Décoder une image à l'échelle

Bonjour
Voici le code qui permet de décoder une image à l'échelle sous Android:
private void setPic() {

int targetW = mImageView.getWidth();
int targetH = mImageView.getHeight();


BitmapFactory.Options bmOptions = new BitmapFactory.Options();
bmOptions.inJustDecodeBounds = true;
BitmapFactory.decodeFile(mCurrentPhotoPath, bmOptions);
int photoW = bmOptions.outWidth;
int photoH = bmOptions.outHeight;


int scaleFactor = Math.min(photoW/targetW, photoH/targetH);


bmOptions.inJustDecodeBounds = false;
bmOptions.inSampleSize = scaleFactor;
bmOptions.inPurgeable = true;

Bitmap bitmap = BitmapFactory.decodeFile(mCurrentPhotoPath, bmOptions);
mImageView.setImageBitmap(bitmap);
}