重复执行某段代码
用handler就可以了private Handler handler = new Handler();private Runnable runnable = new Runnable() {public void run() {update();handler.postDelayed(this, 5000);}};
开始计时
handler.removeCallbacks(runnable);handler.postDelayed(runnable, 5000);
停止计时
handler.removeCallbacks(runnable);
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