From e0b601cda2a89662fe5b07e1da438e659b0f269c Mon Sep 17 00:00:00 2001
From: Mykhailo Shchurov <shchurov.m@gmail.com>
Date: Sun, 3 Apr 2016 00:13:31 +0300
Subject: [PATCH] Saving view states

---
 .../view/fragment/UserDetailsFragment.java    | 39 ++++++++++++++++--
 .../view/fragment/UserListFragment.java       | 40 +++++++++++++++++--
 2 files changed, 73 insertions(+), 6 deletions(-)

diff --git a/presentation/src/main/java/com/fernandocejas/android10/sample/presentation/view/fragment/UserDetailsFragment.java b/presentation/src/main/java/com/fernandocejas/android10/sample/presentation/view/fragment/UserDetailsFragment.java
index e5c51334..bcdf106a 100644
--- a/presentation/src/main/java/com/fernandocejas/android10/sample/presentation/view/fragment/UserDetailsFragment.java
+++ b/presentation/src/main/java/com/fernandocejas/android10/sample/presentation/view/fragment/UserDetailsFragment.java
@@ -12,22 +12,30 @@
 import android.widget.Button;
 import android.widget.RelativeLayout;
 import android.widget.TextView;
-import butterknife.Bind;
-import butterknife.ButterKnife;
-import butterknife.OnClick;
+
 import com.fernandocejas.android10.sample.presentation.R;
 import com.fernandocejas.android10.sample.presentation.internal.di.components.UserComponent;
 import com.fernandocejas.android10.sample.presentation.model.UserModel;
 import com.fernandocejas.android10.sample.presentation.presenter.UserDetailsPresenter;
 import com.fernandocejas.android10.sample.presentation.view.UserDetailsView;
 import com.fernandocejas.android10.sample.presentation.view.component.AutoLoadImageView;
+
 import javax.inject.Inject;
 
+import butterknife.Bind;
+import butterknife.ButterKnife;
+import butterknife.OnClick;
+
 /**
  * Fragment that shows details of a certain user.
  */
 public class UserDetailsFragment extends BaseFragment implements UserDetailsView {
 
+  private static final String INSTANCE_STATE_PARAM_SHOW_LOADING
+          = "org.android10.STATE_PARAM_SHOW_LOADING";
+  private static final String INSTANCE_STATE_PARAM_SHOW_RETRY
+          = "org.android10.STATE_PARAM_SHOW_RETRY";
+
   @Inject UserDetailsPresenter userDetailsPresenter;
 
   @Bind(R.id.iv_cover) AutoLoadImageView iv_cover;
@@ -63,6 +71,22 @@ public UserDetailsFragment() {
     }
   }
 
+  @Override
+  public void onViewStateRestored(Bundle savedInstanceState) {
+    super.onViewStateRestored(savedInstanceState);
+    if (savedInstanceState == null) {
+      return;
+    }
+    boolean loadingVisible = savedInstanceState.getBoolean(INSTANCE_STATE_PARAM_SHOW_LOADING);
+    boolean retryVisible = savedInstanceState.getBoolean(INSTANCE_STATE_PARAM_SHOW_RETRY);
+    if (loadingVisible) {
+      showLoading();
+    }
+    if (retryVisible) {
+      showRetry();
+    }
+  }
+
   @Override public void onResume() {
     super.onResume();
     this.userDetailsPresenter.resume();
@@ -73,6 +97,15 @@ public UserDetailsFragment() {
     this.userDetailsPresenter.pause();
   }
 
+  @Override
+  public void onSaveInstanceState(Bundle outState) {
+    super.onSaveInstanceState(outState);
+    boolean loadingVisible = rl_progress.getVisibility() == View.VISIBLE;
+    boolean retryVisible = rl_retry.getVisibility() == View.VISIBLE;
+    outState.putBoolean(INSTANCE_STATE_PARAM_SHOW_LOADING, loadingVisible);
+    outState.putBoolean(INSTANCE_STATE_PARAM_SHOW_RETRY, retryVisible);
+  }
+
   @Override public void onDestroyView() {
     super.onDestroyView();
     ButterKnife.unbind(this);
diff --git a/presentation/src/main/java/com/fernandocejas/android10/sample/presentation/view/fragment/UserListFragment.java b/presentation/src/main/java/com/fernandocejas/android10/sample/presentation/view/fragment/UserListFragment.java
index 6da47c9a..35126ce4 100644
--- a/presentation/src/main/java/com/fernandocejas/android10/sample/presentation/view/fragment/UserListFragment.java
+++ b/presentation/src/main/java/com/fernandocejas/android10/sample/presentation/view/fragment/UserListFragment.java
@@ -14,9 +14,7 @@
 import android.view.ViewGroup;
 import android.widget.Button;
 import android.widget.RelativeLayout;
-import butterknife.Bind;
-import butterknife.ButterKnife;
-import butterknife.OnClick;
+
 import com.fernandocejas.android10.sample.presentation.R;
 import com.fernandocejas.android10.sample.presentation.internal.di.components.UserComponent;
 import com.fernandocejas.android10.sample.presentation.model.UserModel;
@@ -24,14 +22,25 @@
 import com.fernandocejas.android10.sample.presentation.view.UserListView;
 import com.fernandocejas.android10.sample.presentation.view.adapter.UsersAdapter;
 import com.fernandocejas.android10.sample.presentation.view.adapter.UsersLayoutManager;
+
 import java.util.Collection;
+
 import javax.inject.Inject;
 
+import butterknife.Bind;
+import butterknife.ButterKnife;
+import butterknife.OnClick;
+
 /**
  * Fragment that shows a list of Users.
  */
 public class UserListFragment extends BaseFragment implements UserListView {
 
+  private static final String INSTANCE_STATE_PARAM_SHOW_LOADING
+          = "org.android10.STATE_PARAM_SHOW_LOADING";
+  private static final String INSTANCE_STATE_PARAM_SHOW_RETRY
+          = "org.android10.STATE_PARAM_SHOW_RETRY";
+
   /**
    * Interface for listening user list events.
    */
@@ -81,6 +90,22 @@ public UserListFragment() {
     }
   }
 
+  @Override
+  public void onViewStateRestored(Bundle savedInstanceState) {
+    super.onViewStateRestored(savedInstanceState);
+    if (savedInstanceState == null) {
+      return;
+    }
+    boolean loadingVisible = savedInstanceState.getBoolean(INSTANCE_STATE_PARAM_SHOW_LOADING);
+    boolean retryVisible = savedInstanceState.getBoolean(INSTANCE_STATE_PARAM_SHOW_RETRY);
+    if (loadingVisible) {
+      showLoading();
+    }
+    if (retryVisible) {
+      showRetry();
+    }
+  }
+
   @Override public void onResume() {
     super.onResume();
     this.userListPresenter.resume();
@@ -91,6 +116,15 @@ public UserListFragment() {
     this.userListPresenter.pause();
   }
 
+  @Override
+  public void onSaveInstanceState(Bundle outState) {
+    super.onSaveInstanceState(outState);
+    boolean loadingVisible = rl_progress.getVisibility() == View.VISIBLE;
+    boolean retryVisible = rl_retry.getVisibility() == View.VISIBLE;
+    outState.putBoolean(INSTANCE_STATE_PARAM_SHOW_LOADING, loadingVisible);
+    outState.putBoolean(INSTANCE_STATE_PARAM_SHOW_RETRY, retryVisible);
+  }
+
   @Override public void onDestroyView() {
     super.onDestroyView();
     rv_users.setAdapter(null);