Dialog

FilledButton(
  onPressed: () {
    showDialog(
      context: context,
      builder: (context) {
        return Dialog(  // must wrap with Dialog
          child: GoalForm(),  // Custom Container
        );
      },
    );
  },
  child: Text("HI"),
)
Dart
복사

Reference

Flutter Alert Dialog to Custom Dialog

Discuss about Adding Alert dialog to you app and how to customize it to show as a full-screen dialog.

https://medium.com/codechai/flutter-alert-dialog-to-custom-dialog-966195157da8