Android-уведомление Firebase Cloud

Question

У меня есть приложение с Android Studio и мобильный телефон с Android 9, я также использую облачные сообщения Firebase.

Когда отправлять сообщение, приходите на телефон, но если приложение не работает в фоновом режиме, не открываетсяактивность только MainActivity.

У меня есть такие реализации:

implementation 'com.google.firebase:firebase-auth:16.0.5'
    implementation 'com.google.firebase:firebase-messaging:17.5.0'
    implementation 'com.google.firebase:firebase-database:16.0.4'
    implementation 'com.google.firebase:firebase-storage:16.0.4'
    implementation 'com.google.firebase:firebase-firestore:17.1.2'

И это мой код Java на Android

private final String ADMIN_CHANNEL_ID ="admin_channel";

@Override
public void onMessageReceived(RemoteMessage remoteMessage) {
    NotificationManager notificationManager =
            (NotificationManager)getSystemService(Context.NOTIFICATION_SERVICE);

    int notificationID = new Random().nextInt(3000);

  /*
    Apps targeting SDK 26 or above (Android O) must implement notification channels and add its notifications
    to at least one of them. Therefore, confirm if version is Oreo or higher, then setup notification channel
  */
  System.out.println("Sdk " + Build.VERSION.SDK_INT);
    Notification.Builder notificationBuilder = null;
    final Intent intent = new Intent(this, DashboardActivity.class);
    intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK
            | Intent.FLAG_ACTIVITY_CLEAR_TASK );
    PendingIntent pendingIntent = PendingIntent.getActivity(this,
            0, intent,PendingIntent.FLAG_UPDATE_CURRENT);

    Uri notificationSoundUri = RingtoneManager.getDefaultUri(RingtoneManager.TYPE_NOTIFICATION);
    if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
        //setupChannels(notificationManager);
        CharSequence name = "New notification";
        String description = "Device to devie notification";
        int importance = NotificationManager.IMPORTANCE_HIGH;
        NotificationChannel channel = new NotificationChannel(ADMIN_CHANNEL_ID, name, importance);
        channel.setDescription(description);
        notificationManager.createNotificationChannel(channel);

        notificationBuilder = new Notification.Builder(this, ADMIN_CHANNEL_ID)
                .setSmallIcon(R.drawable.logopqno)
                .setContentTitle(remoteMessage.getData().get("title"))
                .setContentText(remoteMessage.getData().get("message"))
                .setAutoCancel(true)
                .setSound(notificationSoundUri)
                .setOnlyAlertOnce(false)
                .setChannelId(ADMIN_CHANNEL_ID)
                .setContentIntent(pendingIntent);

    } else {
        notificationBuilder = new Notification.Builder(this, ADMIN_CHANNEL_ID)
                .setSmallIcon(R.drawable.logopqno)
                .setContentTitle(remoteMessage.getData().get("title"))
                .setContentText(remoteMessage.getData().get("message"))
                .setAutoCancel(true)
                .setSound(notificationSoundUri)
                .setOnlyAlertOnce(false)
                .setContentIntent(pendingIntent);
    }
    //Set notification color to match your app color template
    if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP){
        notificationBuilder.setColor(getResources().getColor(R.color.colorPrimaryDark));
    }
    notificationManager.notify(notificationID, notificationBuilder.build());
}

@RequiresApi(api = Build.VERSION_CODES.O)
private void setupChannels(NotificationManager notificationManager){
    CharSequence adminChannelName = "New notification";
    String adminChannelDescription = "Device to devie notification";

    NotificationChannel adminChannel;
    adminChannel = new NotificationChannel(ADMIN_CHANNEL_ID,
            adminChannelName, NotificationManager.IMPORTANCE_HIGH);
    adminChannel.setDescription(adminChannelDescription);
    adminChannel.enableLights(true);
    adminChannel.setLightColor(Color.RED);
    adminChannel.enableVibration(true);
    if (notificationManager != null) {
        notificationManager.createNotificationChannel(adminChannel);
    }
}

Это мой манифест

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

    <uses-permission android:name="android.permission.VIBRATE" />

    <dist:module dist:instant="true" />

    <uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" />
    <uses-permission android:name="android.permission.ACCESS_LOCATION_EXTRA_COMMANDS" />
    <uses-permission android:name="android.permission.INTERNET" />
    <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
    <uses-permission android:name="android.permission.CALL_PHONE" />
    <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" /> <!-- Added by @BM since 08 2019 Nov -->
    <uses-permission android:name="android.permission.RECEIVE_WAP_PUSH" />
    <uses-permission android:name="com.google.android.c2dm.permission.RECEIVE" />

    <application
        android:allowBackup="true"
        android:icon="@mipmap/ic_launcher"
        android:label="@string/app_name"
        android:networkSecurityConfig="@xml/network_security_config"
        android:roundIcon="@mipmap/ic_launcher_round"
        android:supportsRtl="true"
        android:theme="@style/AppTheme">
        <activity
            android:name=".notification.DashboardActivity"
            android:label="@string/title_activity_dashboard"
            android:parentActivityName=".MainActivity"
            android:theme="@style/AppTheme.NoActionBar" />
        <activity android:name=".MainActivity">
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />

                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>

        <service
            android:name=".notification.MyFirebaseMessagingService"
            android:permission="com.google.android.c2dm.permission.SEND">
            <intent-filter>
                <action android:name="com.google.firebase.MESSAGING_EVENT" />
                <action android:name="com.google.android.c2dm.intent.RECEIVE" />
            </intent-filter>
        </service>
        <service android:name=".notification.MyFirebaseInstanceIDService">
            <intent-filter>
                <action android:name="com.google.firebase.INSTANCE_ID_EVENT" />
            </intent-filter>
        </service>
    </application>

</manifest>