Firebase Cloud Messaging推送通知在Android Kitkat上不起作用

Question

我正在尝试使用FCM [firebase云消息传递]向我的应用程序添加推送通知功能

该通知将显示在我的Motorola Moto G6-Android 9]上>。但是，通知不会显示在我的Samsung galaxy grand Max-Android 4.4.4上

这是我的代码：

MainActivity：

if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
            NotificationChannel channel = new NotificationChannel("MyNotifications", "MyNotifications", NotificationManager.IMPORTANCE_DEFAULT);

            NotificationManager manager = getSystemService(NotificationManager.class);
            manager.createNotificationChannel(channel);
        }
MyMessagingService.class：

package com......

import android.support.v4.app.NotificationCompat;
import android.support.v4.app.NotificationManagerCompat;

import com.google.firebase.messaging.FirebaseMessagingService;
import com.google.firebase.messaging.RemoteMessage;
import com.innocentapps.musicplayer2.R;

public class MyMessagingService extends FirebaseMessagingService {

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

        showNotification(remoteMessage.getNotification().getTitle(), remoteMessage.getNotification().getBody());

    }

    public void showNotification(String title, String message) {
        NotificationCompat.Builder builder = new NotificationCompat.Builder(this, "MyNotifications")
                .setContentTitle(title)
                .setSmallIcon(R.drawable.ic_tap_and_play)
                .setAutoCancel(true)
                .setContentText(message);

        NotificationManagerCompat managerCompat = NotificationManagerCompat.from(this);
        managerCompat.notify(999, builder.build());
    }

} 

我正在尝试使用FCM [firebase云消息传递]向我的应用程序添加推送通知功能，该通知将显示在我的Motorola Moto G6-Android 9上。但是，通知将不会...

Answer 1

您好，该问题实际上已经解决，但手机已将其作为junk