cordova - Failed to install 'plugin.google.maps':Error: Variable(s) missing: API_KEY_FOR_ANDROID -

i have ionic project works fine, when try run

ionic platform add android  

i error :

failed install 'plugin.google.maps':error: variable(s) missing: api_key_for_android     @ c:\users\rsone\appdata\roaming\npm\node_modules\cordova\node_modules\cordova-lib\src\plugman\install.js: 299:23     @ _fulfilled (c:\users\rsone\appdata\roaming\npm\node_modules\cordova\node_modules\q\q.js:787:54)     @ self.promisedispatch.done (c:\users\rsone\appdata\roaming\npm\node_modules\cordova\node_modules\q\q.js:8 16:30)     @ promise.promise.promisedispatch (c:\users\rsone\appdata\roaming\npm\node_modules\cordova\node_modules\q\ q.js:749:13)     @ c:\users\rsone\appdata\roaming\npm\node_modules\cordova\node_modules\q\q.js:557:44     @ flush (c:\users\rsone\appdata\roaming\npm\node_modules\cordova\node_modules\q\q.js:108:17)     @ process._tickcallback (node.js:419:13) 

even got same error while installing google map plugin. installed phonegap method rather cordova way.

first if have tried installing plugin. check in plugin list. don't kow in ionic, in cordova

cordova plugin ls 

if google maps plugin installed uninstall it.

now download folder given there.google map plugin

extract , edit api keys in plugin.xml (refer https://github.com/wf9a5m75/phonegap-googlemaps-plugin/wiki/phonegap-usage#5-install-this-plugin)

later install using local plugin -

cordova local plugin add (path plugin)/phonegap-googlemaps-plugin-master/