sample code to create Android-like dropdown menu in flutter

custom_popup_menu.dart

import 'package:flutter/material.dart';

class CustomPopupMenu {
  CustomPopupMenu({this.title, this.icon});

  String title;
  IconData icon;
}

home_page.dart

//initialise menus
List<CustomPopupMenu> choices = <CustomPopupMenu>[
  CustomPopupMenu(title: 'Home', icon: Icons.home),
  CustomPopupMenu(title: 'Profile', icon: Icons.person),
  CustomPopupMenu(title: 'Notifications', icon: Icons.notification),
  CustomPopupMenu(title: 'Settings', icon: Icons.settings),
];

//handle onclick on custom menu items
void _select(CustomPopupMenu choice) {
    int choicePosition = choices.indexOf(choice);

    switch (choicePosition) {
      case 0:
        print('Home');
        //to home page
        break;
      case 1:
        print('profile');
        //to profile page
        break;
      case 2:
        print('notification');
        //to notification page
        break;
      case 3:
        print('settings');
//to seetings page
        break;
    }
  }

//widget for custom dropdown menu
   PopupMenuButton<CustomPopupMenu>(
            elevation: 2,
            icon: Icon(Icons.menu),
            onCanceled: () {
              print('You have not chossed anything');
            },
            tooltip: 'popup menu',
            onSelected: _select,
            itemBuilder: (BuildContext context) {
              return choices.map((CustomPopupMenu choice) {
                return PopupMenuItem<CustomPopupMenu>(
                  value: choice,
                  child: Row(
                    children: <Widget>[
                      Icon(choice.icon),
                      SizedBox(
                        width: 8,
                      ),
                      Text(choice.title),
                    ],
                  ),
                );
              }).toList();
            },
          )