Android SDK not found. Confirm that it is installed. If it is not in the default location, set the environment variable ANDROID_HOME.
This is the problem that returns cordova when I use the command cordova requirements to know if all the development kits are installed, I tried to create the variable android_home but it has not been useful.
I have Android Studio installed so I should find it but apparently from what I've been reading there is a problem with the last update of cordova .
I have a doubt if you could install all the packages in a project folder and redirect the search to that folder so you do not have to be touching the system, could it be done? 
Could someone tell me how to install the gradle?