Test Driven Development on Android

Although at the very beginning, TDD, especially the UI part, looked challenging on Android, now after about 90 tests and 4,5 epic stories, I am comfortably to say that Android app can be developed in a TDD fashion reasonably smooth. You just need to accept that you can't test the interaction between UI and domain model using mock framework. Then you design in a way so that such need will be reduced to minimum. Some Android API might not be test friendly, you can solve that by introducing some middle layer abstraction.