“RuntimeException：无法在未调用Looper.prepare（）的线程内创建处理程序”

Question

`//some method
Timer timer=new Timer();
    //Handler handler=new Handler();
    timer.scheduleAtFixedRate(new TimerTask()
    {
        public void run()
        {
            loadLayout();
        }

    }, 1000, 10000000);
 //end of method
 public void loadLayout()
 {
    li = (LayoutInflater) getSystemService(LAYOUT_INFLATER_SERVICE);
    wm = (WindowManager) getSystemService(WINDOW_SERVICE);

    params = new WindowManager.LayoutParams(
            WindowManager.LayoutParams.TYPE_SYSTEM_OVERLAY |        WindowManager.LayoutParams.TYPE_SYSTEM_ALERT,
            WindowManager.LayoutParams.FLAG_WATCH_OUTSIDE_TOUCH | WindowManager.LayoutParams.FLAG_NOT_TOUCH_MODAL,
            PixelFormat.TRANSLUCENT);
    params.gravity = Gravity.RIGHT | Gravity.TOP;
    myview = li.inflate(R.layout.locked_layout, null);
    wm.addView(myview, params);
 }`     

如何在线程中调用WindowMananger.addView（viewGroup，layoutParams）方法？ 请帮帮我!!!!!

Answer 1

我认为你的问题是你在单独的线程中调用WindowMananger.addView（viewGroup，layoutParams），你应该在UI线程中调用它。这段代码在Activity中，对吗？所以只需修改你的TimerTask：

Timer timer=new Timer();
//Handler handler=new Handler();
timer.scheduleAtFixedRate(new TimerTask()
{
    public void run()
    {       
       runOnUiThread(new Runnable() {

          @Override
          public void run() {
             loadLayout();
          }
      });
    }

}, 1000, 10000000);