1) The document discusses building social media applications using Qt and Qt Mobility. 2) It provides an overview of Qt and Qt Mobility and how they allow developing native applications that work across platforms like Symbian, MeeGo, Android, MacOS and Windows. 3) It discusses using OAuth and libraries like kqOAuth and qjson to add social media sharing features to applications using services like Twitter. Code examples of connecting a Qt application to Twitter are also provided.

1. Nokia Dev Con 2011, INAICTA, jakarta, oct 5, 2011
Social App Development with Qt

2. about andri yadi
a (at) dycode (dot) com
@andri_yadi

3. 4 years in a row

4. start my own company & code for food

5. 8 years in mobile development

6. a movie freak

7. the ceo

8. about arif setiawan
arif (at) dycode (dot) com
@ken121f

9. master degree in computer
engineering
hardcore c/c++ developer

10. Nokia platform team lead

11. raise your hand
if you’re
developers!

16. first of all, it’s “qute”
not “qiu ti” nor “qi te”

17. C++ platform-independent

18. multi platform native-app development
native apps
access operating system & its function directly
operating systems
(Symbian, MeeGo, android, MacOS,
Windows)

19. multi platform native-app development
Qt framework
same code works on all platforms,
covers many usecases (GPS, camera)
operating systems
(Symbian, MeeGo, android, MacOS,
Windows)

20. all you need is
Qt SDK 1.1.3
released on Sept 29, 2011

21. Qt Meta-object Language (QML)
Qt Quick declarative programming
Qt User Interface Creation Kit
no C++ skill required
Qt Creator IDE

22. mobility 1.0
Qt mobility
bearer management API
mobility 1.1
contacts
camera
location
document gallery
messaging
feedback
multimedia
Landmarks, map, navigation
publish & subscribe
organizer
sensors
service framework
mobility 1.2
system information
it’s all about NFC, final for MeeGo

23. social media apps

24. users need & want to pay social apps

25. social media apps

26. social apps on Ovi

27. social media apps
build new social platform and/or
leverage existing ones

28. OAuth

29. OAuth 1.0 under the hood
complicated!
kqoauth is your
friend

30. consumer
provider
show provider’s auth.
user grants
page in embedded
browser
authorization
parse access_token redirect to dummy
value from URL
URL with access_token
save access_token to
persistent storage

31. consumer
provider
/dialog/oauth?
client_id={APP_ID}&
response_type=token&
user grants
redirect_uri={DUMMY_URL}& authorization
scope={SCOPE}
http://{DUMMY_URL}/
parse access_token
#access_token={ACCESS_TO
value from URL
KEN}&expires_in={EXPIRE}
save access_token to
persistent storage

32. if you think that’s still too
hard, there’s thin wrapper
qfacebook
(http://gitorious.net/qfacebook)

33. consumer
provider
/oauth2/authenticate?
client_id={CLIENT_ID}& user grants
response_type=token&
redirect_uri={DUMMY_URL}
authorization
http://{DUMMY_URL}/
parse access_token
#access_token={ACCESS_T
value from URL
OKEN}
save access_token to
persistent storage

34. demo

35. Movreak movie grid
Movie detail
city
Share button

36. Harmattan ShareUI

37. QML twitter
HTTP
signal & slot
Twitter Wrapper
kqOAuth
qjson
Qt SDK
Twitter demo architecture

38. QML
C++ (kqOAuth)
user tap sign in to request
Twitter
authorization
show auth page
access token received
save access_token to
persistent storage

39. let’s see the code

40. where to go from here
Nokia developer - http://developer.nokia.com/
Qt – http://developer.nokia.com/Develop/Qt/
latest Qt SDK download – http://developer.nokia.com/Develop/Qt/Tools
all about NFC - http://developer.nokia.com/Develop/NFC/
kqOAuth - http://gitorious.org/kqoauth
qjson - http://gitorious.org/qjson