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我正在使用以下代码来设置逐帧动画:

    public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);

        setContentView(R.layout.splash);



        final ImageView back = (ImageView) findViewById(R.id.splash_image);
        back.setBackgroundResource(R.drawable.splash_animation);

        AnimationDrawable frameAnimation = (AnimationDrawable) back.getBackground();

         // Start the animation (looped playback by default).
         frameAnimation.setExitFadeDuration(2000);
         frameAnimation.start();
}

但是,setExitFadeDuration只有在 API 级别 11 之后才有效。我用来使动画与 API 7 以后兼容的代码是否有替代方法

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