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How to implement a button that continuously changes color, as demonstrated in this video example:
The Designer View
Create a simple user interface with two buttons – one to start the color change and the other to stop the color changes. In the button properties, set the button shape to “oval”.
Drag a clock component into the Designer – the Clock will appear as a non-visible component at the bottom of the Viewer.
Blocks Code
Continue reading Changing an App Inventor button’s color continuously
Blockly is intended for use by software developers (rather than children learning to code) to generate Javascript:
Blockly was influenced by App Inventor, which in turn was influenced by Scratch, which in turn was influenced by StarLogo. As a result, children who are familiar with one have no difficulty moving to another.
via Blockly — Google Developers.
Actually, it can output Javascript, Python and Dart programs too 🙂
My App Inventor 2: Tutorial e-book – the fast and easy way to create Android apps – is now available from Amazon, Google Play Books, Apple Books via iTunes, and Kobo! And its very inexpensive – less than USD $3.00! Less than a latte!
Read it anyway you want!
Read on the e-book on the Kindle or Amazon Fire, read on Kindle for Android free apps, read on your PC or Mac, reading using the Google Play Books app on your phone or tablet, read on iPads or Mac OS X, or the Kobo reader software (all platforms!)
Depending on the vendor, you may download a free sample!
Apple Books via the iTunes Store: App Inventor 2 Tutorial – Edward Mitchell
MIT App Inventor Usage Surpasses 100,000 weekly – Google Docs.
Usage is climbing sharply! MIT suggests the usage trend indicates high usage in schools – with a drop in the summer and a very rapid expansion once school resumed in September.
This tutorial covers the simple changing of the color of a button, while the app is running. You may also set a component’s color by changing the color properties on the Properties list in the Designer.
A second tutorial will show how to implement the continuously changing color demonstrated in the video example. That will be posted next!
The Designer View
To demonstrate the “simple” version, create an app with this user interface:
That’s simple!
Each time the button is pressed, the color of the button will change.
Blocks Code
Continue reading Changing the color of a button (or other components) in App Inventor