twitter integration with my android application

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http://stackoverflow.com – I have to integrate twitter in my android application.so i have to get the souce code from here. please check the code... I have to imported the app and added jar files also.now i have to run the application which means am getting twitter connection failed error...why these error is happening ??? please provide me solution for these... I have changed my customer key and secret key and also added internet permission... (HowTos)