当一个用户收到另一个用户的消息时，他们会收到另一个用户的通知 Firebase Cloud Messaging 系统。当用户单击该通知时，它会将他们带到 MessageActivity 太棒了。
我还有一些其他的例子，其中一个用户接收到了其中的一个 Firebase Cloud Messaging 通知：当有人对你的帖子发表评论，喜欢你的帖子等，当他们收到这些通知时，显然应该把他们带到 PostActivity ，而不是 MessageActivity .
那么，我应该再写一篇吗 "MyFirebaseInstanceServiceActivity" 或者我可以做一些简单的更改，这样如果是评论通知，它就会把你带到 PostActivity 而不是 MessageActivity ?
myfirebaseinstanceservice公司

public class MyFirebaseInstanceService extends FirebaseMessagingService {

    @Override
    public void onMessageReceived(@NonNull RemoteMessage remoteMessage) {
        super.onMessageReceived(remoteMessage);

        String sented = remoteMessage.getData().get("sented");

        FirebaseUser firebaseUser = FirebaseAuth.getInstance().getCurrentUser();

        if (firebaseUser != null && sented.equals(firebaseUser.getUid())) {
            sendNotification(remoteMessage);
        }
    }

    private void sendNotification(RemoteMessage remoteMessage) {
        String user = remoteMessage.getData().get("user");
        String icon = remoteMessage.getData().get("icon");
        String title = remoteMessage.getData().get("title");
        String body = remoteMessage.getData().get("body");

        RemoteMessage.Notification notification = remoteMessage.getNotification();
        int j = Integer.parseInt(user.replaceAll("[\\D]", ""));
        Intent intent = new Intent(MyFirebaseInstanceService.this, MessageActivity.class);
        Bundle bundle = new Bundle();
        bundle.putString("id", user);
        intent.putExtras(bundle);
        intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
        PendingIntent pendingIntent = PendingIntent.getActivity(MyFirebaseInstanceService.this, j, intent, PendingIntent.FLAG_ONE_SHOT);

        Uri sound = RingtoneManager.getDefaultUri(RingtoneManager.TYPE_NOTIFICATION);
        NotificationCompat.Builder builder = new NotificationCompat.Builder(MyFirebaseInstanceService.this, NOTIFICATION_CHANNEL_ID);
        builder.setSmallIcon(R.drawable.ic_notification_events);
        builder.setContentTitle(title);
        builder.setContentText(body);
        builder.setAutoCancel(true);
        builder.setSound(sound);
        builder.setContentIntent(pendingIntent);

        NotificationManager notificationManager = (NotificationManager) getSystemService(Context.NOTIFICATION_SERVICE);

        if (android.os.Build.VERSION.SDK_INT >= android.os.Build.VERSION_CODES.O) {
            NotificationChannel notificationChannel = new NotificationChannel(NOTIFICATION_CHANNEL_ID, NOTIFICATION_CHANNEL_NAME, NotificationManager.IMPORTANCE_HIGH);
            notificationChannel.setLockscreenVisibility(Notification.VISIBILITY_PRIVATE);
            notificationChannel.enableVibration(true);
            notificationChannel.setLightColor(Color.BLUE);
            notificationManager.createNotificationChannel(notificationChannel);
        }

        int i = 0;
        if (j > 0)
            i = j;

        notificationManager.notify(i, builder.build());
    }

    @Override
    public void onNewToken(@NonNull String s) {
        super.onNewToken(s);
        Log.d("TOKEN", s);

        Task<InstanceIdResult> task = FirebaseInstanceId.getInstance().getInstanceId();
        task.addOnSuccessListener(instanceIdResult -> {
            if (task.isSuccessful()) {
                String token = task.getResult().getToken();
                sendRegistrationToServer(token);
                Log.d("TOKEN", token);
            }
        });

        task.addOnFailureListener(e -> {
            if (!task.isSuccessful()) {
                Exception exception = task.getException();
                Log.d("TOKEN", exception.getMessage());
            }
        });
    }

    private void sendRegistrationToServer(String token) {
        FirebaseUser firebaseUser = FirebaseAuth.getInstance().getCurrentUser();
        if (firebaseUser != null) {
            DatabaseReference reference = FirebaseDatabase.getInstance().getReference("Tokens");
            Token token1 = new Token(token);
            reference.child(firebaseUser.getUid()).setValue(token1);
        }
    }
}