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Jetpack/architecture/2.ViewBinding简介.md

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@@ -22,11 +22,11 @@ android {
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```xml
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<LinearLayout ... >
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<TextView android:id="@+id/name" />
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<ImageView android:cropToPadding="true" />
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<Button android:id="@+id/button"
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android:background="@drawable/rounded_button" />
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</LinearLayout>
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<TextView android:id="@+id/name" />
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<ImageView android:cropToPadding="true" />
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<Button android:id="@+id/button"
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android:background="@drawable/rounded_button" />
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</LinearLayout>
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```
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所生成的绑定类的名称就为ResultProfileBinding。此类具有两个字段:一个是名为name的TextView,另一个是名为button的Button。该布局中的ImageView没有ID,因此绑定类中不存在对它的引用。
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@@ -36,11 +36,10 @@ android {
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如果你希望在生成绑定类时忽略某个布局文件,可以将tools:viewBindingIgnore="true"属性添加到相应布局文件的根视图中:
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```xml
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<LinearLayout
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...
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tools:viewBindingIgnore="true" >
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...
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</LinearLayout>
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...
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tools:viewBindingIgnore="true" >
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...
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</LinearLayout>
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```
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### 2.代码中使用
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```
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这个时候即使我们对include指定了id,在ViewBinding中也不会像普通include那样生成获取对应id的变量。这种情况下,我们需要使用placeholder.xml自动生成的PlaceholderBinding类,然后调用它的bind()方法。
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```kotlin
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override fun onCreateView(inflater: LayoutInflater, container: ViewGroup?, savedInstanceState: Bundle?): View {
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binding = FragmentOrderBinding.inflate(layoutInflater, container, false)
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placeholderBinding = PlaceholderBinding.bind(binding.root)
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placeholderBinding.tvPlaceholder.text = getString(R.string.please_wait)
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return binding.root
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}
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override fun onCreateView(inflater: LayoutInflater, container: ViewGroup?, savedInstanceState: Bundle?): View {
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binding = FragmentOrderBinding.inflate(layoutInflater, container, false)
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placeholderBinding = PlaceholderBinding.bind(binding.root)
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placeholderBinding.tvPlaceholder.text = getString(R.string.please_wait)
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return binding.root
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}
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```
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### View Binding 的传统使用方式
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- [Make Android View Binding great with Kotlin](https://proandroiddev.com/make-android-view-binding-great-with-kotlin-b71dd9c87719)
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- [How to Simplify your Android View Binding Delegation](https://medium.com/easyread/how-to-simplify-your-android-view-binding-delegation-d07812b2a616)
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## 目录
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- [上一篇:1.简介](https://github.com/CharonChui/AndroidNote/blob/master/Jetpack/architecture/1.%E7%AE%80%E4%BB%8B.md)
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- [下一篇:3.Lifecycle简介](https://github.com/CharonChui/AndroidNote/blob/master/Jetpack/architecture/3.Lifecycle%E7%AE%80%E4%BB%8B.md)

SourceAnalysis/Activity启动过程.md

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@@ -3,7 +3,7 @@ Activity启动过程
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前两天面试了天猫的开发,被问到了`Activity`启动过程,不懂啊....
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![](https://raw.githubusercontent.com/CharonChui/Pictures/master/app launch summary.jpg)
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![](https://raw.githubusercontent.com/CharonChui/Pictures/master/app%20launch%20summary.jpg)
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今天就来分析一下,我们开启`Activity`主要有两种方式:
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---
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- 邮箱 :charon.chui@gmail.com
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- Good Luck!
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- Good Luck!

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