How can I change the height of a DropdownButton in flutter. I have tried to use Padding and SizedBox but none is realy working. SizedBox just increases the container size while the DropdownButton i...

I am trying to create a dropdown button in Flutter. I am getting a List from my database then I pass the list to my dropdownButton everything works the data is shown as intended but when I choose a...

I have a dropdown button which works fine, but when I try to set a default value it will fail with the following error: 'package:flutter/src/material/dropdown.dart': Failed assertion: line 620 ...

I want to reset value at DropdownButtonFormField, value is changed to null, but DropdownButtonFormField doesn't change. Where is the problem? If I have used DropdownButton it was changing value pro...

I'm in the process of learning GetX state management and stumble upon the DropdownButton widget. How do I update the selected value with the selected value cannot be observed. Here is my DropdownBu...

Im trying to implement a DropdownButton that can separate specific items from each other with a title (see desired output on image below, the titles are in green) Like in the example I would lik...

In the following example the DrowdownButton contains a grey background (defined by the container box decoration) with white text. The menu items therefore all have white text by default. However th...

Im working on a flutter project where i pass an array of objects (List> array) to the stream-builder from my bloc. If i print the object it prints nicely, but when i try to map them out in the Drop...

I want to Customise DropDownButton, so that it does not render the content of DropdownItem. Instead it should render my Custom layout/widget before and after selecting an item from DropDown. In sim...

DropdownButton Value does not update even after selecting different items. If default value is null then error message is shown and if I pass any default value (not null) then it never changes to...

[dart] Invalid constant value. [dart] Arguments of a constant creation must be constant expressions. I want to make DropdownButton , but errorText only accept constant variable. [dart] Invalid co...