修改此文件frameworks/base/media/java/android/media/AudioService.java中函数
private int getActiveStreamType(int suggestedStreamType) { ...............
...............
else if (suggestedStreamType == AudioManager.USE_DEFAULT_STREAM_TYPE) { /* carroll 修改音量键默认调节多媒体音量 start */
/* if (isAfMusicActiveRecently(StreamOverride.sDelayMs)) {
if (DEBUG_VOL) Log.v(TAG, "getActiveStreamType: forcing STREAM_MUSIC");*/
return AudioSystem.STREAM_MUSIC;
/* } else {
if (DEBUG_VOL) Log.v(TAG,
"getActiveStreamType: using STREAM_NOTIFICATION as default");
return AudioSystem.STREAM_NOTIFICATION;
}*/
/* carroll 修改音量键默认调节多媒体音量 end */
}
break;
}
if (DEBUG_VOL) Log.v(TAG, "getActiveStreamType: Returning suggested type "
+ suggestedStreamType);
return suggestedStreamType;
}
重新编译后,按音量键提示栏为多媒体音量
参考:https://blog.csdn.net/deng0zhaotai/article/details/45058935