핸들메시지를 보내서 토스트를 띄울려고 하는데요~

실행이 안되네요..

조언 부탁 드립니다~

public int onStartCommand(Intent intent, int flags, int startId)
 {
  super.onStartCommand(intent, flags, startId);
  
  lThread = new Thread(lock);
  lThread.setDaemon(true);
  lThread.start();
  
  bThread = new Thread();
  bThread.setDaemon(true);
  bThread.start();
  
  return START_REDELIVER_INTENT;
 }

class bThread extends Thread{
  Handler mHandler;
  
  bThread(Handler handler){
   mHandler = handler;
  }
  
  public void run(){
   while(true){
    mHandler.sendEmptyMessage(0);
   }
  }
 }

Handler mHandler = new Handler(){
  public void handleMessage(Message msg){
   if(msg.what == 0){
        Toast toast = Toast.makeText(getApplicationContext(), "배터리가 부족합니다.", Toast.LENGTH_SHORT);
     toast.show();
    
   }
  }
 };