MediaRecorder 调用前置摄像头录制视频崩溃

这里是我初始化MediaRecorder的代码

  mMediaRecorder = new MediaRecorder();
        mMediaRecorder.reset();
        mCamera.unlock();
        //创建录音文件
        String tmpDir = Environment.getExternalStorageDirectory().toString() + "/XZLFile/Media/";
        mRecorderFile = new File(tmpDir + "video.mp4");
        try {
            if (!mRecorderFile.getParentFile().exists()) mRecorderFile.getParentFile().mkdirs();
            mRecorderFile.createNewFile();
        } catch (IOException e) {
            e.printStackTrace();
        }
        mMediaRecorder.setCamera(mCamera);
        mMediaRecorder.setOrientationHint(90);
        //从麦克风采集
        mMediaRecorder.setAudioSource(MediaRecorder.AudioSource.MIC);
        mMediaRecorder.setVideoSource(MediaRecorder.VideoSource.CAMERA);
        CamcorderProfile mCamcorderProfile = CamcorderProfile.get(Camera.CameraInfo.CAMERA_FACING_BACK, CamcorderProfile.QUALITY_HIGH);
   
        mMediaRecorder.setProfile(mCamcorderProfile);
  
        //设置录制视频的大小，其实Camera也必须要和这个比例相同，此处为了简单不做处理
        mMediaRecorder.setVideoSize(mCamcorderProfile.videoFrameWidth, mCamcorderProfile.videoFrameHeight);
//        //提高帧频率，录像模糊，花屏，绿屏可写上调试
//        mMediaRecorder.setVideoEncodingBitRate(mCamcorderProfile.videoFrameWidth * mCamcorderProfile.videoFrameHeight * 24 * 16);
//        mMediaRecorder.setVideoFrameRate(24);
        //所有android系统都支持的适中采样的频率
        mMediaRecorder.setAudioSamplingRate(44100);
        //设置文件录音的位置
        mMediaRecorder.setOutputFile(mRecorderFile.getAbsolutePath());
        //开始录音
        try {
            mMediaRecorder.prepare();
            mMediaRecorder.start();
        } catch (IOException e) {
            e.printStackTrace();
        }

按照需求，录制视频需要直接打开前置摄像头录制，所以在打开Camera，姿势改变一下：

  public static Camera getCameraInstance() {
        Camera c = null;
        try {
            c = Camera.open(); // attempt to get a Camera instance
        } catch (Exception e) {
            // Camera is not available (in use or does not exist)
        }
        return c; // returns null if camera is unavailable
    }

改为:

  public static Camera getCameraInstance() {
        Camera c = null;
        try {
            c = Camera.open(Camera.CameraInfo.CAMERA_FACING_FRONT); // attempt to get a Camera instance
        } catch (Exception e) {
            // Camera is not available (in use or does not exist)
        }
        return c; // returns null if camera is unavailable
    }

结果运行后，点击按钮开始录制视频崩溃，网上说，与setVideoSize有关，注掉就可以了，但是并没用，想想应该还是初始化MediaRecorder的问题，最后发现：

    CamcorderProfile mCamcorderProfile = CamcorderProfile.get(Camera.CameraInfo.CAMERA_FACING_BACK, CamcorderProfile.QUALITY_HIGH);

改为：

 CamcorderProfile mCamcorderProfile = CamcorderProfile.get(Camera.CameraInfo.CAMERA_FACING_FRONT, CamcorderProfile.QUALITY_HIGH);

简单意思就是，调用前置摄像头，这里就要设置Camera.CameraInfo.CAMERA_FACING_FRONT，如果是后置摄像头，这里就设置Camera.CameraInfo.CAMERA_FACING_BACK。对应起来。
改完之后，重新build，OK。