Custom animation on Activity Transition

This is an easy way to apply custom animation on Activity Transition. Here I created three xml files for animation and put them into res/anim folder. And then just apply the animation to any Activity.

res/anim/zoom_enter.xml
<?xml version="1.0" encoding="utf-8"?>
<set xmlns:android="http://schemas.android.com/apk/res/android"
    android:shareInterpolator="false">
    <alpha
        android:fromAlpha="0"
        android:toAlpha="1.0" 
        android:duration="700"/>
    
</set>

res/anim/zoom_in.xml
<?xml version="1.0" encoding="utf-8"?>
<set xmlns:android="http://schemas.android.com/apk/res/android"
    android:shareInterpolator="false">
    <scale
        android:interpolator="@android:anim/accelerate_decelerate_interpolator"
        android:fromXScale="1.0"
        android:toXScale="5.0"
        android:fromYScale="1.0"
        android:toYScale="5.0"
        android:pivotX="50%"
        android:pivotY="50%"
        android:fillAfter="false"
        android:duration="300" />
    
</set>

res/anim/zoom_out.xml
<?xml version="1.0" encoding="utf-8"?>
<set xmlns:android="http://schemas.android.com/apk/res/android"
    android:shareInterpolator="false">
    <scale
        android:interpolator="@android:anim/accelerate_decelerate_interpolator"
        android:fromXScale="1.0"
        android:toXScale="0.0"
        android:fromYScale="1.0"
        android:toYScale="0.0"
        android:pivotX="50%"
        android:pivotY="50%"
        android:fillAfter="false"
        android:duration="500" />
    
</set>

Activity Class:

@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    ...
    overridePendingTransition(R.anim.zoom_enter, R.anim.zoom_in);
    ...
}

@Override
public void onBackPressed () {
    super.onBackPressed ();
    this.overridePendingTransition(R.anim.zoom_enter, R.anim.zoom_out);
}