前言

对于Android播放一些简短音效，例如提示音，或者铃声，相对于使用MediaPlayer，SoundPool可以节省更多资源，并且可以同时播放多个音效，而且可以针对不同音效设置不同播放品质

实现

SoundPool的具体作用，就不再阐述，直接贴代码

private SoundPool.Builder spBuilder;
private SoundPool soundPool;
private Integer[] fmSound = FmManager.getRawAudios();

 if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {
      if (null == spBuilder) {
        spBuilder = new SoundPool.Builder();
        AudioAttributes.Builder builder = new AudioAttributes.Builder();
        builder.setLegacyStreamType(AudioManager.STREAM_MUSIC);
        spBuilder.setAudioAttributes(builder.build());
        spBuilder.setMaxStreams(10);
      }
      if (null == soundPool) {
        soundPool = spBuilder.build();
      }
    } else {
      if (null == soundPool) {
        soundPool = new SoundPool(10, AudioManager.STREAM_MUSIC, 10); //最多播放10个音效，格式为Steam_music，音质为10
      }
    }
    soundPool.setOnLoadCompleteListener(this);
    if (null == fmArray) {
      fmArray = new SparseIntArray();
    }
    if (null == streamArray) {
      streamArray = new SparseIntArray();
    }
    for (int i = 0; i < fmSound.length; i++) {
      fmArray.put(i + 1, soundPool.load(this, fmSound[i], 1));  //将需要播放的资源添加到SoundPool中，并保存返回的StreamID，通过StreamID可以停止某个音效
    }


 private void playFmByPosition(int resultId) {
    if (null == soundPool || resultId < 0 || fmArray == null || fmArray.size() < 0 || streamArray == null)
      return;
    LogUtils.e(resultId + "------------" + fmArray.size());

    if (resultId < fmArray.size()) {
      if (!FmPlaying.isPlay(resultId)) {
        int fmPlayId = soundPool.play(fmArray.get(resultId + 1), 1, 1, 0, -1, 1);
        streamArray.put(resultId, fmPlayId);
        FmPlaying.setPlay(resultId, true);
      } else {
        soundPool.stop(streamArray.get(resultId));
        streamArray.removeAt(resultId);
        FmPlaying.setPlay(resultId, false);
      }
    }
  }

  static class FmPlaying {
    private static SparseBooleanArray playArray = new SparseBooleanArray();

    public static boolean isPlay(int position) {
      return playArray.get(position, false);
    }

    public static void setPlay(int position, boolean play) {
      playArray.put(position, play);
    }
}

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