My bitmap image is cropped after decodeUri

I'm using this method:

public Bitmap decodeUri(Uri selectedImage) throws FileNotFoundException {

    BitmapFactory.Options o = new BitmapFactory.Options();
    o.inJustDecodeBounds = true;
    BitmapFactory.decodeStream(getContentResolver().openInputStream(selectedImage), null, o);

    final int REQUIRED_SIZE = 800;

    int width_tmp = o.outWidth, height_tmp = o.outHeight;
    int scale = 1;
    while (true) {
        if (width_tmp / 2 < REQUIRED_SIZE || height_tmp / 2 < REQUIRED_SIZE) {
            break;
        }
        width_tmp /= 2;
        height_tmp /= 2;
        scale *= 2;
    }

    BitmapFactory.Options o2 = new BitmapFactory.Options();
    o2.inSampleSize = scale;
    return BitmapFactory.decodeStream(getContentResolver().openInputStream(selectedImage), null, o2);
}

To decode an URI from mi camera and then send to my webserver via an HttpURLConnection object in POST headers. But my instead get my original image:

I get a cropped image:

I don't know why. Perhaps my decodeURI method is wrong? Anybody know other best method to send my image compressed to my webserver?

I used right now the next way instead of my decodeUri method:

mybitMap = MediaStore.Images.Media.getBitmap(this.getContentResolver(), selectedImageUri);

and I have the same problem. And when I tried to open the image in my webserver with Photoshop, I see an advertisement which says "This document may be damaged (the file may be truncated or incomplete). Do you want continue?" And , after continue, I see a black space in the bottom of the image...

Anybody knows why? My code:

Bitmap mybitMap = null;
   try {
      mybitMap = MediaStore.Images.Media.getBitmap(this.getContentResolver(), selectedImageUri);

   } catch (FileNotFoundException e) {
       e.printStackTrace();
   } catch (IOException e) {
       e.printStackTrace();
   }


   ByteArrayOutputStream baos = new ByteArrayOutputStream();
   imagen.compress(Bitmap.CompressFormat.JPEG, 100, baos);

And I send this in POST Headers:

 Base64.encodeToString(baos.toByteArray(), Base64.DEFAULT);