code: @Override
    public void onRegisterStatus(Context context, com.meizu.cloud.pushsdk.platform.message.RegisterStatus registerStatus) {
      //调用新版订阅PushManager.register(context,appId,appKey)回调
      if (null == context || null == registerStatus) {
        return;
      }
      LOGGER.d("register successed, pushId=" + registerStatus.getPushId());
      String pushId = registerStatus.getPushId();
      if (!StringUtil.isEmpty(pushId)) {
        updateAVInstallation(pushId);
      }
    }
docs: 处理设备注册事件