one_border_radius.dart

import 'package:flutter/material.dart';

class OneBorderContainer extends StatefulWidget {
  @override
  _OneBorderState createState() => _OneBorderState();
}

class _OneBorderState extends State<OneBorderContainer> {
  @override
  Widget build(BuildContext context) {
    var topBar = Padding(
        padding: EdgeInsets.only(top: 15.0, left: 10.0),
        child: Row(
          mainAxisAlignment: MainAxisAlignment.spaceBetween,
          children: <Widget>[
            IconButton(
              icon: Icon(Icons.arrow_back_ios),
              color: Colors.white,
              onPressed: () {},
            ),
            Container(
                width: 125.0,
                child: Row(
                  mainAxisAlignment: MainAxisAlignment.spaceBetween,
                  children: <Widget>[
                    IconButton(
                      icon: Icon(Icons.filter_list),
                      color: Colors.white,
                      onPressed: () {},
                    ),
                    IconButton(
                      icon: Icon(Icons.menu),
                      color: Colors.white,
                      onPressed: () {},
                    ),
                  ],
                ))
          ],
        ));
    var mainTitle = Padding(
      padding: EdgeInsets.only(left: 40.0),
      child: Row(
        children: <Widget>[
          Text(
            'Healthy',
            style: TextStyle(
              fontFamily: 'Montserrat',
              color: Colors.white,
              fontWeight: FontWeight.bold,
              fontSize: 25.0,
            ),
          ),
          SizedBox(width: 10.0),
          Text(
            'Food',
            style: TextStyle(
              fontFamily: 'Montserrat',
              color: Colors.white,
              fontSize: 25.0,
            ),
          )
        ],
      ),
    );
    return Scaffold(
        backgroundColor: Color(0xFF21BFBD),
        body: SafeArea(
          bottom: false,
          child: ListView(
            padding: EdgeInsets.only(bottom: 0.0),
            children: <Widget>[
              topBar,
              SizedBox(height: 25.0),
              mainTitle,
              SizedBox(height: 40.0),
              Container(
                height: MediaQuery.of(context).size.height - 185.0,
                decoration: BoxDecoration(
                  color: Colors.white,
                  borderRadius: BorderRadius.only(
                    topLeft: Radius.circular(50.0),
                  ),
                ),
              )
            ],
          ),
        ));
  }
}