1、新建名为NoSplashFactory 的class，将如下代码拷入：

import 'package:flutter/material.dart';

/*
 * 去除水波纹
*/
class NoSplashFactory extends InteractiveInkFeatureFactory {
  const NoSplashFactory();

  InteractiveInkFeature create({
    @required MaterialInkController controller,
    @required RenderBox referenceBox,
    @required Offset position,
    @required Color color,
    TextDirection textDirection,
    bool containedInkWell: false,
    RectCallback rectCallback,
    BorderRadius borderRadius,
    ShapeBorder customBorder,
    double radius,
    VoidCallback onRemoved,
  }) {
    return new NoSplash(
      controller: controller,
      referenceBox: referenceBox,
      color: color,
      onRemoved: onRemoved,
    );
  }
}

class NoSplash extends InteractiveInkFeature {
  NoSplash({
    @required MaterialInkController controller,
    @required RenderBox referenceBox,
    Color color,
    VoidCallback onRemoved,
  }) : assert(controller != null),
        assert(referenceBox != null),
        super(controller: controller, referenceBox: referenceBox, onRemoved: onRemoved) {
    controller.addInkFeature(this);
  }
  @override
  void paintFeature(Canvas canvas, Matrix4 transform) { }
}

2、在MyApp class中找到 MaterialApp 下的 ThemeData 加入以下内容
注：const NoSplashFactory()需要导包刚刚新建的class

highlightColor: Colors.transparent, 
splashFactory: const NoSplashFactory(),