Animate Toolbar toggle

android/app/src/main/java/com/reactnativenavigation/views/RnnToolBar.java

@@ -118,7 +118,8 @@ public class RnnToolBar extends Toolbar {
         ActionBar actionBar = ((AppCompatActivity) getContext()).getSupportActionBar();
         if (actionBar != null) {
             actionBar.setShowHideAnimationEnabled(animated);
-            actionBar.show();
+            // We hide the ToolBar's parent (AppBarLayout) since this animates the shadow added by AppBar as well
+            ((View) getParent()).setVisibility(VISIBLE);
         }
     }
 
@@ -126,7 +127,8 @@ public class RnnToolBar extends Toolbar {
         ActionBar actionBar = ((AppCompatActivity) getContext()).getSupportActionBar();
         if (actionBar != null) {
             actionBar.setShowHideAnimationEnabled(animated);
-            actionBar.hide();
+            // We hide the ToolBar's parent (AppBarLayout) since this animates the shadow added by AppBar as well
+            ((View) getParent()).setVisibility(GONE);
         }
     }
 

android/app/src/main/res/layout/bottom_tab_activity.xml

@@ -5,7 +5,8 @@
     android:orientation="vertical"
     android:layout_width="match_parent"
     android:layout_height="match_parent"
-    tools:context=".activities.TabActivity">
+    tools:context=".activities.TabActivity"
+    android:animateLayoutChanges="true">
 
     <android.support.design.widget.AppBarLayout
         android:id="@+id/appbar"