Clay

in Flutter, if we want to design a pop-up message box, we can use AlertDialog to do it.

“new” keyword

When I jumped into Flutter learning, what bothered me most at first was as stated in the title of this article: When should I use the new keyword? Some tutorial will add new for declaring variable, but some tutorials will not.

Recently, I have been studying how to build bottom buttons with overlapping shapes in Flutter as shown below:

When we developing a Flutter App, we named a temporary name in the first build. But in the process of development, perhaps changes in functions or changes in ideas, we may have to change the name of the App to a different one.

When we use Flutter for application development, we usually need some icons to used as button. Flutter provide some built-in icons for us, but even so, we still need more customize icons.

The code after the dart version upgrade needs to enable the so-called Null-Safety to compile. If the code disable Null-Safety, the following error will occur:

If you have a requirement for plotting a pie chart when you developing via Flutter, I can recommend a useful plotting package: fl_chart.