Objectives

In this chapter you’ll:

Support both portrait and landscape device orientations.

Extend ListActivity to create an Activity that displays a list of items in a ListView.

Enable users to interact with an app via an ImageButton.

Manipulate collections of data.

Use SharedPreferences to store key–value pairs of data associated with an app.

Use a SharedPreferences.Editor to modify key–value pairs of data associated with an app.

Use an ArrayAdapter to specify a ListView’s data.

Use an AlertDialog.Builder object to create dialogs that display options as Buttons or in a ListView.

Use an implicit Intent to open a website in a browser.

Use an implicit Intent to display an intent chooser containing a list of apps that can share text.

Programmatically hide the soft keyboard.