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;@Overrideprotected 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);}@Overridepublic 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();}}@Overridepublic void onCompletion(MediaPlayer mp) {mMediaPlayer.reset();}@Overrideprotected void onDestroy() {super.onDestroy();mMediaPlayer.release();}

public class SoundAdapter extends BaseAdapter {private Context mContext;private File mDir;private int mTotalNumber = 0;private List<String> mFileNameList;public SoundAdapter(Context context, String dirPath) {mContext = context;mDir = new File(dirPath);mTotalNumber = mDir.list().length;mFileNameList = Arrays.asList(mDir.list());}@Overridepublic int getCount() {return mTotalNumber;}@Overridepublic Object getItem(int position) {return mFileNameList.get(position);}@Overridepublic long getItemId(int position) {return position;}@Overridepublic 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;}@Overridepublic void notifyDataSetChanged() {mTotalNumber = mDir.list().length;mFileNameList = Arrays.asList(mDir.list());super.notifyDataSetChanged();}
}

截图

我是天王盖地虎的分割线