Form tutorial episode 9 Dropdown widget
Episode 9 introduces the DropdownButton and DropdownButtonFormField widgets, one of Flutter’s simplest and most flexible ways to let users choose a single value from a predefined list.
In this episode, you’ll build a dropdown using a list of strings (Option 1 through Option 4) and convert that list into dynamic DropdownMenuItem widgets using the .map() function.
Building the dropdown
You’ll start with a simple list of strings and transform it into a list of menu items that the DropdownButton can display. Flutter’s DropdownButton shows the currently selected value and opens a menu when tapped, allowing the user to pick another option.
Managing the selected value
A local state variable will store the user’s selection and update the UI whenever a new option is chosen. This ensures the dropdown always reflects the current choice and provides immediate feedback to the user.
By the end of this episode
You’ll know how to build a fully functional dropdown, generate menu items dynamically, and display the selected value in a clean, user‑friendly way.
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