Start AsyncTask In TimerTask

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

Solution 1:

AsyncTask is supposed to run on UI thread only. In your case, seems like you are not running it properly on a UI thread.

Perhaps try it like this:

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

class ListUpdate extends TimerTask {
    Looper looper = Looper.getMainLooper();
    looper.prepareMainLooper();

    private Handler mHandler = new Handler(looper);
    public void run() {
        mHandler.post(new Runnable() {
            public void run() {
                AsyncTask<Integer, Void, Boolean> task = new updateList();
                task.execute();
            }
        });
    }
}

Solution 2:

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);
            }
        });
    }
}