Consuming Web Services with Android

As mobile apps continue to get more sophisticated, they need data, whether it’s the from the business backend or the current scoreboard for a game server hosted in the cloud. Find out how to connect to and consume web services with your Android application. We’ll get connected to the cloud, working with REST web services and learning how to parse the results.

Transcript

1. Consuming Web Services
2. Mobile • Develop • Design • Lead • Train • Troubleshoot David Truxall, Ph.D. @davetrux http://blog.davidtruxall.com
4. https://github.com/davetrux/aa-gdg-code Get the code
5. The Mobile Problem (for developers)
6. Screen Real Estate
7. CPU Power
8. Memory Constrained
9. Network Bandwidth
10. Familiar?
11. XML JSON Web Services Soap REST
12. REpresentational State Transfer GET POST PUT DELETE
13. JavaScript Object Notation [ { "lastName": "Valdez", "firstName": "Christian", "gender": "m" }, { "lastName": "Alston", "firstName": "Christie", "gender": "f" } ]
14. XML <address> <street>123 Main St.</street> <city>Anytown</city> <state>MI</state> <postal>48123</postal> </address> 128 Characters JSON { "street": "123 Main St.", "city" : "Anytown", "state" : "MI", "postal" : "48123" } 100 Characters
15. Where? Google Amazon Twitter Facebook eBay Baas Providers programmableweb.com Windows Azure Government LinkedIn Flickr Yahoo Yelp Your company Build Some!
16. Web Services and Android
17. Lots of Options
18. Not in an Activity
19. AsyncTask vs. Service
20. AsyncTask
21. Activity States Active when request completes Paused then resumed and request completes Paused when request completes then resumed
22. Demo
23. Services Not a daemon or Windows Service Like a cron job or scheduled task
24. IntentService vs. Service
25. Activity IntentService IntentService Web Services Intent w/URL & params REST + JSON Intent w/data
26. Apache client vs HttpUrlConnection NTLM Redirects (302) Caching (304) Future Versions
27. Code
28. What's Missing Long Running calls Persistence HTTP Headers Error Handling Security Configuration
29. Performance Data size Paging gzip
30. Google IO 2010 Presentation Services Documentation Code on Github This Presentation My Blog Resources @davetrux