java - 推送通知未在通知栏 Android 中显示

You can try using this channel thing introduced in OREO. May be that is causing the issue.

    public class MyFirebaseMessagingService extends FirebaseMessagingService {

    public static final String TAG = "FirebaseSerive";
    public static final String NOTIFICATION_CHANNEL_ID = "IMP_NOTIFICATIONS";


    @Override
    public void onMessageReceived(RemoteMessage remoteMessage) {

        String title = remoteMessage.getNotification().getTitle();
        String body = remoteMessage.getNotification().getBody();

        Notification.Builder notification = new Notification.Builder(this)
                .setContentTitle(title)
                .setContentText(body)
                .setSmallIcon(R.drawable.ss_icon);

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

        if (android.os.Build.VERSION.SDK_INT >= android.os.Build.VERSION_CODES.O) {
            int importance = NotificationManager.IMPORTANCE_HIGH;
            NotificationChannel notificationChannel = new NotificationChannel(NOTIFICATION_CHANNEL_ID, "NOTIFICATION_CHANNEL_NAME", importance);
            notificationChannel.enableLights(true);
            notificationChannel.setLightColor(Color.RED);
            notificationChannel.enableVibration(true);
            notificationChannel.setVibrationPattern(new long[]{100, 200, 300, 400, 500, 400, 300, 200, 400});
            assert mNotificationManager != null;
            notification.setChannelId(NOTIFICATION_CHANNEL_ID);
            mNotificationManager.createNotificationChannel(notificationChannel);
        }

        mNotificationManager.notify(/*notification id*/0, notification.build());
    }
}

Edit: may be you are getting notification payload instead of data, which you can check by using below code.

    // Check if message contains a notification payload.
    if (remoteMessage.getNotification() != null) {
        Log.d(TAG, "Message Notification Body: " + remoteMessage.getNotification().getBody());
    }

java - 推送通知未在通知栏 Android 中显示

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