http://code.google.com/mobile/analytics/docs/android
In addition to the JavaScript-based Google Analytics Tracking Code that empowers webmasters to track activity on standard web pages, Google Analytics also provides a web service and a pair of SDKs to help track user interaction with websites and applications accessed from a mobile device.
If you’re developing for a mobile platform, you can use Google Analytics to track the following:
User engagement with a native iOS or Android application
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