Android has become very popular recently, especially among developers which would like to create some nice apps for mobile environments. This trend can be noted also when looking at the Android category on Stackoverflow. There are a lot of quite simple, introductory questions regarding Android development. Generally speaking, I'd say this is positive :). A lot of interest from the developer community means more apps on the market (forget about the app quality for now ;)).
Today I answered a question about how to get started with Android. Normally I could straight point you to developer.android.com. Google has a lot of very good articles and tutorials there. Here's how I started about more than a year ago with Android (the quoted answer from Stackoverflow):