flutter how to set app drawer code example

Example 1: flutter drawer

Scaffold(
   drawer: Drawer(
      child: ListView(
        padding: EdgeInsets.zero,
        children: [
              DrawerHeader(
                   child: Text("Header")),
              ListTile(
                  title: Text("Home"))
        ]),
  ), 
);

Example 2: flutter navigation drawer

Widget _createHeader() {  return DrawerHeader(      margin: EdgeInsets.zero,      padding: EdgeInsets.zero,      decoration: BoxDecoration(          image: DecorationImage(              fit: BoxFit.fill,              image:  AssetImage('path/to/header_background.png'))),      child: Stack(children: <Widget>[        Positioned(            bottom: 12.0,            left: 16.0,            child: Text("Flutter Step-by-Step",                style: TextStyle(                    color: Colors.white,                    fontSize: 20.0,                    fontWeight: FontWeight.w500))),      ]));}