Radio<T> class

Here is an example of Radio widgets wrapped in ListTiles, which is similar to what you could get with the RadioListTile widget.

The currently selected character is passed into RadioGroup.groupValue, which is maintained by the example's State. In this case, the first Radio will start off selected because _character is initialized to SingingCharacter.lafayette.

If the second radio button is pressed, the example's state is updated with setState, updating _character to SingingCharacter.jefferson. This causes the buttons to rebuild with the updated groupValue, and therefore the selection of the second button.

Requires one of its ancestors to be a Material widget.

To create a local project with this code sample, run:
flutter create --sample=material.Radio.1 mysample

Here is an example of how the you can override the default theme of a Radio with WidgetStateProperty.

In this example:

• The first Radio uses a custom fillColor that changes depending on whether the radio button is selected.
• The second Radio applies a different backgroundColor based on its selection state.
• The third Radio customizes the side property to display a different border color when selected or unselected.

To create a local project with this code sample, run:
flutter create --sample=material.Radio.2 mysample