FCM 推送通知在 Android 4.4 上不起作用

Posted 2023-02-24

【中文标题】FCM 推送通知在 Android 4.4 上不起作用

【英文标题】：FCM PUSH NOTIFICATION dosen´t work on Android 4.4

【发布时间】：2019-03-23 02:36:49

【问题描述】：

我有一个应用程序，然后在为 android 8.0 编译时完美运行，在手机的通知中心获取通知..

但如果为 android 4.4 编译不起作用，（不会收到通知）

使用此文档：https://docs.microsoft.com/en-us/xamarin/android/data-cloud/google-messaging/firebase-cloud-messaging

代码 => https://github.com/franciscom95/FcmXamarinTest

【参考方案1】：

尝试浏览下面的代码希望这对你有帮助，我目前正在使用这样的代码。

public void showNotification(String message, String title, String action, String value, boolean isImageUrl, String CHANNEL_ID, String BADGE_NUMBER) throws CleverTapPermissionsNotSatisfied, CleverTapMetaDataNotFoundException 
    if (!TextUtils.isEmpty(message)) 
        Intent mainIntent = new Intent(this, HomeScreen.class);
        if (notification_key_values.containsKey(action.toLowerCase())) 
            mainIntent.putExtra("FromPushNotification", true);
            mainIntent.putExtra("PushAction", action);
            if (!isImageUrl) 
                String hash_value = notification_key_values.get(action.toLowerCase());
                if (!hash_value.isEmpty()) 
                    updateNotification(message, hash_value, action, value, extras.getString("TokenId"), extras.getString("SegmentId"), extras.getString("Action"));
                
            
            if (action.toLowerCase().equals("redirectionurl")) 
                mainIntent.putExtra("PushValue", value);
            
         else 
            if (!isImageUrl) 
                updateNotification(message, action, action, value, "", "", "");
                mainIntent.putExtra("FromPushNotification", true);
                mainIntent.putExtra("PushAction", action);
             else 
                mainIntent.putExtra("FromPushNotification", false);
            
        
        mainIntent.putExtras(extras);
        mainIntent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
        mainIntent.setFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP | Intent.FLAG_ACTIVITY_SINGLE_TOP);
        TaskStackBuilder stackBuilder = TaskStackBuilder.create(this);
        stackBuilder.addNextIntent(mainIntent);
        PendingIntent launchIntent;
        launchIntent = stackBuilder.getPendingIntent((int) System.currentTimeMillis(), PendingIntent.FLAG_UPDATE_CURRENT
                | PendingIntent.FLAG_ONE_SHOT);
        Notification notification;
        setLargeIcon = BitmapFactory.decodeResource(this.getResources(),
                R.drawable.appicon);
        Uri notification_sound = RingtoneManager.getDefaultUri(RingtoneManager.TYPE_NOTIFICATION);
        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) 
            CleverTapAPI cleverTapAPI = CleverTapAPI.getInstance(this);
            cleverTapAPI.createNotificationChannel(getApplicationContext(), CHANNEL_ID, CHANNEL_NAME, " ", NotificationManager.IMPORTANCE_HIGH, false);
            NotificationCompat.Builder builder = new NotificationCompat.Builder(this, this.CHANNEL_ID);
            builder.setSmallIcon(getSmallIcon());
            builder.setLargeIcon(setLargeIcon);
            builder.setStyle(style);
            builder.setContentTitle(title);
            builder.setContentText(message);
            notification = builder.build();
            notification.flags |= Notification.FLAG_AUTO_CANCEL;
            notification.contentIntent = launchIntent;
            NotificationManagerCompat notificationManagerCompat = NotificationManagerCompat.from(this);
            notificationManagerCompat.notify((int) System.currentTimeMillis(),notification );
         else 
            if (Build.VERSION.SDK_INT == Build.VERSION_CODES.LOLLIPOP) 
                notification = new NotificationCompat.Builder(this)
                        .setSmallIcon(getSmallIcon())
                        .setLargeIcon(setLargeIcon)
                        .setContentTitle(
                                title)
                        .setContentText(message)
                        .setColor(this.getResources().getColor(R.color.position_blue))
                        .setStyle(style)
                        .setSound(notification_sound)
                        .setAutoCancel(true).build();
             else 
                notification = new NotificationCompat.Builder(this)
                        .setSmallIcon(getSmallIcon())
                        .setContentTitle(
                                title)
                        .setContentText(message)
                        .setStyle(style)
                        .setSound(notification_sound)
                        .setAutoCancel(true).build();
                NotificationCompat.BigTextStyle().bigText(message))
            
            notification.flags |= Notification.FLAG_AUTO_CANCEL;
            notification.contentIntent = launchIntent;
            NotificationManager notificationManager = (NotificationManager) this.getSystemService(Context.NOTIFICATION_SERVICE);
            notificationManager.notify((int) System.currentTimeMillis(), notification);
        
    

【讨论】：

感谢您的回答，它确实有帮助，但不是通知没有显示它们发出声音和振动，但没有显示在 kit kat 4.4 的通知中心，任何建议。

没有图标好像不行。 .setSmallIcon(R.drawable.small_icon);