除非设置图标，否则为什么 Oreo 上的通知不显示

Question

这是平台错误还是我的实现有问题？它似乎与重要性级别无关。 Android 的版本是 8.1.0。 Target SDK 是 22（不幸的是我卡在了那个上面）。

            val defaultChannelId = AppConstants.NOTIFICATION_DEFAULT_ID
            val defaultChannelName = "New Orders - high priority"
            val defaultChannel = NotificationChannel(
                defaultChannelId,
                defaultChannelName,
                NotificationManager.IMPORTANCE_HIGH
            )

            defaultChannel.setSound(defaultSound, attributes)
            defaultChannel.description = "When a new order arrives"

            val notificationManager = NotificationManagerCompat.from(this)
            notificationManager.createNotificationChannel(defaultChannel)

点击按钮时：

出现通知：

val builder = NotificationCompat.Builder(requireContext(), AppConstants.NOTIFICATION_DEFAULT_ID).apply {
                        setContentTitle("New Order Received")
                        setContentText("Fetching order...$payload")
                        setSmallIcon(R.drawable.outline_receipt_white_24)
                        setSound(Uri.parse("android.resource://" + activity?.packageName + "/" + R.raw.notification_decorative))
                        setCategory(NotificationCompat.CATEGORY_STATUS)
                        priority = NotificationCompat.PRIORITY_HIGH
                        setProgress(0, 0, true)
                    }

val notificationManager = NotificationManagerCompat.from(requireContext())
notificationManager.notify(payload, builder.build())

通知没有出现：

val builder = NotificationCompat.Builder(requireContext(), AppConstants.NOTIFICATION_DEFAULT_ID).apply {
                        setContentTitle("New Order Received")
                        setContentText("Fetching order...$payload")
                        setSound(Uri.parse("android.resource://" + activity?.packageName + "/" + R.raw.notification_decorative))
                        setCategory(NotificationCompat.CATEGORY_STATUS)
                        priority = NotificationCompat.PRIORITY_HIGH
                        setProgress(0, 0, true)
                    }

val notificationManager = NotificationManagerCompat.from(requireContext())
notificationManager.notify(payload, builder.build())

Answer 1

Is this a platform bug or some problem in my implementation?

都不是，假设您是在暗示错误出在 Oreo 中。你总是应该提供一个小图标来显示在状态栏中。 Android 的旧版本中存在一个错误，您可以破解 Notification 使其不显示此类图标。恶意软件作者认为这很棒，并且 Google 最终修复了它。

除非设置图标，否则为什么 Oreo 上的通知不显示

Why do notifications on Oreo not display unless an icon is set

android

android-notifications

android-notification-bar