谷歌的位置API位置監聽器

Question

我使用谷歌API的位置我的應用程序並且在它 -

@Override 
public void onLocationChanged(Location location) { 
    if (paused){ 
     Runnable r = new Runnable() { 
      @Override 
      public void run() { 
       handler.post(new Runnable() { 
        public void run() { 
         if (alarm){ 
          double distance; 
          Location locationA = new Location(""); 
          locationA.setLatitude(destlat); 
          locationA.setLongitude(destlng); 
          Location locationB = new Location(""); 
          locationB.setLatitude(updLat); 
          locationB.setLongitude(updLng); 
          distance = locationA.distanceTo(locationB); 
          current_distance.setText("Current distance: " + Math.round(distance) + " m"); 
          if(distance<rad){ 
           alertUser(); 
           alarm = false; 
          } 
         } 
        } 
       }); 
      } 
     }; 
     Thread bgAlarmThread = new Thread(r); 
     bgAlarmThread.start(); 
    }else{ 
     updLat = location.getLatitude(); 
     updLng = location.getLongitude(); 
     locll = new LatLng(updLat,updLng); 

     MarkerOptions locoptions = new MarkerOptions() 
       .title("You are here") 
       .position(locll) 
       .icon(BitmapDescriptorFactory.fromResource(R.drawable.mapmarker)); 

     if (locmarker == null){ 
      gotoLocation(updLat, updLng, 15); 
     } 

     if(locmarker != null){ 
      locmarker2 = locmarker; 
      locmarker2 = map.addMarker(locoptions); 
      locmarker.remove(); 
      locmarker = null; 
     } 
     locmarker = map.addMarker(locoptions); 
     if(locmarker2 != null){ 
      locmarker2.remove(); 
      locmarker2 = null; 
     } 



     if (alarm){ 
      double distance; 
      Location locationA = new Location(""); 
      locationA.setLatitude(destlat); 
      locationA.setLongitude(destlng); 
      Location locationB = new Location(""); 
      locationB.setLatitude(updLat); 
      locationB.setLongitude(updLng); 
      distance = locationA.distanceTo(locationB); 
      current_distance.setText("Current distance: " + Math.round(distance) + " m"); 
      if(distance<rad){ 
       alertUser(); 
       Toast.makeText(this,"Destination is now within your range",Toast.LENGTH_LONG).show(); 
       alarm = false; 
      } 
     } 

     if (frag2.getVisibility() == View.VISIBLE){ 
      double distance; 
      Location locationA = new Location(""); 
      locationA.setLatitude(destlat); 
      locationA.setLongitude(destlng); 
      Location locationB = new Location(""); 
      locationB.setLatitude(updLat); 
      locationB.setLongitude(updLng); 
      distance = locationA.distanceTo(locationB); 


      EditText current_distance = (EditText)findViewById(R.id.currentDistance); 
      current_distance.setText("Current distance: " + Math.round(distance) + " m"); 
     } 




    } 

} 

位置監聽器對於我的應用程序工作，位置監聽器應該工作，即使應用程序最小化，但是當我點擊主頁按鈕時，位置偵聽器將無法工作。如何在應用程序最小化時讓偵聽器工作？是否有可能在另一個線程上運行偵聽器本身？怎麼會這樣？

Answer 1

沒有人似乎知道答案，所以我不妨給它，因爲它已經很長時間了，它仍然沒有答案。

public void startTimer() { 
    //set a new Timer 
    timer = new Timer(); 
    //initialize the TimerTask's job 
    initializeTimerTask(); 
    //schedule the timer, after the first 5000ms the TimerTask will run every 10000ms 
    timer.schedule(timerTask, 2000, 4000); // 
} 
public void initializeTimerTask() { 
    timerTask = new TimerTask() { 
     public void run() { 

      //use a handler to run a toast that shows the current timestamp 
      handler.post(new Runnable() { 
       public void run() { 
        Runnable r = new Runnable() { 
         @Override 
         public void run() { 
          handler.post(new Runnable() { 
           public void run() { 
            if (alarm){ 
             double distance; 
             Location locationA = new Location(""); 
             locationA.setLatitude(destlat); 
             locationA.setLongitude(destlng); 
             Location locationB = new Location(""); 
             locationB.setLatitude(updLat); 
             locationB.setLongitude(updLng); 
             distance = locationA.distanceTo(locationB); 
             current_distance.setText("Current distance: " + Math.round(distance) + " m"); 
             if(distance<rad){ 
              alertUser(); 
              alarm = false; 
             } 
            } 
           } 
          }); 
         } 
        }; 
        Thread bgAlarmThread = new Thread(r); 
        bgAlarmThread.start(); 
       } 
      }); 
     } 
    }; 

}