Pro Android 4

Summary

This chapter discussed asynchronous dialogs and how to use dialog fragments, including the following topics:

• What a dialog is and why you use one
• The asynchronous nature of a dialog in Android
• The three steps of getting a dialog to display on the screen
• Creating a fragment
• Two methods for how a dialog fragment can create a view hierarchy
• How a fragment transaction is involved in displaying a dialog fragment, and how to get one
• What happens when the user presses the Back button while viewing a dialog fragment
• The back stack, and managing dialog fragments
• What happens when a button on a dialog fragment is clicked, and how you deal with it
• A clean way to communicate back to the calling activity from a dialog fragment
• How one dialog fragment ...