new Thread() {
    public void run() {
        for (int i = initial; i < target; i++) {
            final int bright = i;
            handle.post(new Runnable() {
                public void run() {
                    float currentBright = bright / 100f;
                    window.getAttributes().screenBrightness = currentBright;
                    window.setAttributes(window.getAttributes());
                });
            }
            try {
                sleep(step);
            } catch (InterruptedException e) {
                e.printStackTrace();
            }
        }
    }
}.start();

我不知道这是否被认为是很好的方法(我认为使用ASyncTask,但在这种情况下我看不到好处).有没有更好的方法来实现背光衰落？

编辑：我正在使用TimerTask如下：

new Timer().schedule(new TimerTask() {
    @Override
    public void run() {
        final float currentBright = counter[0] / 100f;
        handle.post(new Runnable() {    
            public void run() {
                window.getAttributes().screenBrightness = currentBright;
                window.setAttributes(window.getAttributes());
                if (++counter[0] <= target) {
                    cancel();
                }
            }
        });
    }
},step);

我为计数器使用数组的原因是因为它需要在Runnable中被访问,但是我需要修改该值.这使用较少的cpu,但仍然超过我喜欢.

EDIT2：Aaa和第三次尝试.感谢CommonsWare的建议！ (我希望我正确地应用它！)

handle.post(new Runnable() {
        public void run() {
            if (counter[0] < target) {
                final float currentBright = counter[0] / 100f;
                window.getAttributes().screenBrightness = currentBright;            
                window.setAttributes(window.getAttributes());
                counter[0]++;
                handle.postDelayed(this,step);
            }
        }
   });

谢谢！