Adb命令修改多媒体音量

1、查看audio的全部信息（各音频流音量，焦点，策略等）

dumpsys audio

2、设置音量并且显示音量UI

//stream 3表示多媒体，10表示音量值

media volume --show --stream 3 --set 10

3、音量调大调小

media volume --stream 3 --adj raise
media volume --stream 0 --adj lower
media volume --show --stream 3 --adj raise
media volume --show --stream 0 --adj lower

4、获取当前音量

media volume --stream 3 --get

5、控制播放暂停

media dispatch play
media dispatch pause

详细用法：

usage: media [subcommand] [options]
       media dispatch KEY
       media list-sessions
       media monitor <tag>
       media volume [options]
media dispatch: dispatch a media key to the system.
                KEY may be: play, pause, play-pause, mute, headsethook,
                stop, next, previous, rewind, record, fast-forward.
media list-sessions: print a list of the current sessions.
media monitor: monitor updates to the specified session.
                       Use the tag from list-sessions.
media volume:  the options are as follows:
                --stream STREAM selects the stream to control, see AudioManager.STREAM_*
                                controls AudioManager.STREAM_MUSIC if no stream is specified
                --set INDEX     sets the volume index value
                --adj DIRECTION adjusts the volume, use raise|same|lower for the direction
                --get           outputs the current volume
                --show          shows the UI during the volume change
        examples:
                adb shell media volume --show --stream 3 --set 11
                adb shell media volume --stream 0 --adj lower
                adb shell media volume --stream 3 --get