android 广播接收不到消息怎么处理？

发送消息是Activity,接收消息是Fragment,回到调用Fragment的activity并没有接收到

Intent intent1=new Intent("android.intent.action.CART_BROADCAST");
 intent1.putExtra("login", s);   
sendBroadcast(intent1);

 BroadcastReceiver receiver;
    LocalBroadcastManager broadcastManager;
         receiver = new BroadcastReceiver() {
            public void onReceive(Context context, Intent intent) {
                String s= intent.getExtras().getString("login");
                login.setText("1234");
            }
        };
        broadcastManager = LocalBroadcastManager.getInstance(getActivity());
        IntentFilter intentFilter = new IntentFilter();
        intentFilter.addAction("android.intent.action.CART_BROADCAST");
        broadcastManager.registerReceiver(receiver, intentFilter);

https://blog.csdn.net/qq_41113081/article/details/86651217