Android -- AudioPlayer
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<String> 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
本文转自我爱物联网博客园博客，原文链接：http://www.cnblogs.com/yydcdut/p/4725728.html，如需转载请自行联系原作者
