How to have the option of having a user add an image in android

How to have the option of having a user add an image in android

I am developing an android application for the first time and I was
wondering how can I have a option of having the user upload an image. Like
for example, in a contact manager the user has the option of uploading an
image of a contact. I was wondering how can I do that in my android
application. Any help would be appreciated.