Learning about Android

I've just returned from Over the Air 2012 at Bletchley Park where for the very first time I actually created and presented an Android application in public. In the past, I have written in C, but that was many years ago and it is completely new to look on programming in such a modular fashion where you construct you application by bolting together so many of the various classes provided by Android as well as incorporating any one of thousands of third party web APIs. It was a steep learning curve just to create the basic app that I did, but I intend to continue my journey and post titbits of the learnings that I take from each step.