Android用來判斷某個服務是否已經Working

/**
     * 用来判断服务是否运行.
     * @param context
     * @param className 判断的服务名字：包名+类名
     * @return true 在运行, false 不在运行
     */
      
    public boolean isServiceRunning(Context context,String className) {        
      
        boolean isRunning = false;
      
        ActivityManager activityManager = 
      
            (ActivityManager)context.getSystemService(ACTIVITY_SERVICE); 
      
        List<ActivityManager.RunningServiceInfo> serviceList 
      
        = activityManager.getRunningServices(Integer.MAX_VALUE);
      
        if (!(serviceList.size()>0)) {
      
            return false;
      
        }
      
        for (int i=0; i<serviceList.size(); i++) {
      
            if (serviceList.get(i).service.getClassName().equals(className) == true) {
      
                isRunning = true;
      
                break;
      
            }
      
        }
      
        Log.i(TAG,"service is running?=="+isRunning);
      
        return isRunning;
      
    }