Download App Inventor 2 by David Wolber, Hal Abelson, Ellen Spertus, Liz Looney PDF

By David Wolber, Hal Abelson, Ellen Spertus, Liz Looney

Yes, you could create your individual apps for Android devices—and it’s effortless to do. This outstanding booklet introduces you to App Inventor 2, a strong visible instrument that shall we someone construct apps. research App Inventor fundamentals hands-on with step by step directions for construction greater than a dozen enjoyable tasks, together with a textual content answering desktop app, a quiz app, and an app for locating your parked car!

The moment half the ebook positive factors an Inventor’s handbook that will help you comprehend the basics of app construction and desktop technological know-how. App Inventor 2 makes a good textbook for novices and skilled builders alike.

  • Use programming blocks to construct apps—like engaged on a puzzle
  • Create customized multi-media quizzes and learn guides
  • Design video games and different apps with second photos and animation
  • Make a customized journey of your urban, tuition, or workplace
  • Control a LEGO® MINDSTORMS® NXT robotic along with your phone
  • Build location-aware apps via operating together with your phone’s sensors
  • Explore apps that comprise details from the Web

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Extra resources for App Inventor 2

Example text

The app now knows where to draw (x,y), but we still need to specify how big the circle should be 4. Now, you’ll need to specify the radius, r, of the circle to draw. The radius is measured in pixels, which is the tiniest dot that can be drawn on a device’s screen. For now, set it to 5: click in a blank area of the screen, type 5 and then press Return 28 Chapter 2: PaintPot (this will create a number block automatically), and then plug that into the r socket. When you do, the yellow box in the bottom-left corner will return to 0 because all the sockets are now filled.

Ellen first worked with sprites when she attended a computer camp in the early 1980s and programmed a TI 99/4. Her work on sprites and MoleMash was motivated by double nostalgia—for both the computers and games of her childhood. What You’ll Build For the MoleMash app shown in Figure 3-1, you’ll implement the following functionality: • A mole pops up at random locations on the screen, moving once every second. • Tapping the mole causes the device to Figure 3-1. The MoleMash user interface vibrate, increment a display of “hits” (increasing it by one), and move the mole immediately to a new location.

You can now stop 1 There are many QR Code scanners for Android. If you don’t have one on your device, go to the Play Store and install one. Sharing the App 17 the Companion app or unplug your device from the computer, and your new packaged application will still be there. It’s important to understand that this means your packaged app is now separate from the project on App Inventor. You can do more work on the project in App Inventor by connecting the device with the AI Companion as before. But that won’t change the packaged app that is now installed on your device.

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