VeryUsefulLinks.txt

username for geonames is 
praducg
email
password:Test*1234

Very useful links
http://www.androidbegin.com/tutorial/android-populating-spinner-json-tutorial/
Web service to get list of countries
http://api.geonames.org/countryInfoJSON?username=praducg

Web service to get list of state[India is the example]
http://api.geonames.org/childrenJSON?geonameId=1269750&username=praducg

Web service to get list of cities
http://api.geonames.org/childrenJSON?geonameId=1267701&username=praducg

https://stackoverflow.com/questions/9760341/retrieve-a-list-of-countries-from-the-android-os


http://www.javaknowledge.info/populate-second-spinner-based-on-selection-of-first-spinner/

https://www.mkyong.com/android/android-spinner-drop-down-list-example/

Run multiple asynchronous tasks at a time.
http://android-er.blogspot.in/2014/04/run-multi-asynctask-as-same-time.html
http://blogs.innovationm.com/multiple-asynctask-in-android/