After previously installing Android Studio (a stable version and also the bleeding edge version), I studied the following document (as much as I needed to get started):
The above document I finished today. Then I started on the following document to learn how to get started developing Android apps:
I will continue using the document above, going through every section in order, then go on to the therein suggested Udacity videos.
I’m also using this book:
But will start the above book (it needs your full attention) after completing the following Udacity video courses…
Android Basics: User Interface – https://classroom.udacity.com/courses/ud834
Android Basics: User Input – https://classroom.udacity.com/courses/ud836
There are many more Android Development courses at Udacity which I will take after completing the Big Nerd Ranch textbook course.