import 'package:dio/dio.dart';
import 'package:flutter/material.dart';
import 'package:shared_preferences/shared_preferences.dart';
import 'package:zybdapp/oil_card/oil_card_home.dart';
import 'package:zybdapp/utils/server_url.dart';
import 'package:zybdapp/utils/toast_util.dart';
class LoginScreen extends StatelessWidget {
@override
Widget build(BuildContext context) {
return new MaterialApp(
title: '登录',
home: new _LoginScreen(),
routes: <String, WidgetBuilder>{
'/main': (BuildContext context) => new MainScreen(),
},
);
}
}
class _LoginScreen extends StatefulWidget {
@override
_LoginScreenState createState() => new _LoginScreenState();
}
class _LoginScreenState extends State<_LoginScreen> {
//手机号的控制器
TextEditingController phoneController = TextEditingController();
//密码的控制器
TextEditingController passController = TextEditingController();
// 光标跳转的输入框对象
FocusNode secondTextFieldNode = FocusNode();
// 加载进度条
Container loadingDialog;
// 显示加载进度条
showLoadingDialog() {
setState(() {
loadingDialog = new Container(
constraints: BoxConstraints.expand(),
color: Color(0x80000000),
child: new Center(
child: new CircularProgressIndicator(),
));
});
}
// 隐藏加载进度条
hideLoadingDialog() {
setState(() {
loadingDialog = new Container();
});
}
void login() async {
if (phoneController.text.length != 11) {
ToastUtil.toast("请输入11位手机号码");
} else if (passController.text.length == 0) {
ToastUtil.toast("密码不能为空");
} else {
showLoadingDialog();
Dio dio = new Dio();
dio.options.baseUrl = ServerUrl.base;
FormData formData = new FormData.from({
"mobile": phoneController.text,
"pwd": passController.text,
});
try {
Response response = await dio.post(ServerUrl.token, data: formData);
print(response.data.toString());
if (response.data["status"] == 0) {
String token = response.data["data"]["token"];
print(token);
if (token != null && token.trim() != "") {
SharedPreferences sp = await SharedPreferences.getInstance();
sp.setString("token", token);
Navigator.of(context).pushReplacementNamed('/main');
} else {
ToastUtil.toast("登录失败)");
}
} else {
ToastUtil.toast("账号或密码错误");
}
} catch (e) {
// The request was made and the server responded with a status code
// that falls out of the range of 2xx and is also not 304.
ToastUtil.toast("网络连接错误");
} finally {
hideLoadingDialog();
}
// phoneController.clear();
// passController.clear();
}
}
@override
void initState() {
super.initState();
hideLoadingDialog();
}
@override
Widget build(BuildContext context) {
return Scaffold(
body: new Stack(
alignment: const Alignment(0.0, -1.0),
children: [
// 背景图
new ConstrainedBox(
constraints: BoxConstraints.expand(),
child: new Image.asset(
"assets/images/login_bg.png",
fit: BoxFit.fill,
),
),
new Padding(
padding: new EdgeInsets.fromLTRB(38.0, 60.0, 38.0, 0.0),
// 滚动布局，输入法键盘打开时输入框可以上移
child: SingleChildScrollView(
child: new Column(
children: <Widget>[
// 顶部logo
new Center(
child: new Image.asset("assets/images/login_logo.png"),
),
// 欢迎文字
new Padding(
padding: new EdgeInsets.fromLTRB(0.0, 26.0, 0.0, 0.0),
child: new Center(
child: new Image.asset("assets/images/login_welcome.png"),
),
),
// 输入框卡片
new Padding(
padding: new EdgeInsets.fromLTRB(0.0, 28.0, 0.0, 0.0),
child: new Stack(
alignment: const Alignment(0.0, -1.0),
children: <Widget>[
new Image.asset("assets/images/login_rect.png"),
new Padding(
padding: new EdgeInsets.fromLTRB(20.0, 10.0, 20.0, 0.0),
child: new Column(
children: <Widget>[
new TextField(
// 控制器用于获取输入的内容
controller: phoneController,
// 键盘格式
keyboardType: TextInputType.number,
// 光标颜色
cursorColor: Colors.white,
// 键盘动作按钮，如“下一步”
textInputAction: TextInputAction.next,
// 键盘动作按钮点击之后执行的代码：
//光标切换到指定的输入框
onEditingComplete: () => FocusScope.of(context)
.requestFocus(secondTextFieldNode),
// 文本样式
style: new TextStyle(color: Colors.white),
decoration: InputDecoration(
// 输入框文本周边的距离
contentPadding: EdgeInsets.all(10.0),
// 输入框边框
border: InputBorder.none,
// 提示文字
hintText: '请输入账户名',
// 提示文本颜色
hintStyle:
new TextStyle(color: Colors.white54)),
autofocus: false, // 是否自动获取焦点
),
new Divider(
color: Colors.white,
),
new TextField(
controller: passController,
keyboardType: TextInputType.text,
cursorColor: Colors.white,
focusNode: secondTextFieldNode,
onEditingComplete: () {
login();
},
textInputAction: TextInputAction.done,
obscureText: true,
style: new TextStyle(color: Colors.white),
decoration: InputDecoration(
contentPadding: EdgeInsets.all(10.0),
border: InputBorder.none,
hintText: '请输入密码',
hintStyle:
new TextStyle(color: Colors.white54)),
autofocus: false,
),
new Divider(
color: Colors.white,
),
],
),
)
],
),
), // 登录按钮
new Padding(
padding: new EdgeInsets.fromLTRB(0.0, 50.0, 0.0, 0.0),
child: Row(
children: <Widget>[
new Expanded(
child: new RaisedButton(
onPressed: () {
login();
},
color: new Color(0xffFE9A18),
child: new Text(
"登录",
style: new TextStyle(
color: Colors.white, fontSize: 16.0),
),
)),
],
),
)
],
)),
),
loadingDialog
],
),
);
}
}
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