AbsSlidingMusicPanelActivity.java 文件源码

private void animateNavigationBarColor(int color) {
    if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {
        if (navigationBarColorAnimator != null) navigationBarColorAnimator.cancel();
        navigationBarColorAnimator = ValueAnimator.ofArgb(getWindow().getNavigationBarColor(), color).setDuration(ViewUtil.RETRO_MUSIC_ANIM_TIME);
        navigationBarColorAnimator.setInterpolator(new PathInterpolator(0.4f, 0f, 1f, 1f));
        navigationBarColorAnimator.addUpdateListener(new ValueAnimator.AnimatorUpdateListener() {
            @TargetApi(Build.VERSION_CODES.LOLLIPOP)
            @Override
            public void onAnimationUpdate(ValueAnimator animation) {
                AbsSlidingMusicPanelActivity.super.setNavigationbarColor((Integer) animation.getAnimatedValue());
            }
        });
        navigationBarColorAnimator.start();
    }
}