simple flutter app

gistfile1.txt

import 'package:flutter/material.dart';
main (){
runApp(new materialApp(home: Home(), debugShowCheckedModeBanner: false),);
}

class Home extends StatefulWidget {
  @override
  State<StatefulWidget> createState() {
    // TODO: implement createState
    return new _Homestate();
  }
}

class _Homestate extends State<Home> {
  String name = '', newstate='';
  int x = 0;


  price (){
    setState(() {
      newstate="air plan";
    });
}
  price2 (){
    setState(() {
      newstate="bus ";
    });
        }
  void onclick(String text) {
    setState(() {
      name = text;
    });
  }
  void onclick2() {
    setState(() {
      name = "flatbutton";
    });
  }

  onClick() {
    setState(() {
    print(x++);
    });
  }



  @override
  Widget build(BuildContext context) {
    return Scaffold(

      floatingActionButton: FloatingActionButton(
        onPressed: onClick,
        child: Icon(Icons.add),
      ),
      bottomNavigationBar: BottomNavigationBar(
        items: [
          BottomNavigationBarItem(
              icon: Icon(Icons.airplanemode_active), title: Text('airplan ')),
          BottomNavigationBarItem(
              icon: Icon(Icons.add), title: Text('addairplan ')),
        ],
        type: BottomNavigationBarType.fixed,
        fixedColor: Colors.lightGreenAccent,
      ),
      appBar: AppBar(
        backgroundColor: Colors.deepPurpleAccent,
        title: Text('flutter 002'),
        textTheme: TextTheme(title: TextStyle(fontSize:25 )),
     //   automaticallyImplyLeading: bool.fromEnvironment("omas"),
    //    bottom: TabBar(tabs: null),

        leading: Text('هلا بالعيال '),
        actions: <Widget>[
          IconButton(icon: Icon(Icons.add_shopping_cart), onPressed: ()=>print("السلام عليكم ورحمة الله وبركاته "),)
        ],
      ),
      body: Container(
        padding: EdgeInsets.all(22.3),
        child: Column(
          children: <Widget>[
            Text("hallo $name "),
            RaisedButton(
                onPressed: () => onclick("this is parametert"),
                child: Text('click me omar')),
            Text("hallo $name "),
            RaisedButton.icon(
                onPressed: () => onclick("omarssssssssssssssssyhb"),
                icon: Icon(Icons.alarm),
                label: Text('thanks')),
            FlatButton(onPressed: onclick2, child: Text('dddar')),
             Text(" new state now is $newstate",style: TextStyle(fontSize: 40,color: Colors.deepPurpleAccent),),
            Text("  سبحان الله  $x",style: TextStyle(fontSize: 40,color: Colors.lightGreenAccent),),
             IconButton(  icon : Icon (Icons.all_inclusive), onPressed: price),
            IconButton(  icon : Icon (Icons.directions_bus), onPressed: price2)
          ],
        ),
      ),
    );
  }
}