Question

我在Loaded ListView时需要一个计时器。就像“等待[（计时器）42]购买元素的秒数”我想向用户展示Textview喜欢它。我不能在ListView中使用Thread ...

我从runOnUiThread获取错误。为什么？我不能在Listview中使用计时器。

 @Override
    public View getView(final int position, View convertView, ViewGroup parent) {

        final TextView LblTime;

        inflater=(LayoutInflater)Context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
        View view=inflater.inflate(R.layout.test,parent,false);

        LblTime=(TextView)view.findViewById(R.id.LblFragmentAnaListViewKalanSure );

       Timer T=new Timer();
        T.scheduleAtFixedRate(new TimerTask() {
            @Override
            public void run() {
                Context.getApplicationContext().runOnUiThread(new Runnable() {
                    @Override
                    public void run() {
                        long Time= MyTime.get(position).getTime() - (new Date()).getTime();
                        long Sec= Time/ 1000 % 60;
                        long Min= Time/ (60 * 1000) % 60;
   LblTime.setText(Min+":"+Sec);
                    }
                });
            }
        }, 1000, 1000);
        return view;
    }

Answer 1

尝试使用CountDownTimer它在UI线程中完美运行。您所需要的只是在代码中启动它：

timer = new CountDownTimer(MS_TILL_COMPLETE, TICK_OFFSET) {
        @Override
        public void onTick(long l) {
            //Repeating every TICK_OFFSET
        }

        @Override
        public void onFinish() {
            //Called after MS_TILL_COMPLETE
        }
    }.start();

Answer 2

而不是计时器尝试使用CountDownTimer

new CountDownTimer(10000, 20000) {
        @Override
        public void onTick(long millisUntilFinished) {}

        public void onFinish() {
        }
    }.start();

Answer 3

试试这个..呼叫时间为42秒..

(new Handler()).postDelayed(new Runnable() {

    public void run() {
        // do you want
     }
 }, 42000);

如果你需要的每一秒都比这样做..

这是使用处理程序

初始化..

Handler handler = new Handler();

导入

import android.os.Handler;

将其称为..

 handler.postDelayed(yourtask,42*1000);



 private Runnable yourtask = new Runnable() {
    public void run() {

      // Run your code..
        handler.removeCallbacks(yourtask);
        handler.postDelayed(yourtask, 42*1000); // again start...

    }
};

这是每秒使用一次计时器......

final Handler handler = new Handler();
Timer timer = new Timer();
private int DELAY = 1000 * 60 * 1;

称之为

   timer.scheduleAtFixedRate(doAsynchronousTask, 0, DELAY);

在班级

  TimerTask doAsynchronousTask = new TimerTask() {
        @Override
        public void run() {
            handler.post(new Runnable() {
                public void run() {
             // your code


                }

            });


        }
    };

Android计时器任务问题

3 个答案: