Android™ User Interface Design: Turning Ideas and Sketches into Beautifully Designed Apps

Appendix C. Common Task Reference

While working on Android apps, you are likely to learn certain tasks well. You will know the Activity and Fragment lifecycles without needing a reference. You will know how to execute code on a background thread. You will know how to do many tasks because you will have to do them all the time. However, some tasks you only need to do every now and then. You need to do them just often enough that you wish you could easily remember how to accomplish them, but not often enough to necessarily memorize them. Appendix C is meant to show you how to do some of these tasks without having to memorize them.

Indicating Loading in the Action Bar

There are two basic types of progress indicators: determinate and indeterminate. ...