颤振项目货币转换器

川长思鸟来 2024-03-16 17:35 28阅读 0赞

![8910d09aecc1130c4da01194696c5052.jpeg][]

[main.dart][]

import 'package:flutter/material.dart';
    import 'package:testapp/dollar_to_inr.dart';
    import 'package:testapp/inr_to_dollar.dart';
    
    void main() {
      runApp(MyApp());
    }
    
    class MyApp extends StatelessWidget {
      // This widget is the root of your application.
      @override
      Widget build(BuildContext context) {
        return MaterialApp(
          title: 'Flutter Demo',
          theme: ThemeData(
            // This is the theme of your application.
            //
            // Try running your application with "flutter run". You'll see the
            // application has a blue toolbar. Then, without quitting the app, try
            // changing the primarySwatch below to Colors.green and then invoke
            // "hot reload" (press "r" in the console where you ran "flutter run",
            // or simply save your changes to "hot reload" in a Flutter IDE).
            // Notice that the counter didn't reset back to zero; the application
            // is not restarted.
            primarySwatch: Colors.blue,
          ),
          home: CurrencyConverter(),
        );
      }
    }
    
    class CurrencyConverter extends StatelessWidget {
      const CurrencyConverter({super.key});
    
      @override
      Widget build(BuildContext context) {
        return Scaffold(
          appBar: AppBar(
            title: Text('Currency Converter'),
          ),
          body: Center(
            child: Column(
              //for the buttons to be in center
              mainAxisAlignment: MainAxisAlignment.center,
              children: [
                ElevatedButton(
                  onPressed: () {
                    //on pressing dollar to INr we should navigate
                    //to the dollar_to_inr widget
                    Navigator.of(context).push(
                        MaterialPageRoute(builder: (context) => DollarToINR()));
                  },
                  child: Text('Dollar To INR'),
                ),
                //create sized box for space between
                //two buttons
                const SizedBox(
                  height: 30,
                ),
                //another elevated button for inr to dollar
                ElevatedButton(
                  onPressed: () {
                    //on pressing this button
                    //we should naviaget to inr_to_dollar.dart
                    //widget
                    Navigator.of(context).push(
                        MaterialPageRoute(builder: (context) => InrToDollar()));
                  },
                  child: Text(
                    'INR to Dollar',
                  ),
                )
              ],
            ),
          ),
        );
      }
    }

import 'package:flutter/material.dart';
    import 'package:flutter/src/widgets/framework.dart';
    import 'package:flutter/src/widgets/placeholder.dart';
    
    class InrToDollar extends StatefulWidget {
      const InrToDollar({super.key});
    
      @override
      State<InrToDollar> createState() => _InrToDollarState();
    }
    
    class _InrToDollarState extends State<InrToDollar> {
      //create controller for inr
      TextEditingController inrController = TextEditingController();
      //creating the varibale to store the dollar value
      double dollar = 0.0;
      @override
      Widget build(BuildContext context) {
        return Scaffold(
          appBar: AppBar(
            title: Text('Inr to Dollar Converter'),
          ),
          body: Container(
            //give some padding
            padding: EdgeInsets.all(20),
            //here we need to create
            //one text filed to take input form user
            //and one button
            //so we will use here column widget
            child: Column(
              children: [
                TextField(
                  controller: inrController,
                  //some box around text field
                  decoration: const InputDecoration(
                    border: OutlineInputBorder(),
                    //labele text
                    labelText: 'Enter Inr',
                  ),
                ),
                //need some space between
                //textfield and button
                const SizedBox(
                  height: 30,
                ),
                //create convert button
                ElevatedButton(
                  onPressed: () {
                    //on pressing the convert we
                    //should convert the inr to dollar
                    setState(() {
                      dollar = double.parse(inrController.text) * 0.012;
                    });
                  },
                  child: Text("Convert"),
                ),
                //for some space between button and text
                SizedBox(
                  height: 30,
                ),
                //now we have to show dollar on screen
                //so we will use here text widget
                Text(
                  "Dollar : " + dollar.toString(),
                  //increse some font size
                  style: TextStyle(
                    fontSize: 30,
                  ),
                ),
              ],
            ),
          ),
        );
      }
    }

dollar\_to\_inr.dart

import 'package:flutter/src/widgets/framework.dart';
    import 'package:flutter/src/widgets/placeholder.dart';
    import 'package:flutter/material.dart';
    
    class DollarToINR extends StatefulWidget {
      const DollarToINR({super.key});
    
      @override
      State<DollarToINR> createState() => _DollarToINRState();
    }
    
    class _DollarToINRState extends State<DollarToINR> {
      //create controller for dollar
      TextEditingController dollarController = TextEditingController();
      //creating the varibale to store the inr value
      double inr = 0.0;
      @override
      Widget build(BuildContext context) {
        return Scaffold(
          appBar: AppBar(
            title: Text('Dollar to inr Converter'),
          ),
          body: Container(
            //give some padding
            padding: EdgeInsets.all(20),
            //here we need to create
            //one text filed to take input form user
            //and one button
            //so we will use here column widget
            child: Column(
              children: [
                TextField(
                  controller: dollarController,
                  //some box around text field
                  decoration: const InputDecoration(
                    border: OutlineInputBorder(),
                    //labele text
                    labelText: 'Enter Dollar',
                  ),
                ),
                //need some space between
                //textfield and button
                const SizedBox(
                  height: 30,
                ),
                //create convert button
                ElevatedButton(
                  onPressed: () {
                    //on pressing the convert we
                    //should convert the inr to dollar
                    setState(() {
                      inr = double.parse(dollarController.text) * 82.40;
                    });
                  },
                  child: Text("Convert"),
                ),
                //for some space between button and text
                SizedBox(
                  height: 30,
                ),
                //now we have to show dollar on screen
                //so we will use here text widget
                Text(
                  "Inr : " + inr.toString(),
                  //increse some font size
                  style: TextStyle(
                    fontSize: 30,
                  ),
                ),
              ],
            ),
          ),
        );

[8910d09aecc1130c4da01194696c5052.jpeg]: https://image.dandelioncloud.cn/pgy_files/images/2024/03/15/ddc24966dab14d0cbe5e491605eb165a.png
[main.dart]: https://zhifj.com