Text Area Layout

import 'package:flutter/material.dart';

class TextareaExample extends StatelessWidget {

  final _formKey = GlobalKey<FormState>();
  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: Text('Textarea Sample'),
      ),
      body: Form(
        key: _formKey,
        child: Padding(
          padding: const EdgeInsets.all(2.0),
          child: Column(
            children: <Widget>[
              TextFormField(
                validator: (value) {
                  if (value.isEmpty) {
                    return 'Nama wajib diisi';
                  }
                  return null;
                },
                keyboardType: TextInputType.multiline,
                maxLines: 3,
                // focusNode: _nameFocus,
                decoration: const InputDecoration(
                  icon: Icon(Icons.location_city),
                  // labelText: 'Alamat *',
                  hintText: 'Masukan alamat Anda',
                ),
              ),
            ],
          ),
        ),
      ),
      floatingActionButton: FloatingActionButton(
        child: Icon(Icons.save),
        onPressed: () {
          // Validate returns true if the form is valid, or false
          // otherwise.
          if (_formKey.currentState.validate()) {
            // If the form is valid, display a Snackbar.
            Scaffold.of(context)
                .showSnackBar(SnackBar(content: Text('Processing Data')));
          }
        },
      ),
    );
  }
}