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timer = new Timer();
timer.schedule(task, 1000, 1000);
TimerTask task = new TimerTask() {
@Override
public void run() {
runOnUiThread(new Runnable() { // UI thread
@Override
public void run() {
time--;
Message msg = new Message();
msg.what = 1;
handler.sendMessage(msg);
}
});
}
};
Handler handler = new Handler(){
public void handleMessage(Message msg) {
Log.i("msg.what", msg.what+"");
if (msg.what == 1) {
Log.i("time", time+"");
if (time < 0) {
Log.i("time", time+"");
timer.cancel();
timer=null;
exitMain();//返回主界面的方法
}
}else if(msg.what == 2){
if (timer != null){
timer.cancel(); //将原任务从队列中移除
timer=null;
}
}
};
};