GridView.custom constructor example

GridViewCustom.dart

import 'package:flutter/material.dart';

void main() => runApp(MyApp());

class MyApp extends StatelessWidget {
  // This widget is the root of your application.
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      title: 'Flutter Demo',
      theme: ThemeData(
        primarySwatch: Colors.blue,
      ),
      home: MyHomePage(),
    );
  }
}

class MyHomePage extends StatefulWidget {
  MyHomePage({Key key}) : super(key: key);

  @override
  _MyHomePageState createState() => _MyHomePageState();
}

class _MyHomePageState extends State<MyHomePage> {
  @override
  Widget build(BuildContext context) {
    return Scaffold(
        body: Center(
            child: GridView.custom(
      primary: false,
      padding: const EdgeInsets.all(20),
      gridDelegate: SliverGridDelegateWithFixedCrossAxisCount(
          crossAxisSpacing: 10, mainAxisSpacing: 10, crossAxisCount: 2),
      childrenDelegate: SliverChildListDelegate(<Widget>[
        Container(
          padding: const EdgeInsets.all(8),
          child: const Text('He\'d have you all unravel at the'),
          color: Colors.teal[100],
        ),
        Container(
          padding: const EdgeInsets.all(8),
          child: const Text('Heed not the rabble'),
          color: Colors.teal[200],
        ),
        Container(
          padding: const EdgeInsets.all(8),
          child: const Text('Sound of screams but the'),
          color: Colors.teal[300],
        ),
        Container(
          padding: const EdgeInsets.all(8),
          child: const Text('Who scream'),
          color: Colors.teal[400],
        ),
        Container(
          padding: const EdgeInsets.all(8),
          child: const Text('Revolution is coming...'),
          color: Colors.teal[500],
        ),
        Container(
          padding: const EdgeInsets.all(8),
          child: const Text('Revolution, they...'),
          color: Colors.teal[600],
        ),
      ]),
    )));
  }
}