I was thinking of using this version of android to make my touchscreen into a tablet that can use apps in this image. I do know that the installing process of each OS is different. The image I'm attempting to install is located here: http://androidpi.wikia.com/wiki/Android_Pi_Wiki
From the site:
Razdroid is a community effort by volunteers. There is no connection or support from the Raspberry Pi foundation or its distributors.
Use at your own risk..
Razdroid is antithetical to the design and intent of the Raspberry PI... of course the Foundation is free to comment (or not) as they see fit... but, if you want an Android tablet, well, make one using the Pine64 board; that is what it was designed for. Or, better still, buy an Android tablet; they're fantastic and they're connected directly to the google play store.
But, if you own a Raspberry PI, why in the world would you want to restrict its use to a tablet and google apps... the whole point of the Raspberry PI is to confront, battle, and destroy the point-and-grunt culture of illiterate noobs who know nothing about computers, nor how to configure them, nor how to program them...