down_double_tap.dart

import 'package:flutter/material.dart';

class Home extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return Scaffold(
      body: Center(
        child: Listener(
          onPointerDown: (_) {
            print('Pointer Down');
          },
          child: GestureDetector(
            onDoubleTap: () {
              print('Double Tap');
            },
            behavior: HitTestBehavior.opaque,
            child: Container(
              color: Colors.green.withOpacity(0.15),
              width: 200,
              height: 200,
            ),
          ),
        ),      
      ),
    );
  }
}

void main() {
  runApp(MaterialApp(home: Home()));
}