To build great user interfaces for your Android apps that go beyond the standard UI elements, you need to use custom Android views. With these, you can give your app a distinctive look and ensure that it functions properly across multiple devices.

This book will help you construct a great UI for your apps by teaching you how to create custom Android views. You will start by creating your first Android custom view and go through the design considerations. You will then see how the right choices will enable your custom view to perform seamlessly across multiple platforms and Android versions.

You will create custom styleable attributes that work with Android XML layouts, learn to process touch events, define custom attributes, and add properties and events to them.

By the end of this book, you will be able to create apps with custom views that are responsive and adaptable to make your app distinctive and an instant hit with its users.

What you will learn

Extend the standard UI widget framework by creating Custom views

Add complex rendering, animations, and interactions to your views

Optimize performance and decrease battery usage

Implement custom views to share between multiple projects, or share it publicly

Create 3D custom views using OpenGL ES

About the Author

Raimon Ràfols Montané

is a software engineer currently living in the Barcelona area. He has been working on mobile devices since their early stages, ranging from monochrome devices to the current smartphones. During this time, he has worked in several areas: B2C/B2E/B2B apps, portals, and mobile gaming. Due to this broad experience, he has expertise in many technologies and, especially in UI, build systems, and client-server communications.

He is currently working as an engineering manager at AXA Group Solutions in Barcelona, taking care of all the engineering and development processes, mobile application quality, and leading the R&D team. In the past, he has worked abroad for Imagination Technologies near London and for Service2Media in the Netherlands.

In addition, Raimon is the coauthor of Learning Android Application Development, also published by Packt, and he has been the technical reviewer of several other titles, including Mastering Android NDK and Android Things Projects, among others.

Table of Contents

Getting started

Implementing your first Custom View

Handling events

Advanced 2D Rendering

Introducing 3D Custom Views

Animations

Performance Considerations

Sharing our Custom View

Building an Electronic Programming Guide

Building a Charts component

Creating a 3D spinning wheel menu

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