在 FCM 推送通知上加载片段单击

Question

我在远程服务器上使用 pyFCM 将事件通知推送到我的应用程序。通知也有一个数据负载，这是进行一些 UI 更改所必需的。

当服务器应用向应用发送通知时，手机上会弹出一个通知，按下它会导致打开默认活动。另外，我在扩展 FirebaseMessagingService 的服务中覆盖了 onMessageReceived，然后从消息中获取数据负载并进行处理。

我在 SO 上看到了多个这样的问题：

1. How to open Fragment on click of push notification
2. Open fragment from notification when the app in background
3. How to open fragment page, when pressed a notification in android
4. Open a fragment when press a notification in android

与上述所有 SO 问题的共同点是，它们涉及使用 Notification.Builder 构建通知，然后设置要打开的 Activity（ 或者它是 onNewIntent 被触发取决于它是否是 android:launchMode 是 Manifest 中的 "singleTop" ) 。我的独特理解是，如果使用 FCM 向应用发送数据消息而不是通知，这将起作用。

问题

我真正不明白的是如何在从 FCM 接收到数据之后设置通知帮助我改变从 FCM 的推送接收到的通知的行为。这有可能吗，还是我做错了什么？

这个问题的第二部分是：如何处理用户点击推送通知以在我的活动中加载特定片段（当我不是在应用程序中创建片段的人时 - 刚刚通过 FCM 收到）？

这是在我的应用中运行的当前代码。

onMessageReceived 代码是：

@Override
public void onMessageReceived(RemoteMessage remoteMessagenew) {

    this.remoteMessage = remoteMessagenew;
    super.onMessageReceived (remoteMessage);
    database = MyDatabase.getDatabase(getApplication());
    appuser = database.AppDao().getUserDetails(); 


    Log.d(TAG, "onMessageReceived: ");
    Log.d (TAG, "onMessageReceived: #########################################################");
    Log.d (TAG, "onMessageReceived: #########################################################");
    Log.d (TAG, "onMessageReceived: Message Data is : " + remoteMessage.getData ());


    Map messageData = remoteMessage.getData ();

    // Broadcast
    args = new Bundle ();
    int stage = 0 ;
    Log.d (TAG, "onMessageReceived: ");
    if(messageData.containsKey ("otherid")) {
        incidenthandler(messageData);
    } else  if(messageData.containsKey ("itemid")) {
        itemhandler(messageData);
    }
}

处理要在应用屏幕上刷新的数据的项处理程序

    private void itemhandler(Map messageData) {
    messagebody = remoteMessage.getNotification().getBody();

    if(messageData.containsKey("itemid")) {
        Log.d(TAG, "itemhandler: #######################");
        Log.d(TAG, "itemhandler: #######################");
        Log.d(TAG, "itemhandler: UPDATING");
        Log.d(TAG, "itemhandler: #######################");
        Log.d(TAG, "itemhandler: #######################");

        String item = (String ) messageData.get("itemid");
        JsonParser jsonParser = new JsonParser();
        JsonObject jsonObject = (JsonObject)jsonParser.parse(item);
        item refreshedItem = parseFromJson(jsonObject);
        database.revivDao().upsert(refreshedItem);

    } else {
        // this really shouldn't happen, but putting in a scenario where this does
    // syncing the db with the app
        Log.d(TAG, "itemhandler: #######################");
        Log.d(TAG, "itemhandler: #######################");
        Log.d(TAG, "itemhandler: REFRESHING "); 
        Log.d(TAG, "itemhandler: #######################");
        Log.d(TAG, "itemhandler: #######################");

    // this triggers a call to my intentservice to refresh the db

    Log.d(TAG, "itemhandler: refreshing items");
        Intent intent = new Intent ("refreshitems");
        Bundle clickdata = new Bundle();
        data.putString("item_sub1", item_sub1);
        data.putString("item_sub1", item_sub1);
        intent.putExtra("data", clickdata) ;  // add Bundle to Intent
        localBroadcastManager.getInstance(getApplication()).sendBroadcast(intent); // Broadcast Intent
    }

    String itemid = messageData.get("itemid").toString();
    try{
        Log.d(TAG, "itemhandler: #######################");
        Log.d(TAG, "itemhandler: #######################");
        Log.d(TAG, "itemhandler: sending localbroadcast");
        Log.d(TAG, "itemhandler: #######################");
        Log.d(TAG, "itemhandler: #######################");

    // this is where I try and switch to the screen to display some info - if the app is running

        Intent notificationIntent = new Intent("switchtofragment");
        notificationIntent.putExtra("launchitemfragment", true);
        notificationIntent.putExtra("itemid", itemid);
        notificationIntent.setFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
        if(localBroadcastManager == null) localBroadcastManager = LocalBroadcastManager.getInstance(getApplication());
        localBroadcastManager.sendBroadcast(notificationIntent);

   // now override the notification to load the fragment on click

        setupNotification(itemid, messagebody);
        notificationManager.notify(1, builder.build());

    } catch (NullPointerException e){
        return;
    }
}

最后是处理通知的函数：

private void setupNotification(String housecallid, String message) {
        //Log.d(TAG, "setting up notification");
        String idChannel = ANDROID_CHANNEL_ID;
        Context context = getApplicationContext();

        Intent notificationIntent = new Intent(getApplicationContext(), Reviv.class);
        intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
        notificationIntent.putExtra("housecallid", housecallid);
        notificationIntent.putExtra("launchhousecallfragment", true);
        Bundle extras = new Bundle();
        extras.putBoolean("launchhousecallfragment", true);
        extras.putString("housecallid", housecallid);
        notificationIntent.putExtras(extras);
        notificationIntent.putExtra("data", extras);


        PendingIntent pendingIntent = PendingIntent.getActivity(this,0, notificationIntent,
                PendingIntent.FLAG_UPDATE_CURRENT);

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


        builder = new NotificationCompat.Builder(context, null);
        builder. setSmallIcon(R.drawable.heart)
                .setLargeIcon(BitmapFactory.decodeResource(context.getResources(),
                        R.drawable.heart))
                .setContentIntent(pendingIntent)
                .setContentTitle("Reviv")
                .setContentText(message);

        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
            if(notificationChannel == null) {
                notificationChannel = new NotificationChannel(idChannel, context.getString(R.string.app_name), importance);
                // Configure the notification channel.
                notificationChannel.setDescription("Reviv Housecall Notification");
                notificationChannel.enableLights(true);
                notificationChannel.setLightColor(Color.RED);
                notificationChannel.setVibrationPattern(new long[]{100, 200, 300, 400, 500, 400, 300, 200, 400});
                notificationManager.createNotificationChannel(notificationChannel);
                builder.setChannelId(idChannel);
                builder.setAutoCancel(true);
            }
        } else {
            builder.setContentTitle(context.getString(R.string.app_name))
                    .setPriority(NotificationCompat.PRIORITY_HIGH)
                    .setColor(ContextCompat.getColor(context, R.color.transparent))
                    .setVibrate(new long[]{100, 250})
                    .setLights(Color.RED, 500, 5000)
                    .setAutoCancel(true);
        }
        builder.setContentIntent(pendingIntent);
    }

Answer 1

1. 您可以只发送 data 消息，而不是发送推送消息 + 有效负载并在 onMessageReceived 中接收所有通知，无论应用程序是在前台还是后台。然后，您可以使用您编写的 setupNotification 函数设置通知，并在 Reviv 活动的开头检查额外内容并相应地替换片段。
2. 我不确定这种使用推送通知的方法，但这里有一个建议：尝试查看您是否收到您使用 push 发送的数据负载（检查 getIntent().getExtras()）单击推送通知时默认打开的活动中的通知。