How to post an android layout to facebook as photo

I have a RelativeLayout that I need to send to Facebook. So I figure the process involves

1. Inflate the RelativeLayout


2. Add content to each subview


3. Convert the RelativeLayout to a Bitmap


4. Compress the Bitmap


5. Send the Bitmap to Facebook

In the following code, I have followed that process. But I am already getting a Null Pointer Exception at the line map = Bitmap.createBitmap(v.getDrawingCache(true));. So instead of asking for help for each error I find along the way. I am posting my entire code for help. Perhaps some more experienced eyes can find some bugs with me.

Note: do not be distracted by the fact that the RelativeLayout only contains one ImageView; this is a test run.

public static void sendRelativeLayoutToFacebook(Activity activity, Bitmap testImg) {
        Log.i(TAG, "inside sendRelativeLayoutToFacebook");
        View v = prepareViewForFacebook(activity, testImg);
        Bitmap photo = getBitmapFromView(v);
        File filename = createCompressedImageFromBitmap(getContext(), photo);
        Request request;
        try {
            request = Request.newUploadPhotoRequest(Session.getActiveSession(), filename, new Request.Callback() {
                @Override
                public void onCompleted(Response response) {
                    // some logging goes here maybe             }
            });
            request.executeAsync();
        } catch (FileNotFoundException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }

    }

    static View prepareViewForFacebook(Activity activity, Bitmap testImg) {
        Log.i(TAG, "inside prepareViewForFacebook");
        RelativeLayout view = (RelativeLayout) activity.getLayoutInflater().inflate(R.layout.facebook_photo, null, false);
        ImageView imgView = (ImageView) view.findViewById(R.id.test_image);
        imgView.setImageBitmap(testImg);
        return view;
    }

    static Bitmap getBitmapFromView(View v) {
        Log.i(TAG, "inside getBitmapFromView");
        Bitmap map;
        v.setDrawingCacheEnabled(true);
        v.buildDrawingCache(true);
        map = Bitmap.createBitmap(v.getDrawingCache(true));
        v.setDrawingCacheEnabled(false);
        return map;
    }

    static File createCompressedImageFromBitmap(Context context, Bitmap bitmap) {
        Log.i(TAG, "inside createCompressedImageFromBitmap");
        String fileName = "fb_img";// no .png or .jpg needed
        try {
            ByteArrayOutputStream bytes = new ByteArrayOutputStream();
            bitmap.compress(Bitmap.CompressFormat.JPEG, 100, bytes);
            FileOutputStream fo = context.openFileOutput(fileName, Context.MODE_PRIVATE);
            fo.write(bytes.toByteArray());
            // remember close file output
            fo.close();
        } catch (Exception e) {
            e.printStackTrace();
            fileName = null;
        }
        return new File(fileName);
    }