Firebase 推送通知在后台应用程序时显示错误图标

Question

I'm using Firebase push notifications in my app that come from a server. When the app is in foreground, the correct notification icon is displayed. But when the app is in background, there's a filled circle instead of the notification icon.

I have looked at similar issues, and I am using the correct values in my manifest. Here's what I have in my manifest:

<meta-data
    android:name="com.google.firebase.messaging.default_notification_icon"
    android:resource="@drawable/ic_stat_name" />
<meta-data
    android:name="com.google.firebase.messaging.default_notification_color"
    android:resource="@color/colorPrimary" />

The notification color value seems to be working correctly. The filled circle is that of my app's primary color, and if I change it to some random RGB value, it updates. But the notification icon is always a filled circle no matter what.

And here is how I'm handling my notifications when in foreground, but that works correctly:

private fun showNotification(notification: RemoteMessage) {
    createNotificationChannel()

    val notificationId = notification.data["notificationId"]
    val feedItemId = notification.data["itemId"]
    val feedType = notification.data["type"]

    val intent = Intent(this, MainActivity::class.java).apply {
        flags = Intent.FLAG_ACTIVITY_SINGLE_TOP or Intent.FLAG_ACTIVITY_CLEAR_TOP
        putExtra(EXTRA_NOTIFICATION, true)
        putExtra(EXTRA_NOTIFICATION_ID, notificationId)
        putExtra(EXTRA_NOTIFICATION_FEED_ITEM_ID, feedItemId)
        putExtra(EXTRA_NOTIFICATION_FEED_TYPE, feedType)
    }

    val pendingIntent = PendingIntent.getActivity(this, (0..1000).random(), intent, PendingIntent.FLAG_ONE_SHOT)

    val builder = NotificationCompat.Builder(this, getString(R.string.notification_channel_id))
        .setSmallIcon(R.drawable.ic_stat_name)
        .setContentTitle(notification.notification?.title ?: "")
        .setContentText(notification.notification?.body ?: "")
        .setStyle(NotificationCompat.BigTextStyle()
            .bigText(notification.notification?.body ?: ""))
        .setPriority(NotificationCompat.PRIORITY_DEFAULT)
        .setAutoCancel(true)
        .setContentIntent(pendingIntent)

    with(NotificationManagerCompat.from(this)) {
        notify(System.currentTimeMillis().toInt(), builder.build())
    }
}

So the notification icon is not the problem (as suggested in similar questions), as it displays correctly when the app is in foreground.

Answer 1

I had this exact problem and for me what solved it was adding this to the AndroidManifest.xml .

<meta-data android:name="com.google.firebase.messaging.default_notification_icon"
            android:resource="@drawable/ic_notification" />