Android : Android Camera- scaling

I want create some android camera app and I have some trouble with scaling pictures. I'm using this code

private Size getOptimalPreviewSize(List<Size> sizes, int w, int h) {
    final double ASPECT_TOLERANCE = 0.05;
    double targetRatio = (double) w/h;
    if (sizes==null) return null;

    Size optimalSize = null;

    double minDiff = Double.MAX_VALUE;

    int targetHeight = h;

    // Find size
    for (Size size : sizes) {
        double ratio = (double) size.width / size.height;
        if (Math.abs(ratio - targetRatio) > ASPECT_TOLERANCE) continue;
        if (Math.abs(size.height - targetHeight) < minDiff) {
            optimalSize = size;
            minDiff = Math.abs(size.height - targetHeight);
        }
    }

    if (optimalSize == null) {
        minDiff = Double.MAX_VALUE;
        for (Size size : sizes) {
            if (Math.abs(size.height - targetHeight) < minDiff) {
                optimalSize = size;
                minDiff = Math.abs(size.height - targetHeight);
            }
        }
    }
    return optimalSize;
}

to set

 List<Size> sizes = mParameters.getSupportedPreviewSizes();
    optimalSize = getOptimalPreviewSize(sizes, getResources().getDisplayMetrics().heightPixels,
            getResources().getDisplayMetrics().widthPixels);
    mParameters.setPreviewSize(optimalSize.width, optimalSize.height);

but i have trouble, because when I try display this picture from camera quickly in ImageView it's non scalled. How could i cut and save this picture to display in preview scale without rotating? So i need cut picture with this scale to phone size.