public void showFab() {
mFab.setVisibility(View.VISIBLE);
mFab.setScaleX(0.65f);
mFab.setScaleY(0.65f);
mFab.animate().scaleX(1f).scaleY(1f).setDuration(100).setListener(null);
mFab.setImageDrawable(
new AnimatingDrawable.Builder(getBaseContext())
.frames(
R.drawable.fab_open_1,
R.drawable.fab_open_2,
R.drawable.fab_open_3,
R.drawable.fab_open_4,
R.drawable.fab_open_5)
.build());
((Animatable) mFab.getDrawable()).start();
}