按下处理

main.dart

import 'package:flutter/material.dart';

void main() {
  runApp(MaterialApp(
    title: "按下处理",
    home: MyApp(),
  ));
}

class MyApp extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: Text("按下处理"),
      ),
      body: Center(
        child: MyButton(),
      ),
    );
  }
}

class MyButton extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return GestureDetector(
      onTap: () {
        final snackBar = SnackBar(
          content: Text("你已按下啦"),
        );
        Scaffold.of(context).showSnackBar(snackBar);
      },
      child: Container(
        padding: EdgeInsets.all(12.0),
        decoration: BoxDecoration(
          color: Theme.of(context).buttonColor,
          borderRadius: BorderRadius.circular(10.0),
        ),
        child: Text("测试按钮"),
      ),
    );
  }
}