Dart and Flutter

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Dart and Flutter

Flutter Dynamic expansion tile for group data

I needed a expansion tile for grouping data. I wanted to show item list like a folder structure on VS Code. Top parents ...
Dart and Flutter

Build error after upgrading Flutter

When I upgraded Flutter from 2.2.3 to 2.5.0 debug console showed a lot of build errors. I didn't understand what caused ...
Dart and Flutter

Flutter Add TextField widget dynamically

TextField requires TextEditingController that must be disposed. If we want to add TextField dynamically we also need to ...
Dart and Flutter

Flutter move screen up on the keyboard

Scaffold widget has persistentFooterButton property. When we assign widgets there they are hidden under the keyboard. re...
Dart and Flutter

Flutter – Retaining current view state

When using PageView and moving to another page and coming back to the original page, its state is clear. I just wanted t...
Dart and Flutter

Flutter Set value from parent widget

I wanted to call a function from the parent widget to clear the current value of the child widget. To do that, we need t...
Dart and Flutter

Extended widget doesn’t solve a RenderFlex overflowed error

I faced RenderFlex overflowed error while I was implementing Flutter app. I could eventually solve the problem by using ...
Dart and Flutter

Flutter – How to add label to Divider widget

Flutter offers Divider widget but it is very simple one and doesn't offer label. To add label text we need to use Row wi...
Dart and Flutter

Dart – how to assign int/String values to enum

Dart supports only the simplest case on enum and its index always starts from 0. However, we often want to assign values...
Dart and Flutter

Dart – Understanding Class Initialization Order

I wrote simple code to understand class initialization order. Dart offers late keyword to check null at runtime instead ...
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