Flutter插件flutter1的介绍与使用方法

flutter1 是一个在 Flutter 中用于基本算术运算的库，包括加法、减法、乘法和除法。

Flutter插件flutter1使用方法

要使用这个包，你需要在 pubspec.yaml 文件中添加 flutter1 作为依赖项。

dependencies:
  flutter:
    sdk: flutter
  flutter1: ^0.0.2

示例代码

以下是一个简单的示例，展示了如何使用 flutter1 插件进行基本算术运算：

import 'package:flutter/material.dart';
import 'package:flutter1/flutter1.dart'; // 导入 flutter1 包

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

class MyApp extends StatelessWidget {
  [@override](/user/override)
  Widget build(BuildContext context) {
    return MaterialApp(
      home: Scaffold(
        appBar: AppBar(
          title: Text('flutter1 插件示例'),
        ),
        body: ArithmeticPage(),
      ),
    );
  }
}

class ArithmeticPage extends StatefulWidget {
  [@override](/user/override)
  _ArithmeticPageState createState() => _ArithmeticPageState();
}

class _ArithmeticPageState extends State<ArithmeticPage> {
  double _num1 = 0;
  double _num2 = 0;
  String _result = '';

  void _add() {
    setState(() {
      _result = (calculateAddition(_num1, _num2)).toString();
    });
  }

  void _subtract() {
    setState(() {
      _result = (calculateSubtraction(_num1, _num2)).toString();
    });
  }

  void _multiply() {
    setState(() {
      _result = (calculateMultiplication(_num1, _num2)).toString();
    });
  }

  void _divide() {
    setState(() {
      _result = (calculateDivision(_num1, _num2)).toString();
    });
  }

  [@override](/user/override)
  Widget build(BuildContext context) {
    return Padding(
      padding: const EdgeInsets.all(16.0),
      child: Column(
        children: [
          TextField(
            keyboardType: TextInputType.number,
            onChanged: (value) {
              setState(() {
                _num1 = double.parse(value);
              });
            },
            decoration: InputDecoration(labelText: '输入第一个数字'),
          ),
          TextField(
            keyboardType: TextInputType.number,
            onChanged: (value) {
              setState(() {
                _num2 = double.parse(value);
              });
            },
            decoration: InputDecoration(labelText: '输入第二个数字'),
          ),
          SizedBox(height: 20),
          Row(
            mainAxisAlignment: MainAxisAlignment.spaceEvenly,
            children: [
              ElevatedButton(
                onPressed: _add,
                child: Text('+'),
              ),
              ElevatedButton(
                onPressed: _subtract,
                child: Text('-'),
              ),
              ElevatedButton(
                onPressed: _multiply,
                child: Text('*'),
              ),
              ElevatedButton(
                onPressed: () {
                  if (_num2 != 0) {
                    _divide();
                  } else {
                    setState(() {
                      _result = '除数不能为零';
                    });
                  }
                },
                child: Text('/'),
              ),
            ],
          ),
          SizedBox(height: 20),
          Text(
            '结果: $_result',
            style: TextStyle(fontSize: 20),
          )
        ],
      ),
    );
  }
}