private void validateServiceIntent(Intent service) {  
        if (service.getComponent() == null && service.getPackage() == null) {  
            //当targetSdkVersion版本大于等于LOLLIPOP就会抛出异常
            if (getApplicationInfo().targetSdkVersion >= Build.VERSION_CODES.LOLLIPOP) {  
                IllegalArgumentException ex = new IllegalArgumentException(  
                        "Service Intent must be explicit: " + service);  
                throw ex;  
            } else {  
                Log.w(TAG, "Implicit intents with startService are not safe: " + service  
                        + " " + Debug.getCallers(2, 3));  
            }  
        }  
    }