How to develop using open CV in Android

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Hello, I've installed open CV on Eclipse to develop android apps, but I don't know how to getting started with. I searched on Google to find some tutorials but I didn't found anything. What I want to do is an app that detect some shapes and colors, for example, if I choose yellow circles the app will highlight the yellow circles. PS: Sorry about my English and if you want more details to help me please ask :)