mt6735 按一下音量侧键将情景模式由震动调整为标准，关机再开机...

[Audio Profile] 按一下音量侧键将情景模式由震动调整为标准，关机再开机，发现音量为0
[DESCRIPTION]
复现步骤：
1.按音量侧键将情景模式调整成震动；
2.再向上按一格变成标准，进入情景模式->音量->查看铃声音量为1格；
3.关机再开机，进入情景模式->音量->铃声音量为0格
[SOLUTION]
root Cause:
当手机从震动模式上调音量到标准模式，当前音量为1，google默认设计不会将当前音量值存储到DB里面，
导致重新开机后音量还是为震动模式时的0，至于为何google如此设计，目前不得而知。但是从参考机NOTE3上来看，也是存在同样的行为！
如果贵司需要修改请参考如下：
please modify the method setRingerModeInt in the file "base/media/java/android/media/AudioService.java",
Add the code between "// add code start" and "// add code end"
private void setRingerModeInt(int ringerMode, boolean persist) {
......
for (int streamType = numStreamTypes - 1; streamType >= 0; streamType--) {
if (isStreamMutedByRingerMode(streamType)) {
if (！isStreamAffectedByRingerMode(streamType) ||
ringerMode == AudioManager.RINGER_MODE_NORMAL) {
// ring and notifications volume should never be 0 when not silenced
// on voice capable devices
if ((mVoiceCapable &&
mStreamVolumeAlias[streamType] == AudioSystem.STREAM_RING)||
(！mVoiceCapable &&
mStreamVolumeAlias[streamType] == AudioSystem.STREAM_MUSIC)) {
synchronized (mStreamStates[streamType]) {
Set set = mStreamStates[streamType].mIndex.entrySet();
Iterator i = set.iterator();
while (i.hasNext()) {
Map.Entry entry = (Map.Entry)i.next();
if ((Integer)entry.getValue() == 0) {
entry.setValue(10);
}
}
}
// add code start
int streamVolumeAlias = mStreamVolumeAlias[streamType];
int device = getDeviceForStream(streamVolumeAlias);
VolumeStreamState streamState = mStreamStates[streamVolumeAlias];
sendMsg(mAudioHandler,
MSG_SET_DEVICE_VOLUME,
SENDMSG_QUEUE,
device,
0,
streamState,
0);
// add code end
}
mStreamStates[streamType].mute(null, false);
mRingerModemutedStreams &= ~(1 << streamType);
}

不稳定啊

mark1111

路过！