Forms and TextFields in Flutter

Forms and TextFields in Flutter — a practical guide to Flutter Forms TextFields with clear examples you can reuse in real projects.

Flutter Tutorial Series (43/107). Prefer one article? Read the complete Flutter tutorial.

Short description

Use a GlobalKey<FormState> to validate and save form fields together.

Form sketch

final _formKey = GlobalKey<FormState>();
Form(
  key: _formKey,
  child: TextFormField(
    decoration: const InputDecoration(labelText: 'Email'),
    validator: (v) => (v == null || v.isEmpty) ? 'Required' : null,
  ),
);