how to show circle animation on click in android

Question

i am new to android and reading Material Design i am looking for how to design an animation like this animation

Answer 1

This animation is provided on Android API version 21. From the documentation:

The ViewAnimationUtils.createCircularReveal() method enables you to animate a clipping circle to reveal or hide a view.

// 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
float finalRadius = (float) Math.hypot(cx, cy);

// 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();