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1. App Inventor for Android
Do-it-yourself App Creation

2. Talk Outline
 App Development (iPhone/Android)
 App Inventor introduction
 App Inventor at USF
 Demo: No Texting While Driving
 App Inventor’s Secret Sauce
 What you can build

3. Smartphone market share

4. Market share w/newbies

5. Developing Apps
 iPhone
- Objective C
- High level tools to turn pre-existing content into an
app. (e.g., http://www.appmakr.com/learn_more/)
 Android
- Java
- App Inventor

6. App Inventor
 Blocks language, like plugging in puzzle pieces.
 Similar to Lego Mindstorms and Scratch but for
phones not robots
 “Hypercard” for mobile phones, “electronic
napkin” for prototyping apps
 Democratizes app building.

7. An App Inventor App
What do you think this app does?

8. App Inventor at USF
 CS 107: Computing, Robots, and the Web.
- 4th semester teaching App Inventor
- Now 2 sections
 Students’ work cited in SF Chronicle,NY Times,
Techcrunch, Wired, …
 Wolber authored App Inventor tutorials
• O’Reilly Video series
 Co-authoring book

9. Demo: “No Texting While Driving”
 Three windows of environment
 Change title, show in emulator
 Add label, textbox, button for custom response
 Respond with a fixed message,test
 Use custom response of user
 Custom response for mom
 Speak it aloud

10. Why is it so easy?
 No syntax. The blocks language eliminates the need to
remember and type code
 Everything is right in front of you. Components and
functions are in drawers. Just find,drag, and drop.
 Events at top level. "When this happens, the app does this"
is the correct conceptual model.
 High-level components. The app inventor team has built a
great library with simplicity the main goal.
 Only some blocks plug-in. You can't do things that don't
make sense.
 Concreteness. Less abstract than many languages.

11. Apps students have built
 Quizzes, surveys, study guides
 USF restaurant guides
 Droid Where’s my car?
 Broadcast Hub
 Next Muni
 Games

12. What you can build
 Educational apps
- Including video, images, text-to-speech
 Location-aware apps
 Games
 NXT Robot Controllers
 Web-enabled apps
 Personal apps

13. Demo: Quiz App
 Lists for questions,answers
 Index to walk through questions
 Next button
 Checking the answer

14. Try It!
 Go to: appinventor.googlelabs.com
 Register and get started
- Download software
- Try HelloPurr app and other tutorials
- Use phone or emulator
 Help-- Wolber’s sites:
– appinventor.org
- appinventorapi.com (advanced)
 Take CS 107 (and send students!)