Mobile App Development – Flutter

Lesson 25: Forms

final _formKey = GlobalKey();

Form(
  key: _formKey,
  child: Column(
    children: [
      TextFormField(
        decoration: InputDecoration(labelText: 'Enter your name'),
        validator: (value) {
          if (value!.isEmpty) return 'Name is required';
          return null;
        },
      ),
      ElevatedButton(
        onPressed: () {
          if (_formKey.currentState!.validate()) {
            print('Form is valid');
          }
        },
        child: Text('Submit'),
      ),
    ],
  ),
)