) { + + View layout = inflater.inflate(R.layout.fragment_retrofit, container, false); + unbinder = ButterKnife.bind(this, layout); + + _adapter = + new ArrayAdapter<>(getActivity(), R.layout.item_log, R.id.item_log, new ArrayList<>()); + //_adapter.setNotifyOnChange(true); + _resultList.setAdapter(_adapter); + + return layout; + } + + @Override + public void onDestroyView() { + super.onDestroyView(); + unbinder.unbind(); + } + + @Override + public void onDestroy() { + super.onDestroy(); + _disposables.dispose(); + } + + @OnClick(R.id.btn_demo_retrofit_contributors) + public void onListContributorsClicked() { + _adapter.clear(); + + _disposables.add( // + _githubService + .contributors(_username.getText().toString(), _repo.getText().toString()) + .subscribeOn(Schedulers.io()) + .observeOn(AndroidSchedulers.mainThread()) + .subscribeWith( + new DisposableObserver>() { + + @Override + public void onComplete() { + Timber.d("Retrofit call 1 completed"); + } + + @Override + public void onError(Throwable e) { + Timber.e(e, "woops we got an error while getting the list of contributors"); + } + + @Override + public void onNext(List contributors) { + for (Contributor c : contributors) { + _adapter.add( + format( + "%s has made %d contributions to %s", + c.login, c.contributions, _repo.getText().toString())); + + Timber.d( + "%s has made %d contributions to %s", + c.login, c.contributions, _repo.getText().toString()); + } + } + })); + } + + @OnClick(R.id.btn_demo_retrofit_contributors_with_user_info) + public void onListContributorsWithFullUserInfoClicked() { + _adapter.clear(); + + _disposables.add( + _githubService + .contributors(_username.getText().toString(), _repo.getText().toString()) + .flatMap(Observable::fromIterable) + .flatMap( + contributor -> { + Observable _userObservable = + _githubService + .user(contributor.login) + .filter(user -> !isEmpty(user.name) && !isEmpty(user.email)); + + return Observable.zip(_userObservable, Observable.just(contributor), Pair::new); + }) + .subscribeOn(Schedulers.newThread()) + .observeOn(AndroidSchedulers.mainThread()) + .subscribeWith( + new DisposableObserver>() { + @Override + public void onComplete() { + Timber.d("Retrofit call 2 completed "); + } + + @Override + public void onError(Throwable e) { + Timber.e( + e, + "error while getting the list of contributors along with full " + "names"); + } + + @Override + public void onNext(Pair pair) { + User user = pair.first; + Contributor contributor = pair.second; + + _adapter.add( + format( + "%s(%s) has made %d contributions to %s", + user.name, + user.email, + contributor.contributions, + _repo.getText().toString())); + + _adapter.notifyDataSetChanged(); + + Timber.d( + "%s(%s) has made %d contributions to %s", + user.name, + user.email, + contributor.contributions, + _repo.getText().toString()); + } + })); + } +} diff --git a/app/src/main/java/com/morihacky/android/rxjava/fragments/RotationPersist1Fragment.java b/app/src/main/java/com/morihacky/android/rxjava/fragments/RotationPersist1Fragment.java new file mode 100644 index 00000000..00882958 --- /dev/null +++ b/app/src/main/java/com/morihacky/android/rxjava/fragments/RotationPersist1Fragment.java @@ -0,0 +1,138 @@ +package com.morihacky.android.rxjava.fragments; + +import static android.os.Looper.getMainLooper; + +import android.os.Bundle; +import android.os.Handler; +import android.support.annotation.Nullable; +import android.support.v4.app.FragmentManager; +import android.view.LayoutInflater; +import android.view.View; +import android.view.ViewGroup; +import android.widget.ListView; +import butterknife.BindView; +import butterknife.ButterKnife; +import butterknife.OnClick; +import butterknife.Unbinder; +import com.morihacky.android.rxjava.R; +import com.morihacky.android.rxjava.wiring.LogAdapter; +import io.reactivex.Flowable; +import io.reactivex.disposables.CompositeDisposable; +import io.reactivex.subscribers.DisposableSubscriber; +import java.util.ArrayList; +import java.util.List; +import timber.log.Timber; + +public class RotationPersist1Fragment extends BaseFragment + implements RotationPersist1WorkerFragment.IAmYourMaster { + + public static final String TAG = RotationPersist1Fragment.class.toString(); + + @BindView(R.id.list_threading_log) + ListView _logList; + + private LogAdapter _adapter; + private List _logs; + private Unbinder unbinder; + + private CompositeDisposable _disposables = new CompositeDisposable(); + + // ----------------------------------------------------------------------------------- + + @OnClick(R.id.btn_rotate_persist) + public void startOperationFromWorkerFrag() { + _logs = new ArrayList<>(); + _adapter.clear(); + + FragmentManager fm = getActivity().getSupportFragmentManager(); + RotationPersist1WorkerFragment frag = + (RotationPersist1WorkerFragment) fm.findFragmentByTag(RotationPersist1WorkerFragment.TAG); + + if (frag == null) { + frag = new RotationPersist1WorkerFragment(); + fm.beginTransaction().add(frag, RotationPersist1WorkerFragment.TAG).commit(); + } else { + Timber.d("Worker frag already spawned"); + } + } + + @Override + public void observeResults(Flowable intsFlowable) { + + DisposableSubscriber d = + new DisposableSubscriber() { + @Override + public void onNext(Integer integer) { + _log(String.format("Worker frag spits out - %d", integer)); + } + + @Override + public void onError(Throwable e) { + Timber.e(e, "Error in worker demo frag observable"); + _log("Dang! something went wrong."); + } + + @Override + public void onComplete() { + _log("Observable is complete"); + } + }; + + intsFlowable + .doOnSubscribe( + subscription -> { + _log("Subscribing to intsObservable"); + }) + .subscribe(d); + + _disposables.add(d); + } + + // ----------------------------------------------------------------------------------- + // Boilerplate + // ----------------------------------------------------------------------------------- + + @Override + public void onActivityCreated(@Nullable Bundle savedInstanceState) { + super.onActivityCreated(savedInstanceState); + _setupLogger(); + } + + @Override + public View onCreateView( + LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) { + View layout = inflater.inflate(R.layout.fragment_rotation_persist, container, false); + unbinder = ButterKnife.bind(this, layout); + return layout; + } + + @Override + public void onPause() { + super.onPause(); + _disposables.clear(); + } + + @Override + public void onDestroyView() { + super.onDestroyView(); + unbinder.unbind(); + } + + private void _setupLogger() { + _logs = new ArrayList<>(); + _adapter = new LogAdapter(getActivity(), new ArrayList<>()); + _logList.setAdapter(_adapter); + } + + private void _log(String logMsg) { + _logs.add(0, logMsg); + + // You can only do below stuff on main thread. + new Handler(getMainLooper()) + .post( + () -> { + _adapter.clear(); + _adapter.addAll(_logs); + }); + } +} diff --git a/app/src/main/java/com/morihacky/android/rxjava/fragments/RotationPersist1WorkerFragment.java b/app/src/main/java/com/morihacky/android/rxjava/fragments/RotationPersist1WorkerFragment.java new file mode 100644 index 00000000..d16adc14 --- /dev/null +++ b/app/src/main/java/com/morihacky/android/rxjava/fragments/RotationPersist1WorkerFragment.java @@ -0,0 +1,81 @@ +package com.morihacky.android.rxjava.fragments; + +import android.content.Context; +import android.os.Bundle; +import android.support.v4.app.Fragment; +import com.morihacky.android.rxjava.MainActivity; +import io.reactivex.Flowable; +import io.reactivex.disposables.Disposable; +import io.reactivex.flowables.ConnectableFlowable; +import java.util.concurrent.TimeUnit; + +public class RotationPersist1WorkerFragment extends Fragment { + + public static final String TAG = RotationPersist1WorkerFragment.class.toString(); + + private IAmYourMaster _masterFrag; + private ConnectableFlowable _storedIntsFlowable; + private Disposable _storedIntsDisposable; + + /** + * Hold a reference to the activity -> caller fragment this way when the worker frag kicks off we + * can talk back to the master and send results + */ + @Override + public void onAttach(Context context) { + super.onAttach(context); + + _masterFrag = + (RotationPersist1Fragment) + ((MainActivity) context) + .getSupportFragmentManager() + .findFragmentByTag(RotationPersist1Fragment.TAG); + + if (_masterFrag == null) { + throw new ClassCastException("We did not find a master who can understand us :("); + } + } + + /** This method will only be called once when the retained Fragment is first created. */ + @Override + public void onCreate(Bundle savedInstanceState) { + super.onCreate(savedInstanceState); + + // Retain this fragment across configuration changes. + setRetainInstance(true); + + if (_storedIntsFlowable != null) { + return; + } + + Flowable intsObservable = + Flowable.interval(1, TimeUnit.SECONDS).map(Long::intValue).take(20); + + _storedIntsFlowable = intsObservable.publish(); + _storedIntsDisposable = _storedIntsFlowable.connect(); + } + + /** The Worker fragment has started doing it's thing */ + @Override + public void onResume() { + super.onResume(); + _masterFrag.observeResults(_storedIntsFlowable); + } + + @Override + public void onDestroy() { + super.onDestroy(); + _storedIntsDisposable.dispose(); + } + + /** Set the callback to null so we don't accidentally leak the Activity instance. */ + @Override + public void onDetach() { + super.onDetach(); + _masterFrag = null; + } + + public interface IAmYourMaster { + void observeResults(Flowable intsObservable); + } +} diff --git a/app/src/main/java/com/morihacky/android/rxjava/fragments/RotationPersist2Fragment.java b/app/src/main/java/com/morihacky/android/rxjava/fragments/RotationPersist2Fragment.java new file mode 100644 index 00000000..6e523013 --- /dev/null +++ b/app/src/main/java/com/morihacky/android/rxjava/fragments/RotationPersist2Fragment.java @@ -0,0 +1,124 @@ +package com.morihacky.android.rxjava.fragments; + +import static android.os.Looper.getMainLooper; + +import android.os.Bundle; +import android.os.Handler; +import android.support.annotation.Nullable; +import android.support.v4.app.FragmentManager; +import android.view.LayoutInflater; +import android.view.View; +import android.view.ViewGroup; +import android.widget.ListView; +import butterknife.BindView; +import butterknife.ButterKnife; +import butterknife.OnClick; +import com.morihacky.android.rxjava.R; +import com.morihacky.android.rxjava.wiring.LogAdapter; +import io.reactivex.Flowable; +import io.reactivex.disposables.CompositeDisposable; +import io.reactivex.subscribers.DisposableSubscriber; +import java.util.ArrayList; +import java.util.List; +import timber.log.Timber; + +public class RotationPersist2Fragment extends BaseFragment + implements RotationPersist2WorkerFragment.IAmYourMaster { + + public static final String TAG = RotationPersist2Fragment.class.toString(); + + @BindView(R.id.list_threading_log) + ListView _logList; + + private LogAdapter _adapter; + private List _logs; + + private CompositeDisposable _disposables = new CompositeDisposable(); + + // ----------------------------------------------------------------------------------- + + @OnClick(R.id.btn_rotate_persist) + public void startOperationFromWorkerFrag() { + _logs = new ArrayList<>(); + _adapter.clear(); + + FragmentManager fm = getActivity().getSupportFragmentManager(); + RotationPersist2WorkerFragment frag = + (RotationPersist2WorkerFragment) fm.findFragmentByTag(RotationPersist2WorkerFragment.TAG); + + if (frag == null) { + frag = new RotationPersist2WorkerFragment(); + fm.beginTransaction().add(frag, RotationPersist2WorkerFragment.TAG).commit(); + } else { + Timber.d("Worker frag already spawned"); + } + } + + @Override + public void setStream(Flowable intStream) { + DisposableSubscriber d = + new DisposableSubscriber() { + @Override + public void onNext(Integer integer) { + _log(String.format("Worker frag spits out - %d", integer)); + } + + @Override + public void onError(Throwable e) { + Timber.e(e, "Error in worker demo frag observable"); + _log("Dang! something went wrong."); + } + + @Override + public void onComplete() { + _log("Observable is complete"); + } + }; + + intStream.doOnSubscribe(subscription -> _log("Subscribing to intsObservable")).subscribe(d); + + _disposables.add(d); + } + + // ----------------------------------------------------------------------------------- + // Boilerplate + // ----------------------------------------------------------------------------------- + + @Override + public void onActivityCreated(@Nullable Bundle savedInstanceState) { + super.onActivityCreated(savedInstanceState); + _setupLogger(); + } + + @Override + public View onCreateView( + LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) { + View layout = inflater.inflate(R.layout.fragment_rotation_persist, container, false); + ButterKnife.bind(this, layout); + return layout; + } + + @Override + public void onPause() { + super.onPause(); + _disposables.clear(); + } + + private void _setupLogger() { + _logs = new ArrayList<>(); + _adapter = new LogAdapter(getActivity(), new ArrayList<>()); + _logList.setAdapter(_adapter); + } + + private void _log(String logMsg) { + _logs.add(0, logMsg); + + // You can only do below stuff on main thread. + new Handler(getMainLooper()) + .post( + () -> { + _adapter.clear(); + _adapter.addAll(_logs); + }); + } +} diff --git a/app/src/main/java/com/morihacky/android/rxjava/fragments/RotationPersist2WorkerFragment.java b/app/src/main/java/com/morihacky/android/rxjava/fragments/RotationPersist2WorkerFragment.java new file mode 100644 index 00000000..cdbe6cd3 --- /dev/null +++ b/app/src/main/java/com/morihacky/android/rxjava/fragments/RotationPersist2WorkerFragment.java @@ -0,0 +1,80 @@ +package com.morihacky.android.rxjava.fragments; + +import android.content.Context; +import android.os.Bundle; +import android.support.v4.app.Fragment; +import com.morihacky.android.rxjava.MainActivity; +import io.reactivex.Flowable; +import io.reactivex.processors.PublishProcessor; +import java.util.concurrent.TimeUnit; + +public class RotationPersist2WorkerFragment extends Fragment { + + public static final String TAG = RotationPersist2WorkerFragment.class.toString(); + + private PublishProcessor _intStream; + private PublishProcessor _lifeCycleStream; + + private IAmYourMaster _masterFrag; + + /** + * Since we're holding a reference to the Master a.k.a Activity/Master Frag remember to explicitly + * remove the worker fragment or you'll have a mem leak in your hands. + * + *

See {@link MainActivity#onBackPressed()} + */ + @Override + public void onAttach(Context context) { + super.onAttach(context); + + _masterFrag = + (RotationPersist2Fragment) + ((MainActivity) context) + .getSupportFragmentManager() + .findFragmentByTag(RotationPersist2Fragment.TAG); + + if (_masterFrag == null) { + throw new ClassCastException("We did not find a master who can understand us :("); + } + } + + /** This method will only be called once when the retained Fragment is first created. */ + @Override + public void onCreate(Bundle savedInstanceState) { + super.onCreate(savedInstanceState); + + _intStream = PublishProcessor.create(); + _lifeCycleStream = PublishProcessor.create(); + + // Retain this fragment across configuration changes. + setRetainInstance(true); + + _intStream.takeUntil(_lifeCycleStream); + + Flowable.interval(1, TimeUnit.SECONDS).map(Long::intValue).take(20).subscribe(_intStream); + } + + /** The Worker fragment has started doing it's thing */ + @Override + public void onResume() { + super.onResume(); + _masterFrag.setStream(_intStream); + } + + @Override + public void onDestroy() { + super.onDestroy(); + _lifeCycleStream.onComplete(); + } + + /** Set the callback to null so we don't accidentally leak the Activity instance. */ + @Override + public void onDetach() { + super.onDetach(); + _masterFrag = null; + } + + public interface IAmYourMaster { + void setStream(Flowable intStream); + } +} diff --git a/app/src/main/java/com/morihacky/android/rxjava/fragments/RotationPersist3Fragment.kt b/app/src/main/java/com/morihacky/android/rxjava/fragments/RotationPersist3Fragment.kt new file mode 100644 index 00000000..a69e0426 --- /dev/null +++ b/app/src/main/java/com/morihacky/android/rxjava/fragments/RotationPersist3Fragment.kt @@ -0,0 +1,116 @@ +package com.morihacky.android.rxjava.fragments + +import android.arch.lifecycle.ViewModel +import android.arch.lifecycle.ViewModelProviders +import android.os.Bundle +import android.os.Handler +import android.os.Looper.getMainLooper +import android.view.LayoutInflater +import android.view.View +import android.view.ViewGroup +import android.widget.ListView +import butterknife.BindView +import butterknife.ButterKnife +import butterknife.OnClick +import com.morihacky.android.rxjava.MyApp +import com.morihacky.android.rxjava.R +import com.morihacky.android.rxjava.ext.plus +import com.morihacky.android.rxjava.wiring.LogAdapter +import io.reactivex.Flowable +import io.reactivex.disposables.CompositeDisposable +import io.reactivex.disposables.Disposable +import timber.log.Timber +import java.util.concurrent.TimeUnit + +class RotationPersist3Fragment : BaseFragment() { + + @BindView(R.id.list_threading_log) + lateinit var logList: ListView + lateinit var adapter: LogAdapter + lateinit var sharedViewModel: SharedViewModel + + private var logs: MutableList = ArrayList() + private var disposables = CompositeDisposable() + + // ----------------------------------------------------------------------------------- + + override fun onCreate(savedInstanceState: Bundle?) { + super.onCreate(savedInstanceState) + sharedViewModel = ViewModelProviders.of(activity).get(SharedViewModel::class.java) + } + + override fun onCreateView( + inflater: LayoutInflater?, container: ViewGroup?, savedInstanceState: Bundle?): View? { + val layout = inflater!!.inflate(R.layout.fragment_rotation_persist, container, false) + ButterKnife.bind(this, layout) + return layout + } + + @OnClick(R.id.btn_rotate_persist) + fun startOperationFromWorkerFrag() { + logs = ArrayList() + adapter.clear() + + disposables += + sharedViewModel + .sourceStream() + .subscribe({ l -> + _log("Received element $l") + }) + } + + // ----------------------------------------------------------------------------------- + // Boilerplate + // ----------------------------------------------------------------------------------- + + override fun onActivityCreated(savedInstanceState: Bundle?) { + super.onActivityCreated(savedInstanceState) + _setupLogger() + } + + override fun onPause() { + super.onPause() + disposables.clear() + } + + private fun _setupLogger() { + logs = ArrayList() + adapter = LogAdapter(activity, ArrayList()) + logList.adapter = adapter + } + + private fun _log(logMsg: String) { + logs.add(0, logMsg) + + // You can only do below stuff on main thread. + Handler(getMainLooper()) + .post { + adapter.clear() + adapter.addAll(logs) + } + } +} + +class SharedViewModel : ViewModel() { + var disposable: Disposable? = null + + var sharedObservable: Flowable = + Flowable.interval(1, TimeUnit.SECONDS) + .take(20) + .doOnNext { l -> Timber.tag("KG").d("onNext $l") } + // .replayingShare() + .replay(1) + .autoConnect(1) { t -> disposable = t } + + fun sourceStream(): Flowable { + return sharedObservable + } + + override fun onCleared() { + super.onCleared() + Timber.tag("KG").d("Clearing ViewModel") + disposable?.dispose() + MyApp.getRefWatcher().watch(this) + } +} + diff --git a/app/src/main/java/com/morihacky/android/rxjava/fragments/TimeoutDemoFragment.java b/app/src/main/java/com/morihacky/android/rxjava/fragments/TimeoutDemoFragment.java new file mode 100644 index 00000000..abeace6b --- /dev/null +++ b/app/src/main/java/com/morihacky/android/rxjava/fragments/TimeoutDemoFragment.java @@ -0,0 +1,183 @@ +package com.morihacky.android.rxjava.fragments; + +import android.os.Bundle; +import android.os.Handler; +import android.os.Looper; +import android.support.annotation.Nullable; +import android.view.LayoutInflater; +import android.view.View; +import android.view.ViewGroup; +import android.widget.ListView; +import butterknife.BindView; +import butterknife.ButterKnife; +import butterknife.OnClick; +import com.morihacky.android.rxjava.R; +import com.morihacky.android.rxjava.wiring.LogAdapter; +import io.reactivex.Observable; +import io.reactivex.ObservableEmitter; +import io.reactivex.ObservableOnSubscribe; +import io.reactivex.android.schedulers.AndroidSchedulers; +import io.reactivex.observers.DisposableObserver; +import io.reactivex.schedulers.Schedulers; +import java.util.ArrayList; +import java.util.List; +import java.util.concurrent.TimeUnit; +import timber.log.Timber; + +public class TimeoutDemoFragment extends BaseFragment { + + @BindView(R.id.list_threading_log) + ListView _logsList; + + private LogAdapter _adapter; + private DisposableObserver _disposable; + private List _logs; + + @Override + public void onDestroy() { + super.onDestroy(); + + if (_disposable == null) { + return; + } + + _disposable.dispose(); + } + + @Override + public View onCreateView( + LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) { + View layout = inflater.inflate(R.layout.fragment_subject_timeout, container, false); + ButterKnife.bind(this, layout); + return layout; + } + + @Override + public void onActivityCreated(@Nullable Bundle savedInstanceState) { + super.onActivityCreated(savedInstanceState); + _setupLogger(); + } + + @OnClick(R.id.btn_demo_timeout_1_2s) + public void onStart2sTask() { + _disposable = _getEventCompletionObserver(); + + _getObservableTask_2sToComplete() + .timeout(3, TimeUnit.SECONDS) + .subscribeOn(Schedulers.computation()) + .observeOn(AndroidSchedulers.mainThread()) + .subscribe(_disposable); + } + + @OnClick(R.id.btn_demo_timeout_1_5s) + public void onStart5sTask() { + _disposable = _getEventCompletionObserver(); + + _getObservableTask_5sToComplete() + .timeout(3, TimeUnit.SECONDS, _onTimeoutObservable()) + .subscribeOn(Schedulers.computation()) + .observeOn(AndroidSchedulers.mainThread()) + .subscribe(_disposable); + } + + // ----------------------------------------------------------------------------------- + // Main Rx entities + + private Observable _getObservableTask_5sToComplete() { + return Observable.create( + new ObservableOnSubscribe() { + @Override + public void subscribe(ObservableEmitter subscriber) throws Exception { + _log(String.format("Starting a 5s task")); + subscriber.onNext("5 s"); + try { + Thread.sleep(5_000); + } catch (InterruptedException e) { + e.printStackTrace(); + } + subscriber.onComplete(); + } + }); + } + + private Observable _getObservableTask_2sToComplete() { + return Observable.create( + new ObservableOnSubscribe() { + @Override + public void subscribe(ObservableEmitter subscriber) throws Exception { + _log(String.format("Starting a 2s task")); + subscriber.onNext("2 s"); + try { + Thread.sleep(2_000); + } catch (InterruptedException e) { + e.printStackTrace(); + } + subscriber.onComplete(); + } + }); + } + + private Observable _onTimeoutObservable() { + return Observable.create( + new ObservableOnSubscribe() { + + @Override + public void subscribe(ObservableEmitter subscriber) throws Exception { + _log("Timing out this task ..."); + subscriber.onError(new Throwable("Timeout Error")); + } + }); + } + + private DisposableObserver _getEventCompletionObserver() { + return new DisposableObserver() { + @Override + public void onNext(String taskType) { + _log(String.format("onNext %s task", taskType)); + } + + @Override + public void onError(Throwable e) { + _log(String.format("Dang a task timeout")); + Timber.e(e, "Timeout Demo exception"); + } + + @Override + public void onComplete() { + _log(String.format("task was completed")); + } + }; + } + + // ----------------------------------------------------------------------------------- + // Method that help wiring up the example (irrelevant to RxJava) + + private void _setupLogger() { + _logs = new ArrayList<>(); + _adapter = new LogAdapter(getActivity(), new ArrayList<>()); + _logsList.setAdapter(_adapter); + } + + private void _log(String logMsg) { + + if (_isCurrentlyOnMainThread()) { + _logs.add(0, logMsg + " (main thread) "); + _adapter.clear(); + _adapter.addAll(_logs); + } else { + _logs.add(0, logMsg + " (NOT main thread) "); + + // You can only do below stuff on main thread. + new Handler(Looper.getMainLooper()) + .post( + () -> { + _adapter.clear(); + _adapter.addAll(_logs); + }); + } + } + + private boolean _isCurrentlyOnMainThread() { + return Looper.myLooper() == Looper.getMainLooper(); + } +} diff --git a/app/src/main/java/com/morihacky/android/rxjava/fragments/TimingDemoFragment.java b/app/src/main/java/com/morihacky/android/rxjava/fragments/TimingDemoFragment.java new file mode 100644 index 00000000..55fb027c --- /dev/null +++ b/app/src/main/java/com/morihacky/android/rxjava/fragments/TimingDemoFragment.java @@ -0,0 +1,236 @@ +package com.morihacky.android.rxjava.fragments; + +import android.os.Bundle; +import android.os.Handler; +import android.support.annotation.Nullable; +import android.view.LayoutInflater; +import android.view.View; +import android.view.ViewGroup; +import android.widget.ListView; +import butterknife.BindView; +import butterknife.ButterKnife; +import butterknife.OnClick; +import com.morihacky.android.rxjava.R; +import com.morihacky.android.rxjava.wiring.LogAdapter; + +import butterknife.Unbinder; +import io.reactivex.Flowable; +import io.reactivex.subscribers.DefaultSubscriber; +import io.reactivex.subscribers.DisposableSubscriber; +import java.text.SimpleDateFormat; +import java.util.ArrayList; +import java.util.Date; +import java.util.List; +import java.util.Locale; +import java.util.concurrent.TimeUnit; +import timber.log.Timber; + +import static android.os.Looper.getMainLooper; +import static android.os.Looper.myLooper; + +public class TimingDemoFragment extends BaseFragment { + + @BindView(R.id.list_threading_log) + ListView _logsList; + + private LogAdapter _adapter; + private List _logs; + + private DisposableSubscriber _subscriber1; + private DisposableSubscriber _subscriber2; + private Unbinder unbinder; + + @Override + public View onCreateView( + LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) { + View layout = inflater.inflate(R.layout.fragment_demo_timing, container, false); + unbinder = ButterKnife.bind(this, layout); + return layout; + } + + @Override + public void onActivityCreated(@Nullable Bundle savedInstanceState) { + super.onActivityCreated(savedInstanceState); + _setupLogger(); + } + + @Override + public void onDestroyView() { + super.onDestroyView(); + unbinder.unbind(); + } + // ----------------------------------------------------------------------------------- + + @OnClick(R.id.btn_demo_timing_1) + public void btn1_RunSingleTaskAfter2s() { + _log(String.format("A1 [%s] --- BTN click", _getCurrentTimestamp())); + + Flowable.timer(2, TimeUnit.SECONDS) // + .subscribe( + new DefaultSubscriber() { + @Override + public void onNext(Long number) { + _log(String.format("A1 [%s] NEXT", _getCurrentTimestamp())); + } + + @Override + public void onError(Throwable e) { + Timber.e(e, "something went wrong in TimingDemoFragment example"); + } + + @Override + public void onComplete() { + _log(String.format("A1 [%s] XXX COMPLETE", _getCurrentTimestamp())); + } + }); + } + + @OnClick(R.id.btn_demo_timing_2) + public void btn2_RunTask_IntervalOf1s() { + if (_subscriber1 != null && !_subscriber1.isDisposed()) { + _subscriber1.dispose(); + _log(String.format("B2 [%s] XXX BTN KILLED", _getCurrentTimestamp())); + return; + } + + _log(String.format("B2 [%s] --- BTN click", _getCurrentTimestamp())); + + _subscriber1 = + new DisposableSubscriber() { + @Override + public void onComplete() { + _log(String.format("B2 [%s] XXXX COMPLETE", _getCurrentTimestamp())); + } + + @Override + public void onError(Throwable e) { + Timber.e(e, "something went wrong in TimingDemoFragment example"); + } + + @Override + public void onNext(Long number) { + _log(String.format("B2 [%s] NEXT", _getCurrentTimestamp())); + } + }; + + Flowable.interval(1, TimeUnit.SECONDS).subscribe(_subscriber1); + } + + @OnClick(R.id.btn_demo_timing_3) + public void btn3_RunTask_IntervalOf1s_StartImmediately() { + if (_subscriber2 != null && !_subscriber2.isDisposed()) { + _subscriber2.dispose(); + _log(String.format("C3 [%s] XXX BTN KILLED", _getCurrentTimestamp())); + return; + } + + _log(String.format("C3 [%s] --- BTN click", _getCurrentTimestamp())); + + _subscriber2 = + new DisposableSubscriber() { + @Override + public void onNext(Long number) { + _log(String.format("C3 [%s] NEXT", _getCurrentTimestamp())); + } + + @Override + public void onComplete() { + _log(String.format("C3 [%s] XXXX COMPLETE", _getCurrentTimestamp())); + } + + @Override + public void onError(Throwable e) { + Timber.e(e, "something went wrong in TimingDemoFragment example"); + } + }; + + Flowable.interval(0, 1, TimeUnit.SECONDS).subscribe(_subscriber2); + } + + @OnClick(R.id.btn_demo_timing_4) + public void btn4_RunTask5Times_IntervalOf3s() { + _log(String.format("D4 [%s] --- BTN click", _getCurrentTimestamp())); + + Flowable.interval(3, TimeUnit.SECONDS) + .take(5) + .subscribe( + new DefaultSubscriber() { + @Override + public void onNext(Long number) { + _log(String.format("D4 [%s] NEXT", _getCurrentTimestamp())); + } + + @Override + public void onError(Throwable e) { + Timber.e(e, "something went wrong in TimingDemoFragment example"); + } + + @Override + public void onComplete() { + _log(String.format("D4 [%s] XXX COMPLETE", _getCurrentTimestamp())); + } + }); + } + + @OnClick(R.id.btn_demo_timing_5) + public void btn5_RunTask5Times_IntervalOf3s() { + _log(String.format("D5 [%s] --- BTN click", _getCurrentTimestamp())); + + Flowable.just("Do task A right away") + .doOnNext(input -> _log(String.format("D5 %s [%s]", input, _getCurrentTimestamp()))) + .delay(1, TimeUnit.SECONDS) + .doOnNext( + oldInput -> + _log( + String.format( + "D5 %s [%s]", "Doing Task B after a delay", _getCurrentTimestamp()))) + .subscribe( + new DefaultSubscriber() { + @Override + public void onComplete() { + _log(String.format("D5 [%s] XXX COMPLETE", _getCurrentTimestamp())); + } + + @Override + public void onError(Throwable e) { + Timber.e(e, "something went wrong in TimingDemoFragment example"); + } + + @Override + public void onNext(String number) { + _log(String.format("D5 [%s] NEXT", _getCurrentTimestamp())); + } + }); + } + + // ----------------------------------------------------------------------------------- + // Method that help wiring up the example (irrelevant to RxJava) + + @OnClick(R.id.btn_clr) + public void OnClearLog() { + _logs = new ArrayList<>(); + _adapter.clear(); + } + + private void _setupLogger() { + _logs = new ArrayList<>(); + _adapter = new LogAdapter(getActivity(), new ArrayList<>()); + _logsList.setAdapter(_adapter); + } + + private void _log(String logMsg) { + _logs.add(0, String.format(logMsg + " [MainThread: %b]", getMainLooper() == myLooper())); + + // You can only do below stuff on main thread. + new Handler(getMainLooper()) + .post( + () -> { + _adapter.clear(); + _adapter.addAll(_logs); + }); + } + + private String _getCurrentTimestamp() { + return new SimpleDateFormat("k:m:s:S a", Locale.getDefault()).format(new Date()); + } +} diff --git a/app/src/main/java/com/morihacky/android/rxjava/pagination/PaginationAdapter.java b/app/src/main/java/com/morihacky/android/rxjava/pagination/PaginationAdapter.java new file mode 100644 index 00000000..48cc49fd --- /dev/null +++ b/app/src/main/java/com/morihacky/android/rxjava/pagination/PaginationAdapter.java @@ -0,0 +1,100 @@ +package com.morihacky.android.rxjava.pagination; + +import android.support.v7.widget.RecyclerView; +import android.view.LayoutInflater; +import android.view.View; +import android.view.ViewGroup; +import android.widget.Button; +import android.widget.TextView; + +import com.morihacky.android.rxjava.R; +import com.morihacky.android.rxjava.rxbus.RxBus; + +import java.util.ArrayList; +import java.util.List; + +/** There isn't anything specific to Pagination here. Just wiring for the example */ +class PaginationAdapter extends RecyclerView.Adapter { + + private static final int ITEM_LOG = 0; + private static final int ITEM_BTN = 1; + + private final List _items = new ArrayList<>(); + private final RxBus _bus; + + PaginationAdapter(RxBus bus) { + _bus = bus; + } + + void addItems(List items) { + _items.addAll(items); + } + + @Override + public int getItemViewType(int position) { + if (position == _items.size()) { + return ITEM_BTN; + } + + return ITEM_LOG; + } + + @Override + public RecyclerView.ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) { + switch (viewType) { + case ITEM_BTN: + return ItemBtnViewHolder.create(parent); + default: + return ItemLogViewHolder.create(parent); + } + } + + @Override + public void onBindViewHolder(RecyclerView.ViewHolder holder, int position) { + switch (getItemViewType(position)) { + case ITEM_LOG: + ((ItemLogViewHolder) holder).bindContent(_items.get(position)); + return; + case ITEM_BTN: + ((ItemBtnViewHolder) holder).bindContent(_bus); + } + } + + @Override + public int getItemCount() { + return _items.size() + 1; // add 1 for paging button + } + + private static class ItemLogViewHolder extends RecyclerView.ViewHolder { + ItemLogViewHolder(View itemView) { + super(itemView); + } + + static ItemLogViewHolder create(ViewGroup parent) { + return new ItemLogViewHolder( + LayoutInflater.from(parent.getContext()).inflate(R.layout.item_log, parent, false)); + } + + void bindContent(String content) { + ((TextView) itemView).setText(content); + } + } + + static class ItemBtnViewHolder extends RecyclerView.ViewHolder { + ItemBtnViewHolder(View itemView) { + super(itemView); + } + + static ItemBtnViewHolder create(ViewGroup parent) { + return new ItemBtnViewHolder( + LayoutInflater.from(parent.getContext()).inflate(R.layout.item_btn, parent, false)); + } + + void bindContent(RxBus bus) { + ((Button) itemView).setText(R.string.btn_demo_pagination_more); + itemView.setOnClickListener(v -> bus.send(new ItemBtnViewHolder.PageEvent())); + } + + static class PageEvent {} + } +} diff --git a/app/src/main/java/com/morihacky/android/rxjava/pagination/PaginationAutoAdapter.java b/app/src/main/java/com/morihacky/android/rxjava/pagination/PaginationAutoAdapter.java new file mode 100644 index 00000000..75d8adeb --- /dev/null +++ b/app/src/main/java/com/morihacky/android/rxjava/pagination/PaginationAutoAdapter.java @@ -0,0 +1,69 @@ +package com.morihacky.android.rxjava.pagination; + +import android.support.v7.widget.RecyclerView; +import android.view.LayoutInflater; +import android.view.View; +import android.view.ViewGroup; +import android.widget.TextView; +import com.morihacky.android.rxjava.R; +import com.morihacky.android.rxjava.rxbus.RxBus; +import java.util.ArrayList; +import java.util.List; + +class PaginationAutoAdapter extends RecyclerView.Adapter { + + private static final int ITEM_LOG = 0; + + private final List _items = new ArrayList<>(); + private final RxBus _bus; + + PaginationAutoAdapter(RxBus bus) { + _bus = bus; + } + + @Override + public RecyclerView.ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) { + return ItemLogViewHolder.create(parent); + } + + @Override + public void onBindViewHolder(RecyclerView.ViewHolder holder, int position) { + ((ItemLogViewHolder) holder).bindContent(_items.get(position)); + + boolean lastPositionReached = position == _items.size() - 1; + if (lastPositionReached) { + _bus.send(new PageEvent()); + } + } + + @Override + public int getItemViewType(int position) { + return ITEM_LOG; + } + + @Override + public int getItemCount() { + return _items.size(); + } + + void addItems(List items) { + _items.addAll(items); + } + + private static class ItemLogViewHolder extends RecyclerView.ViewHolder { + ItemLogViewHolder(View itemView) { + super(itemView); + } + + static ItemLogViewHolder create(ViewGroup parent) { + return new ItemLogViewHolder( + LayoutInflater.from(parent.getContext()).inflate(R.layout.item_log, parent, false)); + } + + void bindContent(String content) { + ((TextView) itemView).setText(content); + } + } + + static class PageEvent {} +} diff --git a/app/src/main/java/com/morihacky/android/rxjava/pagination/PaginationAutoFragment.java b/app/src/main/java/com/morihacky/android/rxjava/pagination/PaginationAutoFragment.java new file mode 100644 index 00000000..e90d923b --- /dev/null +++ b/app/src/main/java/com/morihacky/android/rxjava/pagination/PaginationAutoFragment.java @@ -0,0 +1,135 @@ +package com.morihacky.android.rxjava.pagination; + +import android.os.Bundle; +import android.support.annotation.Nullable; +import android.support.v7.widget.LinearLayoutManager; +import android.support.v7.widget.RecyclerView; +import android.view.LayoutInflater; +import android.view.View; +import android.view.ViewGroup; +import android.widget.ProgressBar; +import butterknife.BindView; +import butterknife.ButterKnife; +import com.morihacky.android.rxjava.MainActivity; +import com.morihacky.android.rxjava.R; +import com.morihacky.android.rxjava.fragments.BaseFragment; +import com.morihacky.android.rxjava.rxbus.RxBus; +import io.reactivex.Flowable; +import io.reactivex.android.schedulers.AndroidSchedulers; +import io.reactivex.disposables.CompositeDisposable; +import io.reactivex.disposables.Disposable; +import io.reactivex.processors.PublishProcessor; +import java.util.ArrayList; +import java.util.List; +import java.util.concurrent.TimeUnit; + +public class PaginationAutoFragment extends BaseFragment { + + @BindView(R.id.list_paging) + RecyclerView _pagingList; + + @BindView(R.id.progress_paging) + ProgressBar _progressBar; + + private PaginationAutoAdapter _adapter; + private RxBus _bus; + private CompositeDisposable _disposables; + private PublishProcessor _paginator; + private boolean _requestUnderWay = false; + + @Override + public View onCreateView( + LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) { + View layout = inflater.inflate(R.layout.fragment_pagination, container, false); + ButterKnife.bind(this, layout); + return layout; + } + + @Override + public void onActivityCreated(@Nullable Bundle savedInstanceState) { + super.onActivityCreated(savedInstanceState); + + _bus = ((MainActivity) getActivity()).getRxBusSingleton(); + + LinearLayoutManager layoutManager = new LinearLayoutManager(getActivity()); + layoutManager.setOrientation(LinearLayoutManager.VERTICAL); + _pagingList.setLayoutManager(layoutManager); + + _adapter = new PaginationAutoAdapter(_bus); + _pagingList.setAdapter(_adapter); + + _paginator = PublishProcessor.create(); + } + + @Override + public void onStart() { + super.onStart(); + _disposables = new CompositeDisposable(); + + Disposable d2 = + _paginator + .onBackpressureDrop() + .doOnNext( + i -> { + _requestUnderWay = true; + _progressBar.setVisibility(View.VISIBLE); + }) + .concatMap(this::_itemsFromNetworkCall) + .observeOn(AndroidSchedulers.mainThread()) + .map( + items -> { + _adapter.addItems(items); + _adapter.notifyDataSetChanged(); + + return items; + }) + .doOnNext( + i -> { + _requestUnderWay = false; + _progressBar.setVisibility(View.INVISIBLE); + }) + .subscribe(); + + // I'm using an RxBus purely to hear from a nested button click + // we don't really need Rx for this part. it's just easy ¯\_(ツ)_/¯ + + Disposable d1 = + _bus.asFlowable() + .filter(o -> !_requestUnderWay) + .subscribe( + event -> { + if (event instanceof PaginationAutoAdapter.PageEvent) { + + // trigger the paginator for the next event + int nextPage = _adapter.getItemCount(); + _paginator.onNext(nextPage); + } + }); + + _disposables.add(d1); + _disposables.add(d2); + + _paginator.onNext(0); + } + + @Override + public void onStop() { + super.onStop(); + _disposables.clear(); + } + + /** Fake Observable that simulates a network call and then sends down a list of items */ + private Flowable> _itemsFromNetworkCall(int pageStart) { + return Flowable.just(true) + .observeOn(AndroidSchedulers.mainThread()) + .delay(2, TimeUnit.SECONDS) + .map( + dummy -> { + List items = new ArrayList<>(); + for (int i = 0; i < 10; i++) { + items.add("Item " + (pageStart + i)); + } + return items; + }); + } +} diff --git a/app/src/main/java/com/morihacky/android/rxjava/pagination/PaginationFragment.java b/app/src/main/java/com/morihacky/android/rxjava/pagination/PaginationFragment.java new file mode 100644 index 00000000..bfe727f1 --- /dev/null +++ b/app/src/main/java/com/morihacky/android/rxjava/pagination/PaginationFragment.java @@ -0,0 +1,128 @@ +package com.morihacky.android.rxjava.pagination; + +import android.os.Bundle; +import android.support.annotation.Nullable; +import android.support.v7.widget.LinearLayoutManager; +import android.support.v7.widget.RecyclerView; +import android.view.LayoutInflater; +import android.view.View; +import android.view.ViewGroup; +import android.widget.ProgressBar; +import butterknife.BindView; +import butterknife.ButterKnife; +import com.morihacky.android.rxjava.MainActivity; +import com.morihacky.android.rxjava.R; +import com.morihacky.android.rxjava.fragments.BaseFragment; +import com.morihacky.android.rxjava.rxbus.RxBus; +import io.reactivex.Flowable; +import io.reactivex.android.schedulers.AndroidSchedulers; +import io.reactivex.disposables.CompositeDisposable; +import io.reactivex.disposables.Disposable; +import io.reactivex.processors.PublishProcessor; +import java.util.ArrayList; +import java.util.List; +import java.util.concurrent.TimeUnit; + +public class PaginationFragment extends BaseFragment { + + @BindView(R.id.list_paging) + RecyclerView _pagingList; + + @BindView(R.id.progress_paging) + ProgressBar _progressBar; + + private PaginationAdapter _adapter; + private RxBus _bus; + private CompositeDisposable _disposables; + private PublishProcessor _paginator; + + @Override + public void onActivityCreated(@Nullable Bundle savedInstanceState) { + super.onActivityCreated(savedInstanceState); + + _bus = ((MainActivity) getActivity()).getRxBusSingleton(); + + LinearLayoutManager layoutManager = new LinearLayoutManager(getActivity()); + layoutManager.setOrientation(LinearLayoutManager.VERTICAL); + _pagingList.setLayoutManager(layoutManager); + + _adapter = new PaginationAdapter(_bus); + _pagingList.setAdapter(_adapter); + + _paginator = PublishProcessor.create(); + } + + @Override + public void onStart() { + super.onStart(); + _disposables = new CompositeDisposable(); + + Disposable d2 = + _paginator + .onBackpressureDrop() + .concatMap(nextPage -> _itemsFromNetworkCall(nextPage + 1, 10)) + .observeOn(AndroidSchedulers.mainThread()) + .map( + items -> { + int start = _adapter.getItemCount() - 1; + + _adapter.addItems(items); + _adapter.notifyItemRangeInserted(start, 10); + + _progressBar.setVisibility(View.INVISIBLE); + + return items; + }) + .subscribe(); + + // I'm using an Rxbus purely to hear from a nested button click + // we don't really need Rx for this part. it's just easy ¯\_(ツ)_/¯ + Disposable d1 = + _bus.asFlowable() + .subscribe( + event -> { + if (event instanceof PaginationAdapter.ItemBtnViewHolder.PageEvent) { + + // trigger the paginator for the next event + int nextPage = _adapter.getItemCount() - 1; + _paginator.onNext(nextPage); + } + }); + + _disposables.add(d1); + _disposables.add(d2); + } + + @Override + public void onStop() { + super.onStop(); + _disposables.clear(); + } + + /** Fake Observable that simulates a network call and then sends down a list of items */ + private Flowable> _itemsFromNetworkCall(int start, int count) { + return Flowable.just(true) + .observeOn(AndroidSchedulers.mainThread()) + .doOnNext(dummy -> _progressBar.setVisibility(View.VISIBLE)) + .delay(2, TimeUnit.SECONDS) + .map( + dummy -> { + List items = new ArrayList<>(); + for (int i = 0; i < count; i++) { + items.add("Item " + (start + i)); + } + return items; + }); + } + + // ----------------------------------------------------------------------------------- + // WIRING up the views required for this example + + @Override + public View onCreateView( + LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) { + View layout = inflater.inflate(R.layout.fragment_pagination, container, false); + ButterKnife.bind(this, layout); + return layout; + } +} diff --git a/app/src/main/java/com/morihacky/android/rxjava/retrofit/GithubApi.java b/app/src/main/java/com/morihacky/android/rxjava/retrofit/GithubApi.java index d25a883d..21e32e8e 100644 --- a/app/src/main/java/com/morihacky/android/rxjava/retrofit/GithubApi.java +++ b/app/src/main/java/com/morihacky/android/rxjava/retrofit/GithubApi.java @@ -1,22 +1,26 @@ package com.morihacky.android.rxjava.retrofit; import java.util.List; -import retrofit.http.GET; -import retrofit.http.Path; -import rx.Observable; + +import io.reactivex.Observable; +import retrofit2.http.GET; +import retrofit2.http.Path; public interface GithubApi { - /** - * See https://developer.github.com/v3/repos/#list-contributors - */ + /** See https://developer.github.com/v3/repos/#list-contributors */ + @GET("/repos/{owner}/{repo}/contributors") + Observable> contributors( + @Path("owner") String owner, @Path("repo") String repo); + @GET("/repos/{owner}/{repo}/contributors") - Observable> contributors(@Path("owner") String owner, - @Path("repo") String repo); + List getContributors(@Path("owner") String owner, @Path("repo") String repo); - /** - * See https://developer.github.com/v3/users/ - */ + /** See https://developer.github.com/v3/users/ */ @GET("/users/{user}") Observable user(@Path("user") String user); -} \ No newline at end of file + + /** See https://developer.github.com/v3/users/ */ + @GET("/users/{user}") + User getUser(@Path("user") String user); +} diff --git a/app/src/main/java/com/morihacky/android/rxjava/retrofit/GithubService.java b/app/src/main/java/com/morihacky/android/rxjava/retrofit/GithubService.java new file mode 100644 index 00000000..3ab57571 --- /dev/null +++ b/app/src/main/java/com/morihacky/android/rxjava/retrofit/GithubService.java @@ -0,0 +1,46 @@ +package com.morihacky.android.rxjava.retrofit; + +import android.text.TextUtils; + +import com.jakewharton.retrofit2.adapter.rxjava2.RxJava2CallAdapterFactory; + +import okhttp3.OkHttpClient; +import okhttp3.Request; +import retrofit2.Retrofit; +import retrofit2.converter.gson.GsonConverterFactory; + +import static java.lang.String.format; + +public class GithubService { + + private GithubService() {} + + public static GithubApi createGithubService(final String githubToken) { + Retrofit.Builder builder = + new Retrofit.Builder() + .addCallAdapterFactory(RxJava2CallAdapterFactory.create()) + .addConverterFactory(GsonConverterFactory.create()) + .baseUrl("https://api.github.com"); + + if (!TextUtils.isEmpty(githubToken)) { + + OkHttpClient client = + new OkHttpClient.Builder() + .addInterceptor( + chain -> { + Request request = chain.request(); + Request newReq = + request + .newBuilder() + .addHeader("Authorization", format("token %s", githubToken)) + .build(); + return chain.proceed(newReq); + }) + .build(); + + builder.client(client); + } + + return builder.build().create(GithubApi.class); + } +} diff --git a/app/src/main/java/com/morihacky/android/rxjava/rxbus/RxBus.java b/app/src/main/java/com/morihacky/android/rxjava/rxbus/RxBus.java index afaa595c..0e8f4fed 100644 --- a/app/src/main/java/com/morihacky/android/rxjava/rxbus/RxBus.java +++ b/app/src/main/java/com/morihacky/android/rxjava/rxbus/RxBus.java @@ -1,30 +1,25 @@ package com.morihacky.android.rxjava.rxbus; -import rx.Observable; -import rx.subjects.PublishSubject; -import rx.subjects.SerializedSubject; -import rx.subjects.Subject; +import com.jakewharton.rxrelay2.PublishRelay; +import com.jakewharton.rxrelay2.Relay; -/** - * courtesy: https://gist.github.com/benjchristensen/04eef9ca0851f3a5d7bf - */ -public class RxBus { +import io.reactivex.BackpressureStrategy; +import io.reactivex.Flowable; - //private final PublishSubject _bus = PublishSubject.create(); +/** courtesy: https://gist.github.com/benjchristensen/04eef9ca0851f3a5d7bf */ +public class RxBus { - // If multiple threads are going to emit events to this - // then it must be made thread-safe like this instead - private final Subject _bus = new SerializedSubject<>(PublishSubject.create()); + private final Relay _bus = PublishRelay.create().toSerialized(); public void send(Object o) { - _bus.onNext(o); + _bus.accept(o); } - public Observable toObserverable() { - return _bus; + public Flowable asFlowable() { + return _bus.toFlowable(BackpressureStrategy.LATEST); } public boolean hasObservers() { return _bus.hasObservers(); } -} \ No newline at end of file +} diff --git a/app/src/main/java/com/morihacky/android/rxjava/rxbus/RxBusDemoFragment.java b/app/src/main/java/com/morihacky/android/rxjava/rxbus/RxBusDemoFragment.java index d9dd4c10..f08ea85c 100644 --- a/app/src/main/java/com/morihacky/android/rxjava/rxbus/RxBusDemoFragment.java +++ b/app/src/main/java/com/morihacky/android/rxjava/rxbus/RxBusDemoFragment.java @@ -2,22 +2,20 @@ import android.os.Bundle; import android.support.annotation.Nullable; -import android.support.v4.app.Fragment; import android.view.LayoutInflater; import android.view.View; import android.view.ViewGroup; import butterknife.ButterKnife; -import com.morihacky.android.rxjava.app.R; +import com.morihacky.android.rxjava.R; +import com.morihacky.android.rxjava.fragments.BaseFragment; -public class RxBusDemoFragment - extends Fragment { +public class RxBusDemoFragment extends BaseFragment { @Override - public View onCreateView(LayoutInflater inflater, - @Nullable ViewGroup container, - @Nullable Bundle savedInstanceState) { + public View onCreateView( + LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) { View layout = inflater.inflate(R.layout.fragment_rxbus_demo, container, false); - ButterKnife.inject(this, layout); + ButterKnife.bind(this, layout); return layout; } @@ -25,7 +23,8 @@ public View onCreateView(LayoutInflater inflater, public void onActivityCreated(@Nullable Bundle savedInstanceState) { super.onActivityCreated(savedInstanceState); - getActivity().getSupportFragmentManager() + getActivity() + .getSupportFragmentManager() .beginTransaction() .replace(R.id.demo_rxbus_frag_1, new RxBusDemo_TopFragment()) .replace(R.id.demo_rxbus_frag_2, new RxBusDemo_Bottom3Fragment()) @@ -35,4 +34,4 @@ public void onActivityCreated(@Nullable Bundle savedInstanceState) { } public static class TapEvent {} -} \ No newline at end of file +} diff --git a/app/src/main/java/com/morihacky/android/rxjava/rxbus/RxBusDemo_Bottom1Fragment.java b/app/src/main/java/com/morihacky/android/rxjava/rxbus/RxBusDemo_Bottom1Fragment.java index 0cc5b5ea..1eb1e2ec 100644 --- a/app/src/main/java/com/morihacky/android/rxjava/rxbus/RxBusDemo_Bottom1Fragment.java +++ b/app/src/main/java/com/morihacky/android/rxjava/rxbus/RxBusDemo_Bottom1Fragment.java @@ -2,35 +2,31 @@ import android.os.Bundle; import android.support.annotation.Nullable; -import android.support.v4.app.Fragment; import android.support.v4.view.ViewCompat; import android.view.LayoutInflater; import android.view.View; import android.view.ViewGroup; import android.widget.TextView; +import butterknife.BindView; import butterknife.ButterKnife; -import butterknife.InjectView; import com.morihacky.android.rxjava.MainActivity; -import com.morihacky.android.rxjava.app.R; -import rx.functions.Action1; -import rx.subscriptions.CompositeSubscription; +import com.morihacky.android.rxjava.R; +import com.morihacky.android.rxjava.fragments.BaseFragment; +import io.reactivex.disposables.CompositeDisposable; -import static rx.android.observables.AndroidObservable.bindFragment; +public class RxBusDemo_Bottom1Fragment extends BaseFragment { -public class RxBusDemo_Bottom1Fragment - extends Fragment { + @BindView(R.id.demo_rxbus_tap_txt) + TextView _tapEventTxtShow; + private CompositeDisposable _disposables; private RxBus _rxBus; - private CompositeSubscription _subscriptions; - - @InjectView(R.id.demo_rxbus_tap_txt) TextView _tapEventTxtShow; @Override - public View onCreateView(LayoutInflater inflater, - @Nullable ViewGroup container, - @Nullable Bundle savedInstanceState) { + public View onCreateView( + LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) { View layout = inflater.inflate(R.layout.fragment_rxbus_bottom, container, false); - ButterKnife.inject(this, layout); + ButterKnife.bind(this, layout); return layout; } @@ -43,18 +39,23 @@ public void onActivityCreated(@Nullable Bundle savedInstanceState) { @Override public void onStart() { super.onStart(); - _subscriptions = new CompositeSubscription(); + _disposables = new CompositeDisposable(); + + _disposables.add( + _rxBus + .asFlowable() + .subscribe( + event -> { + if (event instanceof RxBusDemoFragment.TapEvent) { + _showTapText(); + } + })); + } - _subscriptions// - .add(bindFragment(this, _rxBus.toObserverable())// - .subscribe(new Action1() { - @Override - public void call(Object event) { - if (event instanceof RxBusDemoFragment.TapEvent) { - _showTapText(); - } - } - })); + @Override + public void onStop() { + super.onStop(); + _disposables.clear(); } private void _showTapText() { @@ -62,10 +63,4 @@ private void _showTapText() { _tapEventTxtShow.setAlpha(1f); ViewCompat.animate(_tapEventTxtShow).alphaBy(-1f).setDuration(400); } - - @Override - public void onStop() { - super.onStop(); - _subscriptions.unsubscribe(); - } } diff --git a/app/src/main/java/com/morihacky/android/rxjava/rxbus/RxBusDemo_Bottom2Fragment.java b/app/src/main/java/com/morihacky/android/rxjava/rxbus/RxBusDemo_Bottom2Fragment.java index 3b159de0..7cb08f4d 100644 --- a/app/src/main/java/com/morihacky/android/rxjava/rxbus/RxBusDemo_Bottom2Fragment.java +++ b/app/src/main/java/com/morihacky/android/rxjava/rxbus/RxBusDemo_Bottom2Fragment.java @@ -2,40 +2,38 @@ import android.os.Bundle; import android.support.annotation.Nullable; -import android.support.v4.app.Fragment; import android.support.v4.view.ViewCompat; import android.view.LayoutInflater; import android.view.View; import android.view.ViewGroup; import android.widget.TextView; +import butterknife.BindView; import butterknife.ButterKnife; -import butterknife.InjectView; import com.morihacky.android.rxjava.MainActivity; -import com.morihacky.android.rxjava.app.R; +import com.morihacky.android.rxjava.R; +import com.morihacky.android.rxjava.fragments.BaseFragment; +import io.reactivex.Flowable; +import io.reactivex.android.schedulers.AndroidSchedulers; +import io.reactivex.disposables.CompositeDisposable; import java.util.List; import java.util.concurrent.TimeUnit; -import rx.Observable; -import rx.android.schedulers.AndroidSchedulers; -import rx.functions.Action1; -import rx.subscriptions.CompositeSubscription; -import static rx.android.observables.AndroidObservable.bindFragment; +public class RxBusDemo_Bottom2Fragment extends BaseFragment { -public class RxBusDemo_Bottom2Fragment - extends Fragment { + @BindView(R.id.demo_rxbus_tap_txt) + TextView _tapEventTxtShow; - private RxBus _rxBus; - private CompositeSubscription _subscriptions; + @BindView(R.id.demo_rxbus_tap_count) + TextView _tapEventCountShow; - @InjectView(R.id.demo_rxbus_tap_txt) TextView _tapEventTxtShow; - @InjectView(R.id.demo_rxbus_tap_count) TextView _tapEventCountShow; + private RxBus _rxBus; + private CompositeDisposable _disposables; @Override - public View onCreateView(LayoutInflater inflater, - @Nullable ViewGroup container, - @Nullable Bundle savedInstanceState) { + public View onCreateView( + LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) { View layout = inflater.inflate(R.layout.fragment_rxbus_bottom, container, false); - ButterKnife.inject(this, layout); + ButterKnife.bind(this, layout); return layout; } @@ -48,39 +46,34 @@ public void onActivityCreated(@Nullable Bundle savedInstanceState) { @Override public void onStart() { super.onStart(); - _subscriptions = new CompositeSubscription(); - - Observable tapEventEmitter = _rxBus.toObserverable().share(); - - _subscriptions// - .add(bindFragment(this, tapEventEmitter)// - .subscribe(new Action1() { - @Override - public void call(Object event) { - if (event instanceof RxBusDemoFragment.TapEvent) { - _showTapText(); - } - } - })); - - Observable debouncedEmitter = tapEventEmitter.debounce(1, TimeUnit.SECONDS); - Observable> debouncedBufferEmitter = tapEventEmitter.buffer(debouncedEmitter); - - _subscriptions// - .add(debouncedBufferEmitter// - .observeOn(AndroidSchedulers.mainThread())// - .subscribe(new Action1>() { - @Override - public void call(List taps) { - _showTapCount(taps.size()); - } - })); + _disposables = new CompositeDisposable(); + + Flowable tapEventEmitter = _rxBus.asFlowable().share(); + + _disposables.add( + tapEventEmitter.subscribe( + event -> { + if (event instanceof RxBusDemoFragment.TapEvent) { + _showTapText(); + } + })); + + Flowable debouncedEmitter = tapEventEmitter.debounce(1, TimeUnit.SECONDS); + Flowable> debouncedBufferEmitter = tapEventEmitter.buffer(debouncedEmitter); + + _disposables.add( + debouncedBufferEmitter + .observeOn(AndroidSchedulers.mainThread()) + .subscribe( + taps -> { + _showTapCount(taps.size()); + })); } @Override public void onStop() { super.onStop(); - _subscriptions.unsubscribe(); + _disposables.clear(); } // ----------------------------------------------------------------------------------- diff --git a/app/src/main/java/com/morihacky/android/rxjava/rxbus/RxBusDemo_Bottom3Fragment.java b/app/src/main/java/com/morihacky/android/rxjava/rxbus/RxBusDemo_Bottom3Fragment.java index edad963d..d45ec46e 100644 --- a/app/src/main/java/com/morihacky/android/rxjava/rxbus/RxBusDemo_Bottom3Fragment.java +++ b/app/src/main/java/com/morihacky/android/rxjava/rxbus/RxBusDemo_Bottom3Fragment.java @@ -2,42 +2,37 @@ import android.os.Bundle; import android.support.annotation.Nullable; -import android.support.v4.app.Fragment; import android.support.v4.view.ViewCompat; import android.view.LayoutInflater; import android.view.View; import android.view.ViewGroup; import android.widget.TextView; +import butterknife.BindView; import butterknife.ButterKnife; -import butterknife.InjectView; import com.morihacky.android.rxjava.MainActivity; -import com.morihacky.android.rxjava.app.R; -import java.util.List; +import com.morihacky.android.rxjava.R; +import com.morihacky.android.rxjava.fragments.BaseFragment; +import io.reactivex.android.schedulers.AndroidSchedulers; +import io.reactivex.disposables.CompositeDisposable; +import io.reactivex.flowables.ConnectableFlowable; import java.util.concurrent.TimeUnit; -import rx.Observable; -import rx.android.schedulers.AndroidSchedulers; -import rx.functions.Action1; -import rx.functions.Func1; -import rx.observables.ConnectableObservable; -import rx.subscriptions.CompositeSubscription; -import static rx.android.observables.AndroidObservable.bindFragment; +public class RxBusDemo_Bottom3Fragment extends BaseFragment { -public class RxBusDemo_Bottom3Fragment - extends Fragment { + @BindView(R.id.demo_rxbus_tap_txt) + TextView _tapEventTxtShow; - private RxBus _rxBus; - private CompositeSubscription _subscriptions; + @BindView(R.id.demo_rxbus_tap_count) + TextView _tapEventCountShow; - @InjectView(R.id.demo_rxbus_tap_txt) TextView _tapEventTxtShow; - @InjectView(R.id.demo_rxbus_tap_count) TextView _tapEventCountShow; + private RxBus _rxBus; + private CompositeDisposable _disposables; @Override - public View onCreateView(LayoutInflater inflater, - @Nullable ViewGroup container, - @Nullable Bundle savedInstanceState) { + public View onCreateView( + LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) { View layout = inflater.inflate(R.layout.fragment_rxbus_bottom, container, false); - ButterKnife.inject(this, layout); + ButterKnife.bind(this, layout); return layout; } @@ -50,41 +45,35 @@ public void onActivityCreated(@Nullable Bundle savedInstanceState) { @Override public void onStart() { super.onStart(); - _subscriptions = new CompositeSubscription(); - - ConnectableObservable tapEventEmitter = _rxBus.toObserverable().publish(); - - _subscriptions// - .add(bindFragment(this, tapEventEmitter)// - .subscribe(new Action1() { - @Override - public void call(Object event) { - if (event instanceof RxBusDemoFragment.TapEvent) { - _showTapText(); - } - } - })); - - _subscriptions// - .add(tapEventEmitter.publish(new Func1, Observable>>() { - @Override - public Observable> call(Observable stream) { - return stream.buffer(stream.debounce(1, TimeUnit.SECONDS)); - } - }).observeOn(AndroidSchedulers.mainThread()).subscribe(new Action1>() { - @Override - public void call(List taps) { - _showTapCount(taps.size()); - } - })); - - _subscriptions.add(tapEventEmitter.connect()); + _disposables = new CompositeDisposable(); + + ConnectableFlowable tapEventEmitter = _rxBus.asFlowable().publish(); + + _disposables // + .add( + tapEventEmitter.subscribe( + event -> { + if (event instanceof RxBusDemoFragment.TapEvent) { + _showTapText(); + } + })); + + _disposables.add( + tapEventEmitter + .publish(stream -> stream.buffer(stream.debounce(1, TimeUnit.SECONDS))) + .observeOn(AndroidSchedulers.mainThread()) + .subscribe( + taps -> { + _showTapCount(taps.size()); + })); + + _disposables.add(tapEventEmitter.connect()); } @Override public void onStop() { super.onStop(); - _subscriptions.clear(); + _disposables.clear(); } // ----------------------------------------------------------------------------------- diff --git a/app/src/main/java/com/morihacky/android/rxjava/rxbus/RxBusDemo_TopFragment.java b/app/src/main/java/com/morihacky/android/rxjava/rxbus/RxBusDemo_TopFragment.java index 53a70434..7d6c58fb 100644 --- a/app/src/main/java/com/morihacky/android/rxjava/rxbus/RxBusDemo_TopFragment.java +++ b/app/src/main/java/com/morihacky/android/rxjava/rxbus/RxBusDemo_TopFragment.java @@ -2,26 +2,24 @@ import android.os.Bundle; import android.support.annotation.Nullable; -import android.support.v4.app.Fragment; import android.view.LayoutInflater; import android.view.View; import android.view.ViewGroup; import butterknife.ButterKnife; import butterknife.OnClick; import com.morihacky.android.rxjava.MainActivity; -import com.morihacky.android.rxjava.app.R; +import com.morihacky.android.rxjava.R; +import com.morihacky.android.rxjava.fragments.BaseFragment; -public class RxBusDemo_TopFragment - extends Fragment { +public class RxBusDemo_TopFragment extends BaseFragment { private RxBus _rxBus; @Override - public View onCreateView(LayoutInflater inflater, - @Nullable ViewGroup container, - @Nullable Bundle savedInstanceState) { + public View onCreateView( + LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) { View layout = inflater.inflate(R.layout.fragment_rxbus_top, container, false); - ButterKnife.inject(this, layout); + ButterKnife.bind(this, layout); return layout; } diff --git a/app/src/main/java/com/morihacky/android/rxjava/volley/MyVolley.java b/app/src/main/java/com/morihacky/android/rxjava/volley/MyVolley.java new file mode 100644 index 00000000..a6ec55cf --- /dev/null +++ b/app/src/main/java/com/morihacky/android/rxjava/volley/MyVolley.java @@ -0,0 +1,28 @@ +package com.morihacky.android.rxjava.volley; + +import android.content.Context; +import com.android.volley.RequestQueue; +import com.android.volley.toolbox.Volley; + +/** + * Helper class that is used to provide references to initialized RequestQueue(s) and ImageLoader(s) + */ +public class MyVolley { + private static RequestQueue mRequestQueue; + + private MyVolley() { + // no instances + } + + public static void init(Context context) { + mRequestQueue = Volley.newRequestQueue(context); + } + + static RequestQueue getRequestQueue() { + if (mRequestQueue != null) { + return mRequestQueue; + } else { + throw new IllegalStateException("RequestQueue not initialized"); + } + } +} diff --git a/app/src/main/java/com/morihacky/android/rxjava/volley/VolleyDemoFragment.java b/app/src/main/java/com/morihacky/android/rxjava/volley/VolleyDemoFragment.java new file mode 100644 index 00000000..aaa55d08 --- /dev/null +++ b/app/src/main/java/com/morihacky/android/rxjava/volley/VolleyDemoFragment.java @@ -0,0 +1,180 @@ +package com.morihacky.android.rxjava.volley; + +import android.os.Bundle; +import android.os.Handler; +import android.os.Looper; +import android.support.annotation.Nullable; +import android.util.Log; +import android.view.LayoutInflater; +import android.view.View; +import android.view.ViewGroup; +import android.widget.ListView; +import butterknife.BindView; +import butterknife.ButterKnife; +import butterknife.OnClick; +import com.android.volley.Request; +import com.android.volley.VolleyError; +import com.android.volley.toolbox.JsonObjectRequest; +import com.android.volley.toolbox.RequestFuture; +import com.morihacky.android.rxjava.R; +import com.morihacky.android.rxjava.fragments.BaseFragment; +import com.morihacky.android.rxjava.wiring.LogAdapter; + +import butterknife.Unbinder; +import io.reactivex.Flowable; +import io.reactivex.android.schedulers.AndroidSchedulers; +import io.reactivex.disposables.CompositeDisposable; +import io.reactivex.schedulers.Schedulers; +import io.reactivex.subscribers.DisposableSubscriber; +import java.nio.charset.Charset; +import java.util.ArrayList; +import java.util.List; +import java.util.concurrent.ExecutionException; +import org.json.JSONObject; +import timber.log.Timber; + +public class VolleyDemoFragment extends BaseFragment { + + public static final String TAG = "VolleyDemoFragment"; + + @BindView(R.id.list_threading_log) + ListView _logsList; + + private List _logs; + private LogAdapter _adapter; + private Unbinder unbinder; + + private CompositeDisposable _disposables = new CompositeDisposable(); + + @Override + public View onCreateView( + LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) { + View layout = inflater.inflate(R.layout.fragment_volley, container, false); + unbinder = ButterKnife.bind(this, layout); + return layout; + } + + @Override + public void onActivityCreated(@Nullable Bundle savedInstanceState) { + super.onActivityCreated(savedInstanceState); + _setupLogger(); + } + + @Override + public void onPause() { + super.onPause(); + _disposables.clear(); + } + + @Override + public void onDestroyView() { + super.onDestroyView(); + unbinder.unbind(); + } + + /** + * Creates and returns an observable generated from the Future returned from {@code + * getRouteData()}. The observable can then be subscribed to as shown in {@code + * startVolleyRequest()} + * + * @return Observable + */ + public Flowable newGetRouteData() { + return Flowable.defer( + () -> { + try { + return Flowable.just(getRouteData()); + } catch (InterruptedException | ExecutionException e) { + Log.e("routes", e.getMessage()); + return Flowable.error(e); + } + }); + } + + @OnClick(R.id.btn_start_operation) + void startRequest() { + startVolleyRequest(); + } + + private void startVolleyRequest() { + DisposableSubscriber d = + new DisposableSubscriber() { + @Override + public void onNext(JSONObject jsonObject) { + Log.e(TAG, "onNext " + jsonObject.toString()); + _log("onNext " + jsonObject.toString()); + } + + @Override + public void onError(Throwable e) { + VolleyError cause = (VolleyError) e.getCause(); + String s = new String(cause.networkResponse.data, Charset.forName("UTF-8")); + Log.e(TAG, s); + Log.e(TAG, cause.toString()); + _log("onError " + s); + } + + @Override + public void onComplete() { + Log.e(TAG, "onCompleted"); + Timber.d("----- onCompleted"); + _log("onCompleted "); + } + }; + + newGetRouteData() + .subscribeOn(Schedulers.io()) + .observeOn(AndroidSchedulers.mainThread()) + .subscribe(d); + + _disposables.add(d); + } + + /** + * Converts the Asynchronous Request into a Synchronous Future that can be used to block via + * {@code Future.get()}. Observables require blocking/synchronous functions + * + * @return JSONObject + * @throws ExecutionException + * @throws InterruptedException + */ + private JSONObject getRouteData() throws ExecutionException, InterruptedException { + RequestFuture future = RequestFuture.newFuture(); + String url = "http://www.weather.com.cn/adat/sk/101010100.html"; + JsonObjectRequest req = new JsonObjectRequest(Request.Method.GET, url, future, future); + MyVolley.getRequestQueue().add(req); + return future.get(); + } + + // ----------------------------------------------------------------------------------- + // Methods that help wiring up the example (irrelevant to RxJava) + + private void _setupLogger() { + _logs = new ArrayList<>(); + _adapter = new LogAdapter(getActivity(), new ArrayList<>()); + _logsList.setAdapter(_adapter); + } + + private void _log(String logMsg) { + + if (_isCurrentlyOnMainThread()) { + _logs.add(0, logMsg + " (main thread) "); + _adapter.clear(); + _adapter.addAll(_logs); + } else { + _logs.add(0, logMsg + " (NOT main thread) "); + + // You can only do below stuff on main thread. + new Handler(Looper.getMainLooper()) + .post( + () -> { + _adapter.clear(); + _adapter.addAll(_logs); + }); + } + } + + private boolean _isCurrentlyOnMainThread() { + return Looper.myLooper() == Looper.getMainLooper(); + } +} diff --git a/app/src/main/java/com/morihacky/android/rxjava/wiring/LogAdapter.java b/app/src/main/java/com/morihacky/android/rxjava/wiring/LogAdapter.java new file mode 100644 index 00000000..cfa108f1 --- /dev/null +++ b/app/src/main/java/com/morihacky/android/rxjava/wiring/LogAdapter.java @@ -0,0 +1,13 @@ +package com.morihacky.android.rxjava.wiring; + +import android.content.Context; +import android.widget.ArrayAdapter; +import com.morihacky.android.rxjava.R; +import java.util.List; + +public class LogAdapter extends ArrayAdapter { + + public LogAdapter(Context context, List logs) { + super(context, R.layout.item_log, R.id.item_log, logs); + } +} diff --git a/app/src/main/kotlin/com/morihacky/android/rxjava/ext/RxExt.kt b/app/src/main/kotlin/com/morihacky/android/rxjava/ext/RxExt.kt new file mode 100644 index 00000000..9c99ed69 --- /dev/null +++ b/app/src/main/kotlin/com/morihacky/android/rxjava/ext/RxExt.kt @@ -0,0 +1,11 @@ +package com.morihacky.android.rxjava.ext + +import io.reactivex.disposables.CompositeDisposable +import io.reactivex.disposables.Disposable + +operator fun CompositeDisposable.plus(disposable: Disposable): CompositeDisposable { + add(disposable) + return this +} + + diff --git a/app/src/main/kotlin/com/morihacky/android/rxjava/fragments/MulticastPlaygroundFragment.kt b/app/src/main/kotlin/com/morihacky/android/rxjava/fragments/MulticastPlaygroundFragment.kt new file mode 100644 index 00000000..5ece0e32 --- /dev/null +++ b/app/src/main/kotlin/com/morihacky/android/rxjava/fragments/MulticastPlaygroundFragment.kt @@ -0,0 +1,166 @@ +package com.morihacky.android.rxjava.fragments + +import android.content.Context +import android.os.Bundle +import android.os.Handler +import android.os.Looper +import android.view.LayoutInflater +import android.view.View +import android.view.ViewGroup +import android.widget.* +import butterknife.BindView +import butterknife.ButterKnife +import butterknife.OnClick +import com.jakewharton.rx.replayingShare +import com.morihacky.android.rxjava.R +import io.reactivex.Observable +import io.reactivex.disposables.Disposable +import java.util.concurrent.TimeUnit + +class MulticastPlaygroundFragment : BaseFragment() { + + @BindView(R.id.list_threading_log) lateinit var logList: ListView + @BindView(R.id.dropdown) lateinit var pickOperatorDD: Spinner + @BindView(R.id.msg_text) lateinit var messageText: TextView + + private lateinit var sharedObservable: Observable + private lateinit var adapter: LogAdapter + + private var logs: MutableList = ArrayList() + private var disposable1: Disposable? = null + private var disposable2: Disposable? = null + + override fun onCreateView(inflater: LayoutInflater?, + container: ViewGroup?, + savedInstanceState: Bundle?): View? { + val layout = inflater!!.inflate(R.layout.fragment_multicast_playground, container, false) + ButterKnife.bind(this, layout) + + _setupLogger() + _setupDropdown() + + return layout + } + + @OnClick(R.id.btn_1) + fun onBtn1Click() { + + disposable1?.let { + it.dispose() + _log("subscriber 1 disposed") + disposable1 = null + return + } + + disposable1 = + sharedObservable + .doOnSubscribe { _log("subscriber 1 (subscribed)") } + .subscribe({ long -> _log("subscriber 1: onNext $long") }) + + } + + @OnClick(R.id.btn_2) + fun onBtn2Click() { + disposable2?.let { + it.dispose() + _log("subscriber 2 disposed") + disposable2 = null + return + } + + disposable2 = + sharedObservable + .doOnSubscribe { _log("subscriber 2 (subscribed)") } + .subscribe({ long -> _log("subscriber 2: onNext $long") }) + } + + @OnClick(R.id.btn_3) + fun onBtn3Click() { + logs = ArrayList() + adapter.clear() + } + + // ----------------------------------------------------------------------------------- + // Method that help wiring up the example (irrelevant to RxJava) + + private fun _log(logMsg: String) { + + if (_isCurrentlyOnMainThread()) { + logs.add(0, logMsg + " (main thread) ") + adapter.clear() + adapter.addAll(logs) + } else { + logs.add(0, logMsg + " (NOT main thread) ") + + // You can only do below stuff on main thread. + Handler(Looper.getMainLooper()).post { + adapter.clear() + adapter.addAll(logs) + } + } + } + + private fun _setupLogger() { + logs = ArrayList() + adapter = LogAdapter(activity, ArrayList()) + logList.adapter = adapter + } + + private fun _setupDropdown() { + pickOperatorDD.adapter = ArrayAdapter(context, + android.R.layout.simple_spinner_dropdown_item, + arrayOf(".publish().refCount()", + ".publish().autoConnect(2)", + ".replay(1).autoConnect(2)", + ".replay(1).refCount()", + ".replayingShare()")) + + + pickOperatorDD.onItemSelectedListener = object : AdapterView.OnItemSelectedListener { + + override fun onItemSelected(p0: AdapterView<*>?, p1: View?, index: Int, p3: Long) { + + val sourceObservable = Observable.interval(0L, 3, TimeUnit.SECONDS) + .doOnSubscribe { _log("observer (subscribed)") } + .doOnDispose { _log("observer (disposed)") } + .doOnTerminate { _log("observer (terminated)") } + + sharedObservable = + when (index) { + 0 -> { + messageText.setText(R.string.msg_demo_multicast_publishRefCount) + sourceObservable.publish().refCount() + } + 1 -> { + messageText.setText(R.string.msg_demo_multicast_publishAutoConnect) + sourceObservable.publish().autoConnect(2) + } + 2 -> { + messageText.setText(R.string.msg_demo_multicast_replayAutoConnect) + sourceObservable.replay(1).autoConnect(2) + } + 3 -> { + messageText.setText(R.string.msg_demo_multicast_replayRefCount) + sourceObservable.replay(1).refCount() + } + 4 -> { + messageText.setText(R.string.msg_demo_multicast_replayingShare) + sourceObservable.replayingShare() + } + else -> throw RuntimeException("got to pick an op yo!") + } + } + + override fun onNothingSelected(p0: AdapterView<*>?) {} + } + } + + private fun _isCurrentlyOnMainThread(): Boolean { + return Looper.myLooper() == Looper.getMainLooper() + } + + private inner class LogAdapter(context: Context, logs: List) : + ArrayAdapter(context, R.layout.item_log, R.id.item_log, logs) + +} + diff --git a/app/src/main/kotlin/com/morihacky/android/rxjava/fragments/PlaygroundFragment.kt b/app/src/main/kotlin/com/morihacky/android/rxjava/fragments/PlaygroundFragment.kt new file mode 100644 index 00000000..cf77e04f --- /dev/null +++ b/app/src/main/kotlin/com/morihacky/android/rxjava/fragments/PlaygroundFragment.kt @@ -0,0 +1,67 @@ +package com.morihacky.android.rxjava.fragments + +import android.content.Context +import android.os.Bundle +import android.os.Handler +import android.os.Looper +import android.view.LayoutInflater +import android.view.View +import android.view.ViewGroup +import android.widget.ArrayAdapter +import android.widget.ListView +import com.morihacky.android.rxjava.R + +class PlaygroundFragment : BaseFragment() { + + private var _logsList: ListView? = null + private var _adapter: LogAdapter? = null + + private var _logs: MutableList = ArrayList() + + override fun onCreateView(inflater: LayoutInflater?, + container: ViewGroup?, + savedInstanceState: Bundle?): View? { + val view = inflater?.inflate(R.layout.fragment_concurrency_schedulers, container, false) + + _logsList = view?.findViewById(R.id.list_threading_log) as ListView + _setupLogger() + + view.findViewById(R.id.btn_start_operation).setOnClickListener { _ -> + _log("Button clicked") + } + + return view + } + + // ----------------------------------------------------------------------------------- + // Method that help wiring up the example (irrelevant to RxJava) + + private fun _log(logMsg: String) { + + if (_isCurrentlyOnMainThread()) { + _logs.add(0, logMsg + " (main thread) ") + _adapter?.clear() + _adapter?.addAll(_logs) + } else { + _logs.add(0, logMsg + " (NOT main thread) ") + + // You can only do below stuff on main thread. + Handler(Looper.getMainLooper()).post { + _adapter?.clear() + _adapter?.addAll(_logs) + } + } + } + + private fun _setupLogger() { + _logs = ArrayList() + _adapter = LogAdapter(activity, ArrayList()) + _logsList?.adapter = _adapter + } + + private fun _isCurrentlyOnMainThread(): Boolean { + return Looper.myLooper() == Looper.getMainLooper() + } + + private inner class LogAdapter(context: Context, logs: List) : ArrayAdapter(context, R.layout.item_log, R.id.item_log, logs) +} \ No newline at end of file diff --git a/app/src/main/kotlin/com/morihacky/android/rxjava/fragments/UsingFragment.kt b/app/src/main/kotlin/com/morihacky/android/rxjava/fragments/UsingFragment.kt new file mode 100644 index 00000000..d268609d --- /dev/null +++ b/app/src/main/kotlin/com/morihacky/android/rxjava/fragments/UsingFragment.kt @@ -0,0 +1,93 @@ +package com.morihacky.android.rxjava.fragments + +import android.content.Context +import android.os.Bundle +import android.os.Handler +import android.os.Looper +import android.view.LayoutInflater +import android.view.View +import android.view.ViewGroup +import android.widget.ArrayAdapter +import android.widget.ListView +import android.widget.TextView +import com.morihacky.android.rxjava.R +import io.reactivex.Flowable +import io.reactivex.functions.Consumer +import io.reactivex.functions.Function +import org.reactivestreams.Publisher +import java.util.* +import java.util.concurrent.Callable + +class UsingFragment : BaseFragment() { + + private lateinit var _logs: MutableList + private lateinit var _logsList: ListView + private lateinit var _adapter: UsingFragment.LogAdapter + + override fun onCreateView(inflater: LayoutInflater?, container: ViewGroup?, savedInstanceState: Bundle?): View? { + val view = inflater?.inflate(R.layout.fragment_buffer, container, false) + _logsList = view?.findViewById(R.id.list_threading_log) as ListView + + (view.findViewById(R.id.text_description) as TextView).setText(R.string.msg_demo_using) + + _setupLogger() + view.findViewById(R.id.btn_start_operation).setOnClickListener { executeUsingOperation() } + return view + } + + private fun executeUsingOperation() { + val resourceSupplier = Callable { Realm() } + val sourceSupplier = Function> { realm -> + Flowable.just(true) + .map { + realm.doSomething() + // i would use the copyFromRealm and change it to a POJO + Random().nextInt(50) + } + } + val disposer = Consumer { realm -> + realm.clear() + } + + Flowable.using(resourceSupplier, sourceSupplier, disposer) + .subscribe({ i -> + _log("got a value $i - (look at the logs)") + }) + } + + inner class Realm { + init { + _log("initializing Realm instance") + } + + fun doSomething() { + _log("do something with Realm instance") + } + + fun clear() { + // notice how this is called even before you manually "dispose" + _log("cleaning up the resources (happens before a manual 'dispose'") + } + } + + // ----------------------------------------------------------------------------------- + // Method that help wiring up the example (irrelevant to RxJava) + + private fun _log(logMsg: String) { + _logs.add(0, logMsg) + + // You can only do below stuff on main thread. + Handler(Looper.getMainLooper()).post { + _adapter.clear() + _adapter.addAll(_logs) + } + } + + private fun _setupLogger() { + _logs = ArrayList() + _adapter = LogAdapter(activity, ArrayList()) + _logsList.adapter = _adapter + } + + private class LogAdapter(context: Context, logs: List) : ArrayAdapter(context, R.layout.item_log, R.id.item_log, logs) +} \ No newline at end of file diff --git a/app/src/main/res/drawable/btn_round.xml b/app/src/main/res/drawable/btn_round.xml index ac7ba8f8..55ff6d2b 100644 --- a/app/src/main/res/drawable/btn_round.xml +++ b/app/src/main/res/drawable/btn_round.xml @@ -1,9 +1,12 @@ - - + android:shape="rectangle" + > + + \ No newline at end of file diff --git a/app/src/main/res/layout/activity_main.xml b/app/src/main/res/layout/activity_main.xml deleted file mode 100644 index 438a8d65..00000000 --- a/app/src/main/res/layout/activity_main.xml +++ /dev/null @@ -1,5 +0,0 @@ - diff --git a/app/src/main/res/layout/fragment_buffer.xml b/app/src/main/res/layout/fragment_buffer.xml index 7839dacd..3464ac5b 100644 --- a/app/src/main/res/layout/fragment_buffer.xml +++ b/app/src/main/res/layout/fragment_buffer.xml @@ -1,17 +1,19 @@ - + xmlns:android="http://schemas.android.com/apk/res/android" + > + android:text="@string/msg_demo_buffer" + />