Declaring an activity
Activities and other application components, such as
services, are declared in the AndroidManifest XML file. Declaring an activity is how we tell the system about our activity and how it can be requested. For example, an application will usually indicate that at least one activity should be visible as a desktop icon and serve as the main entry point to the application.
Getting ready
Android Studio is the new tool used to develop Android applications, replacing the now-deprecated Eclipse ADT solution. Android Studio will be used for all the recipes shown in this book, so if you have not already installed it, visit the Android Studio website (the link has been provided earlier) to install the IDE and the SDK bundle.
How to do ...
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