在本教程中，我將向您展示如何在 Flutter 和 Android studio 中制作漂亮的登錄表單，
您將學習如何制作背景圖像、如何在 Flutter中制作圓形按鈕、如何添加一些不透明度以及如何添加圖標到您的文本字段。

import 'dart:ffi';import 'package:flutter/material.dart';void main() => runApp(MaterialApp(home: LoginApp(), ));class LoginApp extends StatelessWidget{@overrideWidget build(BuildContext context) {return Scaffold(body: Stack(children: <Widget>[Container(decoration: new BoxDecoration(image: new DecorationImage(image: NetworkImage('https://images.unsplash.com/photo-1439853949127-fa647821eba0?ixlib=rb-1.2.1&ixid=eyJhcHBfaWQiOjEyMDd9&auto=format&fit=crop&w=634&q=80'),fit: BoxFit.fill),),),Opacity(opacity: 0.5,child: Container(decoration: new BoxDecoration(gradient: LinearGradient(begin: Alignment.topRight,end: Alignment.bottomLeft,colors: [Colors.blue,Colors.purpleAccent],),),),),Center(child: Column(mainAxisAlignment: MainAxisAlignment.center,children: <Widget>[Text('Login',style: TextStyle(fontSize: 60.0,letterSpacing: 2.0,color: Colors.white,fontStyle: FontStyle.italic,),),Padding(padding: EdgeInsets.symmetric(horizontal: 35.0, vertical: 22.0),child: TextField(decoration: InputDecoration(filled: true,fillColor: Colors.white,border: InputBorder.none,hintText: 'User Email',contentPadding: EdgeInsets.all(16.0),prefixIcon: Icon(Icons.email,color: Colors.blue,)),keyboardType: TextInputType.emailAddress,),),Padding(padding: EdgeInsets.symmetric(horizontal: 35.0, vertical: 12.0),child: TextField(decoration: InputDecoration(filled: true,fillColor: Colors.white,border: InputBorder.none,hintText: 'User Password',contentPadding: EdgeInsets.all(16.0),prefixIcon: Icon(Icons.lock,color: Colors.blue,)),obscureText: true,),),Text("Forget your password ?", style: TextStyle(color: Colors.white),),SizedBox(height: 40.0,),RaisedButton(onPressed: (){},shape: StadiumBorder(),color: Colors.blueAccent,textColor: Colors.white,child: Text("Login",style: TextStyle(fontSize: 22.0),),padding: EdgeInsets.symmetric(vertical: 12.0,horizontal: 80.0),elevation: 0.0,)],),)],),);}}

總結

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