Learning MIT App Inventor: A Hands-On Guide to Building Your Own Android Apps

Summary

Using multiple screens is useful in building bigger, more capable apps while keeping the features organized and usable. Screens are good at separating sets of features, but they are bad at sharing data. Using screens takes thought and careful design because you could make a few mistakes that you cannot undo.

For most simple cases, screens are not necessary, and you can fake screenlike functionality by making different sets of components visible and invisible on one screen. This is simpler for the programmer and the Android device, so it is recommended whenever possible.

Debugging is a critical set of skills that develop with programming experience. The Do It feature of App Inventor is a powerful tool for debugging, allowing the programmer ...