API级别26上的通知图标

Question

I don't understand which icon android api 26 use for push notification when app is close. When I receive push notification it's always default icon with droid.

I remove all default icon from ressources, set android:roundIcon="@drawable/ic_launcher" (ic_launcher is a png)

Edit : My issue is when this is the system tray display the notification https://firebase.google.com/docs/cloud-messaging/android/receive

Answer 1

The icon which you have set in notification object is display

notification.setSmallIcon(R.drawable.icon);

For Example

NotificationManager notificationManager = (NotificationManager) getSystemService(NOTIFICATION_SERVICE);
    Intent resultIntent = new Intent(getApplicationContext(), MainActivity.class);
    resultIntent.putExtras(bundle);
    PendingIntent contentIntent = PendingIntent.getActivity(this, 0,
            resultIntent, Intent.FLAG_ACTIVITY_NEW_TASK);
    Notification notification;
    Uri sound = Uri.parse("android.resource://" + getPackageName() + "/" + R.raw.notificationsound);
 notification = new Notification.Builder(this)
                .setSmallIcon(R.drawable.lg_logo)
                .setContentTitle(title)
                .setStyle(new Notification.BigTextStyle().bigText(msg))
                .setAutoCancel(true)
                .setContentText(msg)
                .setContentIntent(contentIntent)
                .setSound(sound)
                .build();
    notificationManager.notify(0, notification);

Answer 2

user notification.setSmallIcon(R.drawable.icon); to set the small icon also when using an image don't make it larger than 250px X 250px.

Answer 3

Put below code in You Manifest.xml

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

Also, Make sure icon you have generated is as per the guidelines provided by Google. Here is official guidelines