如何知道正在使用哪个卷流？

Question

许多人可能都知道，Android有很多卷流，例如：

STREAM_ALARM        The audio stream for alarms
STREAM_DTMF         The audio stream for DTMF Tones
STREAM_MUSIC        The audio stream for music playback
STREAM_NOTIFICATION The audio stream for notifications
STREAM_RING         The audio stream for the phone ring
STREAM_SYSTEM       The audio stream for system sounds
STREAM_VOICE_CALL   The audio stream for phone calls

我想知道当前正在使用哪个卷流。我尝试在Audio Manager类中使用getMode（）方法，但它返回不相关的信息。

Answer 1

Register a receiver for action : android.media.VOLUME_CHANGED_ACTION
and check for extra value of "EXTRA_VOLUME_STREAM_TYPE" in onReceive