notification-channel

问题 I have an app which will recieve FCM notifications.App was recieved notifications on os below Android oreo devices. But notificatons are not recieving in android oreo device.Instead of notification it gets toast "developer warning for package failed to post notification on channel null". I searched and understand that Notification channels are required.But I dont know where it is to be added.Please give me guidance.The toast is appearing on 8.0 emulator.In real device nothing is coming. 回答1:

问题 I have an app which will recieve FCM notifications.App was recieved notifications on os below Android oreo devices. But notificatons are not recieving in android oreo device.Instead of notification it gets toast "developer warning for package failed to post notification on channel null". I searched and understand that Notification channels are required.But I dont know where it is to be added.Please give me guidance.The toast is appearing on 8.0 emulator.In real device nothing is coming. 回答1:

问题 I've been implementing Notification Channels in my android app to support recent android versions. You can set the notification channel id when sending messages from the firebase web console, but I was not able to find out how to set the channel id when sending messages via fcm rest api. Notification channels are not mentioned in the reference (https://firebase.google.com/docs/reference/fcm/rest/v1/projects.messages), but I am pretty sure there must be a way to set the channel id. 回答1: The

问题 I am working on an application where we have to generate a notification with action buttons. It was working fine till the date we decided to update our notification handling to support notification channels (released with Android Oreo 8.0). I don't know if this is the reason or there is something missing in our implementation that made notification action buttons unResponsive. Below mentioned is the code snippet... NotificationCompat.Builder localCallNotificationBuilder = new

问题 My app now has 3 notification channels, I want to remove 2 of them. I thought simply not registering 2 channels would do the trick but when I open the notification settings on the Android device, the old channels still appear. Is it possible to remove them? They have no use and can confuse the users. 回答1: Notification channels stay forever once they are created. To remove them again, simply call deleteNotificationChannel() on the NotificationManager with the ID of the channel you want to

问题 I want to start a foreground service in Android 8 and I want to know how are foreground services compatible with the notification channel system. Let's say we start a foreground service, then we immediately create the required notification and assign it to a notification channel. Suddenly, the user decides to go into System Settings and disable the notification channel. What happens in this case? Will the service become a background service? Does it get killed? I haven't found a documented

问题 I know this question has been asked several times before. But none of the solutions worked for me. That's why I would like to ask the question again. The following line only accepts NotificationCompat.Builder(context) : NotificationCompat.Builder notificationBuilder = new NotificationCompat.Builder(context, ADMIN_CHANNEL_ID) // Getting error I have fulfilled: importing android.support.v4.app.NotificationCompat My support libraries version is above 25 implementation group: 'com.android.support

问题 I need to generate notifications when a PUSH notification is received but also I need to generate notifications (for display them in the notification bar of the device) when something happens in the application, so I'm using NotificationCompat.Builder for it. As you know, android has deprecated this call to Notification.Builder: Notification.Builder (Context context) And now you must use this call: NotificationCompat.Builder (Context context, String channelId) What happens if you don't want

问题 Is there any callback my application receives when user blocks a Notification Channel created by my application OR it can be detected later ? 回答1: No, there is no such listener provided by the APIs. You will have to check each time before you make a notification. From the developer document To find out if a user blocked a notification channel, you can call getImportance(). If the notification channel is blocked, getImportance() returns IMPORTANCE_NONE. 回答2: Starting from Android P, there is a

问题 What's the Intent that I need to send to open the settings of a Notification Channel that I've previously created in my app? I need it to link from my settings activity. 回答1: To open the settings for a single channel, you can use ACTION_CHANNEL_NOTIFICATION_SETTINGS: Intent intent = new Intent(Settings.ACTION_CHANNEL_NOTIFICATION_SETTINGS) .putExtra(Settings.EXTRA_APP_PACKAGE, context.getPackageName()) .putExtra(Settings.EXTRA_CHANNEL_ID, yourChannelId); startActivity(intent); Using ACTION