below is the link :
I have tried above link's instructions. but i am not getting expected apk.
so i have tried another way,
1 exported with cordova.
2 I am not deleting any file in construct2 folder.
3 I used webview instead of canvas.
4 use this link :
5 install native android admob plugin.
6 then compile.
now showing the ads on device. but I am not sure this method is correct or wrong.
just i have tried today.
if you will get any solution, please let me know, and please check this is correct or wrong.