Get Selected Item From Listview In Flutter Android App

import 'package:flutter/material.dart';
void main() => runApp(MyApp());
class MyApp extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      debugShowCheckedModeBanner: false,
        home: Scaffold(
            appBar: AppBar(title: Text('Get ListView Selected Item')),
            body: Center(
                child: ListViewWidget()
            )
        )
    );
  }
}

class ListViewWidget extends StatefulWidget {
  ListViewState createState() => ListViewState();
}
class ListViewState extends State {
  List<String> items = [
    'Apple',
    'Banana',
    'Mango',
    'Orange',
  ];

  getListViewItems(String item){
    showDialog(
      context: context,
      builder: (BuildContext context) {
        return AlertDialog(
          title: new Text(item),
          actions: <Widget>[
            FlatButton(
              child: new Text("OK"),
              onPressed: () {
                Navigator.of(context).pop();
              },
            ),
          ],
        );
      },
    );
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
        body: Center(
          child: ListView(
            children: items
                .map((data) => ListTile(
                title: Text(data),
                onTap: ()=>{
                  getListViewItems(data)
                }
            ))
                .toList(),
          ),
        )
    );
  }
}