在TimerTask的开始的AsyncTask [英] Start AsyncTask in TimerTask

问题描述

我有，我要进行的AsyncTask当倒计时完成一个计时器。如果我把它执行的处理程序会循环，并启动了很多次。如果我不把它放在一个处理程序我得到以下崩溃： 不能创建处理程序内螺纹已经不叫尺蠖。prepare（）

I have a timer that I want to start an AsyncTask when the countdown is done. If I put the execution of it in a handler it loops it and starts it many times. And if I dont put it in a Handler I get the following crash: can't create handler inside thread that has not called looper.prepare()

timer.schedule(new ListUpdate(), helper.nextListUpdate.get(0));

class ListUpdate extends TimerTask {
    private Handler mHandler = new Handler(Looper.getMainLooper());
    public void run() {
        mHandler.post(new Runnable() {
            public void run() {
                AsyncTask<Integer, Void, Boolean> task = new updateList();
                task.execute();
            }
        });
    }
}

如何，我可以解决这个问题有什么建议？

Any suggestions of how I can solve this?

推荐答案

通过添加一个TimerTask之外的处理器这是我从一个TimerTask打电话，我可以使它的工作！

By adding a handler outside of the TimerTask which I call from the TimerTask I could make it work!

final Handler handler = new Handler() {
    public void handleMessage(Message msg) {
        RelativeLayout rl_header = (RelativeLayout)findViewById(R.id.rl_header);
        Desktop desktop = helper.getDesktop();
        try {
            desktop.inflate(ll, rl_header, banners, DesktopApp.this);
            Collections.sort(helper.nextListUpdate);
            helper.nextListUpdate.remove(0);
            timer = new Timer();
            if (helper.nextListUpdate.size() > 0) timer.schedule(new ListUpdate(), helper.nextListUpdate.get(0));
        } catch (Exception e) {
            e.printStackTrace();
        }
     }

};

class ListUpdate extends TimerTask {
    public void run() {
        DesktopApp.this.runOnUiThread(new Runnable() {
            @Override
            public void run() {
                handler.sendEmptyMessage(0);
            }
        });
    }
}

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