Book Image

Android Programming for Beginners - Third Edition

By : John Horton
Book Image

Android Programming for Beginners - Third Edition

By: John Horton

Overview of this book

Do you want to make a career in programming but don’t know where to start? Do you have a great idea for an app but don't know how to make it a reality? Or are you worried that you’ll have to learn Java programming to become an Android developer? Look no further! This new and expanded third edition of Android Programming for Beginners will be your guide to creating Android applications from scratch. The book starts by introducing you to all the fundamental concepts of programming in an Android context, from the basics of Java to working with the Android API. You’ll learn with the help of examples that use up-to-date API classes and are created within Android Studio, the official Android development environment that helps supercharge your mobile application development process. After a crash course on the key programming concepts, you’ll explore Android programming and get to grips with creating applications with a professional-standard UI using fragments and storing user data with SQLite. This Android Java book also shows you how you can make your apps multilingual, draw on the screen with a finger, and work with graphics, sound, and animations. By the end of this Android programming book, you'll be ready to start building your own custom applications in Android and Java.
Table of Contents (30 chapters)

Dialog windows

On many occasions, in our apps, we will want to show the user some information or even ask for confirmation of an action in a pop-up window. This is known as a dialog window. If you quickly scan the palette in Android Studio, then you might be surprised to see that there is no mention whatsoever of dialogs.

Dialogs in Android are more advanced than a simple widget or even a whole layout. They are classes that can have layouts and other User Interface (UI) elements of their own.

The best way to create a dialog window in Android is to use the FragmentDialog class.

Note

Fragments are a wide and vital topic in Android, and we will spend much of the second half of this book exploring and using them.

Creating a neat pop-up dialog (using FragmentDialog) for our user to interact with is a great introduction to fragments, and it's not overly complicated at all.

Creating the Dialog Demo project

We previously mentioned that the best way to create a dialog...