how to show image in flutter

img.dart

import 'package:flutter/material.dart';

void main() => runApp(MyApp());

class MyApp extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return Container(
          padding: EdgeInsets.only(left: 10.0),
          child: Image.asset('assets/nama_gambar.format_gambar', width:70, height: 30),
        );
  }
}