为什么推送通知图标是白色的，而不是使用 FCM 的应用程序图标 android

Question

在棉花糖中=显示白色图标。 在奇巧中 = 显示应用程序图标。 在奥利奥 = 在后台时显示带有应用程序图标的通知，但在前台时通知到达但不显示。

@RequiresApi(api = Build.VERSION_CODES.JELLY_BEAN)
@Override
public void onMessageReceived(RemoteMessage remoteMessage) {
    Log.e(TAG, "From: " + remoteMessage.getFrom());
    if (remoteMessage == null)
        return;
    // Check if message contains a notification payload.
    if (remoteMessage.getNotification() != null) {
        Log.e(TAG, "Notification Body: " + remoteMessage.getNotification().getBody());
        handleNotification(remoteMessage.getNotification().getBody());
    }
    // Check if message contains a data payload.
    if (remoteMessage.getData().size() > 0) {
        //Log.e(TAG, "Data Payload: " + remoteMessage.getData().toString());
        String title = remoteMessage.getData().get("title");
        String message = remoteMessage.getData().get("body");
        String click_action = remoteMessage.getData().get("click_action");
        System.out.println("clickAction==@@@" + click_action);
        handleDataMessage(title, message, click_action);
    }
}
private void handleNotification(String message) {
    Intent pushNotification = new Intent(Config.PUSH_NOTIFICATION);
    pushNotification.putExtra("message", message);
    LocalBroadcastManager.getInstance(this).sendBroadcast(pushNotification);
    // play notification sound
    NotificationUtils notificationUtils = new NotificationUtils(getApplicationContext());
    notificationUtils.playNotificationSound();
}

@RequiresApi(api = Build.VERSION_CODES.JELLY_BEAN)
private void handleDataMessage(String noti_title,String noti_message,String noti_click_action) {
    try {
        System.out.println("noti_title="+ noti_title);
        System.out.println("noti_message="+ noti_message);
        System.out.println("noti_click_action="+ noti_click_action);
        Intent intent=new Intent(noti_click_action);
        intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
        PendingIntent pendingIntent=PendingIntent.getActivity(this,0,intent,PendingIntent.FLAG_ONE_SHOT);
        NotificationCompat.Builder notificationBuilder=new NotificationCompat.Builder(this);
        notificationBuilder.setContentTitle(noti_title);
        notificationBuilder.setContentText(noti_message);
        notificationBuilder.setSmallIcon(R.mipmap.ic_launcher);
        notificationBuilder.setAutoCancel(true);
        notificationBuilder.setContentIntent(pendingIntent);
        NotificationManager notificationManager=(NotificationManager)getSystemService(Context.NOTIFICATION_SERVICE);
        notificationManager.notify(0,notificationBuilder.build());

    } catch (Exception e) {
        Log.e(TAG, "Exception: " + e.getMessage());
    }
}

/**
 * Showing notification with text only
 */
@RequiresApi(api = Build.VERSION_CODES.JELLY_BEAN)
private void showNotificationMessage(Context context, String title, String message, String timeStamp, Intent intent) {
    notificationUtils = new NotificationUtils(context);
    intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK | Intent.FLAG_ACTIVITY_CLEAR_TASK);
    notificationUtils.showNotificationMessage(title, message, timeStamp, intent);
}
/**
 * Showing notification with text and image
 */
@RequiresApi(api = Build.VERSION_CODES.JELLY_BEAN)
private void showNotificationMessageWithBigImage(Context context, String title, String message, String timeStamp, Intent intent, String imageUrl) {
    notificationUtils = new NotificationUtils(context);
    intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK | Intent.FLAG_ACTIVITY_CLEAR_TASK);
    notificationUtils.showNotificationMessage(title, message, timeStamp, intent, imageUrl);
}

使用上面的代码，我得到了不同版本的不同图标。有什么错误吗？

Answer 1

似乎

后端正在通知密钥中发送数据，然后图标的控制权来自服务器，您无法处理它要求后端向您发送带有 null 的通知并发送数据密钥中的所有数据

Answer 2

据我所知，你应该有一个白色透明的图标。因此，如果您有彩色图标，则显示方式会有所不同。

notificationBuilder.setSmallIcon(R.mipmap.ic_launcher);

这是一个常见的错误。您必须创建自己的PNG并将其放在@drawable中。绘制一个轮廓，仅包含白色(和透明背景(。

Answer 3

你需要在AndroidManifest中添加它.xml

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

此外，对于您的通知生成器，将相同的图标设置为

notificationBuilder.setSmallIcon(R.drawable.statusbar_not_icon)

如何创建状态栏图标？