@Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_layout_changes);

        mContainerView = (ViewGroup) findViewById(R.id.container);
    }
The container view which has layout change animations turned on. In this sample, this view
is a {@link android.widget.LinearLayout}.
app/src/main/java/home/smart/fly/animations/ui/activity/demos/LayoutChangesActivity.java