Google's head developer advocate Reto Meier has introduced a new series of online courses to get you started writing Android apps. The Android Fundamentals online training course is being offered by Udacity, and along with Meier and developer advocates Dan Galpin and Katherine Kuan, is designed for folks new to Android or even mobile development, but have the basics of programming covered.
The free courses (there are paid options as well) offers step-by-step training where you can learn best practices of mobile app development, and Android practices in particular. Everything you need to get started, including the videos, quizzes and forums, is free and students interested in diving deeper can enroll in Udacity's full program.
If you're interested in writing Android apps, this looks like a great place to get started. See the source link below for all the information.
Source: Android Developers blog