使用Camera 2 API Android降低图像分辨率

Question

嗨，我在Android中使用Camera 2 API，图像分辨率/图像质量降低了。

无法确定哪个部分正在执行该操作。

在cutImage方法中，我基于矩形叠加层切割部分图像。也会影响分辨率吗？

关于可以对此代码执行什么操作的任何建议，都不会降低图像质量。附件是叠加图像。

private void usePicture() {
    Log.d(TAG, "usePicture - started     ");

    if(null != takenPictureBytes ){
        try{
            String imagePath = null;

            Bitmap bitmap = BitmapFactory.decodeByteArray(takenPictureBytes, 0, takenPictureBytes.length);
            int bitmapByteCountUsePic = byteSizeOf(bitmap);
            Matrix matrix = new Matrix();
            matrix.postRotate(90);
            Bitmap rotatedBitmap = Bitmap.createBitmap(bitmap, 0, 0, bitmap.getWidth(), bitmap.getHeight(), matrix, true);

            if (isFrameMode) {
                float withRatio = (float) rotatedBitmap.getWidth() / (float) textureViewWidth;
                float heightRatio = (float) rotatedBitmap.getHeight() / (float) textureViewHeight;

                Bitmap newImage = cutImage(rotatedBitmap, (int) (photoFrameView.getWidth() * withRatio), (int) (photoFrameView.getHeight() * heightRatio), withRatio);
                int bitmapByteCountNewImage = byteSizeOf(newImage);
                imagePath = saveBitmap(newImage);

            } else {
                imagePath = saveBitmap(rotatedBitmap);
            }
            TakePhotoFragment.TakePhotoFragmentEvent takePhotoFragmentEvent = new TakePhotoFragment.TakePhotoFragmentEvent();
            takePhotoFragmentEvent.setImagePath(imagePath);
            // send rxjava
            //pop backstack
            RxBus.getInstance().post(takePhotoFragmentEvent);
            getActivity().getSupportFragmentManager().popBackStack();
        }catch (Exception e){
            Log.d(TAG, "usePicture - exception     ");
            e.printStackTrace();
        }
    }else{
        Log.d(TAG, "usePicture - takenPictureBytes is null");
        DialogUtil.showErrorSnackBar(getView(), R.string.retake_photo );
    }
}

public Bitmap cutImage(final Bitmap bitmap, final int pixepWidth, final int pixelsHeight, float widthRatio) {
    int bitmapByteCountCutImage = byteSizeOf(bitmap);
    Bitmap output = createBitmap(pixepWidth, pixelsHeight, Bitmap.Config.ARGB_8888);
    Bitmap original = bitmap;

    final Paint paint = new Paint();
    Canvas canvas = new Canvas(output);
    int padding = (int) ((float) getResources().getDimensionPixelSize(R.dimen.double_padding) * widthRatio);

    Rect rect = new Rect(padding, (original.getHeight() - pixelsHeight) / 2, padding + pixepWidth, original.getHeight() - (original.getHeight() - pixelsHeight) / 2);

    final RectF cutedRect = new RectF(0, 0, pixepWidth, pixelsHeight);
    paint.setAntiAlias(true);
    canvas.drawARGB(0, 0, 0, 0);
    canvas.drawBitmap(original, rect, cutedRect, paint);
    return output;
}

    private String saveBitmap(Bitmap bitmap) {
    File pictureFileDir = getDir();

    if (!pictureFileDir.exists() && !pictureFileDir.mkdirs()) {
        Toast.makeText(getActivity(), "Can't create directory to save image.", Toast.LENGTH_LONG).show();
        return null;

    }

    SimpleDateFormat dateFormat = new SimpleDateFormat("yyyymmddhhmmssSSS");
    String date = dateFormat.format(new Date());
    String photoFile = "Picture_" + date + ".jpg";

    String filename = pictureFileDir.getPath() + File.separator + photoFile;

    File pictureFile = new File(filename);

    try {
        ByteArrayOutputStream stream = new ByteArrayOutputStream();
        bitmap.compress(Bitmap.CompressFormat.JPEG, 100, stream);

        FileOutputStream fos = new FileOutputStream(pictureFile);
        fos.write(stream.toByteArray());
        fos.close();

        return pictureFile.getAbsolutePath();

    } catch (Exception error) {
        Log.d(TAG, "File" + filename + "not saved: " + error.getMessage());
    }

    return null;
}