One of the most common challenges Android developers face is the variation in screen sizes among the thousands of phones, tablets, and other devices that run Android. The Fragments API (introduced in Android 3.0) provides an elegant solution. With fragments, you can build flexible layouts that adapt to any screen size—and do so dynamically, at runtime. In this course, David Gassner shows how to define a layout, add fragments to activities with Java or XML, create alternative layouts for different screen sizes, and use resource folder names to detect and select the right layout. He also shows you how to communicate between activities and fragments with arguments and callback methods, and use fragments to manage dialogs and shared preferences.Topics include:
- Configuring Android Studio
- Understanding fragments
- Creating a fragment class and layout
- Adding and removing fragments with Java
- Creating layouts for multiple screens
- Understanding arguments and callback methods
- Passing arguments to a fragment
- Choosing layout at runtime
- Displaying dialogs with fragments
- Using fragments for managing dialogs, shared preferences, and more
- Hi, my name is David Gassner. Welcome to this course on using the Android Fragments API to build flexible apps that adapt to different screen sizes. Working in Android Studio, I'll first introduce you to the basic concept of fragments. I'll describe how to define a fragment's layout and how to add it to an activity with XML or Java. I'll then show you how to define multiple layouts for different screens, how to use resource folder names to detect screen sizes and select layouts at runtime and how to pass data back and forth between activities and fragments with arguments and callback methods.
I'll also describe other uses of fragments to manage dialogs, pages managed in the view page or container, and shared preferences. The Fragments API is an important part of any Android developers toolkit. I hope this course helps you get started, building apps that look great on a wide variety of devices.