Lazy mode in ViewUserDetailActivity. Fixed follow chip background color in dark mode in ViewUserDetailActivity. Fixed force stop after orientation change in ViewUserDetailActivity.

app/src/main/java/ml/docilealligator/infinityforreddit/ViewSubredditDetailActivity.java

@@ -8,9 +8,9 @@ import android.view.Menu;
 import android.view.MenuItem;
 import android.view.View;
 import android.view.ViewGroup;
-import android.widget.ImageView;
 import android.widget.TextView;
 
+import androidx.annotation.NonNull;
 import androidx.appcompat.app.AppCompatActivity;
 import androidx.appcompat.widget.Toolbar;
 import androidx.coordinatorlayout.widget.CoordinatorLayout;
@@ -45,7 +45,7 @@ public class ViewSubredditDetailActivity extends AppCompatActivity {
     private static final String FRAGMENT_OUT_STATE_KEY = "FOSK";
 
     @BindView(R.id.coordinator_layout_view_subreddit_detail_activity) CoordinatorLayout coordinatorLayout;
-    @BindView(R.id.banner_image_view_view_subreddit_detail_activity) ImageView bannerImageView;
+    @BindView(R.id.banner_image_view_view_subreddit_detail_activity) GifImageView bannerImageView;
     @BindView(R.id.icon_gif_image_view_view_subreddit_detail_activity) GifImageView iconGifImageView;
     @BindView(R.id.subscribe_subreddit_chip_view_subreddit_detail_activity) Chip subscribeSubredditChip;
     @BindView(R.id.subreddit_name_text_view_view_subreddit_detail_activity) TextView subredditNameTextView;
@@ -238,6 +238,13 @@ public class ViewSubredditDetailActivity extends AppCompatActivity {
             getSupportFragmentManager().beginTransaction().replace(R.id.frame_layout_view_subreddit_detail_activity, mFragment).commit();
         } else {
             mFragment = getSupportFragmentManager().getFragment(savedInstanceState, FRAGMENT_OUT_STATE_KEY);
+            if(mFragment == null) {
+                mFragment = new PostFragment();
+                Bundle bundle = new Bundle();
+                bundle.putString(PostFragment.NAME_KEY, subredditName);
+                bundle.putInt(PostFragment.POST_TYPE_KEY, PostDataSource.TYPE_SUBREDDIT);
+                mFragment.setArguments(bundle);
+            }
             getSupportFragmentManager().beginTransaction().replace(R.id.frame_layout_view_subreddit_detail_activity, mFragment).commit();
         }
     }
@@ -263,12 +270,10 @@ public class ViewSubredditDetailActivity extends AppCompatActivity {
     }
 
     @Override
-    protected void onSaveInstanceState(Bundle outState) {
+    protected void onSaveInstanceState(@NonNull Bundle outState) {
         super.onSaveInstanceState(outState);
-        if(mFragment != null) {
         getSupportFragmentManager().putFragment(outState, FRAGMENT_OUT_STATE_KEY, mFragment);
     }
-    }
 
     private void makeSnackbar(int resId) {
         Snackbar.make(coordinatorLayout, resId, Snackbar.LENGTH_SHORT).show();

app/src/main/java/ml/docilealligator/infinityforreddit/ViewUserDetailActivity.java

@@ -4,12 +4,13 @@ import android.content.Intent;
 import android.content.SharedPreferences;
 import android.os.AsyncTask;
 import android.os.Bundle;
+import android.view.Menu;
 import android.view.MenuItem;
 import android.view.View;
 import android.view.ViewGroup;
-import android.widget.ImageView;
 import android.widget.TextView;
 
+import androidx.annotation.NonNull;
 import androidx.appcompat.app.AppCompatActivity;
 import androidx.appcompat.widget.Toolbar;
 import androidx.coordinatorlayout.widget.CoordinatorLayout;
@@ -19,6 +20,8 @@ import androidx.lifecycle.ViewModelProviders;
 import com.bumptech.glide.Glide;
 import com.bumptech.glide.RequestManager;
 import com.bumptech.glide.request.RequestOptions;
+import com.google.android.material.appbar.AppBarLayout;
+import com.google.android.material.appbar.CollapsingToolbarLayout;
 import com.google.android.material.chip.Chip;
 import com.google.android.material.snackbar.Snackbar;
 
@@ -42,9 +45,12 @@ public class ViewUserDetailActivity extends AppCompatActivity {
     static final String EXTRA_USER_NAME_KEY = "EUNK";
 
     private static final String FRAGMENT_OUT_STATE_KEY = "FOSK";
+    private static final String IS_IN_LAZY_MODE_STATE = "IILMS";
 
     @BindView(R.id.coordinator_layout_view_user_detail_activity) CoordinatorLayout coordinatorLayout;
-    @BindView(R.id.banner_image_view_view_user_detail_activity) ImageView bannerImageView;
+    @BindView(R.id.appbar_layout_view_user_detail) AppBarLayout appBarLayout;
+    @BindView(R.id.collapsing_toolbar_layout_view_user_detail_activity) CollapsingToolbarLayout collapsingToolbarLayout;
+    @BindView(R.id.banner_image_view_view_user_detail_activity) GifImageView bannerImageView;
     @BindView(R.id.icon_gif_image_view_view_user_detail_activity) GifImageView iconGifImageView;
     @BindView(R.id.user_name_text_view_view_user_detail_activity) TextView userNameTextView;
     @BindView(R.id.subscribe_user_chip_view_user_detail_activity) Chip subscribeUserChip;
@@ -54,8 +60,11 @@ public class ViewUserDetailActivity extends AppCompatActivity {
     private SubscribedUserDao subscribedUserDao;
     private RequestManager glide;
     private UserViewModel userViewModel;
+    private Menu mMenu;
+    private AppBarLayout.LayoutParams params;
 
     private boolean subscriptionReady = false;
+    private boolean isInLazyMode = false;
 
     @Inject
     @Named("no_oauth")
@@ -78,6 +87,8 @@ public class ViewUserDetailActivity extends AppCompatActivity {
 
         ((Infinity) getApplication()).getmAppComponent().inject(this);
 
+        params = (AppBarLayout.LayoutParams) collapsingToolbarLayout.getLayoutParams();
+
         //Get status bar height
         int statusBarHeight = 0;
         int resourceId = getResources().getIdentifier("status_bar_height", "dimen", "android");
@@ -93,6 +104,10 @@ public class ViewUserDetailActivity extends AppCompatActivity {
         toolbar.setTitle(title);
         setSupportActionBar(toolbar);
 
+        if(savedInstanceState != null) {
+            isInLazyMode = savedInstanceState.getBoolean(IS_IN_LAZY_MODE_STATE);
+        }
+
         ViewGroup.MarginLayoutParams params = (ViewGroup.MarginLayoutParams) toolbar.getLayoutParams();
         params.topMargin = statusBarHeight;
 
@@ -169,7 +184,7 @@ public class ViewUserDetailActivity extends AppCompatActivity {
                                             @Override
                                             public void onUserFollowingSuccess() {
                                                 subscribeUserChip.setText(R.string.follow);
-                                                subscribeUserChip.setChipBackgroundColor(getResources().getColorStateList(R.color.colorPrimaryDark));
+                                                subscribeUserChip.setChipBackgroundColor(getResources().getColorStateList(R.color.textColorPrimaryDark));
                                                 makeSnackbar(R.string.unfollowed);
                                                 subscriptionReady = true;
                                             }
@@ -195,7 +210,7 @@ public class ViewUserDetailActivity extends AppCompatActivity {
                         @Override
                         public void isNotSubscribed() {
                             subscribeUserChip.setText(R.string.follow);
-                            subscribeUserChip.setChipBackgroundColor(getResources().getColorStateList(R.color.colorPrimaryDark));
+                            subscribeUserChip.setChipBackgroundColor(getResources().getColorStateList(R.color.textColorPrimaryDark));
                             subscriptionReady = true;
                         }
                     }).execute();
@@ -231,20 +246,77 @@ public class ViewUserDetailActivity extends AppCompatActivity {
             getSupportFragmentManager().beginTransaction().replace(R.id.frame_layout_view_user_detail_activity, mFragment).commit();
         } else {
             mFragment = getSupportFragmentManager().getFragment(savedInstanceState, FRAGMENT_OUT_STATE_KEY);
+            if(mFragment == null) {
+                mFragment = new PostFragment();
+                Bundle bundle = new Bundle();
+                bundle.putString(PostFragment.NAME_KEY, userName);
+                bundle.putInt(PostFragment.POST_TYPE_KEY, PostDataSource.TYPE_USER);
+                mFragment.setArguments(bundle);
+            }
             getSupportFragmentManager().beginTransaction().replace(R.id.frame_layout_view_user_detail_activity, mFragment).commit();
         }
     }
 
+    @Override
+    public boolean onCreateOptionsMenu(Menu menu) {
+        getMenuInflater().inflate(R.menu.view_user_detail_activity, menu);
+        mMenu = menu;
+        MenuItem lazyModeItem = mMenu.findItem(R.id.action_lazy_mode_view_user_detail_activity);
+        if(isInLazyMode) {
+            lazyModeItem.setTitle(R.string.action_stop_lazy_mode);
+            params.setScrollFlags(AppBarLayout.LayoutParams.SCROLL_FLAG_SCROLL | AppBarLayout.LayoutParams.SCROLL_FLAG_EXIT_UNTIL_COLLAPSED);
+            collapsingToolbarLayout.setLayoutParams(params);
+        } else {
+            lazyModeItem.setTitle(R.string.action_start_lazy_mode);
+            params.setScrollFlags(AppBarLayout.LayoutParams.SCROLL_FLAG_SCROLL | AppBarLayout.LayoutParams.SCROLL_FLAG_ENTER_ALWAYS |
+                    AppBarLayout.LayoutParams.SCROLL_FLAG_ENTER_ALWAYS_COLLAPSED);
+            collapsingToolbarLayout.setLayoutParams(params);
+        }
+
+        return true;
+    }
+
     @Override
     public boolean onOptionsItemSelected(MenuItem item) {
         switch (item.getItemId()) {
             case android.R.id.home:
                 finish();
                 return true;
+            case R.id.action_refresh_view_user_detail_activity:
+                if (mFragment instanceof FragmentCommunicator) {
+                    ((FragmentCommunicator) mFragment).refresh();
+                    return true;
+                }
+                break;
+            case R.id.action_lazy_mode_view_user_detail_activity:
+                MenuItem lazyModeItem = mMenu.findItem(R.id.action_lazy_mode_view_user_detail_activity);
+                if(isInLazyMode) {
+                    isInLazyMode = false;
+                    ((FragmentCommunicator) mFragment).stopLazyMode();
+                    lazyModeItem.setTitle(R.string.action_start_lazy_mode);
+                    params.setScrollFlags(AppBarLayout.LayoutParams.SCROLL_FLAG_SCROLL | AppBarLayout.LayoutParams.SCROLL_FLAG_ENTER_ALWAYS |
+                            AppBarLayout.LayoutParams.SCROLL_FLAG_ENTER_ALWAYS_COLLAPSED);
+                    collapsingToolbarLayout.setLayoutParams(params);
+                } else {
+                    isInLazyMode = true;
+                    ((FragmentCommunicator) mFragment).startLazyMode();
+                    lazyModeItem.setTitle(R.string.action_stop_lazy_mode);
+                    appBarLayout.setExpanded(false);
+                    params.setScrollFlags(AppBarLayout.LayoutParams.SCROLL_FLAG_SCROLL | AppBarLayout.LayoutParams.SCROLL_FLAG_EXIT_UNTIL_COLLAPSED);
+                    collapsingToolbarLayout.setLayoutParams(params);
+                }
+                return true;
         }
         return false;
     }
 
+    @Override
+    protected void onSaveInstanceState(@NonNull Bundle outState) {
+        super.onSaveInstanceState(outState);
+        outState.putBoolean(IS_IN_LAZY_MODE_STATE, isInLazyMode);
+        getSupportFragmentManager().putFragment(outState, FRAGMENT_OUT_STATE_KEY, mFragment);
+    }
+
     private void makeSnackbar(int resId) {
         Snackbar.make(coordinatorLayout, resId, Snackbar.LENGTH_SHORT).show();
     }

app/src/main/res/layout/activity_view_subreddit_detail.xml

@@ -24,7 +24,7 @@
                 android:layout_width="match_parent"
                 android:layout_height="match_parent">
 
-                <ImageView
+                <pl.droidsonroids.gif.GifImageView
                     android:id="@+id/banner_image_view_view_subreddit_detail_activity"
                     android:layout_width="match_parent"
                     android:scaleType="centerCrop"

app/src/main/res/layout/activity_view_user_detail.xml

@@ -8,11 +8,13 @@
     tools:context=".ViewUserDetailActivity">
 
     <com.google.android.material.appbar.AppBarLayout
+        android:id="@+id/appbar_layout_view_user_detail"
         android:layout_width="match_parent"
         android:layout_height="wrap_content"
         android:theme="@style/AppTheme.AppBarOverlay">
 
         <com.google.android.material.appbar.CollapsingToolbarLayout
+            android:id="@+id/collapsing_toolbar_layout_view_user_detail_activity"
             android:layout_width="match_parent"
             android:layout_height="match_parent"
             app:titleEnabled="false"
@@ -24,7 +26,7 @@
                 android:layout_width="match_parent"
                 android:layout_height="match_parent">
 
-                <ImageView
+                <pl.droidsonroids.gif.GifImageView
                     android:id="@+id/banner_image_view_view_user_detail_activity"
                     android:layout_width="match_parent"
                     android:scaleType="centerCrop"

app/src/main/res/layout/app_bar_main.xml

@@ -29,7 +29,7 @@
                     android:layout_width="match_parent"
                     android:layout_height="?attr/actionBarSize"
                     app:layout_collapseMode="pin"
-                    app:layout_scrollFlags="scroll|enterAlways|enterAlwaysCollapsed"
+                    app:layout_scrollFlags="scroll|enterAlways"
                     app:popupTheme="@style/AppTheme.PopupOverlay" />
 
                 <com.ferfalk.simplesearchview.SimpleSearchView

app/src/main/res/menu/menu_view_user_detail.xml

@@ -1,10 +0,0 @@
-<menu xmlns:android="http://schemas.android.com/apk/res/android"
-    xmlns:app="http://schemas.android.com/apk/res-auto"
-    xmlns:tools="http://schemas.android.com/tools"
-    tools:context="ml.docilealligator.infinityforreddit.ViewUserDetailActivity">
-    <item
-        android:id="@+id/action_settings"
-        android:orderInCategory="100"
-        android:title="@string/action_settings"
-        app:showAsAction="never" />
-</menu>

app/src/main/res/menu/view_subreddit_detail_activity.xml

@@ -9,4 +9,10 @@
         android:title="@string/action_refresh"
         android:icon="@drawable/ic_refresh_white_24dp"
         app:showAsAction="never" />
+
+    <item
+        android:id="@+id/action_lazy_mode_view_subreddit_detail_activity"
+        android:orderInCategory="2"
+        android:title="@string/action_start_lazy_mode"
+        app:showAsAction="never" />
 </menu>

app/src/main/res/menu/view_user_detail_activity.xml

@@ -0,0 +1,17 @@
+<menu xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:app="http://schemas.android.com/apk/res-auto"
+    xmlns:tools="http://schemas.android.com/tools"
+    tools:context="ml.docilealligator.infinityforreddit.ViewUserDetailActivity">
+    <item
+        android:id="@+id/action_refresh_view_user_detail_activity"
+        android:orderInCategory="1"
+        android:title="@string/action_refresh"
+        android:icon="@drawable/ic_refresh_white_24dp"
+        app:showAsAction="never" />
+
+    <item
+        android:id="@+id/action_lazy_mode_view_user_detail_activity"
+        android:orderInCategory="2"
+        android:title="@string/action_start_lazy_mode"
+        app:showAsAction="never" />
+</menu>