import 'package:flutter/material.dart';
void main() {
  runApp(MaterialApp(
    home: MyApp(),
  ));
}
class MyApp extends StatefulWidget {
  @override
  _State createState() => _State();
}
class _State extends State<MyApp> {
  void showBottom() {
    showModalBottomSheet<void>(
        context: context,
        builder: (BuildContext context) {
          return Container(
            padding: EdgeInsets.all(15.0),
            child: Row(
              mainAxisAlignment: MainAxisAlignment.spaceBetween,
              children: <Widget>[
                Text('Welcome To Tutor Joes'),
                FlatButton(
                  color: Colors.red,
                  child: Text(
                    'OK',
                    style: TextStyle(color: Colors.white),
                  ),
                  onPressed: () {
                    Navigator.pop(context);
                  },
                ),
              ],
            ),
          );
        });
  }
  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: Text('Bottom Sheet'),
      ),
      body: Center(
        child: RaisedButton(
          child: Text(
            'Click Me',
            style: TextStyle(color: Colors.white),
          ),
          color: Colors.blue,
          onPressed: showBottom,
        ),
      ),
    );
  }
}