Null object 参考广播接收器

Question

我有一个像这样监听广播接收器的活动：

protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_landing);

        broadcastReceiver = new BroadcastReceiver() {
            @Override
            public void onReceive(Context context, Intent intent) {
                String action = intent.getAction();
                if (action.equals("xxx.xxx")) {
                    boolean updateSuccessful = intent.getExtras().getBoolean("updateSuccess", false);
                    Log.i("HERE", String.valueOf(updateSuccessful));
                }
            }
        };
    }

在我的服务中，我正在尝试广播一条消息，该消息将被我的活动接收。 我这样做：

私人意图意图=新意图（）；

public void checkInternetConnection() {
    Runnable runnable = new Runnable() {
        @Override
        public void run() {
            try{
                Thread.sleep(3000);
                InetAddress ipAddr = InetAddress.getByName("www.google.com");
                if (ipAddr.equals("")) {
                    connected = false;
                    isConnectedToInternet.postValue(false);
                } else {
                    connected = true;
                    isConnectedToInternet.postValue(true);
                    sendUnsentTagNumbers();
                }
               
                sendThisBroadcast();
                checkInternetConnection();
            }
            catch (UnknownHostException e) {
                connected = false;
                isConnectedToInternet.postValue(false);
                checkInternetConnection();
            }
            catch (Exception e) {
                e.printStackTrace();
                checkInternetConnection();
            }
        }
    };
    Thread thread = new Thread(runnable);
    thread.start();
}

private void senThisBroadcast() {
        intent.putExtra("updateSuccess", true);
        intent.setAction("autoswweep.att");
        intent.setFlags(Intent.FLAG_INCLUDE_STOPPED_PACKAGES);
        sendBroadcast(intent);
    }

当我到达sendBroadcast(intent)时，怎么会出现以下错误：

java.lang.NullPointerException: Attempt to invoke virtual method 'void android.content.Context.sendBroadcast(android.content.Intent)' on a null object reference
W/System.err:     at android.content.ContextWrapper.sendBroadcast(ContextWrapper.java:444)
        at sunmi.scan.services.CommonBoundService$6.run(CommonBoundService.java:199)