1. Connecting to Web Services on Android Sean Sullivan June 2, 2010

2. HTTP request HTTP response

3. HTTP XML JSON OAuth

4. + HTTP Option 1 java.net.URL java.net.HttpURLConnection Option 2 HttpClient 4.0 API

5. HttpClient 4.0 API org.apache.http.client.HttpClient org.apache.http.impl.client.DefaultHttpClient

6. HttpClient 4.0 API org.apache.http.client.methods.HttpGet org.apache.http.client.methods.HttpPost org.apache.http.client.methods.HttpPut org.apache.http.client.methods.HttpDelete

7. HttpClient 4.0 API org.apache.http.HttpResponse org.apache.http.StatusLine org.apache.http.HttpEntity org.apache.http.utils.EntityUtils

8. HttpClient programming HTTP response status code I/O exceptions timeouts gzip

9. HttpClient programming synchronous invocation public HttpResponse execute(HttpUriRequest request) asynchronous invocation public HttpResponse execute(HttpUriRequest request, ResponseHandler handler)

10. UI programming user clicks on button onClick listener Dont block the UI thread! Tip: use java.lang.Runnable

11. Response formats XML JSON RSS, Atom other

12. JSON processing json.org package Google GSON library XStream + Jettison * json-lib * * does not work on Android 1.x

13. XML processing org.w3c.dom package (DOM) org.xml.sax package (SAX) org.xmlpull package (XPP) XStream JDOM Apache XmlBeans* * does not work on Android 1.x

14. RSS and Atom Rome library * Apache Abdera library * * does not work on Android 1.x

15. Client libraries code.google.com/p/jreeagle code.google.com/p/jpoco code.google.com/p/meetup-java-client

16. Client libraries code.google.com/p/gdata-java-client code.google.com/p/upcoming-java-client ickrj.sourceforge.net

17. Conclusion HttpClient API use XStream for XML processing use Google GSON for JSON processing OAuth has a learning curve

18. Thank you