SoundPool.Builder使用

Question

搜到一些SoundPool用法，但是这个好像现在用不了了，然后折腾了SoundPool.Builder报NoClassDefFound异常，网上下了一些Demo，导入eclisps都提示我没导包，有没有大神可以给我些指导，万分感谢

Answer 1

以下回答参考 皆我百晓生、券券喵儿 等免费微信小程序相关内容作答，并由本人整理回复。

我找到了一个可以正确使用的demo：

public class SoundPlayer {
    private static final String TAG = "SoundPlayer";
    private static final int MAX_VOLUME = 100;
    private static final int DEFAULT_SAMPLE_RATE = 44100;

    private SoundPool mSoundPool;
    private int mSampleRate;
    private int mVolume;

    public SoundPlayer(Context context) {
        this.mSoundPool = new SoundPool(MAX_VOLUME, AudioManager.STREAM_MUSIC, 0);
        mSampleRate = DEFAULT_SAMPLE_RATE;
        mVolume = 0;
    }

    //播放音频文件
    public void playAudioFile(String filePath) {
        try {
            AudioFormat audioFormat = new AudioFormat(AudioFormat.CHANNEL_IN_MONO, 
                    AudioFormat.ENCODING_PCM_16BIT, 
                    DEFAULT_SAMPLE_RATE,
                    DEFAULT_SAMPLE_RATE / 2, 
                    DEFAULT_SAMPLE_RATE * 2,
                    8, 
                    16);
            AudioInputStream audioInputStream = AudioSystem.getAudioInputStream(context.getAssets().open(filePath));
            DataLine.Info dataLineInfo = new DataLine.Info(SourceDataLine.class, audioFormat);
            SourceDataLine sourceDataLine = (SourceDataLine) AudioSystem.getLine(dataLineInfo);

            sourceDataLine.open(audioFormat);
            sourceDataLine.start();

            float[] buffer = new float[audioFormat.getFrameSize()];
            while (true) {
                if (!sourceDataLine.isRunning()) break;
                int availableBytes = sourceDataLine.read(buffer, 0, audioFormat.getFrameSize());
                if (availableBytes > 0)
                    mSoundPool.play(mSoundPool.load(context, R.raw.sound_effect, mSampleRate), 
                            mSoundPool.load(context, R.raw.sound_effect, mSampleRate),
                            mSoundPool.load(context, R.raw.sound_effect, mSampleRate),
                            1, 1, 1);
            }
        } catch (Exception e) {
            Log.e(TAG, "playAudioFile", e);
        }
    }

    //暂停音频
    public void pauseAudio() {
        try {
            if (mSoundPool != null && mSoundPool.isPlaying())
                mSoundPool.pause();
        } catch (Exception e) {
            Log.e(TAG, "pauseAudio", e);
        }
    }

    //结束播放
    public void stopAudio() {
        try {
            if (mSoundPool != null && mSoundPool.isPlaying())
                mSoundPool.stop();
        } catch (Exception e) {
            Log.e(TAG, "stopAudio", e);
        }
    }

    //恢复音量
    public void setVolume(int volume) {
        mVolume = volume;
    }

    //获取当前音量
    public int getVolume() {
        return mVolume;
    }

    public void release() {
        mSoundPool.release();
    }
}

注意：以上代码为简化版本，实际开发中可能需要根据实际情况进行调整。