flutter 连点手势

import 'package:flutter/material.dart';

// 连点手势
class ContinuousTapGestureDetector extends GestureDetector {
  final Widget child;
  final ContinuousTapListener listener; // 连点监听者

  ContinuousTapGestureDetector({@required this.child,  @required this.listener}) : super(child: child, onTap: () {
    listener.onTapListening();
  });
}

class ContinuousTapListener {
  final int numberOfTapsRequired; // 需要连点的次数， 默认为 1 次
  final void Function() onContinuousTap; // 满足连点条件时的回调

  int _lastTapTime = 0; // 上一次点击的时间戳
  int _numberOfTapRecorded = 0; // 已记录的点击次数
  int _maxMillisecondsBetweenTwoTaps = 350;// 两次点击的最大时间间隔

  ContinuousTapListener({this.numberOfTapsRequired = 1, this.onContinuousTap});

  void onTapListening() {
    final now = DateTime.now().millisecondsSinceEpoch;
    if (_lastTapTime > 0 && now - _lastTapTime > _maxMillisecondsBetweenTwoTaps) {
      _resetRecord(time: now, count: 1);
    } else {
      _lastTapTime = now;
      _numberOfTapRecorded += 1;
      _checkAvailable();
    }
  }

  // 重置记录
  void _resetRecord({int time = 0, int count = 0}) {
    _lastTapTime = time;
    _numberOfTapRecorded = count;
  }

  // 验证是否满足预设条件，如果满足则执行回调函数
  void _checkAvailable() {
    if (_numberOfTapRecorded >= numberOfTapsRequired) {
      _resetRecord();
      if (onContinuousTap != null) {
        onContinuousTap();
      }
    }
  }
}

ContinuousTapGestureDetector(
	child: Text('点点点'),
	listener: ContinuousTapListener(
		numberOfTapsRequired: 8,
		onContinuousTap: () {
			Get.toNamed(AppPages.APP_ENV);
		},
	),
),