Dialog Box Login with Circular Animation

Login Screen on Dialog Box with Circular Animations.

Demo

The Animation smooth, in the video it seems slow, as to show the animation precisely.

Prerequisites

This works only for API level 21 and above.

Circular Animation Code

private void circularAnimation(View dialogView, final boolean state, final Dialog loginLayout) {

    final View view = dialogView.findViewById(R.id.login_activity);

    int w = view.getWidth();
    int h = view.getHeight();

    final int endRadius = (int) Math.hypot(w, h);

    final int cx = (int) (fab.getX() + (fab.getWidth()/2));
    final int cy = (int) (fab.getY())+ fab.getHeight() + 56;

    // i recommend running animation in view.post(new Runnable()),
    // as couple of times you may get detachable error, this handles that cases
    view.post(new Runnable() {
        @Override
        public void run() {
            if(state){
                Animator animator = ViewAnimationUtils.createCircularReveal(view, cx,cy, 0, endRadius);

                view.setVisibility(View.VISIBLE);
                animator.setDuration(1000);
                animator.start();

            } else {

                Animator animator =
                        ViewAnimationUtils.createCircularReveal(view, cx, cy, endRadius, 0);

                animator.addListener(new AnimatorListenerAdapter() {
                    @Override
                    public void onAnimationEnd(Animator animation) {
                        super.onAnimationEnd(animation);
                        loginLayout.dismiss();
                        view.setVisibility(View.INVISIBLE);

                    }
                });
                animator.setDuration(1000);
                animator.start();
            }
        }
    });

}

Circular Reveal Explanation