Chapter 3Activities, Fragments, and Intents
An Android application can have zero or more activities. Typically, applications have one or more activities. The main purpose of an activity is to interact with the user. From the moment an activity appears on the screen to the moment it is hidden, it goes through a number of stages. These stages are known as an activity's life cycle. Understanding the life cycle of an activity is vital to ensuring that your application works correctly. In addition to activities, Android N also supports fragments, a feature that was introduced for tablets in Android 3.0 and for phones in Android 4.0. Think of fragments as “miniature” activities that can be grouped to form an activity. In this chapter, you find out how activities and fragments work together.
Apart from activities, another unique concept in Android is that of an intent. An intent is basically the “glue” that enables activities from different applications to work ...
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