Sign In Start Free Trial
Account

Add to playlist

Create a Playlist

Modal Close icon
You need to login to use this feature.
  • Android Programming for Beginners
  • Toc
  • feedback
Android Programming for Beginners

Android Programming for Beginners

By : John Horton
4.2 (12)
close
Android Programming for Beginners

Android Programming for Beginners

4.2 (12)
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)
close

Building an image gallery/slider app

Create a new project in Android Studio called Image Pager. Use the Empty Activity template and leave all the rest of the settings at their defaults.

The images are in the download bundle in the Chapter 25/Image Pager/drawable folder. This next screenshot shows them in Windows File Explorer:

Figure 25.2 – Add images

Add the images to the drawable folder in the Project Explorer in Android Studio or you could add more interesting images, perhaps some photos you have taken.

Implementing the layout

For a simple image paging app, we use the PagerAdapter class. We can think of this as being like RecyclerAdapter but for images as it will handle the display of an array of images in a ViewPager widget. This is much like how RecyclerAdapter handles the display of the contents of an ArrayList in a ListView. All we need to do is override the appropriate methods.

To implement an image gallery with PagerAdapter, we first...

bookmark search playlist download font-size

Change the font size

margin-width

Change margin width

day-mode

Change background colour

Close icon Search
Country selected

Close icon Your notes and bookmarks

Delete Bookmark

Modal Close icon
Are you sure you want to delete it?
Cancel
Yes, Delete