AudioPlayer

主要是实现边录边播（AudioRecord+AudioTrack）以及对音频的实时处理（如会说话的汤姆猫、语音）

优点：语音的实时处理，可以用代码实现各种音频的封装

缺点：输出是PCM语音数据，如果保存成音频文件，是不能够被播放器播放的，所以必须先写代码实现数据编码以及压缩

示例：

使用AudioRecord类录音，并实现WAV格式封装。录音20s，输出的音频文件大概为3.5M左右（已写测试代码）

Demo

public class SoundActivity extends Activity implements  AdapterView.OnItemClickListener        , MediaPlayer.OnCompletionListener {  public static final String DIR = Environment.getExternalStorageDirectory().getAbsolutePath() + File.separator + "1122" + File.separator;  private ListView mListView;  private SoundAdapter mAdapter;  private MediaPlayer mMediaPlayer;    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_sound);        mListView = (ListView) findViewById(R.id.lv_sound);        mListView.setOnItemClickListener(this);        initListView();        initMediaPlayer();    }    private void initMediaPlayer() {        mMediaPlayer = new MediaPlayer();        mMediaPlayer.setOnCompletionListener(this);    }    private void initListView() {        mAdapter = new SoundAdapter(SoundActivity.this, DIR);        mListView.setAdapter(mAdapter);    }    @Override    public void onItemClick(AdapterView
     parent, View view, int position, long id) {        String fileName = (String) mAdapter.getItem(position);        String file = DIR + fileName;        try {            if (mMediaPlayer.isPlaying()) {                mMediaPlayer.stop();            }            try {                Thread.sleep(500);            } catch (InterruptedException e) {                e.printStackTrace();            }            mMediaPlayer.reset();            mMediaPlayer.setDataSource(file);            mMediaPlayer.prepare();            mMediaPlayer.start();        } catch (IOException e) {            e.printStackTrace();        }    }    @Override    public void onCompletion(MediaPlayer mp) {        mMediaPlayer.reset();    }    @Override    protected void onDestroy() {        super.onDestroy();        mMediaPlayer.release();    }

public class SoundAdapter extends BaseAdapter {    private Context mContext;    private File mDir;    private int mTotalNumber = 0;    private List
    
      mFileNameList;    public SoundAdapter(Context context, String dirPath) {        mContext = context;        mDir = new File(dirPath);        mTotalNumber = mDir.list().length;        mFileNameList = Arrays.asList(mDir.list());    }    @Override    public int getCount() {        return mTotalNumber;    }    @Override    public Object getItem(int position) {        return mFileNameList.get(position);    }    @Override    public long getItemId(int position) {        return position;    }    @Override    public View getView(int position, View convertView, ViewGroup parent) {        ViewHolder vh;        if (convertView == null) {            vh = new ViewHolder();            convertView = LayoutInflater.from(mContext).inflate(R.layout.item, null);            vh.textView = (TextView) convertView.findViewById(R.id.text_view);            convertView.setTag(vh);        } else {            vh = (ViewHolder) convertView.getTag();        }        vh.textView.setText(mFileNameList.get(position));        return convertView;    }    class ViewHolder {        TextView textView;    }    @Override    public void notifyDataSetChanged() {        mTotalNumber = mDir.list().length;        mFileNameList = Arrays.asList(mDir.list());        super.notifyDataSetChanged();    }}
    

截图

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