HolidayPlaybackControlsFragment.java 文件源码

public void showBouceAnimation() {
    playPauseFab.clearAnimation();

    playPauseFab.setScaleX(0.9f);
    playPauseFab.setScaleY(0.9f);
    playPauseFab.setVisibility(View.VISIBLE);
    playPauseFab.setPivotX(playPauseFab.getWidth() / 2);
    playPauseFab.setPivotY(playPauseFab.getHeight() / 2);

    playPauseFab.animate()
            .setDuration(200)
            .setInterpolator(new DecelerateInterpolator())
            .scaleX(1.1f)
            .scaleY(1.1f)
            .withEndAction(() -> playPauseFab.animate()
                    .setDuration(200)
                    .setInterpolator(new AccelerateInterpolator())
                    .scaleX(1f)
                    .scaleY(1f)
                    .alpha(1f)
                    .start())
            .start();
}