3.5. Summary

A big part of the Android platform revolves around the UI and the concepts of activities and views. In this chapter, we explored these concepts in detail and worked on a sample application to demonstrate them. In relation to activities, we addressed the concepts and methods involved, and we covered the all-important lifecycle events the platform uses to manage them. Moving on to views, we looked at common and custom types, attributes that define layout and appearance, and focus and events.

In addition, we examined how Android handles various types of resources, from simple strings to more involved animations. We also explored the AndroidManifest.xml application descriptor and saw how it brings all these components together to define an Android application.