关于Service Intent must be explicit

　　今天把Andorid.mk项目迁移为Gradle项目，运行时绑定蓝牙服务报错 Service Intent must be explicit: Intent { act=com.anwsdk.service.AnwPhoneLink }

framework源码：

    private void validateServiceIntent(Intent service) {
        if (service.getComponent() == null && service.getPackage() == null) {
            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));
            }
        }
    }

由于我只设置了action,所以会判断App的targetSdkVersion和Build.VERSION_CODES.LOLLPOP（21）,由于我targetSdkVersion设置高了，所以报了错误。
改成setComponent方式就可以正常绑定服务了