i am using eclipse for development of android application. i want to connect my application to magento. i am new developer so i have not too much idea about this.
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For those who are still looking at answer, I have put down my research in below link, we were able to sucessfully create mobile app for IOS and andriod with libraries mentioned in below link..please go through once..
http://www.siddharthvaghasia.com/2014/12/11/connect-ios-and-andriod-app-to-magento-store/
For andriod...here is steps with example.. http://www.siddharthvaghasia.com/2014/12/14/use-k2soap-library-android-platform-consume-magento-soap-api-v2/
Note- Not able to add to comment to posted in answer...
If anyone looking for android application for magento site, you can use this.
Magento offers two API's to develop your app in Android
REST API - http://www.magentocommerce.com/api/rest/introduction.html
You have to create a New User in your Magento Store with roles.That you can do by loging in to your Admin and the option is under the system->WebServices->User&Roles.
Before stating Android side make sure the magento configured properly. Test the urls in browser first then use it in Application.