I want to understand what is cordova-android.
When I add a platform to ionic/cordova using:
ionic cordova platform add android
which version of the platform is added?
Als, which version of cordova-android corresponds to which version of android API?
How can I change the version of cordova-android and the android API version in my build?
And Do the versions need to match for a successful build?
The one that is pinned in your Cordova CLI version.
See documentation: Android Platform Guide - Apache Cordova
Define which version to install with ionic cordova platform add android@6.2.3 (example 6.2.3).
Your build environment has to match the cordova-android version - you can check with ionic cordova requirements.