Android使用MediaRecorder实现录音及播放

2019-11-09 15:20:50

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现在项目中有使用到音视频相关技术，在参考了网上各种大牛的资料及根据自己项目实际情况（兼容安卓6.0以上版本动态权限管理等），把声音录制及播放相关代码做个记录。public class MediaRecorderActivity extends BaseActivity { PRivate Button start_tv; private ListView listView; //线程操作 private ExecutorService mExecutorService; //录音API private MediaRecorder mMediaRecorder; //录音开始时间与结束时间 private long startTime, endTime; //录音所保存的文件 private File mAudioFile; //文件列表数据 private List<FileBean> dataList; //录音文件数据列表适配器 private AudioAdapter mAudioAdapter; //录音文件保存位置 private String mFilePath = Environment.getExternalStorageDirectory().getAbsolutePath() + "/audio/"; //当前是否正在播放 private volatile boolean isPlaying; //播放音频文件API private MediaPlayer mediaPlayer; //使用Handler更新UI线程 private Handler mHandler = new Handler() { @Override public void handleMessage(Message msg) { super.handleMessage(msg); switch (msg.what) { case Constant.RECORD_SUCCESS: //录音成功，展示数据 if (null == mAudioAdapter) { mAudioAdapter = new AudioAdapter(MediaRecorderActivity.this, dataList, R.layout.file_item_layout); } listView.setAdapter(mAudioAdapter); break; //录音失败 case Constant.RECORD_FAIL: showToastMsg(getString(R.string.record_fail)); break; //录音时间太短 case Constant.RECORD_TOO_SHORT: showToastMsg(getString(R.string.time_too_short)); break; case Constant.PLAY_COMPLETION: showToastMsg(getString(R.string.play_over)); break; case Constant.PLAY_ERROR: showToastMsg(getString(R.string.play_error)); break; } } }; @Override protected void setWindowView() { setContentView(R.layout.activity_record); //录音及播放要使用单线程操作 mExecutorService = Executors.newSingleThreadExecutor(); dataList = new ArrayList<>(); } @Override protected void initViews() { this.start_tv = (Button) findViewById(R.id.start_tv); this.listView = (ListView) findViewById(R.id.listview); } @Override protected void initEvents() { //类似微信等应用按住说话进行录音，所以用OnTouch事件 this.start_tv.setOnTouchListener(new View.OnTouchListener() { @Override public boolean onTouch(View view, MotionEvent motionEvent) { switch (motionEvent.getAction()) { //按下操作 case MotionEvent.ACTION_DOWN: //安卓6.0以上录音相应权限处理 if (Build.VERSION.SDK_INT > 22) { permissionForM(); } else { startRecord(); } break; //松开操作 case MotionEvent.ACTION_CANCEL: case MotionEvent.ACTION_UP: stopRecord(); break; } //对OnTouch事件做了处理，返回true return true; } }); //点击播放对应的录音文件 this.listView.setOnItemClickListener(new AdapterView.OnItemClickListener() { @Override public void onItemClick(AdapterView<?> adapterView, View view, int i, long l) { //使用MediaPlayer播放声音文件 startPlay(dataList.get(i).getFile()); } }); } /** * @description 开始进行录音 * @author ldm * @time 2017/2/9 9:18 */ private void startRecord() { start_tv.setText(R.string.stop_by_up); start_tv.setBackgroundResource(R.drawable.bg_gray_round); //异步任务执行录音操作 mExecutorService.submit(new Runnable() { @Override public void run() { //播放前释放资源 releaseRecorder(); //执行录音操作 recordOperation(); } }); } /** * @description 录音失败处理 * @author ldm * @time 2017/2/9 9:35 */ private void recordFail() { mAudioFile = null; mHandler.sendEmptyMessage(Constant.RECORD_FAIL); } /** * @description 录音操作 * @author ldm * @time 2017/2/9 9:34 */ private void recordOperation() { //创建MediaRecorder对象 mMediaRecorder = new MediaRecorder(); //创建录音文件,.m4a为MPEG-4音频标准的文件的扩展名 mAudioFile = new File(mFilePath + System.currentTimeMillis() + ".m4a"); //创建父文件夹 mAudioFile.getParentFile().mkdirs(); try { //创建文件 mAudioFile.createNewFile(); //配置mMediaRecorder相应参数 //从麦克风采集声音数据 mMediaRecorder.setAudioSource(MediaRecorder.AudioSource.MIC); //设置保存文件格式为MP4 mMediaRecorder.setOutputFormat(MediaRecorder.OutputFormat.MPEG_4); //设置采样频率,44100是所有安卓设备都支持的频率,频率越高，音质越好，当然文件越大 mMediaRecorder.setAudioSamplingRate(44100); //设置声音数据编码格式,音频通用格式是AAC mMediaRecorder.setAudioEncoder(MediaRecorder.AudioEncoder.AAC); //设置编码频率 mMediaRecorder.setAudioEncodingBitRate(96000); //设置录音保存的文件 mMediaRecorder.setOutputFile(mAudioFile.getAbsolutePath()); //开始录音 mMediaRecorder.prepare(); mMediaRecorder.start(); //记录开始录音时间 startTime = System.currentTimeMillis(); } catch (Exception e) { e.printStackTrace(); recordFail(); } } /** * @description 结束录音操作 * @author ldm * @time 2017/2/9 9:18 */ private void stopRecord() { start_tv.setText(R.string.speak_by_press); start_tv.setBackgroundResource(R.drawable.bg_white_round); //停止录音 mMediaRecorder.stop(); //记录停止时间 endTime = System.currentTimeMillis(); //录音时间处理，比如只有大于2秒的录音才算成功 int time = (int) ((endTime - startTime) / 1000); if (time >= 3) { //录音成功,添加数据 FileBean bean = new FileBean(); bean.setFile(mAudioFile); bean.setFileLength(time); dataList.add(bean); //录音成功,发Message mHandler.sendEmptyMessage(Constant.RECORD_SUCCESS); } else { mAudioFile = null; mHandler.sendEmptyMessage(Constant.RECORD_TOO_SHORT); } //录音完成释放资源 releaseRecorder(); } /** * @description 翻放录音相关资源 * @author ldm * @time 2017/2/9 9:33 */ private void releaseRecorder() { if (null != mMediaRecorder) { mMediaRecorder.release(); mMediaRecorder = null; } } @Override public void onClick(View view) { } @Override protected void onDestroy() { super.onDestroy(); //页面销毁，线程要关闭 mExecutorService.shutdownNow(); } /*******6.0以上版本手机权限处理***************************/ /** * @description 兼容手机6.0权限管理 * @author ldm * @time 2016/5/24 14:59 */ private void permissionForM() { if (ContextCompat.checkSelfPermission(this, Manifest.permission.RECORD_AUDIO) != PackageManager.PERMISSION_GRANTED || ContextCompat.checkSelfPermission(this, Manifest.permission.WRITE_EXTERNAL_STORAGE) != PackageManager.PERMISSION_GRANTED) { ActivityCompat.requestPermissions(this, new String[]{Manifest.permission.RECORD_AUDIO, Manifest.permission.WRITE_EXTERNAL_STORAGE}, Constant.PERMISSIONS_REQUEST_FOR_AUDIO); } else { startRecord(); } } @Override public void onRequestPermissionsResult(int requestCode, @NonNull String[] permissions, @NonNull int[] grantResults) { if (requestCode == Constant.PERMISSIONS_REQUEST_FOR_AUDIO) { if (grantResults[0] == PackageManager.PERMISSION_GRANTED) { startRecord(); } return; } super.onRequestPermissionsResult(requestCode, permissions, grantResults); } /** * @description 播放音频 * @author ldm * @time 2017/2/9 16:54 */ private void playAudio(final File mFile) { if (null != mFile && !isPlaying) { isPlaying = true; mExecutorService.submit(new Runnable() { @Override public void run() { startPlay(mFile); } }); } } /** * @description 开始播放音频文件 * @author ldm * @time 2017/2/9 16:56 */ private void startPlay(File mFile) { try { //初始化播放器 mediaPlayer = new MediaPlayer(); //设置播放音频数据文件 mediaPlayer.setDataSource(mFile.getAbsolutePath()); //设置播放监听事件 mediaPlayer.setOnCompletionListener(new MediaPlayer.OnCompletionListener() { @Override public void onCompletion(MediaPlayer mediaPlayer) { //播放完成 playEndOrFail(true); } }); //播放发生错误监听事件 mediaPlayer.setOnErrorListener(new MediaPlayer.OnErrorListener() { @Override public boolean onError(MediaPlayer mediaPlayer, int i, int i1) { playEndOrFail(false); return true; } }); //播放器音量配置 mediaPlayer.setVolume(1, 1); //是否循环播放 mediaPlayer.setLooping(false); //准备及播放 mediaPlayer.prepare(); mediaPlayer.start(); } catch (IOException e) { e.printStackTrace(); //播放失败正理 playEndOrFail(false); } } /** * @description 停止播放或播放失败处理 * @author ldm * @time 2017/2/9 16:58 */ private void playEndOrFail(boolean isEnd) { isPlaying = false; if (isEnd) { mHandler.sendEmptyMessage(Constant.PLAY_COMPLETION); } else { mHandler.sendEmptyMessage(Constant.PLAY_ERROR); } if (null != mediaPlayer) { mediaPlayer.setOnCompletionListener(null); mediaPlayer.setOnErrorListener(null); mediaPlayer.stop(); mediaPlayer.reset(); mediaPlayer.release(); mediaPlayer = null; } }}

页面布局

对应资源文件strings.xml：

<resources> <string name="app_name">mediarecorder</string> <string name="record_fail">录音失败</string> <string name="time_too_short">时间太短，请重新录音</string> <string name="play_over">播放完成</string> <string name="play_error">抱歉，播放发生异常</string> <string name="stop_by_up">松开停止录音</string> <string name="speak_by_press">按住说话</string> <string name="start_record">开始录音</string> <string name="stop_record">停止录音</string></resources>

录音相关权限：

<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>  <uses-permission android:name="android.permission.RECORD_AUDIO"/>

安卓录制播放音频：https://github.com/ldm520/Android_Media

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