mVolumeReceiver =newMyVolumeReceiver() ; IntentFilter filter =newIntentFilter() ; filter.addAction("android.media.VOLUME_CHANGED_ACTION") ; registerReceiver(mVolumeReceiver, filter) ; } 销毁代码: 1 2 3 4 5 //销毁监听音量的广播 privatevoidmyUnRegisterRecevier(){ unregisterReceiver(mVolumeReceiver...
跟进VolumePanel,发现这个类是一个handle,在postVolumeChanged()方法里面有如下代码: publicvoid postVolumeChanged(int streamType,int flags) { if (hasMessages(MSG_VOLUME_CHANGED))return; removeMessages(MSG_FREE_RESOURCES); obtainMessage(MSG_VOLUME_CHANGED, streamType, flags).sendToTarget(); } 这里利用了...
I am using a service in my mp3 player to play media. I use mediaplayer object to play music. Normally the volume keys work when the music is playing. I also used Telephony Manager in my service to check phone calls. And I start and stop the music when the call is disconnected and ...
checkSafeMediaVolume(streamTypeAlias, aliasIndex + step, device)) { Log.e(TAG, "adjustStreamVolume() safe volume index = "+oldIndex); mVolumeController.postDisplaySafeVolumeWarning(flags); //判断streamState.adjustIndex返回值,如果音量值在调整之后并没有发生变化,比如到了最大值,就不需要继续后面的...
[Android.Runtime.Register("android/media/MediaPlayer", DoNotGenerateAcw=true)] public class MediaPlayer : Java.Lang.Object, Android.Media.IAudioRouting, Android.Media.IVolumeAutomation, IDisposable, Java.Interop.IJavaPeerable继承 Object Object MediaPlayer 属性...
IVolumeAutomation JetPlayer JetPlayer.IOnJetEventListener JetPlayer.JetEventEventArgs JetPlayer.JetNumQueuedSegmentUpdateEventArgs JetPlayer.JetPauseUpdateEventArgs JetPlayer.JetUserIdUpdateEventArgs MasteringIndicationType MediaActionSound MediaActionSoundType MediaCas MediaCas.IEventListener MediaCas.MediaCasEventArgs Medi...
AudioService.java文件位于/framework/base/media/java/android/media/下。 音量控制是AudioService最重要的功能之一。先总结一下: AudioService音量管理的核心是VolumeStreamState。它保存了一个流类型所有的音量信息。 VolumeStreamState保存了运行时的音量信息,而音量的生效则是在底层AudioFlinger完成的。所以进行音量设置需...
public float Volume { [Android.Runtime.Register("getVolume", "()F", "", ApiSince=26)] get; } 属性值 Single 卷,以线性方式表示为介于 0.f 和 1.f 之间的值。 属性 RegisterAttribute 注解 返回归咎于此的 VolumeShaper当前卷刻度。 这是用于玩家的最后一VolumeShaper个卷;如果尚未启动VolumeShaper...
IVolumeAutomation JetPlayer JetPlayer.IOnJetEventListener JetPlayer.JetEventEventArgs JetPlayer.JetNumQueuedSegmentUpdateEventArgs JetPlayer.JetPauseUpdateEventArgs JetPlayer.JetUserIdUpdateEventArgs MasteringIndicationType MediaActionSound MediaActionSoundType MediaCas MediaCas.IEventListener MediaCas.MediaCasEventArgs Med...
auto vol = std::shared_ptr<android::vold::VolumeBase>( newandroid::vold::EmulatedVolume("/data/media",0)); vol->setMountUserId(0); vol->create(); //把虚拟卷放入mInternalEmulatedVolumes mInternalEmulatedVolumes.push_back(vol); 省略代码... return...