37-Android之耳机音量加大时警告提示框问题 MTK6739平台
平台: MTK6739 Android10
之前在
34-Android之耳机音量加大时警告提示框问题(展锐SC9820E平台)里说把MTK该问题的解决方法也发布出来. 结果一直偷懒到现在.
当时GCF测试, 反馈了两个问题:
- 设备重启之后, 设备音量没有恢复到安全音量
- 当连续播放20个小时候, 音量没有恢复到安全音量
类:
frameworks/base/services/core/java/com/android/server/audio/AudioService.java
// 问题1:
private void onConfigureSafeVolume(boolean force, String caller) {
synchronized (mSafeMediaVolumeStateLock) {
int mcc = mContext.getResources().getConfiguration().mcc;
if ((mMcc != mcc) || ((mMcc == 0) && force)) {
mSafeMediaVolumeIndex = mContext.getResources().getInteger(
com.android.internal.R.integer.config_safe_media_volume_index) * 10;
mSafeUsbMediaVolumeIndex = getSafeUsbMediaVolumeIndex();
boolean safeMediaVolumeEnabled =
SystemProperties.getBoolean("audio.safemedia.force", false)
|| mContext.getResources().getBoolean(
com.android.internal.R.bool.config_safe_media_volume_enabled);
boolean safeMediaVolumeBypass =
SystemProperties.getBoolean("audio.safemedia.bypass", false);
// The persisted state is either "disabled" or "active": this is the state applied
// next time we boot and cannot be "inactive"
int persistedState;
if (safeMediaVolumeEnabled && !safeMediaVolumeBypass) {
persistedState = SAFE_MEDIA_VOLUME_ACTIVE;
// The state can already be "inactive" here if the user has forced it before
// the 30 seconds timeout for forced configuration. In this case we don't reset
// it to "active".
if (mSafeMediaVolumeState != SAFE_MEDIA_VOLUME_INACTIVE) {
// 此处修改 begin @{
// 在Android10中对mMusicActiveMs进行了持久化存储, mMusicActiveMs 可能不为0,
// 导致mSafeMediaVolumeState的状态为SAFE_MEDIA_VOLUME_INACTIVE, 因此导致了问题1的出现
// if (mMusicActiveMs == 0) {
mSafeMediaVolumeState = SAFE_MEDIA_VOLUME_ACTIVE;
enforceSafeMediaVolume(caller);
LogUtils.d(TAG,"onConfigureSafeVolume mSafeMediaVolumeState: SAFE_MEDIA_VOLUME_ACTIVE: "+SAFE_MEDIA_VOLUME_ACTIVE);
// } else {
// We have existing playback time recorded, already confirmed.
// mSafeMediaVolumeState = SAFE_MEDIA_VOLUME_INACTIVE;
// }
// }@ end
}
} else {
persistedState = SAFE_MEDIA_VOLUME_DISABLED;
mSafeMediaVolumeState = SAFE_MEDIA_VOLUME_DISABLED;
}
mMcc = mcc;
sendMsg(mAudioHandler,
MSG_PERSIST_SAFE_VOLUME_STATE,
SENDMSG_QUEUE,
persistedState,
0,
null,
0);
}
}
}
// 问题2:
// 出现的原因是, 设备系统息屏后, 定时器定时不准导致的
//（设计理想情况是，每隔60秒进行播放时长的检测，但在息屏之后，间隔的检测时长是大于60秒的，可能跟电量优化有关，导致计时器记录时长小于实际播放时长）
// 增加PauseTime相关, 是考虑到超过安全音量的播放过程中，如果中间有暂停，需要将暂停的时间减掉
// 修改此处 begin @{
private static long mMusicStartTime = 0;
private static long mMusicPauseTime1 = 0;
private static List<Long> mCachePauseMusicTimes = new ArrayList<Long>();
private long getPauseTime(){
long pauseTime = 0;
for(Long time : mCachePauseMusicTimes){
pauseTime +=time;
}
return pauseTime;
}
// }@ end
private void onCheckMusicActive(String caller) {
LogUtils.d(TAG,"onCheckMusicActive start caller: "+caller);
synchronized (mSafeMediaVolumeStateLock) {
if (mSafeMediaVolumeState == SAFE_MEDIA_VOLUME_INACTIVE) {
int device = getDeviceForStream(AudioSystem.STREAM_MUSIC);
if ((device & mSafeMediaVolumeDevices) != 0) {
sendMsg(mAudioHandler,
MSG_CHECK_MUSIC_ACTIVE,
SENDMSG_REPLACE,
0,
0,
caller,
MUSIC_ACTIVE_POLL_PERIOD_MS);
int index = mStreamStates[AudioSystem.STREAM_MUSIC].getIndex(device);
if (AudioSystem.isStreamActive(AudioSystem.STREAM_MUSIC, 0)
&& (index > safeMediaVolumeIndex(device))) {
// Approximate cumulative active music time
// 修改此处, begin @{
long tempTime = SystemClock.elapsedRealtime();
int preMusicActiveMs = mMusicActiveMs;
LogUtils.d(TAG,"preMusicActiveMs: " + preMusicActiveMs);
mMusicActiveMs += MUSIC_ACTIVE_POLL_PERIOD_MS;
// 说明刚开始计时，记录音乐开始播放的时间
if(preMusicActiveMs == 1){
mMusicStartTime = tempTime - MUSIC_ACTIVE_POLL_PERIOD_MS;
mCachePauseMusicTimes.clear();
}
// 说明播放过程中，有暂停的情况
if(mMusicPauseTime1 != 0){
// 收集暂停的时长
mCachePauseMusicTimes.add(tempTime - mMusicPauseTime1 - MUSIC_ACTIVE_POLL_PERIOD_MS);
mMusicPauseTime1 = 0;
}
// 当息屏播放音乐，定时器定时不准，会导致计时器记录的时长小于实际播放的时长，因此将实际播放时长赋值给计时器
// (tempTime - mMusicStartTime - getPauseTime())：当前时间 － 音乐开始播放的时间 － 中途暂停的时间 = 实际播放时长
if(mMusicActiveMs < (tempTime - mMusicStartTime - getPauseTime())){
mMusicActiveMs = (int)(tempTime - mMusicStartTime - getPauseTime());
}
// 如果播放时长超过限定的最长播放时厂，开启音量保护，重置计时器
if (mMusicActiveMs > UNSAFE_VOLUME_MUSIC_ACTIVE_MS_MAX) {
setSafeMediaVolumeEnabled(true, caller);
mMusicActiveMs = 0;
mMusicStartTime = 0;
mCachePauseMusicTimes.clear();
}
// 保存播放时长， 持久化存储
saveMusicActiveMs();
} else {
// 记录暂停开始的时间
LogUtils.d(TAG,"no music active");
if(mMusicStartTime != 0 && mMusicPauseTime1 == 0){
LogUtils.d(TAG,"pause active 1");
mMusicPauseTime1 = SystemClock.elapsedRealtime();
}
}
} else {
// 记录暂停开始的时间
LogUtils.d(TAG,"no music active");
if(mMusicStartTime != 0 && mMusicPauseTime1 == 0){
LogUtils.d(TAG,"pause active 1");
mMusicPauseTime1 = SystemClock.elapsedRealtime();
}
}
}else{
// 记录暂停开始的时间
LogUtils.d(TAG,"no music active");
if(mMusicStartTime != 0 && mMusicPauseTime1 == 0){
LogUtils.d(TAG,"pause active 1");
mMusicPauseTime1 = SystemClock.elapsedRealtime();
}
}
}
}
// }@ end
本文地址：https://blog.csdn.net/liumengluo/article/details/109604702
