Working with JSON in Android

1. http://www.androidhive.info/2012/01/android-login-and-registration-with-php-mysql-and-sqlite/
2. http://www.androidhive.info/2011/10/android-login-and-registration-screen-design/

I. Working with JSON in Android
 1.http://androiddigger.com/#!/working-with-json-in-android
2.  http://www.vogella.com/articles/AndroidJSON/article.html


II.Send and Receive JSON between Android and PHP Web Service

1. http://www.codeproject.com/Articles/267023/Send-and-receive-json-between-android-and-php
2. http://www.androidcompetencycenter.com/2009/10/json-parsing-in-android/
3. http://stackoverflow.com/questions/7076576/how-to-call-a-json-webservice-through-android
4. http://inchoo.net/mobile-development/android-development/simple-android-json-parsing-example-with-output-into-listactivity/
5. http://mobile.dzone.com/news/android-tutorial-how-parse  
6. http://www.androidhive.info/2012/01/android-json-parsing-tutorial/
 7.http://stackoverflow.com/questions/2818697/sending-and-parsing-json-in-android

III.Connection between PHP (server) and Android (client) Using HTTP and JSON

1.http://fahmirahman.wordpress.com/2011/04/21/connection-between-php-server-and-android-client-using-http-and-json/ 

Others:
1.https://www.ibm.com/developerworks/xml/library/x-dataAndroid/
2. http://www.ibm.com/developerworks/xml/library/x-andbene1/
3 http://logc.at/2011/09/26/working-with-json/  
4 .http://www.techrepublic.com/blog/app-builder/use-gson-to-work-with-json-in-your-android-apps/1386