Android: Ripple Background Programmatically

Question

I am currently creating an Android app where someone can input their name, press a button, and then it just outputs their name back to them.

One effect that I would

Answer 1

What you are describing is a reveal effect on the background.

From the official doc you can find ready to use examples:

1) Here is how to reveal a previously invisible view using reveal effect:

 // previously invisible view
 View myView = findViewById(R.id.my_view);

 // get the center for the clipping circle
 int cx = myView.getWidth() / 2;
 int cy = myView.getHeight() / 2;

 // get the final radius for the clipping circle
 int finalRadius = Math.max(myView.getWidth(), myView.getHeight());

 // create the animator for this view (the start radius is zero)
 Animator anim =
     ViewAnimationUtils.createCircularReveal(myView, cx, cy, 0, finalRadius);

 // make the view visible and start the animation
 myView.setVisibility(View.VISIBLE);
 anim.start();

2) Here is how to hide a previously visible view using the reveal effect:

 // previously visible view
 final View myView = findViewById(R.id.my_view);

 // get the center for the clipping circle
 int cx = myView.getWidth() / 2;
 int cy = myView.getHeight() / 2;

 // get the initial radius for the clipping circle
 int initialRadius = myView.getWidth();

 // create the animation (the final radius is zero)
 Animator anim =
     ViewAnimationUtils.createCircularReveal(myView, cx, cy, initialRadius, 0);

 // make the view invisible when the animation is done
 anim.addListener(new AnimatorListenerAdapter() {
     @Override
     public void onAnimationEnd(Animator animation) {
         super.onAnimationEnd(animation);
         myView.setVisibility(View.INVISIBLE);
     }
 });

 // start the animation
 anim.start();

In you app, you can use a colored background layer (invisible at the beginning) and then use the reveal effect on it.