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Hands-On Android UI Development

Hands-On Android UI Development

By : Jason Morris
3.8 (4)
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Hands-On Android UI Development

Hands-On Android UI Development

3.8 (4)
By: Jason Morris

Overview of this book

A great user interface (UI) can spell the difference between success and failure for any new application. This book will show you not just how to code great UIs, but how to design them as well. It will take novice Android developers on a journey, showing them how to leverage the Android platform to produce stunning Android applications. Begin with the basics of creating Android applications and then move on to topics such as screen and layout design. Next, learn about techniques that will help improve performance for your application. Also, explore how to create reactive applications that are fast, animated, and guide the user toward their goals with minimal distraction. Understand Android architecture components and learn how to build your application to automatically respond to changes made by the user. Great platforms are not always enough, so this book also focuses on creating custom components, layout managers, and 2D graphics. Also, explore many tips and best practices to ease your UI development process. By the end, you'll be able to design and build not only amazing UIs, but also systems that provide the best possible user experience.
Table of Contents (15 chapters)
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13
Activity Lifecycle

Exploring data models and widgets


In theory, the widgets can directly reference the memory that they are manipulating by holding points to the data, rather than copying the data back and forth, but more often than not, it doesn't make sense to use the same data format for storage and for editing.

Take strings of text for example; the best way to store a string is as a character array; whenever you need to send the text anywhere, over the network or to a display, you can simply read from the first character until the last one, and each one can be transmitted as-is. For example, "Hello World" can be stored as the string length followed by each of the characters:

This is not a good way to store a string that is being edited; however, for editing, it's best to have some buffer space around the cursor to avoid having to copy large amounts of data back and forth as the user types and corrects themselves. For example, if the user places their cursor right after the word "Hello", the same array might...

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