Are there libraries similar to the Three20 Project for Android?
The Three20 project is really nice for building iPhone apps quickly using common libraries: https://github.com/facebook/three20 Is there anything like this for Android? Not exactly, but working at a company with a partially three20 based iPhone app developed in parallel with the Android version, I think about 50% of what 320 does you get right out of the platform on Android, minus a little polish. For example, 320's Navigator and TextEditor are basically baked in on Android - the platform's native text editing components can stretch dynamically on their own, and task navigation and back-button