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、直接调用Android接口设置音量
service call audio 7 i32 3 i32 10 i32 1
Here, the service call refers to IAudioService. Click here for more info. 7 is the function named setStreamVolume. It is the 7th in the list of functions in the interface IAudioService. Verify it here. (setStreamVolume takes 3 parameters streamType, index, flag) i32 is to write the integer INT into the send parcel. (Alternatively we can make use of s16 for UTF-16 string) 3 is streamTypevalue. (Value 1 → phone, 3 → speaker, 4 → alarm, 6 → bluetooth) 1 is index value and 1 is flag value
参考文档:
https://android.stackexchange.com/questions/124249/in-call-volume-root-modify?answertab=active#tab-top
https://android.googlesource.com/platform/frameworks/base/+/73e23e2/media/java/android/media/IAudioService.aidl
6、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
参考文档:
https://android.googlesource.com/platform/frameworks/base/+/android-5.1.1_r1/cmds/media/src/com/android/commands/media/Media.java?autodive=0%2F%2F%2F%2F
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