flutter achieve page jump two routes

1 . Anonymous routing push, directly 
void nextPage () {the async 
　　Final Result = the await Navigator.push (context, MaterialPageRoute (Builder: (BuildContext context) { 
　　　　return NextPage ( "Pass the params to Next Page" ); // Constructor transfer parameter 
　　})); 
　　// return result page result 
}

Navigator.pop (context, "return value to last page"); // page return

2. Name the route pushNamed, first register and then use

void main () => runApp ( MyApp ()); // call the function of writing a single line 
class the extends StatelessWidget the MyApp { 
  @override 
  the Widget Build (BuildContext context) { 
    return MaterialApp ( 
      title: "My the App the Title", 
      Theme: ThemeData (primaryColor: Colors.green), 
      // Home: RandomWord (), set the way home a 
      initialRoute: "home_route", // Home settings way two 
      routes: {// routing registry 
        "next_page": (BuildContext context) { 
          return NextPage (ModalRoute .of (context) .settings.arguments); 
        }, 
        "home_route": (BuildContext context) => RandomWord (), 
      }, 
// onGenerateRoute: // page interception process 
// onUnknownRoute: // page jump error 
    );
  }
}

void nextPage() async{
  final result = await Navigator.pushNamed(context, "next_page",arguments: "pass params to next page");
  //result页面返回结果
}

// next_page acquisition parameters on a page transfer from the method: ModalRoute.of (context) .settings.arguments