O'Reilly logo

Learning MIT App Inventor: A Hands-On Guide to Building Your Own Android Apps by Mark Sherman, Derek Walter

Stay ahead with the world's most comprehensive technology and business learning platform.

With Safari, you learn the way you learn best. Get unlimited access to videos, live online training, learning paths, books, tutorials, and more.

Start Free Trial

No credit card required

Additional Exercises

1. This app has one big possible bug: What happens when two players press Send! with different words at about the same time? (This is the same thing that happens if someone playing skips someone else’s turn and plays early.)

2. Add some feedback to the user that lets the user know that the app is sending or updating. Be careful—you don’t want to say that it’s updating when it’s not.

3. How else could you use this functionality? Perhaps you could program an app that allows users to add numbers as part of creating an equation. Think of other possible uses for a group activity app that uses database storage.

4. This functionality also could be useful in conducting a poll. Several users with the app could submit an answer to ...

With Safari, you learn the way you learn best. Get unlimited access to videos, live online training, learning paths, books, interactive tutorials, and more.

Start Free Trial

No credit card required