Android How to Program

12. Slideshow App

Objectives

In this chapter you’ll:

• Use Intents and content providers to allow the user to select pictures and music from a device’s Gallery and media library, respectively.

• Launch Intents that return results.

• Use a MediaPlayer to play music from the device’s media library during the slideshow.

• Customize a ListActivity’s layout.

• Use the view holder pattern to improve performance when using complex ListView-item layouts.

• Create a custom GUI for an AlertDialog to allow a user to enter information,

• Load images as Bitmaps using a BitmapFactory.

• Use a TransitionDrawable to gradually transition between two BitmapDrawables that contain images.

Outline

12.1 Introduction

12.2 Test-Driving the Slideshow App

12.3 Technologies ...