title: How to access an image from the phone's photo gallery?
body: <p>By any chance, does anyone know how to access the phone's photo gallery?
  I am making an application that takes a picture of a plant leaf and
  analyzes the image to determine whether or not it is determine. We were hoping that we
  could give the user two options of taking the picture of the leaf or using an image of a
  leaf that the user has already taken. However, we got the picture taking part, but we do not
  know how to access the photo gallery.</p>