android程序中的睡眠功能

Question

让我的程序进入睡眠时遇到一些问题我试图做的是当按下btnStart时firs随机设置图片到12 ImageButtons然后我希望它暂停5秒然后将第一个ImageButton更改为另一张图片

我的代码看起来像这样,现在当按下按钮时它会立即暂停...

       btnStart.setOnClickListener(new View.OnClickListener() {
        @Override

        public void onClick(View v) {
            // TODO Auto-generated method stub

            Collections.shuffle(pic);
            int time=1;
            press=true;

            pic.get(0).setImageDrawable(getResources().getDrawable(R.drawable.memgreen));
            pic.get(1).setImageDrawable(getResources().getDrawable(R.drawable.memgreen));
            pic.get(2).setImageDrawable(getResources().getDrawable(R.drawable.memred));
            pic.get(3).setImageDrawable(getResources().getDrawable(R.drawable.memred));
            pic.get(4).setImageDrawable(getResources().getDrawable(R.drawable.memblue));
            pic.get(5).setImageDrawable(getResources().getDrawable(R.drawable.memblue));
            pic.get(6).setImageDrawable(getResources().getDrawable(R.drawable.memwhite));
            pic.get(7).setImageDrawable(getResources().getDrawable(R.drawable.memwhite));
            pic.get(8).setImageDrawable(getResources().getDrawable(R.drawable.mempurple));
            pic.get(9).setImageDrawable(getResources().getDrawable(R.drawable.mempurple));
            pic.get(10).setImageDrawable(getResources().getDrawable(R.drawable.memyellow));
            pic.get(11).setImageDrawable(getResources().getDrawable(R.drawable.memyellow));

            try {
                Thread.sleep(5000);

                pic.get(0).setImageDrawable(getResources().getDrawable(R.drawable.coin));

            } catch (InterruptedException e) {
                // TODO Auto-generated catch block
                e.printStackTrace();
            }
     }
  });

Answer 1

好吧,如果您希望UI保持响应,则无法阻止UI线程Thread.sleep.

创建一个新线程,然后将其休眠.在睡眠之后,运行用于更改UI线程上的可绘制视图的方法

new Thread(new Runnable() {
    @Override
    public void run() {
        try {
            Thread.sleep(5000);
        } catch (InterruptedException e) {
            e.printStackTrace();
        }
        runOnUiThread(new Runnable() {
            @Override
            public void run() {
                pic.get(0).setImageDrawable(getResources().getDrawable(R.drawable.coin));
            }
        });
    }
}).start();