Group ID being ignored when creating NotificationChannel

问题

I'm migrating my apps to Android O (API 26), notification channel group ID always got ignored when creating NotificationChannel:

NotificationManager nm;
nm.createNotificationChannelGroup(new NotificationChannelGroup("test_group", "Test"));
NotificationChannel newCh = new NotificationChannel("test_channel:id123", "Test", NotificationManager.IMPORTANCE_NORMAL);
newCh.setGroup("test_group");
nm.createNotificationChannel(newCh);

NotificationChannel ch = nm.getNotificationChannel("test_channel:id123"); // ch.getGroup() is null

回答1:

You can't use colon ":" in channel ID, change ":" to other characters like underscore "_" will work.

来源：https://stackoverflow.com/questions/45886170/group-id-being-ignored-when-creating-notificationchannel