6

应用程序运行时未显示通知。它在应用程序关闭时工作。

MyFirebaseMessagingService.java

    public class MyFirebaseMessagingService extends FirebaseMessagingService {
    private static final String TAG = MyFirebaseMessagingService.class.getSimpleName();

    private NotificationUtils notificationUtils;

    @Override
    public void onMessageReceived(RemoteMessage remoteMessage) {
        Log.e(TAG, "From: " + remoteMessage.getFrom());

        if (remoteMessage == null)
            return;

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

        // Check if message contains a data payload.
        if (remoteMessage.getData().size() > 0) {
            Log.e(TAG, "Data Payload: " + remoteMessage.getData().toString());

            try {
                JSONObject json = new JSONObject(remoteMessage.getData().toString());
                handleDataMessage(json);
            } catch (Exception e) {
                Log.e(TAG, "Exception: " + e.getMessage());
            }
        }
    }

    /**
     * Called if InstanceID token is updated. This may occur if the security of
     * the previous token had been compromised. Note that this is called when the InstanceID token
     * is initially generated so this is where you would retrieve the token.
     */
    @Override
    public void onNewToken(String token) {
        Log.d(TAG, "Refreshed token: " + token);
        PrefManager.setStringPreferences ( Constants.REGID, token );
        // If you want to send messages to this application instance or
        // manage this apps subscriptions on the server side, send the
        // Instance ID token to your app server.
//        sendRegistrationToServer(token);
    }

    private void handleNotification(String message) {
        if (!NotificationUtils.isAppIsInBackground(getApplicationContext())) {
            // app is in foreground, broadcast the push message
            Intent pushNotification = new Intent(Config.PUSH_NOTIFICATION);
            pushNotification.putExtra("message", message);
            LocalBroadcastManager.getInstance(this).sendBroadcast(pushNotification);

            // play notification sound
            NotificationUtils notificationUtils = new NotificationUtils(getApplicationContext());
            notificationUtils.playNotificationSound();
        }else{
            // If the app is in background, firebase itself handles the notification
        }
    }

    private void handleDataMessage(JSONObject json) {
        Log.e(TAG, "push json: " + json.toString());

        try {
            JSONObject data = json.getJSONObject("data");

            String title = data.getString("title");
            String message = data.getString("message");
            boolean isBackground = data.getBoolean("is_background");
            String imageUrl = data.getString("image");
            String timestamp = data.getString("timestamp");
            JSONObject payload = data.getJSONObject("payload");

            Log.e(TAG, "title: " + title);
            Log.e(TAG, "message: " + message);
            Log.e(TAG, "isBackground: " + isBackground);
            Log.e(TAG, "payload: " + payload.toString());
            Log.e(TAG, "imageUrl: " + imageUrl);
            Log.e(TAG, "timestamp: " + timestamp);


            if (!NotificationUtils.isAppIsInBackground(getApplicationContext())) {
                // app is in foreground, broadcast the push message
                Intent pushNotification = new Intent( Config.PUSH_NOTIFICATION);
                pushNotification.putExtra("message", message);
                LocalBroadcastManager.getInstance(this).sendBroadcast(pushNotification);

                // play notification sound
                NotificationUtils notificationUtils = new NotificationUtils(getApplicationContext());
                notificationUtils.playNotificationSound();

//                if (TextUtils.isEmpty(imageUrl)) {
//                    showNotificationMessage(getApplicationContext(), title, message, timestamp, pushNotification);
//                } else {
//                    // image is present, show notification with image
//                    showNotificationMessageWithBigImage(getApplicationContext(), title, message, timestamp, pushNotification, imageUrl);
//                }
            } else {
                // app is in background, show the notification in notification tray
                Intent resultIntent = new Intent(getApplicationContext(), HomeActivity.class);
                resultIntent.putExtra("message", message);

                // check for image attachment
                if (TextUtils.isEmpty(imageUrl)) {
                    showNotificationMessage(getApplicationContext(), title, message, timestamp, resultIntent);
                } else {
                    // image is present, show notification with image
                    showNotificationMessageWithBigImage(getApplicationContext(), title, message, timestamp, resultIntent, imageUrl);
                }
            }
        } catch (JSONException e) {
            Log.e(TAG, "Json Exception: " + e.getMessage());
        } catch (Exception e) {
            Log.e(TAG, "Exception: " + e.getMessage());
        }
    }


      //Showing notification with text only

    private void showNotificationMessage(Context context, String title, String message, String timeStamp, Intent intent) {
        notificationUtils = new NotificationUtils(context);
        intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK | Intent.FLAG_ACTIVITY_CLEAR_TASK);
        notificationUtils.showNotificationMessage(title, message, timeStamp, intent);
    }


     //Showing notification with text and image

    private void showNotificationMessageWithBigImage(Context context,String title,String message,String timeStamp,Intent intent,String imageUrl) {
        notificationUtils = new NotificationUtils(context);
        intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK | Intent.FLAG_ACTIVITY_CLEAR_TASK);
        notificationUtils.showNotificationMessage(title, message, timeStamp, intent, imageUrl);
    }
}

当handleDataMessage()应用程序不在后台时，我将showNotificationMessage(). 但是当我放showNotificationMessage()功能时，通知没有显示应用程序是后台还是前台。

当我评论该功能通知时出现，但仅当应用程序在后台时。

应用程序在前台时如何显示通知？

4

3 回答 3

2

By default notification is shown only if app is not in foreground.

If you want to show notification in tray when app is in foreground add custom method to show notification using NotificationCompat.Builder

and call that method in onMessageReceived like

if (remoteMessage.getNotification() != null){
    Log.d(TAG, "Objects: " + remoteMessage.getNotification());
    generateNotification(getApplicationContext(),remoteMessage.getNotification().getBody());
}

Here is method

private void generateNotification(Context context, String msg) {

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

        String channelId = "channel-fbase";
        String channelName = "demoFbase";
        int importance = NotificationManager.IMPORTANCE_HIGH;

        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
            NotificationChannel mChannel = new NotificationChannel(
                    channelId, channelName, importance);
            notificationManager.createNotificationChannel(mChannel);
        }

        Intent notificationIntent = new Intent(getApplicationContext(), AboutActivity.class);
        notificationIntent.setFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
        PendingIntent pendingIntent = PendingIntent.getActivity(getApplicationContext(), 0, notificationIntent, PendingIntent.FLAG_ONE_SHOT);

        NotificationCompat.Builder mBuilder = new NotificationCompat.Builder(context, channelId);
        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {
            mBuilder.setSmallIcon(R.mipmap.ic_launcher);
            int color = 0x008000;
            mBuilder.setColor(color);
        } else {
            mBuilder.setSmallIcon(R.mipmap.ic_launcher);
        }
        mBuilder.setStyle(new NotificationCompat.BigTextStyle().bigText(msg));

        mBuilder.setContentTitle(msg);
        mBuilder.setContentText(msg);
        mBuilder.setContentIntent(pendingIntent);


        //If you don't want all notifications to overwrite add int m to unique value
        Random random = new Random();
        int m = random.nextInt(9999 - 1000) + 1000;
        mNotificationManager.notify(m, mBuilder.build());
    }
于 2019-06-10T07:51:13.467 回答
0

仅使用Dataobject 而不是Notification.

于 2019-06-10T06:36:14.493 回答
0

如果您收到处于终止状态的通知，那么您正在使用通知有效负载对象。在前台，您必须添加显示通知的代码。您必须在通知中编写通知代码：

if (remoteMessage.getNotification() != null) {
            Log.e(TAG, "Notification Body: " + remoteMessage.getNotification().getBody());
            //Show Notfication
        }

有关更多详细信息，请查看官方链接https://firebase.google.com/docs/cloud-messaging/android/receive

于 2019-06-10T07:37:19.333 回答