hyzp_ybqx/lib/pages/Login/LoginByName.dart

import 'dart:io';

import 'package:flutter/material.dart';
import 'package:hyzp_ybqx/components/UserAuthority.dart';
import '../../components/commonFun.dart';
import '../../widget/JdText.dart';
import '../../widget/JdButton.dart';

import '../../config/Config.dart';
import 'package:dio/dio.dart';
import 'package:fluttertoast/fluttertoast.dart';
import '../../services/Storage.dart';
import 'dart:convert';
import '../../components/EncryptUtil.dart';

import '../../services/EventBus.dart';
import '../../config/service_url.dart';
import 'package:flutter_screenutil/flutter_screenutil.dart';


class LoginByName extends StatefulWidget {
  LoginByName({Key key}) : super(key: key);

  _LoginPageState createState() => _LoginPageState();
}

class _LoginPageState extends State<LoginByName> {
  //监听登录页面销毁的事件
  dispose() {
    super.dispose();
    eventBus.fire(new UserEvent('登录成功...'));
  }

  bool bRemmberPW = false;

  @override
  void initState() {
    super.initState();
    // g_userInfo.username = 'the_user_03';
    // g_userInfo.password = '123456';
    // g_userInfo.password = 'ybhb1234';
    g_userInfo.username = '';
    g_userInfo.password = '';
    doInit();
  }

  doInit() async {
    bRemmberPW = await Storage.getBool('bRemmberPW');
    bRemmberPW = (null == bRemmberPW) ? false : bRemmberPW;
    print('bRemmberPW = $bRemmberPW');

    if (bRemmberPW) {
      //取出后需解密
      g_userInfo.username = await Storage.getString('username');
      g_userInfo.username = EncryptUtil.aesDecode(g_userInfo.username);
      g_userInfo.password = await Storage.getString('password');
      g_userInfo.password = EncryptUtil.aesDecode(g_userInfo.password);
    }
    setState(() {});
  }

  doLogin() async {
    //测试用，临时绕过登录处理
    // Navigator.pushNamed(context, '/tabs', arguments: g_iIndex);
    // return;

    if (bRemmberPW) {
      Storage.setBool('bRemmberPW', bRemmberPW);
      //加密保存
      Storage.setString('username', EncryptUtil.aesEncode(g_userInfo.username));
      Storage.setString('password', EncryptUtil.aesEncode(g_userInfo.password));
    } else {
      Storage.remove('username');
      Storage.remove('password');
    }

    var api = ServicePath.loginUrl;
    print(api);
    try {
      print('开始处理登录请求...');
      print('username = ${g_userInfo.username}');
      print('password = ${g_userInfo.password}');
      Response response;
      Dio dio = Dio();

      String random = RandomBit(6); //flutter （dart）生成N位随机数
      response = await dio.post(api, data: {
        "username": g_userInfo.username,
        "password": g_userInfo.password,
        "sign": GenerateMd5(APPkey + random),
        "random": random,
      });
      print('response = ${response.toString()}');
      //I/flutter ( 5242): {"ret":200,"data":{"is_login":true,"user_id":3,"token":"32EE57A0109A3D1D6590CFD3DEBA71820F77AB654093C1DE750347C88D1A41CF"},"msg":""}
      if (response.statusCode == 200) {
        // Storage.setString('userInfo', json.encode(response.data["userinfo"]));
        // //Navigator.pop(context);
        // Navigator.pushNamed(context, '/tabs', arguments: g_iIndex);

        //print('response.data["data"]["is_login"] = ${response.data["data"]["is_login"]}');
        //I/flutter ( 5242): response.data["data"]["is_login"] = true

        //{
        //     "ret": 200,
        //     "data": {
        //         "is_login": true,
        //         "user_id": 1,
        //         "token": "B93EC91FA2FE293B7077162D4527FC4BB228CD6C0A4F24A882B9A8BBE6C3FB47"
        //     },
        //     "msg": ""
        // }

        print('response = ${response}');
        //response = {"ret":406,"data":{},"msg":"非法请求：签名错误"}
        if (true == response.data["data"]["is_login"]) {
          print('登录成功');
          print('response.data = ${response.data}');
          //保存用户信息
          Storage.setString('userInfo', json.encode(response.data["data"]));
          g_userInfo.setUserInfo(theMapUserInfoRet: await getMapFromJson(response.data));
          //获取用户所属分组和相应权限
          getUserGroupAll().then((value) {
            //Navigator.pop(context);
            Navigator.pushNamed(context, '/tabs', arguments: g_iIndex);
          });
        } else {
          print('登录失败：${response.data["data"]}');
          Fluttertoast.showToast(
            msg: '登录失败：用户名或密码不正确。}',
            toastLength: Toast.LENGTH_LONG,
            gravity: ToastGravity.BOTTOM,
          );
          print('登录失败：${response.data["data"]}');
        }
        print('登录过程正常完成');
      } else {
        throw Exception('后端接口出现异常，请检测代码和服务器情况.........');
      }
    } catch (e) {
      print('登录过程异常...');
      print('ERROR:======>${e}');
      Fluttertoast.showToast(
        msg: 'ERROR:======>${e}',
        toastLength: Toast.LENGTH_SHORT,
        gravity: ToastGravity.CENTER,
      );
    }

    return;
  }

  @override
  Widget build(BuildContext context) {


    //FocusScope.of(context).requestFocus(FocusNode());
    //FocusScope.of(context).unfocus();

    return Scaffold(
      body: Container(
        padding: EdgeInsets.only(top: 20, bottom: 20, left: 20, right: 20),
        child: ListView(
          children: <Widget>[
            Center(
              child: Container(
                margin: EdgeInsets.only(top: 30),
                height: ScreenUtil().setWidth(160),
                width: ScreenUtil().setWidth(160),
                //child: Image.asset('assets/images/user.png', fit: BoxFit.cover),
                child: Image.asset('assets/images/ybsthbj.png', fit: BoxFit.fitHeight),
                // child: Image.network(
                //     'https://www.itying.com/images/flutter/list5.jpg',
                //     fit: BoxFit.cover),
              ),
            ),
            SizedBox(height: 30),
            JdText(
              height: ScreenUtil().setHeight(300),
              title: '账号：',
              text: "请输入账号",
              onChanged: (String value) {
                // print(value);
                g_userInfo.username = value;
              },
              endBtn: 'ClearBtn',
              controller: TextEditingController(text: g_userInfo.username),
            ),
            SizedBox(height: 10),
            JdText(
              height: ScreenUtil().setHeight(300),
              title: '密码：',
              text: "请输入密码",
              password: true,
              onChanged: (String value) {
                // print(value);
                g_userInfo.password = value;
              },
              endBtn: 'ShowHiddenBtn',
              controller: TextEditingController(text: g_userInfo.password),
            ),
            SizedBox(height: 10),
            Container(
              padding: EdgeInsets.all(ScreenUtil().setWidth(20)),
              child: Stack(
                children: <Widget>[
                  // Align(
                  //   alignment: Alignment.centerLeft,
                  //   child: InkWell(
                  //     onTap: () {
                  //       Navigator.pushNamed(context, '/forgotPassword');
                  //     },
                  //     child: Text('忘记密码'),
                  //   ),
                  // ),
                  Align(
                    alignment: Alignment.topRight,
                    child: InkWell(
                      onTap: () {
                        Navigator.pushNamed(context, '/registerFirst');
                      },
                      //child: Text('记住密码'),
                      child: Container(
                        alignment: Alignment(1, -1),
                        width: 150,
                        child: Row(
                          mainAxisAlignment: MainAxisAlignment.end,
                          crossAxisAlignment: CrossAxisAlignment.start,
                          children: [
                            Text('记住密码：'),
                            Container(
                              alignment: Alignment(1, -1),
                              height: 22,
                              width: 22,
                              child: Checkbox(
                                value: bRemmberPW,
                                activeColor: Colors.blue,
                                onChanged: (bool val) {
                                  this.setState(() {
                                    bRemmberPW = !bRemmberPW;
                                  });
                                  Storage.setBool('bRemmberPW', bRemmberPW);
                                },
                              ),
                            ),
                          ],
                        ),
                      ),
                    ),
                  ),
                  // Align(
                  //   alignment: Alignment.centerRight,
                  //   child: InkWell(
                  //     onTap: () {
                  //       Navigator.pushNamed(context, '/registerFirst');
                  //     },
                  //     child: Text(
                  //       '新用户注册',
                  //       style: TextStyle(
                  //           // 创建 paint 对象，设置 color 属性为想要的颜色
                  //           background: Paint()..color = Color.fromRGBO(218, 218, 218, 1)),
                  //     ),
                  //   ),
                  // ),
                ],
              ),
            ),
            SizedBox(height: 20),
            JdButton(
              height: ScreenUtil().setHeight(350),
              text: "登录",
              color: Colors.blueAccent,
              onTop: doLogin,
            )
          ],
        ),
      ),
    );
  }
}