Question

我有《图像评论》,其中显示了一种情况。我试图用透镜,但并没有改变情况。然后,我尝试了手铐,但却没有处理睡觉的方法,因此我不得不增加时间、时间。我如何能够做到这一点? 请举一个例子吗?

我的原始法典如下:

@Override
        public void onClick(View v) {
            // TODO Auto-generated method stub
                Thread timer = new Thread() {
                    public void run() {
                        int time = 0;
                        while (time <= 7000) {
                            try {
                                sleep(100);
                                time =+ 100;
                                if(time == 2000) {
                                    radar.setImageResource(R.drawable.radar_full);
                                }
                                if(time == 5000) {
                                    radar.setImageResource(R.drawable.radar_50);
                                }
                                if(time == 7000) {
                                    radar.setImageResource(R.drawable.radar_found);
                                }
                            } catch (InterruptedException e) {
                                // TODO Auto-generated catch block
                                e.printStackTrace();


        }
};
                    timer.start();
                    };
                };

Answer 1

这里是你们的两门辅导:

rel=“nofollow”A Stitch in Time

It appears that you need to learn more about Threads and Handlers in general. However, it s worth pointing out that you cannot update a UI element from within a Thread, which is what I m guessing you tried to do; UI updating (such as changing the content of an ImageView) must be done within the UI thread. Therefore, updating the image inside a Handler on the UI thread was going in the right direction. You just need a way to call that Handler at timed intervals, and the tutorial above demonstrates one such way, by simply posting messages to the Handler.

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