Android:从服务中调用Fragment方法

Question

运行Firebase Cloud messagin服务，我希望每次收到新消息时，都会调用特定片段中的methode。

public class FirebaseMsgService extends FirebaseMessagingService {
public FirebaseMsgService() {
}

@Override
public void onMessageReceived(RemoteMessage remoteMessage) {
super.onMessageReceived(remoteMessage);
ServiceConnector serviceconnector =null;
JSONObject data;
String json = remoteMessage.getData().toString();
try{
data= new JSONObject(json);
**Fragment.method(data);** 
}
catch(Exception e){

}


}

}

Answer 1

您可以使用LocalBroadcastManager

服务：

private void notifyFragment(String json){
Intent intent = new Intent("nameOfTheAction");
Bundle bundle = new Bundle();
bundle.putString("json", json)); 
intent.putExtras(bundle);
LocalBroadcastManager.getInstance(this).sendBroadcast(intent);
}

片段：

LocalBroadcastManager bm;
@Override
public void onAttach(Context context) {
super.onAttach(context);
bm = LocalBroadcastManager.getInstance(this);
IntentFilter actionReceiver = new IntentFilter();
actionReceiver.addAction("nameOfTheAction");
bm.registerReceiver(onJsonReceived , actionReceiver);
}


private BroadcastReceiver onJsonReceived = new BroadcastReceiver() {
@Override
public void onReceive(Context context, Intent intent) {
if (intent != null) {
String json = intent.getString("json")
data = new JSONObject(json);
}
}
};

@Override
protected void onDetach() {
super.onDetach();
bm.unregisterReceiver(onJsonReceived);
}