Design Patterns

Xtend Android

  • Explore the structure of an Android Application written in Xtend, paying particular attention to:
    • general reduction in boilerplate code
    • liberal use of lambdas and other convenience features
  • Use this application to review sync issues and now they can be managed using:
    • Services
    • Broadcast Receivers
  • The illustrative application is based on Yamba twitter client, derived from:
  • The twitter-like service is available here:

Supplementary Material:

  • Some additional patterns worth reviewing (slides attached)
    • Mediator
    • Composite
    • Bridge

Slides

0-xtend.pdf a-yamba.pdf b-xtend-android-app.pdf c-services.pdf d-command.pdf e-broadcast-recievers.pdf f-mediator.pdf g-composite.pdf h-bridge.pdf

Lab

Start

Objectives

  • Develop an application in Android using the Xtend language
  • Base the application on a twitter-like service hosted here:
  • The structure of the application is derived from Learning Android

Lab

Start

Objectives

  • Introduce Services into the Xtend YambaX application
  • Implement a background service to periodically update the twitter timeline

Lab

Start

Objectives

  • Incorporate Broadcast Event Senders/Receivers into the application
  • Use BootReciever to recieve boot event to start application service on launch
  • Use NetworkReveicer to stop/start service when network is starting/stopping
  • Use Broadcast Events for status updates from background service to TimelineActivity

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Prepared by Eamonn de Leastar (edeleastar@wit.ie). Except where otherwise noted, this content is licensed under a Creative Commons Attribution-NonCommercial 4.0 License