推送通知未在 android 上显示

Posted 2023-02-26

【中文标题】推送通知未在 android 上显示

【英文标题】：Push Notifications are not showing on android

【发布时间】：2021-02-23 16:07:58

【问题描述】：

我正在我的应用程序上实现推送通知。不幸的是，在实现它们之后，这些不会在某些设备上显示。一般来说，我可以在 MIUI 设备上试用该应用程序，并且可以正确显示通知。相反，在 android stock（例如模拟器）上，这些没有显示。我确定通知会到达设备上，因为调用了显示通知的函数，但没有显示任何内容。你能帮帮我吗？

谢谢！

private final String NOTIFICATION_CHANNEL_ID = "XXXXX_CHAT_CHANNEL";
private final String GROUP_KEY_CHAT = "XXXXX_GROUP_CHANNEL";

private static NotificationCompat.InboxStyle inboxStyle = new NotificationCompat.InboxStyle();
private static int messageRecived = 0;

private void SendNotification(String body, String title)

    Intent intent = new Intent(getApplicationContext(), MainActivity.class);
    intent.putExtra("firstKeyName","FirstKeyValue");
    PendingIntent pendingIntent = PendingIntent.getActivity(getApplicationContext(), 0, intent, PendingIntent.FLAG_UPDATE_CURRENT);

    if(!isNotificationVisible())
   
        messageRecived = 0;
        inboxStyle = null;
        inboxStyle = new NotificationCompat.InboxStyle();
    

    Notification summaryNotification;
    if(messageRecived == 0)
       
        inboxStyle.addLine(title +": " + body);
        messageRecived += 1;

        summaryNotification =
                new NotificationCompat.Builder(this, NOTIFICATION_CHANNEL_ID)
                        .setContentTitle(title)
                        .setContentText(body)
                        .setSmallIcon(R.drawable.ic_logo)
                        .setGroup(GROUP_KEY_CHAT)
                        .setGroupSummary(true)
                        .setAutoCancel(true)
                        .setContentIntent(pendingIntent)
                        .build();
     else 
        
        inboxStyle.addLine(title +": " + body);
        inboxStyle.setBigContentTitle("Messaggi");
        messageRecived += 1;

        summaryNotification =
                new NotificationCompat.Builder(this, NOTIFICATION_CHANNEL_ID)
                        .setContentTitle("xxxxxxx")
                        .setContentText("Ci sono " + messageRecived + " nuovi messaggi")
                        .setSmallIcon(R.drawable.ic_logo)
                        .setStyle(inboxStyle)
                        .setGroup(GROUP_KEY_CHAT)
                        .setGroupSummary(true)
                        .setAutoCancel(true)
                        .setContentIntent(pendingIntent)
                        .build();
    

    NotificationManagerCompat notificationManager = NotificationManagerCompat.from(this);
    notificationManager.notify(MessageHandler.getInstance().getNotificationID(), summaryNotification);

【参考方案1】：

解决了。我错过了在经理上添加通知渠道。

    if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) 
        int importance = NotificationManager.IMPORTANCE_DEFAULT;
        NotificationChannel channel = new NotificationChannel(NOTIFICATION_CHANNEL_ID, "CHAT_CHANNEL", importance);
        channel.setDescription("NOTIFICATION CHANNEL CHAT");
     
        NotificationManager notificationManager = getSystemService(NotificationManager.class);
        notificationManager.createNotificationChannel(channel);