Firebase云消息未发送通知给所有活动用户

Question

我尝试发送Firebase云消息传递通知，但很少有人收到这些通知。有人可以调查我的问题吗？

以下是我的FirebaseMessagingService代码：

public class MyFirebaseMessagingService extends FirebaseMessagingService {

    @Override
    public void onMessageReceived(RemoteMessage remoteMessage) {
        generateNotification(remoteMessage.getNotification().getBody(),remoteMessage.getNotification().getTitle());
    }

    private void generateNotification(String body,String title)
    {
        Intent intent=new Intent(this, Home_Activity.class);
        intent.setFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);

        PendingIntent pendingIntent=PendingIntent.getActivity(this,0,intent,PendingIntent.FLAG_ONE_SHOT);

        Uri defaultSoundUri= RingtoneManager.getDefaultUri(RingtoneManager.TYPE_NOTIFICATION);

        NotificationCompat.Builder notificationBuilder=new NotificationCompat.Builder(this);
        notificationBuilder.setSmallIcon(R.mipmap.ic_launcher);
        notificationBuilder.setContentTitle(title);
        notificationBuilder.setContentText(body);
        notificationBuilder.setAutoCancel(true);
        notificationBuilder.setSound(defaultSoundUri);

        notificationBuilder.setContentIntent(pendingIntent);

        NotificationManager notificationManager=(NotificationManager)getSystemService(Context.NOTIFICATION_SERVICE);
        notificationManager.notify(0,notificationBuilder.build());
    }
}

以下是我的FirebaseInstanceIdService代码：控制台中每次刷新时令牌也不会打印的一些方式

public class MyFirebaseServiceInstanceId extends FirebaseInstanceIdService {

    private static final String REG_TOKEN="REG_TOKEN";

    @Override
    public void onCreate() {
        super.onCreate();
        FirebaseApp.initializeApp(this);
    }

    @Override
    public void onTokenRefresh()
    {
        String strRecent_Token=FirebaseInstanceId.getInstance().getToken();
        if(strRecent_Token!=null)
            Log.d(REG_TOKEN,strRecent_Token);
        else
            Log.d(REG_TOKEN,"Generated null token");
    }
}

以下是我的清单：

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.udayrepo.classelearn">

    <uses-permission android:name="android.permission.INTERNET" />
    <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
    <uses-permission android:name="android.permission.ACCESS_WIFI_STATE" />

    <application
        android:allowBackup="true"
        android:icon="@mipmap/ic_launcher"
        android:label="@string/app_name"
        android:supportsRtl="true"
        android:theme="@style/AppTheme"
        android:usesCleartextTraffic="true">


        <activity android:name=".Home_Activity">
            <intent-filter>
                <action android:name="android.intent.action.VIEW" />
                <action android:name="android.intent.action.MAIN" />

                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>
        <service android:name=".firebase.MyFirebaseServiceInstanceId">
            <intent-filter>
                <action android:name="com.google.firebase.INSTANCE_ID_EVENT" />
            </intent-filter>
        </service>
        <service android:name=".firebase.MyFirebaseMessagingService">
            <intent-filter>
                <action android:name="com.google.firebase.MESSAGING_EVENT" />
            </intent-filter>
        </service>
    </application>

</manifest>

有人可以帮助我在这里我想念的吗？