項(xiàng)目中需要用到語音提示，且都是比較簡短的語音提示，剛開始的時(shí)候用的是MediaPlayer進(jìn)行語音播放，但是查閱資料發(fā)現(xiàn)MediaPlayer主要是用來進(jìn)行長音頻播放，且資源消耗較高，后發(fā)現(xiàn)SoundPool進(jìn)行語音播放時(shí)資源消耗更少，且響應(yīng)速度更快，就寫了一個(gè)簡單的SoundPool工具類，主要是用來進(jìn)行短音頻播放，還可以判斷當(dāng)前是否有音頻正在播放。
工具類代碼如下：

/**
 * 簡短音頻播放工具類
 */
public class SoundPoolUtil {
    private volatile static SoundPoolUtil client;
    private SoundPool mSoundPool;
    private AudioManager mAudioManager;
    /*允許同時(shí)播放的音頻數(shù)（為1時(shí)會(huì)立即結(jié)束上一個(gè)音頻播放當(dāng)前的音頻）*/
    private static final int MAX_STREAMS = 1;
    // Stream type.
    private static final int streamType = AudioManager.STREAM_MUSIC;
    private int mSoundId;
    private int mResId;
    private Context mainContext;

    public static SoundPoolUtil getInstance(Context context) {
        if (client == null)
            synchronized (SoundPoolUtil.class) {
                if (client == null) {
                    client = new SoundPoolUtil(context);
                }
            }
        return client;
    }

    private SoundPoolUtil(Context context) {
        this.mainContext = context;
        mAudioManager = (AudioManager) this.mainContext.getSystemService(Context.AUDIO_SERVICE);
        ((Activity) this.mainContext).setVolumeControlStream(streamType);
        this.mSoundPool = new SoundPool(MAX_STREAMS, streamType, 0);
    }


    /**
     * 播放音頻
     * @param resId 本地音頻資源
     */
    public void playSoundWithRedId(int resId) {
        this.mResId = resId;
        this.mSoundId = this.mSoundPool.load(this.mainContext, this.mResId, 1);
        this.mSoundPool.setOnLoadCompleteListener(new SoundPool.OnLoadCompleteListener() {
            @Override
            public void onLoadComplete(SoundPool soundPool, int sampleId, int status) {
                playSound();
            }
        });

    }
    
    /**
     * 播放音頻，但是當(dāng)前有音頻這正播放中時(shí)不響應(yīng)該次音頻播放
     * @param resId 本地音頻資源
     */
    public synchronized void playSoundUnfinished(int resId) {
        if ( isFmActive()) return;
        this.mResId = resId;
        this.mSoundId = this.mSoundPool.load(this.mainContext, this.mResId, 1);
        mSoundPool.setOnLoadCompleteListener(new SoundPool.OnLoadCompleteListener() {
            @Override
            public void onLoadComplete(SoundPool soundPool, int sampleId, int status) {
                playSound();
            }
        });
    }

    /**
     * 播放音頻文件
     */
    private void playSound() {
        mSoundPool.play(this.mSoundId, 1.0f, 1.0f, 0, 0, 1f);
    }

    /**
     * 判斷當(dāng)前設(shè)備是否正在播放音頻
     */
    private boolean isFmActive() {
        if (mAudioManager == null) {
            return false;
        }
        return mAudioManager.isMusicActive();
    }
}