Show animations on reader menu. Don't retain fragment instances in ViewPagerReader.

app/src/main/java/eu/kanade/mangafeed/ui/reader/ReaderActivity.java

@@ -68,8 +68,6 @@ public class ReaderActivity extends BaseRxActivity<ReaderPresenter> {
         readerMenu = new ReaderMenu(this, prefs);
         createUiHideFlags();
         enableHardwareAcceleration();
-
-        viewer = getViewer();
     }
 
     @Override
@@ -94,6 +92,7 @@ public class ReaderActivity extends BaseRxActivity<ReaderPresenter> {
     }
 
     public void onChapterReady(List<Page> pages, Manga manga, Chapter chapter) {
+        viewer = getViewer(manga);
         viewer.onPageListReady(pages);
         viewer.updatePageNumber();
         readerMenu.onChapterReady(pages.size(), manga, chapter);
@@ -132,8 +131,10 @@ public class ReaderActivity extends BaseRxActivity<ReaderPresenter> {
         readerMenu.toggle();
     }
 
-    private BaseReader getViewer() {
-        switch (prefs.getDefaultViewer()) {
+    private BaseReader getViewer(Manga manga) {
+        int mangaViewer = manga.viewer == 0 ? prefs.getDefaultViewer() : manga.viewer;
+
+        switch (mangaViewer) {
             case LEFT_TO_RIGHT: default:
                 return new LeftToRightReader(this, container);
             case RIGHT_TO_LEFT:

app/src/main/java/eu/kanade/mangafeed/ui/reader/ReaderMenu.java

@@ -1,6 +1,10 @@
 package eu.kanade.mangafeed.ui.reader;
 
+import android.support.v7.widget.Toolbar;
 import android.view.View;
+import android.view.animation.Animation;
+import android.view.animation.AnimationUtils;
+import android.widget.LinearLayout;
 import android.widget.RelativeLayout;
 import android.widget.SeekBar;
 import android.widget.TextView;
@@ -17,11 +21,12 @@ import eu.kanade.mangafeed.data.preference.PreferencesHelper;
 public class ReaderMenu {
 
     @Bind(R.id.reader_menu) RelativeLayout menu;
+    @Bind(R.id.reader_menu_bottom) LinearLayout bottomMenu;
+    @Bind(R.id.toolbar) Toolbar toolbar;
     @Bind(R.id.current_page) TextView currentPage;
     @Bind(R.id.page_seeker) SeekBar seekBar;
     @Bind(R.id.total_pages) TextView totalPages;
 
-
     private ReaderActivity activity;
     private PreferencesHelper preferences;
     private boolean showing;
@@ -37,12 +42,33 @@ public class ReaderMenu {
     }
 
     public void toggle() {
-        toggle(!showing);
+        if (showing)
+            hide();
+        else
+            show();
     }
 
-    private void toggle(boolean show) {
-        menu.setVisibility(show ? View.VISIBLE : View.GONE);
-        showing = show;
+    private void show() {
+        menu.setVisibility(View.VISIBLE);
+
+        Animation toolbarAnimation = AnimationUtils.loadAnimation(activity, R.anim.enter_from_top);
+        toolbar.startAnimation(toolbarAnimation);
+
+        Animation bottomMenuAnimation = AnimationUtils.loadAnimation(activity, R.anim.enter_from_bottom);
+        bottomMenu.startAnimation(bottomMenuAnimation);
+
+        showing = true;
+    }
+
+    private void hide() {
+        Animation toolbarAnimation = AnimationUtils.loadAnimation(activity, R.anim.exit_to_top);
+        toolbarAnimation.setAnimationListener(new HideMenuAnimationListener());
+        toolbar.startAnimation(toolbarAnimation);
+
+        Animation bottomMenuAnimation = AnimationUtils.loadAnimation(activity, R.anim.exit_to_bottom);
+        bottomMenu.startAnimation(bottomMenuAnimation);
+
+        showing = false;
     }
 
     public void onChapterReady(int numPages, Manga manga, Chapter chapter) {
@@ -77,4 +103,22 @@ public class ReaderMenu {
         @Override
         public void onStopTrackingTouch(SeekBar seekBar) {}
     }
+
+    class HideMenuAnimationListener implements Animation.AnimationListener {
+
+        @Override
+        public void onAnimationStart(Animation animation) {
+
+        }
+
+        @Override
+        public void onAnimationEnd(Animation animation) {
+            menu.setVisibility(View.GONE);
+        }
+
+        @Override
+        public void onAnimationRepeat(Animation animation) {
+
+        }
+    }
 }

app/src/main/java/eu/kanade/mangafeed/ui/reader/viewer/common/ViewPagerReaderFragment.java

@@ -50,12 +50,6 @@ public class ViewPagerReaderFragment extends BaseFragment {
         return fragment;
     }
 
-    @Override
-    public void onCreate(Bundle savedInstanceState) {
-        super.onCreate(savedInstanceState);
-        setRetainInstance(true);
-    }
-
     @Override
     public View onCreateView(LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {
         View view = inflater.inflate(R.layout.fragment_page, container, false);
@@ -70,6 +64,12 @@ public class ViewPagerReaderFragment extends BaseFragment {
         return view;
     }
 
+    @Override
+    public void onDestroyView() {
+        ButterKnife.unbind(this);
+        super.onDestroyView();
+    }
+
     public void onStart() {
         super.onStart();
         observeStatus();

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

@@ -0,0 +1,8 @@
+<?xml version="1.0" encoding="utf-8"?>
+<set xmlns:android="http://schemas.android.com/apk/res/android"
+    android:shareInterpolator="false">
+    <translate
+        android:duration="200"
+        android:fromYDelta="100%"
+        android:toYDelta="0%" />
+</set>

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

@@ -0,0 +1,8 @@
+<?xml version="1.0" encoding="utf-8"?>
+<set xmlns:android="http://schemas.android.com/apk/res/android"
+    android:shareInterpolator="false">
+    <translate
+        android:duration="200"
+        android:fromYDelta="-100%"
+        android:toYDelta="0%" />
+</set>

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

@@ -0,0 +1,8 @@
+<?xml version="1.0" encoding="utf-8"?>
+<set xmlns:android="http://schemas.android.com/apk/res/android"
+    android:shareInterpolator="false">
+    <translate
+        android:duration="200"
+        android:fromYDelta="0%"
+        android:toYDelta="100%" />
+</set>

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

@@ -0,0 +1,8 @@
+<?xml version="1.0" encoding="utf-8"?>
+<set xmlns:android="http://schemas.android.com/apk/res/android"
+    android:shareInterpolator="false">
+    <translate
+        android:duration="200"
+        android:fromYDelta="0%"
+        android:toYDelta="-100%" />
+</set>

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

@@ -10,6 +10,7 @@
     <LinearLayout
         android:layout_width="match_parent"
         android:layout_height="wrap_content"
+        android:id="@+id/reader_menu_bottom"
         android:background="@color/reader_menu_background"
         android:layout_alignParentBottom="true">