Hide Toolbar when scrolling content up.

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

@@ -20,7 +20,6 @@ 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.CollapsingToolbarLayout;
 import com.google.android.material.chip.Chip;
 import com.google.android.material.snackbar.Snackbar;
 
@@ -93,10 +92,6 @@ public class ViewSubredditDetailActivity extends AppCompatActivity {
         String title = "r/" + subredditName;
         subredditNameTextView.setText(title);
 
-
-        CollapsingToolbarLayout collapsingToolbarLayout = findViewById(R.id.collapsing_toolbar_layout_view_subreddit_detail_activity);
-        collapsingToolbarLayout.setTitleEnabled(false);
-
         Toolbar toolbar = findViewById(R.id.toolbar);
         toolbar.setTitle(title);
         setSupportActionBar(toolbar);

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

@@ -19,7 +19,6 @@ 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.CollapsingToolbarLayout;
 import com.google.android.material.chip.Chip;
 import com.google.android.material.snackbar.Snackbar;
 
@@ -90,9 +89,6 @@ public class ViewUserDetailActivity extends AppCompatActivity {
         String title = "u/" + userName;
         userNameTextView.setText(title);
 
-        CollapsingToolbarLayout collapsingToolbarLayout = findViewById(R.id.collapsing_toolbar_layout_view_user_detail_activity);
-        collapsingToolbarLayout.setTitleEnabled(false);
-
         Toolbar toolbar = findViewById(R.id.toolbar);
         toolbar.setTitle(title);
         setSupportActionBar(toolbar);

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

@@ -1,6 +1,5 @@
 <?xml version="1.0" encoding="utf-8"?>
 <androidx.drawerlayout.widget.DrawerLayout 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"
     android:id="@+id/drawer_layout"
     android:layout_width="match_parent"
@@ -37,39 +36,39 @@
                     android:id="@+id/profile_linear_layout_main_activity"
                     android:layout_width="match_parent"
                     android:layout_height="wrap_content"
-                        android:padding="16dp"
+                    android:background="?attr/selectableItemBackground"
                     android:clickable="true"
                     android:focusable="true"
-                        android:background="?attr/selectableItemBackground">
+                    android:padding="16dp">
 
                     <ImageView
                         android:layout_width="24dp"
                         android:layout_height="24dp"
-                            android:layout_marginEnd="32dp"
                         android:layout_gravity="center_vertical"
-                            android:src="@drawable/ic_outline_account_circle_24px"/>
+                        android:layout_marginEnd="32dp"
+                        android:src="@drawable/ic_outline_account_circle_24px" />
 
                     <TextView
                         android:layout_width="wrap_content"
                         android:layout_height="wrap_content"
+                        android:layout_gravity="center_vertical"
                         android:text="@string/profile"
-                            android:textColor="@android:color/black"
+                        android:textColor="@android:color/black" />
-                            android:layout_gravity="center_vertical"/>
 
                 </LinearLayout>
 
                 <View
                     android:layout_width="match_parent"
                     android:layout_height="1dp"
-                        android:background="#E0E0E0"/>
+                    android:background="#E0E0E0" />
 
                 <TextView
                     android:id="@+id/following_label_main_activity"
                     android:layout_width="wrap_content"
                     android:layout_height="wrap_content"
-                        android:text="@string/following"
                     android:layout_margin="16dp"
-                        android:visibility="gone"/>
+                    android:text="@string/following"
+                    android:visibility="gone" />
 
                 <androidx.recyclerview.widget.RecyclerView
                     android:id="@+id/subscribed_user_recycler_view_main_activity"
@@ -80,9 +79,9 @@
                     android:id="@+id/subscriptions_label_main_activity"
                     android:layout_width="wrap_content"
                     android:layout_height="wrap_content"
-                        android:text="@string/subscriptions"
                     android:layout_margin="16dp"
-                        android:visibility="gone"/>
+                    android:text="@string/subscriptions"
+                    android:visibility="gone" />
 
                 <androidx.recyclerview.widget.RecyclerView
                     android:id="@+id/subscribed_subreddit_recycler_view_main_activity"

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

@@ -8,15 +8,14 @@
     tools:context=".ViewSubredditDetailActivity">
 
     <com.google.android.material.appbar.AppBarLayout
-        android:id="@+id/app_bar_layout_view_subreddit_detail_activity"
         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_subreddit_detail_activity"
             android:layout_width="match_parent"
             android:layout_height="match_parent"
+            app:titleEnabled="false"
             app:contentScrim="?attr/colorPrimary"
             app:layout_scrollFlags="scroll|enterAlways|enterAlwaysCollapsed"
             app:toolbarId="@+id/toolbar">

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

@@ -8,15 +8,14 @@
     tools:context=".ViewUserDetailActivity">
 
     <com.google.android.material.appbar.AppBarLayout
-        android:id="@+id/app_bar_layout_view_user_detail_activity"
         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"
             app:contentScrim="?attr/colorPrimary"
             app:layout_scrollFlags="scroll|enterAlways|enterAlwaysCollapsed"
             app:toolbarId="@+id/toolbar">

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

@@ -11,6 +11,13 @@
         android:layout_height="wrap_content"
         android:theme="@style/AppTheme.AppBarOverlay">
 
+        <com.google.android.material.appbar.CollapsingToolbarLayout
+            android:layout_width="match_parent"
+            android:layout_height="match_parent"
+            app:titleEnabled="false"
+            app:layout_scrollFlags="scroll|enterAlways"
+            app:toolbarId="@+id/toolbar">
+
             <FrameLayout
                 android:id="@+id/toolbar_frame_layout_main_activity"
                 android:layout_width="match_parent"
@@ -19,9 +26,7 @@
                 <androidx.appcompat.widget.Toolbar
                     android:id="@+id/toolbar"
                     android:layout_width="match_parent"
-                android:layout_height="?attr/actionBarSize"
+                    android:layout_height="?attr/actionBarSize"/>
-                android:background="?attr/colorPrimary"
-                app:popupTheme="@style/AppTheme.PopupOverlay" />
 
                 <com.ferfalk.simplesearchview.SimpleSearchView
                     android:id="@+id/search_view_main_activity"
@@ -39,6 +44,8 @@
 
             </FrameLayout>
 
+        </com.google.android.material.appbar.CollapsingToolbarLayout>
+
     </com.google.android.material.appbar.AppBarLayout>
 
     <View

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

@@ -43,12 +43,4 @@
 
     </LinearLayout>
 
-    <!--<android.support.design.widget.FloatingActionButton
-        android:id="@+id/fab_post_fragment"
-        android:layout_width="wrap_content"
-        android:layout_height="wrap_content"
-        android:layout_gravity="bottom|end"
-        android:layout_margin="@dimen/fab_margin"
-        app:srcCompat="@drawable/baseline_add_white_24" />-->
-
 </androidx.coordinatorlayout.widget.CoordinatorLayout>