MovieDetailsActivity.java 文件源码

@Override
public void showFavoriteMovie() {
    if (!isFavorite) {
        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {

            AnimatedVectorDrawable emptyHeart = (AnimatedVectorDrawable)
                    emptyHeartConstantState.newDrawable();
            fab.setImageDrawable(emptyHeart);
            emptyHeart.start();

        } else {
            fab.setImageResource(R.drawable.heart_fill);
        }
        isFavorite = true;
    }
}