As a beginning Android programmer, you face a steep learning curve. Learning Android is like moving
to a foreign city. Even if you speak the language, it will not feel like home at first. Everyone around
you seems to understand things that you are missing. Things you already knew turn out to be dead
wrong in this new context.
Android has a culture. That culture speaks Java, but knowing Java is not enough. Getting your head
around Android requires learning many new ideas and techniques. It helps to have a guide through
unfamiliar territory.
That’s where we come in. At Big Nerd Ranch, we believe that to be an Android programmer, you
must:
• write Android applications
• understand what you are writing
This guide will help you do both. We have trained hundreds of professional Android programmers
using it. We lead you through writing several Android applications, introducing concepts and
techniques as needed. When there are rough spots, when some things are tricky or obscure, you will
face them head on, and we will do our best to explain why things are the way they are.
This approach allows you to put what you have learned into practice in a working app right away rather
than learning a lot of theory and then having to figure out how to apply it all later. You will come away
with the experience and understanding you need to get going as an Android developer.

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