# Android 拍摄录制

Android 移动开发拍摄照片录制视频页面分两大块如果业务不是很复杂对拍摄录制要求没有定制化 ps： 4：3 16：9 照片质量 720P 1080P 不需要实现自己的拍照逻辑只要借助 Android 原生的相机实现拍照录像即可如果实现定制化开发 ps：照片尺寸质量连拍？等则需要自行开发

# 申请必要的权限

Android 6.0以上相机权限录制权限需要自行申请这里不再讲明方法

  <uses-feature android:name="android.hardware.camera" />

  <uses-feature android:name="android.hardware.camera.autofocus" />

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

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

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

# 调用系统相机->拍摄照片

   try {
                //检测相机 权限
                CameraPermissionsUtils.checkCameraPermissions();
                //设置拍摄照片保存位置
                File file = getStorgeFile();
                imgSavePath = file.getPath();
            
                Intent intentFromCapture = new Intent(
                        MediaStore.ACTION_IMAGE_CAPTURE);

                 //添加这一句表示对目标应用临时授权该Uri所代表的文件
                intentFromCapture.addFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION);
              
                intentFromCapture.putExtra(MediaStore.EXTRA_OUTPUT,getUriForFile(getActivity(), file));
                startActivityForResult(intentFromCapture,
                        FLAG_CAMERA);
       } catch (Exception e) {
          ToastUtils.shortToastMessage(BaseApplication.getContext(), "请检查下您是否禁用了照相权限!");
          //执行申请 权限 代码 ...
       }

    @Override
    public void onActivityResult(int requestCode, int resultCode, Intent data) {
        super.onActivityResult(requestCode, resultCode, data);
        if (resultCode == RESULT_OK) {
            switch (requestCode) {
                //相机拍摄
                case FLAG_CAMERA:
                    File file = new File(imgSavePath);
                    //裁剪 拍摄的照片
                    cropImageUri(getUriForFile(getActivity(), file), 800, 800, FLAG_CLIP, FLAG_CAMERA);
                    break;
            }
        }
    }

# 调用系统相机->录制视频

static final int REQUEST_VIDEO_CAPTURE = 1;

private void dispatchTakeVideoIntent() {
    Intent takeVideoIntent = new Intent(MediaStore.ACTION_VIDEO_CAPTURE);
    if (takeVideoIntent.resolveActivity(getPackageManager()) != null) {
        startActivityForResult(takeVideoIntent, REQUEST_VIDEO_CAPTURE);
    }
}

@Override
protected void onActivityResult(int requestCode, int resultCode, Intent intent) {
    if (requestCode == REQUEST_VIDEO_CAPTURE && resultCode == RESULT_OK) {
        Uri videoUri = intent.getData();
        videoView.setVideoURI(videoUri);
    }
}

# 自定义拍摄录制

设置Camera 参数
初始化 SurfaceView
MediaRecorder 参数设置

# 拍摄录制流程图

camera_flow.png

# 设置相机参数

预览比例保存比例本机是否支持该比例？
举个栗子：预览图片希望是4：3 拍照保存也是4：3 手机的屏幕却是 16：9 或者 18：9
如何设置？

按屏幕宽设置预览View的高
按照比例设置预览View的宽高 screenHeight = screenWith/3*4

按照预览的比例去轮询相机支持的参数设置宽高比

  /**
   * doStartPreview
   * @param holder
   * @param screenProp H/W
   */
  public void doStartPreview(SurfaceHolder holder, float screenProp) {
      if (isPreviewing) {
          LogUtil.i("doStartPreview isPreviewing");
      }
      if (this.screenProp < 0) {
          this.screenProp = screenProp;
      }
      if (holder == null) {
          return;
      }
      this.mHolder = holder;
      if (mCamera != null) {
          try {
              mParams = mCamera.getParameters();

              mParams.setFlashMode(Camera.Parameters.FLASH_MODE_OFF);
              //闪关灯配置
              //自动模式，当光线较暗时自动打开闪光灯；
              mParams.setFlashMode(Camera.Parameters.FLASH_MODE_AUTO);
              //对焦模式
              //自动模式
              mParams.setFocusMode(Camera.Parameters.FOCUS_MODE_MACRO);

            
              mParams = mCamera.getParameters();
              Camera.Size previewSize = CameraParamUtil.getInstance().getPreviewSize(mParams
                      .getSupportedPreviewSizes(), DisplayUtils.getScreenMetrics(BaseApp.getContext()).x, screenProp);
              Camera.Size pictureSize = CameraParamUtil.getInstance().getPictureSize(mParams
                      .getSupportedPictureSizes(), DisplayUtils.getScreenMetrics(BaseApp.getContext()).x, screenProp);
              mParams.setPreviewSize(previewSize.width, previewSize.height);
              preview_width = previewSize.width;
              preview_height = previewSize.height;
              mParams.setPictureSize(pictureSize.width, pictureSize.height);

              //设置聚焦方式
              if (CameraParamUtil.getInstance().isSupportedFocusMode(
                      mParams.getSupportedFocusModes(), android.hardware.Camera.Parameters.FOCUS_MODE_CONTINUOUS_PICTURE)) {
                  mParams.setFocusMode(android.hardware.Camera.Parameters.FOCUS_MODE_CONTINUOUS_PICTURE);
              }
              // 设置图片保存
              if (CameraParamUtil.getInstance().isSupportedPictureFormats(mParams.getSupportedPictureFormats(),
                      ImageFormat.JPEG)) {
                  mParams.setPictureFormat(ImageFormat.JPEG);
                  mParams.setJpegQuality(100);
              }

              mCamera.setParameters(mParams);
              mParams = mCamera.getParameters();
              mCamera.setPreviewDisplay(holder);  //SurfaceView
              mCamera.setDisplayOrientation(cameraAngle);//浏览角度
              mCamera.setPreviewCallback(this); //每一帧回调
              mCamera.startPreview();//启动浏览
              isPreviewing = true;
              Log.i(TAG, "=== Start Preview ===");
          } catch (Exception e) {
              e.printStackTrace();
          }
          }
      }

按照比例查询最优尺寸

   public Camera.Size getPreviewSize(List<Camera.Size> list, int th, float rate) {
      Collections.sort(list, sizeComparator);
      int i = 0;
      for (Camera.Size s : list) {
          if ((s.width > th) && equalRate(s, rate)) {
              Log.i(TAG, "MakeSure Preview :w = " + s.width + " h = " + s.height);
              break;
          }
          i++;
      }
      if (i == list.size()) {
          return getBestSize(list, rate);
      } else {
          return list.get(i);
      }
  }
  
  //排序
  private class CameraSizeComparator implements Comparator<Camera.Size> {
               public int compare(Camera.Size lhs, Camera.Size rhs) {
          if (lhs.width == rhs.width) {
              return 0;
          } else if (lhs.width > rhs.width) {
              return 1;
          } else {
              return -1;
          }
      }
  }

  //换算 比例差别 
  //如果差别 上下不超过 0.2 则为最佳尺寸 
  private boolean equalRate(Camera.Size s, float rate) {
          float r = (float) (s.width) / (float) (s.height);
          return Math.abs(r - rate) <= 0.2;
   }

# 拍照方法很简单这里不再描述

/**
 * Equivalent to <pre>takePicture(Shutter, raw, null, jpeg)</pre>.
 *
 * @see #takePicture(ShutterCallback, PictureCallback, PictureCallback, PictureCallback)
 */
public final void takePicture(ShutterCallback shutter, PictureCallback raw,
        PictureCallback jpeg) {
    takePicture(shutter, raw, null, jpeg);
}

# 录制

# 设置录制参数：

//启动录像
public void startRecord(Surface surface, float screenProp, ErrorCallback callback) {
    mCamera.setPreviewCallback(null);
    final int nowAngle = (angle + 90) % 360;
    //获取第一帧图片
    Camera.Parameters parameters = mCamera.getParameters();
    int width = parameters.getPreviewSize().width;
    int height = parameters.getPreviewSize().height;
    YuvImage yuv = new YuvImage(firstFrame_data, parameters.getPreviewFormat(), width, height, null);
    ByteArrayOutputStream out = new ByteArrayOutputStream();
    yuv.compressToJpeg(new Rect(0, 0, width, height), 50, out);
    byte[] bytes = out.toByteArray();
    videoFirstFrame = BitmapFactory.decodeByteArray(bytes, 0, bytes.length);
    Matrix matrix = new Matrix();
    if (SELECTED_CAMERA == CAMERA_POST_POSITION) {
        matrix.setRotate(nowAngle);
    } else if (SELECTED_CAMERA == CAMERA_FRONT_POSITION) {
        matrix.setRotate(270);
    }
    videoFirstFrame = createBitmap(videoFirstFrame, 0, 0, videoFirstFrame.getWidth(), videoFirstFrame
            .getHeight(), matrix, true);

    if (isRecorder) {
        return;
    }
    if (mCamera == null) {
        openCamera(SELECTED_CAMERA);
    }
    if (mediaRecorder == null) {
        mediaRecorder = new MediaRecorder();
    }
    if (mParams == null) {
        mParams = mCamera.getParameters();
    }
    List<String> focusModes = mParams.getSupportedFocusModes();
    if (focusModes.contains(Camera.Parameters.FOCUS_MODE_CONTINUOUS_VIDEO)) {
        mParams.setFocusMode(Camera.Parameters.FOCUS_MODE_CONTINUOUS_VIDEO);
    }
    mCamera.setParameters(mParams);
    mCamera.unlock();
    mediaRecorder.reset();
    mediaRecorder.setCamera(mCamera);
    mediaRecorder.setVideoSource(MediaRecorder.VideoSource.CAMERA); //视频采集来源

    mediaRecorder.setAudioSource(MediaRecorder.AudioSource.MIC);

    mediaRecorder.setOutputFormat(MediaRecorder.OutputFormat.MPEG_4); //输出格式
    mediaRecorder.setVideoEncoder(MediaRecorder.VideoEncoder.H264); //编码格式
    mediaRecorder.setAudioEncoder(MediaRecorder.AudioEncoder.AAC); //音频模式

    //设置视频输出 尺寸比例
    Camera.Size videoSize;
    if (mParams.getSupportedVideoSizes() == null) {
        videoSize = CameraParamUtil.getInstance().getPreviewSize(mParams.getSupportedPreviewSizes(),
                DisplayUtils.getScreenMetrics(BaseApp.getContext()).x, screenProp);
    } else {
        //            videoSize = CameraParamUtil.getInstance().getPreviewSize(mParams.getSupportedVideoSizes(), 600,
        //                    screenProp);
        videoSize = CamParaUtil.getInstance().getOptimalSize(mParams.getSupportedVideoSizes(),
                DisplayUtils.getScreenMetrics(BaseApp.getContext()).x, DisplayUtils.getScreenMetrics(BaseApp.getContext()).y);
    }
    Log.i(TAG, "setVideoSize    width = " + videoSize.width + "height = " + videoSize.height);
    if (videoSize.width == videoSize.height) {
        mediaRecorder.setVideoSize(preview_width, preview_height);
    } else {
        mediaRecorder.setVideoSize(videoSize.width, videoSize.height);
    }

    //        if (SELECTED_CAMERA == CAMERA_FRONT_POSITION) {
    //            mediaRecorder.setOrientationHint(270);
    //        } else {
    //            mediaRecorder.setOrientationHint(nowAngle);
    ////            mediaRecorder.setOrientationHint(90);
    //        }
    if (SELECTED_CAMERA == CAMERA_FRONT_POSITION) {
        //手机预览倒立的处理
        if (cameraAngle == 270) {
            //横屏
            if (nowAngle == 0) {
                mediaRecorder.setOrientationHint(180);
            } else if (nowAngle == 270) {
                mediaRecorder.setOrientationHint(270);
            } else {
                mediaRecorder.setOrientationHint(90);
            }
        } else {
            if (nowAngle == 90) {
                mediaRecorder.setOrientationHint(270);
            } else if (nowAngle == 270) {
                mediaRecorder.setOrientationHint(90);
            } else {
                mediaRecorder.setOrientationHint(nowAngle);
            }
        }
    } else {
        mediaRecorder.setOrientationHint(nowAngle);
    }


    //        if (DeviceUtil.isHuaWeiRongyao()) {
    //            mediaRecorder.setVideoEncodingBitRate(4 * 100000);
    //        } else {
    //            mediaRecorder.setVideoEncodingBitRate(mediaQuality);
    //        }
    
    //设置帧率
    mediaRecorder.setVideoFrameRate(24);
    //设置比特率
    mediaRecorder.setVideoEncodingBitRate(mediaQuality);
    mediaRecorder.setPreviewDisplay(surface);
    
    //文件保存文位置 设置
    videoFileName = "video_" + System.currentTimeMillis() + ".mp4";
    if (saveVideoPath.equals("")) {
        saveVideoPath = Environment.getExternalStorageDirectory().getPath();
    }
    //        videoFileAbsPath = saveVideoPath + File.separator + videoFileName;
    videoFileAbsPath = FileUtil.initPath() + videoFileName;
    mediaRecorder.setOutputFile(videoFileAbsPath);

    try {
        mediaRecorder.prepare();
        mediaRecorder.start();
        isRecorder = true;
    } catch (IllegalStateException e) {
        e.printStackTrace();
        Log.i("CJT", "startRecord IllegalStateException");
        if (this.errorLisenter != null) {
            this.errorLisenter.onError();
        }
    } catch (IOException e) {
        e.printStackTrace();
        Log.i("CJT", "startRecord IOException");
        if (this.errorLisenter != null) {
            this.errorLisenter.onError();
        }
    } catch (RuntimeException e) {
        Log.i("CJT", "startRecord RuntimeException");
    }
}

 //停止录像
public void stopRecord(boolean isShort, StopRecordCallback callback) {
    if (!isRecorder) {
        return;
    }
    if (mediaRecorder != null) {
        mediaRecorder.setOnErrorListener(null);
        mediaRecorder.setOnInfoListener(null);
        mediaRecorder.setPreviewDisplay(null);
        try {
            mediaRecorder.stop();
        } catch (RuntimeException e) {
            e.printStackTrace();
            mediaRecorder = null;
            mediaRecorder = new MediaRecorder();
        } finally {
            if (mediaRecorder != null) {
                mediaRecorder.release();
            }
            mediaRecorder = null;
            isRecorder = false;
        }
        if (isShort) {
            if (FileUtil.deleteFile(videoFileAbsPath)) {
                callback.recordResult(null, null);
            }
            return;
        }
        doStopPreview();
        String fileName = FileUtil.initPath() + videoFileName;
        callback.recordResult(fileName, videoFirstFrame);
    }
}

# surfceView 设置

mSurfaceView = (SurfaceView) findViewById(R.id.surface_view);
mHolder = mSurfaceView.getHolder();
mHolder.setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS);
mHolder.addCallback(this);

@Override
public void surfaceCreated(SurfaceHolder holder) {
    //开启相机
    new Thread() {
        @Override
        public void run() {
            CameraInterface.getInstance().doOpenCamera(CameraShootActivity.this);
        }
    }.start();
}

@Override
public void surfaceChanged(SurfaceHolder holder, int format, int width, int height) {
}

@Override
public void surfaceDestroyed(SurfaceHolder holder) {
    //释放相机
    LogUtil.i("JCameraView SurfaceDestroyed");
    CameraInterface.getInstance().doDestroyCamera();
}

# Activity 生命周期

@Override
protected void onResume() {
    super.onResume();
    CameraInterface.getInstance().registerSensorManager(this);
    if (screenProp > 1.4) {
        isSwitchRecording = true;
        CameraInterface.getInstance().doStopPreview();
        //如果当前屏占比 大于1.8 不是 16：9 采用 16:9设置 小于16:9 采用原先屏占比
        CameraInterface.getInstance().doStartPreview(mSurfaceView.getHolder(), DisplayUtils.getScreenRate(this) > 1.8
                ? 16f / 9f : DisplayUtils.getScreenRate(this));
        screenProp = DisplayUtils.getScreenRate(this) > 1.8
                ? 16f / 9f : DisplayUtils.getScreenRate(this);
        measureVideoSize();
    } else {
        isSwitchRecording = false;
        CameraInterface.getInstance().doStopPreview();
        screenProp = 4f / 3f;
        CameraInterface.getInstance().doStartPreview(mSurfaceView.getHolder(), 4f / 3f);
        measureCameraSize();
    }
}

 @Override
protected void onPause() {
    super.onPause();
    CameraInterface.getInstance().isPreview(false);
    CameraInterface.getInstance().unregisterSensorManager(this);
    CameraInterface.getInstance().doStopPreview();
}

Android 拍摄 录制

# Android 拍摄 录制

# 申请必要的权限

# 调用系统相机->拍摄照片

# 调用系统相机->录制视频

# 自定义拍摄 录制

# 拍摄 录制流程图

# 设置相机参数

# 拍照方法 很简单这里不再描述

# 录制

# 设置录制参数：

# surfceView 设置

# Activity 生命周期

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Android 拍摄录制

# Android 拍摄录制

# 自定义拍摄录制

# 拍摄录制流程图

# 拍照方法很简单这里不再描述