private void initializeGameThtread() {
   if (!isThreadAlive()) {
     grenadePickerThread =
         new GrenadePickerThread(grenadePickerPanel.getHolder(), grenadePickerPanel);
     grenadePickerThread.setRunning(true);
     grenadePickerThread.start();
   }
 }
  @Override
  public boolean handleMessage(Message msg) {
    try {
      switch (msg.what) {
        case GameData.ON_RESUME:
          if (gameStatus == GameData.ON_PAUSE) {
            grenadePickerPanel.getLaunchConfirmation(gameStatus);
          }
          return true;

        case GameData.ON_PAUSE:
          if (gameStatus == GameData.GAME_OVER) {
            return true;
          }
          if (gameStatus == GameData.ON_RESUME || gameStatus == GameData.ON_RUNNING) {
            grenadePickerThread.setRunning(false);
            grenadePickerThread.interrupt();
            grenadePickerPanel.setInterruptGrenade(true);
            gameStatus = GameData.ON_PAUSE;
          }
          return true;

        case GameData.ON_LAUNCH:
          if (gameStatus == GameData.ON_STOP
              || gameStatus == GameData.ON_LAUNCH
              || gameStatus == GameData.GAME_OVER) {
            boolean isOK = grenadePickerPanel.getLaunchConfirmation(gameStatus);
          }
          return true;

        case GameData.ON_START:
          grenadePickerPanel.setInterruptGrenade(false);
          initializeGameThtread();
          grenadePickerPanel.startRunning();
          gameStatus = GameData.ON_RUNNING;
          return true;

        case GameData.ON_DESTROY:
          destroyGameThtread();
          return true;

        case GameData.GAME_OVER:
          destroyGameThtread();
          gameStatus = GameData.GAME_OVER;
          grenadePickerPanel.setGameOver();
          return true;

        default:
          return false;
      }
    } catch (Exception ex) {
      Log.i(TAG, "handleMessage", ex);
    }
    return false;
  }