Android drag and return to previous activity like Facebook and Google Photos

Question

I have been finding a way to implement animation like Facebook and Google Photos. When in 2nd Activity, when dragging images the images follow and the 2nd Activity started to fade out and we see 1st Activity. Images of what I was trying to ask is here.

Answer 1

I have found some code from Nick Butcher sample code.

ElasticDragDismissFrameLayout.java

and when using it:

chromeFader = new ElasticDragDismissFrameLayout.SystemChromeFader(getWindow()) {
        @Override
        public void onDragDismissed() {
            finishAfterTransition();
        }
    };