Book Image

Google App Inventor

By : Ralph Roberts
Book Image

Google App Inventor

By: Ralph Roberts

Overview of this book

<center><iframe src="http://www.youtube.com/embed/UgRhYG_bvW8" width="500" height="315" frameborder="0"></iframe></center> <p>The number of mobile apps has grown exponentially in the last two years. If you want to join the crowd, Google’s App Inventor is the easiest and best tool for you to get started with. It is a tool to create Android phone apps and uses a graphical user interface, and drag and drop methods to create apps. It’s so simple that anyone can build an app.<br /><br />Learn how Google App Inventor eliminates the mystery around programming. It is a visual language, where we simply drag and drop blocks (graphic elements representing blocks of code) in various combinations to give us applications that run on our phones or other Android-based devices. No programming background is required. Playing with blocks has never been more fun!<br /><br />The emphasis is on creating apps that work and that you understand fully. The first part of the book gives you a sound foundation in the basics, and lots of tips on how to use App Inventor. The second part is all about creating complete apps ready for real world use. The book includes apps that communicate, use databases to remember, surf the Web and other networks, use GPS and various sensors on your phone, and let you write or play games.</p>
Table of Contents (19 chapters)
Google App Inventor
Credits
About the Author
About the Reviewers
www.PacktPub.com
Preface

Time for action designing a splash screen


Whether you have a static splash screen (nothing moving on it) or an animated one, you'll need multiple screens in your app. So, we first convert SpaceBall to more than one screen.

The best way to do this is to put everything we have now into a vertical arrangement (make it Fill Parent/Fill Parent). Rename the vertical arrange to Main (or Home or whatever you like for your first page name). Pull everything we now have into it so that it now looks like the following:

It's just easier—based on my experience—to use vertical arrangements for virtual "screens" or "pages." (These are not physical discrete screens like AI will get sooner or later, but for now they do the job). We can then primarily use horizontal arrangements for formatting on each "screen". Again, merely something I've found simplifies designing apps.

We navigate between screens by making one visible and the other not visible.

Now, let's design our splash screen.

First, collapse Main in...