闪避后声音没有恢复正常

如何解决闪避后声音没有恢复正常

我正在通过我的应用播放声音，并尝试遵循让系统在播放我的声音时避开其当前声音的准则。虽然它似乎并不总是有效。一些用户报告说他们的音乐在闪避后没有出现。关于原因的任何想法？

我已尽力遵循本指南https://developer.android.com/guide/topics/media-apps/audio-focus?authuser=2

这是我在 android 10+ 上的实现：

playSound 对应用程序的其余部分公开

fun playDing() {
    val mediaPlayer = MediaPlayer.create(context,R.raw.sound_ding)
    requestPlaySoundAndroid10(mediaPlayer)
}

这里是 requestSound。它向返回响应的系统发送焦点请求。根据响应，我播放或关闭声音。我主要播放声音并隐藏音频，因此请求似乎有效。

private fun requestPlaySoundAndroid10(mediaPlayer: MediaPlayer) {

    val audioAttributes = AudioAttributes.Builder().let {
        it.setUsage(AudioAttributes.USAGE_NOTIFICATION)
        it.setContentType(AudioAttributes.CONTENT_TYPE_SONIFICATION)
        it.build()
    }

    val afRequest = AudioFocusRequest.Builder(AudioManager.AUDIOFOCUS_GAIN_TRANSIENT_MAY_DUCK).let { request ->
        request.setFocusGain(AudioManager.AUDIOFOCUS_GAIN_TRANSIENT_MAY_DUCK)
        request.setAudioAttributes(audioAttributes)
        request.setAcceptsDelayedFocusGain(true)
        request.setOnAudioFocusChangeListener {  }
        request.build()
    }
    val response = audioManager.requestAudioFocus(afRequest)

    when(response){
        AudioManager.AUDIOFOCUS_REQUEST_GRANTED -> playSound(mediaPlayer,afRequest)
        else -> closeSound(mediaPlayer,afRequest)
    }
}

然后播放声音（）。它设置媒体播放器并启动声音

private fun playSound(mediaPlayer: MediaPlayer,request: AudioFocusRequest){

    mediaPlayer.setOnCompletionListener {
        closeSound(mediaPlayer,request)
    }
    mediaPlayer.start()
}

和 closeSound()。当声音播放完毕时，我释放资源并放弃请求。系统应该重新打开音乐，但没有。

private fun closeSound(mediaPlayer: MediaPlayer,audioFocusRequest: AudioFocusRequest){
    audioManager.abandonAudioFocusRequest(audioFocusRequest)
    mediaPlayer.release()
}