How to use onTap or onPressed in PopupMenuItem

Question

How can we implement use of onTap or onPressed in PopupMenuItem

Here is my code:

actions: <Widget>[
  PopupMenuButton(
    icon: Icon(Icons.settings),
    itemBuilder: (context) => [
      PopupMenuItem(
        child: Text("Settings"),
      ),
      PopupMenuItem(
        child: Text("Flutter.io"),
      ),
      PopupMenuItem(
        child: Text("Google.com"),
      ),
    ],
  ),
]

I want to navigate to SettingPage() on tapping or clicking Settings PopupMenuItem.
I am getting this error even after following a solution mentioned below and even after importing dart:js

Error: Not found: 'dart:js'
import 'dart:js';

Here are my dependencies:

import 'package:bfdi_app/Profile/editProfile.dart';
import 'package:bfdi_app/models/user.dart';
import 'package:bfdi_app/services/collection.dart';
import 'package:bfdi_app/settings.dart';
import 'package:cached_network_image/cached_network_image.dart';
import 'package:flutter/material.dart';
import 'dart:js';

Answer 1

Just add this to your PopupMenuButton:

onSelected: (result) {
    if (result == 0) {
        Navigator.push(
            context,
            MaterialPageRoute(builder: (context) => SettingPage()),
        );
    }
},

And change your setting button to:

PopupMenuItem(
    child: Text("Settings"),
    value: 0,
),

Answer 2

There is a property called onSelected, you should use it, it handles onTap event.

PopupMenuButton(
  icon: Icon(Icons.settings),
  onSelected: (newValue) { // add this property
    setState(() {
      _value = newValue; // it gives the value which is selected
    });
  },
  itemBuilder: (context) => [
    PopupMenuItem(
      child: Text("Settings"),
      value: 0,
    ),
    PopupMenuItem(
      child: Text("Flutter.io"),
      value: 1,
    ),
    PopupMenuItem(
      child: Text("Google.com"),
      value: 2,
    ),
  ],
)

Answer 3

There is now an onTap() for PopupMenuItem.

      PopupMenuButton(
        itemBuilder: (context) => [
          PopupMenuItem(
            child: Text("tap me"),
            onTap: () => print("TAP"),
          )
        ],
      ),

Answer 4

I faced similar issues while navigating the screen using pop up menu button and I solve the issues by putting this method inside the onTap callback of PopupMenuItem:

    onTap: (){
WidgetsBinding.instance!.addPostFrameCallback((_) {
                      Navigator.push(
                        context,
                        MaterialPageRoute(
                          builder: (context) {
                            return ScreenName();
                          },
                        ),
                      );
                    });
}

Answer 5

-Edited based on comment-

That's it :

class MyHomePage extends StatefulWidget {
  @override
  _MyHomePageState createState() => _MyHomePageState();
}

class _MyHomePageState extends State<MyHomePage> {
  var items = [{'name':'Settings','value':0}, {'name':'Flutter.io','value':1}, {'name':'Google.com',,'value':2}];

  @override
  Widget build(BuildContext context) {
    return Scaffold(
        body: Center(
      child: PopupMenuButton(
              onSelected: (x) {
           if(x==0){
                Navigator.push(
                     context,
                     MaterialPageRoute(builder: (context) => SettingPage()), );}
              },
              icon: Icon(Icons.settings),
              itemBuilder: (context) => items
                  .map<PopupMenuItem>((element) => PopupMenuItem(
                        child: Text(element['name]),
                        value: element['value'],
                      ))
                  .toList()),


    ));
  }
}