Android 如何调整相机图片的大小并将其保存为位图以在活动内的固定矩形区域中显示

我有一个可以拍摄项目照片的应用程序，并且这些项目必须在 ActivityScreen 上的某个固定区域中可见。问题是活动中显示的来自保存的位图的图片与我预览和拍摄的图片完全不同。它看起来放大了，并显示了我拍照时在预览中没有看到的区域：这是关键代码行

图像捕捉:

surfHolder.setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS);

captImageView = (ImageView)findViewById(R.id.CamImageView);

byte [] photoData;
Camera cam;
SurfaceHolder surfHolder;
SurfaceView surfView;


Camera.PictureCallback cback;

cback = new Camera.PictureCallback() {

        @Override
        public void onPictureTaken(byte[] data, Camera camera) {

                        final int length = data.length;
                opts.inSampleSize = 4;
            final BitmapFactory.Options opts = new BitmapFactory.Options();    
            Bitmap bMap = null;

            try {

                    bMap = BitmapFactory.decodeByteArray(data, 0, length, opts);

            } catch(Exception e) {

            }catch(OutOfMemoryError e) {

            } 

            captImageView.setImageBitmap(bitmap);

            if(bMap==null) {
               cam.startPreview();
            } else {
                             savePhotoButton.setVisibility(ImageView.VISIBLE);
                 takePhotoButton.setVisibility(ImageView.INVISIBLE);
                 photoData = data;
            }
        }
 }

图像保存:

captImageView.setImageBitmap(null);
// SAVE THE PICTURE   THIS SAVES PICTURE IN WRONG SIZE.  LOOKS LIKED ZOOMED IN NOT WHAT WAS PREVIEWED!!!


           public void photoSave(byte[] data) {

               final int length = data.length;
           final BitmapFactory.Options options = new BitmapFactory.Options();
        options.inSampleSize = 2;

                try {
        Bitmap bMap = BitmapFactory.decodeByteArray(data, 0, length, options);
         int quality = 75;
             File file = new File(getDir(), fname);
         fileOutputStream = new FileOutputStream(file);
         bMap.compress(CompressFormat.JPEG, quality, fileOutputStream);
        }catch(FileNotFoundException e) {

        }  catch(OutOfMemoryError e) {} }

图像显示为可在活动中绘制 不起作用，无法显示缩放后的图像或拍摄照片时在预览中根本看不到的部分！

BitmapFactory.Options options = new BitmapFactory.Options();
options.inSampleSize = inSampSize;
Bitmap bitmap = BitmapFactory.decodeFile(path, options);

Drawable drawable = bitmap;
ImageView pictureView = (ImageView)findViewById(R.id.pictureViewer);
pictureView.setImageDrawable(drawable);