FAB animation update

app/src/main/java/eu/kanade/tachiyomi/ui/base/fab/ScrollAwareFABBehavior.java

@@ -19,10 +19,19 @@ import android.content.Context;
 import android.support.design.widget.CoordinatorLayout;
 import android.support.design.widget.FloatingActionButton;
 import android.support.v4.view.ViewCompat;
+import android.support.v4.view.animation.FastOutSlowInInterpolator;
 import android.util.AttributeSet;
 import android.view.View;
+import android.view.animation.Animation;
+import android.view.animation.AnimationUtils;
+import android.view.animation.Interpolator;
+
+import eu.kanade.tachiyomi.R;
 
 public class ScrollAwareFABBehavior extends FloatingActionButton.Behavior {
+    private static final Interpolator INTERPOLATOR = new FastOutSlowInInterpolator();
+    private boolean mIsAnimatingOut = false;
+
     public ScrollAwareFABBehavior(Context context, AttributeSet attrs) {
         super();
     }
@@ -40,12 +49,43 @@ public class ScrollAwareFABBehavior extends FloatingActionButton.Behavior {
                                final View target, final int dxConsumed, final int dyConsumed,
                                final int dxUnconsumed, final int dyUnconsumed) {
         super.onNestedScroll(coordinatorLayout, child, target, dxConsumed, dyConsumed, dxUnconsumed, dyUnconsumed);
-        if (dyConsumed > 0 && child.getVisibility() == View.VISIBLE) {
+        if (dyConsumed > 0 && !this.mIsAnimatingOut && child.getVisibility() == View.VISIBLE) {
             // User scrolled down and the FAB is currently visible -> hide the FAB
-            child.hide();
+            animateOut(child);
         } else if (dyConsumed < 0 && child.getVisibility() != View.VISIBLE) {
             // User scrolled up and the FAB is currently not visible -> show the FAB
-            child.show();
+            animateIn(child);
         }
     }
+
+    // Same animation that FloatingActionButton.Behavior uses to hide the FAB when the AppBarLayout exits
+    private void animateOut(final FloatingActionButton button) {
+            Animation anim = AnimationUtils.loadAnimation(button.getContext(), R.anim.fab_hide_to_bottom);
+            anim.setInterpolator(INTERPOLATOR);
+            anim.setDuration(200L);
+            anim.setAnimationListener(new Animation.AnimationListener() {
+                public void onAnimationStart(Animation animation) {
+                    ScrollAwareFABBehavior.this.mIsAnimatingOut = true;
+                }
+
+                public void onAnimationEnd(Animation animation) {
+                    ScrollAwareFABBehavior.this.mIsAnimatingOut = false;
+                    button.setVisibility(View.GONE);
+                }
+
+                @Override
+                public void onAnimationRepeat(final Animation animation) {
+                }
+            });
+            button.startAnimation(anim);
+    }
+
+    // Same animation that FloatingActionButton.Behavior uses to show the FAB when the AppBarLayout enters
+    private void animateIn(FloatingActionButton button) {
+        button.setVisibility(View.VISIBLE);
+            Animation anim = AnimationUtils.loadAnimation(button.getContext(), R.anim.fab_show_from_bottom);
+            anim.setDuration(200L);
+            anim.setInterpolator(INTERPOLATOR);
+            button.startAnimation(anim);
+    }
 }

app/src/main/java/eu/kanade/tachiyomi/ui/manga/info/MangaInfoFragment.java

@@ -65,15 +65,6 @@ public class MangaInfoFragment extends BaseRxFragment<MangaInfoPresenter> {
         View view = inflater.inflate(R.layout.fragment_manga_info, container, false);
         ButterKnife.bind(this, view);
 
-        //Create edit drawable with size 24dp (google guidelines)
-        IconicsDrawable edit = new IconicsDrawable(this.getContext())
-                .icon(GoogleMaterial.Icon.gmd_edit)
-                .color(ContextCompat.getColor(this.getContext(), R.color.white))
-                .sizeDp(24);
-
-        // Update image of fab button
-        fabEdit.setImageDrawable(edit);
-
         // Set listener.
         fabEdit.setOnClickListener(v -> selectImage());
 

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

@@ -0,0 +1,6 @@
+<?xml version="1.0" encoding="utf-8"?>
+<translate xmlns:android="http://schemas.android.com/apk/res/android"
+           android:interpolator="@android:interpolator/accelerate_quint"
+           android:fromYDelta="0"
+           android:toYDelta="30%p"
+           android:duration="200" />

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

@@ -0,0 +1,6 @@
+<?xml version="1.0" encoding="utf-8"?>
+<translate xmlns:android="http://schemas.android.com/apk/res/android"
+           android:interpolator="@android:interpolator/accelerate_cubic"
+           android:fromYDelta="30%p"
+           android:toYDelta="0"
+           android:duration="300" />

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

@@ -18,11 +18,12 @@
 
     <android.support.design.widget.FloatingActionButton
         android:id="@+id/fab"
-        android:layout_height="wrap_content"
-        android:layout_width="wrap_content"
-        android:layout_gravity="bottom|right"
+        android:layout_height="@dimen/fab_size"
+        android:layout_width="@dimen/fab_size"
+        android:layout_gravity="bottom|end"
         android:layout_margin="@dimen/fab_margin"
-        android:src="@drawable/ic_action_add_18dp"
+        android:scaleType="fitCenter"
+        android:src="@drawable/ic_add_white_24dp"
         app:backgroundTint="@color/colorPrimary"
         app:layout_anchor="@id/categories_list"
         app:layout_anchorGravity="bottom|right|end"

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

@@ -1,5 +1,6 @@
 <?xml version="1.0" encoding="utf-8"?>
-<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
+<android.support.design.widget.CoordinatorLayout
+    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:layout_width="match_parent"
@@ -20,7 +21,8 @@
         android:layout_height="match_parent"
         android:orientation="vertical">
 
-        <ScrollView
+        <android.support.v4.widget.NestedScrollView
+            android:id="@+id/manga_info_scroll_view"
             android:layout_width="match_parent"
             android:layout_height="match_parent">
 
@@ -254,28 +256,25 @@
                 </LinearLayout>
 
 
+
+
             </LinearLayout>
 
-        </ScrollView>
+
+        </android.support.v4.widget.NestedScrollView>
 
     </android.support.v4.widget.SwipeRefreshLayout>
 
-    <LinearLayout
-        android:layout_width="wrap_content"
-        android:layout_height="wrap_content"
-        android:layout_alignParentBottom="true"
-        android:layout_alignParentRight="true"
-        android:layout_margin="10dp"
-        android:gravity="bottom">
-
     <android.support.design.widget.FloatingActionButton
         android:id="@+id/fab_edit"
-            android:layout_width="wrap_content"
-            android:layout_height="wrap_content"
-            android:layout_gravity="bottom|right"
+        android:layout_height="@dimen/fab_size"
+        android:layout_width="@dimen/fab_size"
+        android:layout_gravity="bottom|end"
         android:layout_margin="@dimen/fab_margin"
+        android:scaleType="fitCenter"
+        android:src="@drawable/ic_mode_edit_white_24dp"
         app:backgroundTint="@color/colorPrimary"
+        app:layout_anchor="@id/manga_info_scroll_view"
+        app:layout_anchorGravity="bottom|right|end"
         app:layout_behavior="eu.kanade.tachiyomi.ui.base.fab.ScrollAwareFABBehavior"/>
-
-    </LinearLayout>
-</RelativeLayout>
+</android.support.design.widget.CoordinatorLayout>

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

@@ -7,6 +7,7 @@
     <dimen name="margin_left">16dp</dimen>
     <dimen name="margin_right">16dp</dimen>
     <dimen name="fab_margin">16dp</dimen>
+    <dimen name="fab_size">56dp</dimen>
 
     <dimen name="dialog_content_padding">24dp</dimen>
     <dimen name="dialog_margin_top_content">20dp</dimen>