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

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Designer

App building begins in the Designer. Here you create the user interface, or the “look and feel” of the app. You also add the components needed to receive input from the user, as well as the components needed to display output or information to the user. The Designer also is where you specify which nonvisible components the app will use, such as the dialer, GPS, or SMS. Notice that because we are in Designer, the Designer button in Figure 2.5 is slightly grayed out in the top-right corner of the screen. This button, along with the one next to it, labeled Blocks, indicates which editor you are using.

The left side of the screen features the Palette (see Figure 2.5), which, as the name implies, is the space for all the creation tools (the ...

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