The first thing I did to use my Android Smart phone to control my XBMC media centre is installed the Yatse, the XBMC/Kodi Remote in my play store. After I installed the app i followed the instructions to connect it. I needed to enable the Webserver under my system settings on my XBMC media centre. I need to get my IP and Port under you system information.
I tried the Official XBMC Remote. For me it didn't work I couldn't create a new host on the app. THen I used the Yatse, the XBMC/Kodi Remote and it did work.