Gesture Detector

  Gesture Detector

import 'package:flutter/material.dart';

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

class MyApp extends StatelessWidget{
bool change=false;
  @override
  Widget build(BuildContext context) {
   return MaterialApp(
     home: Scaffold(
       appBar: AppBar(
         title: Text("Gesture Widget"),
         backgroundColor: Colors.purple.withOpacity(.50),
       ),
       body: Container(
          constraints: const BoxConstraints.expand(),
          decoration: BoxDecoration(
            border: Border.all(
              color: Colors.transparent,
            ),
          ),
          child: Column(
            //crossAxisAlignment: CrossAxisAlignment.center,
            //mainAxisAlignment: MainAxisAlignment.start,
            children: [
              Container(
                decoration: BoxDecoration(
                  border: Border.all(
                    color: Colors.transparent,
                  ),
                ),
                child: GestureDetector(
                  child: Container(
                    color: change ? Colors.pink : Colors.green,
                    width: 100,
                    height: 100,
                  ),
                  onTap:(){
                    setState((){
                      change=!change;
                    });
                  },
                ),
              ),
              
              
            ],
          ),
        ),
     ),
   );    💪 // MaterialApp
  }

}