Web service and Its Integration in Android

Web services and its integration in Android. Presented this talk in NitroDroid 2012.

Transcript

1. Web service and Its integration
   in Android
   - By Paresh Mayani (@pareshmayani)
   Internet
   Database
   Database
   Web Services
   

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2. Web service?
   • The W3C defines a “web service” as “a
   software system designed to support
   interoperable machine-to-machine interaction
   over a network.
   

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3. Request
   Sending data
   like Name,
   Address
   Method
   GET, POST
   Response
   Receiving
   data
   FORMAT
   XML / JSON
   

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4. Categories of web service
   • SOAP Web Service
   • RESTful Web Service
   

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5. Soap Web Service
   • Simple Object Access Protocol
   • An XML-based messaging protocol.
   • Communication between the web
   service and client happens using
   XML messages
   • SOAP defines the rules for
   communication like what are all the
   tags that should be used in XML and
   their meaning.
   

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6. RESTful Web Service
   • Representational State Transfer
   (REST)
   • Describe an architecture style of
   networked systems.
   • An Architectural Style, Not a
   Standard
   • It uses architectures that use HTTP
   or similar protocols by restricting
   the interface to use standard
   operations like GET, POST, PUT,
   DELETE for HTTP
   

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7. Goodbye SOAP – Welcome JSON
   REST
   • Lightweight - not a lot of extra xml markup
   • Human Readable Results
   

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8. JSON
   • JavaScript Object Notation
   • It is a lightweight data-interchange format.
   • It is easy for humans to read and write.
   • It is easy for machines to parse and generate.
   JSON is built on two structures:
   • A collection of name/value pairs. In various languages, this is
   realized as an object, record, struct, dictionary, hash table, keyed
   list, or associative array.
   • An ordered list of values. In most languages, this is realized as an
   array, vector, list, or sequence.
   • Reference: http://www.json.org/
   

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9. JSON Structure
   JSON
   Object
   JSON
   Array
   http://www.technotalkative.com/android-json-parsing/
   

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10. + HTTP
    • Option 1:
    java.net.URL;
    java.net.HttpURLConnection;
    • Option 2:
    HTTPClient API
    

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11. HttpClient API
    

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12. Request
    

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13. Request
    

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14. No Request
    

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15. Get in Touch
    twitter.com/pareshmayani
    fb.com/GDGAhmedabad
    http://gplus.to/GDGAhmedabad
    http://www.technotalkative.com/
    

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