No MediaQuery Widget ancestor found – Flutter Problem Solution



Flutter No MediaQuery Widget Problem

In this tutorial you learn, how to solve the Flutter No MediaQuery Widget ancestor found. if your app Material app widget run this way show this error:

import 'package:flutter/cupertino.dart';
import 'package:flutter/material.dart';

void main() {
  runApp(MyApp());
}

class MyApp extends StatelessWidget {
  const MyApp({Key? key}) : super(key: key);

  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      home: Scaffold(
        appBar: AppBar(),
        body: Center(
          child: Column(
            crossAxisAlignment: CrossAxisAlignment.center,
            mainAxisAlignment: MainAxisAlignment.center,
            children: [
              Text("Device Width ${MediaQuery.of(context).size.width}"),
              Text("Device Height ${MediaQuery.of(context).size.height}"),
            ],
          ),
        ),
    
    );
  }
}
No media Query Widget
no media query

Now solve your MediaQuery.of(context) function. try this code below: Must Use Home() or the name Class wraps your widget then work it.

import 'package:flutter/cupertino.dart';
import 'package:flutter/material.dart';

void main() {
  runApp(MyApp());
}

class MyApp extends StatelessWidget {
  const MyApp({Key? key}) : super(key: key);

  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      home: Home(),
    );
  }
}

class Home extends StatelessWidget {
  const Home({Key? key}) : super(key: key);

  @override
  Widget build(BuildContext context) {
    return  Scaffold(
      appBar: AppBar(),
      body: Center(
        child: Column(
          crossAxisAlignment: CrossAxisAlignment.center,
          mainAxisAlignment: MainAxisAlignment.center,
          children: [
            Text("Device Width ${MediaQuery.of(context).size.width}"),
            Text("Device Height ${MediaQuery.of(context).size.height}"),
          ],
        ),
      ),
    );
  }
}

No media query widget ancestor was found Solution

Flutter No MediaQuery
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