Book Image

Flash Development for Android Cookbook

By : Joseph Labrecque
Book Image

Flash Development for Android Cookbook

By: Joseph Labrecque

Overview of this book

Flash has now arrived to Android — the fastest growing smartphone platform. This offers massive opportunities for Flash developers who want to get into mobile development. At the same time, working on smartphones will introduce new challenges and issues that Flash developers may not be familiar with. The Flash Development for Android Cookbook enables Flash developers to branch out into Android mobile applications through a set of essential, easily demonstrable recipes. It takes you through the entire development workflow: from setting up a local development environment, to developing and testing your application, to compiling for distribution to the ever-growing Android Market. The Flash Development for Android Cookbook starts off with recipes that cover development environment configuration as well as mobile project creation and conversion. It then moves on to exciting topics such as the use of touch and gestures, responding to device movement in 3D space, working with multimedia, and handling application layout. Essential tasks such as tapping into native processes and manipulating the file system are also covered. We then move on to some cool advanced stuff such as Android-specific device permissions, application debugging and optimization techniques, and the packaging and distribution options available on the mobile Android platform. In a nutshell, this cookbook enables you to get quickly up to speed with mobile Android development using the Flash Platform in ways that are meaningful and immediately applicable to the rapidly growing area of mobile application development.

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Flash Development for Android Cookbook
Joseph Labrecque
Jun, 2011 | 372 pages
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Table of Contents (18 chapters)
Flash Development for Android Cookbook
Flash Development for Android Cookbook
Credits
Credits
Foreword
Foreword
About the Author
About the Author
About the Reviewers
About the Reviewers
www.PacktPub.com
www.PacktPub.com
Preface
Preface
Free Chapter
1
Getting Ready to Work with Android: Development Environment and Project Setup
Getting Ready to Work with Android: Development Environment and Project Setup
Introduction
Using Flash Professional CS5.5 to develop Android applications
Targeting AIR for Android with Flash Professional CS5.5
Using Flash Builder 4.5 to develop Android applications
Enabling Flash Builder 4 or Flex Builder to access Flex Mobile SDKs
Using Flash Builder 4 and below to develop Android applications
Enabling Powerflasher FDT 4.1 to access Flex Mobile SDKs
Using Powerflasher FDT 4.1 and below to develop Android applications
Converting a standard Flex project to a Flex Mobile project
Configuring the AIR SDK to package AIR for Android applications on Windows
Configuring the AIR SDK to package AIR for Android applications on Linux or Mac OS
2
Interaction Experience: Multitouch, Gestures, and Other Input
Interaction Experience: Multitouch, Gestures, and Other Input
Introduction
Detecting supported device input types
Detecting whether or not a device supports multitouch
Verifying specific gesture support for common interactions
Using gestures to zoom a display object
Using gestures to pan a display object
Using gestures to swipe a display object
Using gestures to rotate a display object
Accessing raw touchpoint data
Creating a custom gesture based upon touchPoint data
Emulating the Android long-press interaction
Invoking the virtual keyboard programmatically
Responding to Android soft-key interactions
Responding to trackball and D-Pad events
3
Movement through Space: Accelerometer and Geolocation Sensors
Movement through Space: Accelerometer and Geolocation Sensors
Introduction
Detecting whether or not an Android device supports the accelerometer
Detecting Android device movement in 3D space
Adjusting the accelerometer sensor update interval
Updating display object position through accelerometer events
Switching between portrait and landscape based upon device tilt
Detecting whether or not a device supports a geolocation sensor
How it works...
There's more...
See also…
Retrieving device geolocation sensor data
Adjusting the geolocation sensor update interval
Retrieving map data through geolocation coordinates
4
Visual and Audio Input: Camera and Microphone Access
Visual and Audio Input: Camera and Microphone Access
Introduction
Detecting camera and microphone support
Using the traditional camera API to save a captured image
Using the Mobile CameraUI API to save a captured photograph
Using the Mobile CameraUI API to save a captured video
Using the device microphone to monitor audio sample data
Recording Microphone Audio Sample Data
5
Rich Media Presentation: Working with Images, Video, and Audio
Rich Media Presentation: Working with Images, Video, and Audio
Introduction
Loading photographs from the device cameraRoll
How it works…
There's more…
Applying Pixel Bender Shader effects to loaded images
Playing video files from the local filesystem or over HTTP
Playing remote video streams over RTMP
Playing audio files from the local filesystem or over HTTP
Generating an audio spectrum visualizer
Generating audio tones for your application
6
Structural Adaptation: Handling Device Layout and Scaling
Structural Adaptation: Handling Device Layout and Scaling
Introduction
Detecting useable screen bounds and resolution
Detecting screen orientation changes
Scaling visual elements across devices at runtime
Scaling visual elements based on stage resize in Flash Professional CS5.5
Employing the Project panel in Flash Professional CS5.5
Freezing a Flex application to landscape or portrait mode
Defining a blank Flex mobile application
Defining a Flex mobile view-based application
Defining a Flex mobile tabbed application with multiple sections
Using a splash screen within a Flex mobile application
Configuring the ActionBar within a Flex mobile project for use with ViewNavigator
Hiding the ActionBar control in a single view for a Flex mobile project
7
Native Interaction: StageWebView and URI Handlers
Native Interaction: StageWebView and URI Handlers
Introduction
Opening a website in the default Android browser
Rendering a website within an application
Managing the StageWebView history
Using StageWebView to load ads using ActionScript
Using StageWebView to load ads within a Flex mobile project
Making a phone call from an application
Sending a text message from an application
Invoking Google maps from an application
Invoking the Android Market using application URIs
Sending e-mail from an application
8
Abundant Access: File System and Local Database
Abundant Access: File System and Local Database
Introduction
Opening a local file from device storage
Saving a file to device storage
Saving data across sessions through local shared object
Storing application state automatically by using Flex
Creating a local SQLite database
Providing a default application database
Automating database tasks with FlexORM
9
Manifest Assurance: Security and Android Permissions
Manifest Assurance: Security and Android Permissions
Introduction
Setting application permissions with the Android Manifest file
Preventing the device screen from dimming
Establishing Android custom URI schemes
Anticipating Android Compatibility Filtering
Instructing an application to be installed to Device SDCard
Encrypting a local SQLite database
10
Avoiding Problems: Debugging and Resource Considerations
Avoiding Problems: Debugging and Resource Considerations
Introduction
Debugging an application with Flash Professional
Debugging an application with Flash Builder
Rendering application elements using the device GPU
Automating application shutdown upon device interruption events
Exiting your application with the device back button
Monitoring memory usage and frame rate in an application
11
Final Considerations: Application Compilation and Distribution
Final Considerations: Application Compilation and Distribution
Introduction
Generating a code-signing certificate using Flash Professional
Generating a code-signing certificate using Flash Builder
Generating a code-signing certificate using FDT
Generating a code-signing certificate using the AIR Developer Tool
Preparing icon files for distribution
Compiling an application using Flash Professional
Compiling an application using Flash Builder
Compiling an application when using FDT
Compiling an application using the AIR Developer Tool
Submitting an application to the Android Market

Switching between portrait and landscape based upon device tilt

Most Android devices will allow both portrait and landscape views for the user to interact with. The portrait mode is enabled when the device is held with the y-axis aligned from top to bottom, while landscape mode is enabled by holding the device so that the y-axis is measured from left to right. By using data reported from the accelerometer sensor, we can know when these movements have occurred and respond to them within our application.

How to do it...

We will need to employ the Accelerometer API to detect device rotation and tilt:

  1. 1. First, import the following classes into your project:

    import flash.display.Sprite;
import flash.display.Stage;
import flash.display.StageAlign;
import flash.display.StageScaleMode;
import flash.events.AccelerometerEvent;
import flash.sensors.Accelerometer;
import flash.text.TextField;
import flash.text.TextFormat;

  2. 2. We'll now declare a number of objects to use in the example. First, a TextField...

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