The Android SDK is required to develop Android applications. The developers used Eclipse and the Android plugin to develop Android applications at the beginning of the Android development. But later, Google announced that Android Studio is the official tool for Android application development. It has all the vital modules, such as Gradle, Maven, Android SDK, NDK, Java JDK, and so on, so we don't have to utilize the Terminal command line. In Chapter 1, About the Environment, we demonstrated how to download and create a sample Android application using Android Studio.

The source code with an example for this chapter is available on GitHub at the following link: https://github.com/PacktPublishing/Learn-Spring-for-Android-Application-Development/tree/master/Chapter04