Getting started(入口)
Welcome to Training for Android developers. Here you'll find sets of lessons within classes that describe how to accomplish a specific task with code samples you can re-use in your app. Classes are organized into several groups you can see at the top-level of the left navigation.
欢迎来到android开发者训练，在这里你会从类中得到教训和经验，
考虑如何实现特定的任务，同时这些代码可以重新应用到你的app中，
类被整齐的放在几个组中，你可以很明显的从左边导航栏看到他们。
This first group, Getting Started, teaches you the bare essentials for Android app development. If you're a new Android app developer, you should complete each of these classes in order:
第一组，入门，他将交给你android
app开发的基本要素。如果你是一个新的开发者，
你应该完成每一个类中的任务。