android - 通知无法在 Android Oreo (API 26) 中显示

Question

我在尝试在 Android O 上显示通知时收到此消息。

Use of stream types is deprecated for operations other than volume control

通知直接来自示例文档，在 Android 25 上显示良好。

Answer 1

根据 this Google+ post 上的评论:

those [warnings] are currently expected when using NotificationCompat on Android O devices (NotificationCompat always calls setSound() even if you never pass in custom sound).

until the Support Library changes their code to use the AudioAttributes version of setSound, you'll always get that warning.

因此，您对此警告无能为力。根据 notification channels guide ，Android O 完全不赞成在单个通知上设置声音，而是让您在特定类型的所有通知使用的通知 channel 上设置声音。