Android has always been about connectivity and providing a great web browsing experience, so building your app with web technologies can be a great opportunity. Not only can you build an app on the web and still optimize your designs for Android's various screen sizes and densities, but you can also embed web-based content into your Android app using WebView.
The Android Developer Tools (ADT) plugin for Eclipse provides a professional-grade development environment for building Android apps. It's a full Java IDE with advanced features to help you build, test, debug, and package your Android apps.
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