Category: Programming Method

Demonstration app for using FirebaseDB in AppInventor 9

Demonstration app for using FirebaseDB in AppInventor

FirebaseDB provides for sharing between users all running the exact same app on their device. Read “What is FirebaseDB?” to learn more about FirebaseDB and what it does for your applications. This is a...

Rounding a number to a specific number of decimal places 13

Rounding a number to a specific number of decimal places

I was working on a small app that needed to round some numeric values. For example, given a number such as 123.456789, I wanted to round this off to two decimal places such as...

Aligning the text that appears in ListPicker 5

Aligning the text that appears in ListPicker

Readers post questions on the FB page or the blog. Sometimes I can answer them but sometimes I cannot answer them right away. For those that I cannot answer, I add the question to...

Can you “gray out” a button until data entry is complete? 5

Can you “gray out” a button until data entry is complete?

A reader asked  if it might be possible to “gray out” a button so that pressing it has no action, until appropriate data has been entered? The answer is “Yes, we can do this.”...

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