Add buttons to open next/previous chapter in the reader. Try entire app with hardware acceleration

app/src/main/res/anim/fade_in.xml

@@ -4,5 +4,6 @@
         android:fromAlpha="0.0"
         android:toAlpha="1.0"
         android:interpolator="@android:anim/accelerate_interpolator"
-        android:duration="300" />
+        android:duration="300"
+        android:fillAfter="true"/>
 </set>

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

@@ -0,0 +1,19 @@
+<?xml version="1.0" encoding="utf-8"?>
+<menu xmlns:android="http://schemas.android.com/apk/res/android"
+      xmlns:app="http://schemas.android.com/apk/res-auto">
+
+    <item
+        android:id="@+id/action_previous_chapter"
+        android:title="@string/action_previous_chapter"
+        android:icon="@drawable/ic_skip_previous_white_24dp"
+        android:visible="false"
+        app:showAsAction="always" />
+
+    <item
+        android:id="@+id/action_next_chapter"
+        android:title="@string/action_next_chapter"
+        android:icon="@drawable/ic_skip_next_white_24dp"
+        android:visible="false"
+        app:showAsAction="always" />
+
+</menu>

app/src/main/res/values/strings.xml

@@ -34,6 +34,9 @@
     <string name="action_next_unread">Next unread</string>
     <string name="action_start">Start</string>
     <string name="action_stop">Stop</string>
+    <string name="action_previous_chapter">Previous chapter</string>
+    <string name="action_next_chapter">Next chapter</string>
+
 
     <!-- Buttons -->
     <string name="button_ok">OK</string>