检测用户是否正在从另一个应用程序中播放音乐

Question

我的游戏具有游戏中的配乐，如果用户正在从Android或iOS上的媒体应用中播放自己的音乐，我想暂停音乐。

是否有一种方法可以有效地在update((函数中运行？

预先感谢！

Answer 1

您可以检查音乐是否如本文所述播放。

AudioManager manager = (AudioManager)this.getSystemService(Context.AUDIO_SERVICE);
if(manager.isMusicActive())
 {
     // do something - or do it not
 }

将其包裹在Java中的一堂课上，然后在AndroidJavaClass API的帮助下从C＃调用它。

---

，但这需要Java。您可以使用该代码并将其转换为C＃，而无需Java。获取UnityPlayerPlayer，活动然后进行上下文。其余的可以通过AndroidJavaClass。

这是不需要Java插件的移植C＃版本。

bool isMusicPlaying()
{
    const string AUDIO_SERVICE = "audio";
    AndroidJavaClass unityClass = new AndroidJavaClass("com.unity3d.player.UnityPlayer");
    AndroidJavaObject unityActivity = unityClass.GetStatic<AndroidJavaObject>("currentActivity");
    AndroidJavaObject unityContext = unityActivity.Call<AndroidJavaObject>("getApplicationContext");
    bool mIsPlaying;
    using (AndroidJavaObject audioManager = unityContext.Call<AndroidJavaObject>("getSystemService", AUDIO_SERVICE))
    {
        mIsPlaying = audioManager.Call<bool>("isMusicActive");
    }
    return mIsPlaying;
}

Answer 2

您必须实现您的应用程序将在其他某些应用程序获得或放弃音频焦点时将收到的回调Onaudiofocuschange((。

AudioManager am = (AudioManager) getSystemService(Context.AUDIO_SERVICE);
// Request audio focus for playback
int result = am.requestAudioFocus(afChangeListener,
                         // Use the music stream.
                         AudioManager.STREAM_MUSIC,
                         // Request permanent focus.
                         AudioManager.AUDIOFOCUS_GAIN);
if (result == AudioManager.AUDIOFOCUS_REQUEST_GRANTED) {
    // Start playback
}

和回调本身：

AudioManager.OnAudioFocusChangeListener afChangeListener = new AudioManager.OnAudioFocusChangeListener() {
public void onAudioFocusChange(int focusChange) {
  if (focusChange == AudioManager.AUDIOFOCUS_LOSS) {
    // Permanent loss of audio focus
    // Pause playback immediately
  } else if (focusChange == AUDIOFOCUS_LOSS_TRANSIENT) {
    // Pause playback
  } else if (focusChange == AUDIOFOCUS_LOSS_TRANSIENT_CAN_DUCK) {
    // Lower the volume, keep playing
  } else if (focusChange == AudioManager.AUDIOFOCUS_GAIN) {
    // Your app has been granted audio focus again
    // Raise volume to normal, restart playback if necessary
  }
}

请看此官方指南：处理音频输出的更改