SurfaceView+Camera+OpenCv自定义相机保存图片

至于如何在项目中如何添加OpenCv的SDK在此不再赘述：我引入的OpenCv-SDK版本为OpenCV-3.1.0-android-sdk在Activity中实现CameraBridgeViewBase.CvCameraViewListener2接口并重写其方法,在

Mat onCameraFrame(CameraBridgeViewBase.CvCameraViewFrame inputFrame)方法中可以使用OpenCv的保存图片的方法，如下：

Imgcodecs.imwrite("/storage/emulated/0/" + "OpenCvimwrite.jpg", inputFrame.rgba());

方法参数为：1.图片名称（包括路径）2.Mat类型的数据注：此方法保存的图片分辨率和预览分辨率相同（即Camera的PreviewSize属性）另外此图片可能比较模糊，通过查看JavaCameraView类中的Boolean initializeCamera(int width,int height)方法发现有以下两行代码：

 int size = mFrameWidth * mFrameHeight;size  = size * ImageFormat.getBitsPerPixel(params.getPreviewFormat()) / 8;

将size改为

 size = size * ImageFormat.getBitsPerPixel(params.getPreviewFormat());

照片的效果会稍微好一点。下面切入主题，添加保存照片的方法：在JavaCameraView类中添加方法：

public void tackPhoto(final String name) {
if (mCamera != null) {
mCamera.takePicture(null, null, new Camera.PictureCallback() {
@Override
public void onPictureTaken(byte[] data, Camera camera) {
Bitmap bmp = BitmapFactory.decodeByteArray(data, 0, data.length);
saveMyBitmap(bmp, name);
}
});
}

 public void saveMyBitmap(Bitmap mBitmap, String photoName) {if (isMediaMounted()) {String SDCardPath = Environment.getExternalStorageDirectory().getAbsolutePath().toString();createFileDir(SDCardPath + File.separator + "OpenCv");String FilePath = SDCardPath + File.separator + "OpenCv" + File.separator + photoName + ".jpg";File file = new File(FilePath);//  "/storage/emulated/0/OpenCv" + "OpenCv.jpg",BufferedOutputStream bos = null;try {FileOutputStream fos = new FileOutputStream(file);bos = new BufferedOutputStream(fos);mBitmap.compress(Bitmap.CompressFormat.JPEG, 100, bos);bos.flush();} catch (Exception e) {e.printStackTrace();} finally {try {if (mBitmap != null) {mBitmap.recycle();}bos.close();} catch (IOException e) {e.printStackTrace();}}} else {Log.e(TAG, "saveMyBitmap: 没有挂载内存卡，无法保存图片");}}

/**
* SD卡是否挂载
*
* @return
*/
public static boolean isMediaMounted() {
String status = Environment.getExternalStorageState();
if (status.equals(Environment.MEDIA_MOUNTED)) {
return true;
} else {
return false;
}
}

这样在Activity中就可以调用JavaCameraView的tackPhoto()方法拍照了。