白色方形和灰色背景Firebase推送通知图标

Question

您好我试图使用firebase控制台向我的所有应用用户发送通知，当我发送通知时，我会收到一个方形和灰色背景的通知，如图所示

清单：

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

MyFirebaseMessagingService

private void sendNotification(String messageBody) {
        Intent intent = new Intent(this, MainActivity.class);
        intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
        PendingIntent pendingIntent = PendingIntent.getActivity(this, 0 /* R    equest code */, intent,
                PendingIntent.FLAG_ONE_SHOT);
        Bitmap rawBitmap = BitmapFactory.decodeResource(getResources(),
                R.mipmap.ic_launcher);
        NotificationCompat.Builder notificationBuilder = new NotificationCompat.Builder(this)
                .setSmallIcon(R.mipmap.ic_launcher)
                .setLargeIcon(rawBitmap)
                .setContentTitle("app title")
                .setContentText(messageBody)
                .setAutoCancel(true)
                .setContentIntent(pendingIntent);

        NotificationManager notificationManager =
                (NotificationManager)     getSystemService(Context.NOTIFICATION_SERVICE);

        notificationManager.notify(0 /* ID of notification */, notificationBuilder.build());
    }
}