logistics-client-flutter/lib/pages/my_page.dart

import 'package:flutter/material.dart';
import 'package:flutter_screenutil/flutter_screenutil.dart';
import 'my_page/revise_password_page.dart';
import 'package:flutter_picker/flutter_picker.dart';
import '../util/bluetooth_utils.dart';
import '../showDialog.dart';
import '../login_page.dart';
import '../util/api.dart';
import '../util/models.dart';
import '../util/session.dart';
import '../util/util.dart';

class MyPage extends StatefulWidget {
  final Widget child;

  MyPage({
    Key key,
    this.child
  }): super(key: key);

  _MyPageState createState() => _MyPageState();
}

class _MyPageState extends State < MyPage > with AutomaticKeepAliveClientMixin {

  bool check = false;
  String _siteName = "请选择站点";
  List < String > stationList = [];
  Station stationObj;
  String name = '物流';
  BluetoothUtils bluetooth = BluetoothUtils();
  List < BtInfoObj > btList = [];
  Set btSet = Set();
  bool btLinkStatus = false;
  List printTypeList = ["全部", "发件方", "收件方", "物流公司", "货物", "货物外", "不打印"];
  static
  var printTypeMap = {
    "全部": "1",
    "发件方": "2",
    "收件方": "3",
    "物流公司": "4",
    "货物": "5",
    "货物外": "6",
    "不打印": "7",
  };
  static
  var printTypeMapSecond = {
    "1": "全部",
    "2": "发件方",
    "3": "收件方",
    "4": "物流公司",
    "5": "货物",
    "6": "货物外",
    "7": "不打印",
  };
  String printType = '全部';
  @override
  bool get wantKeepAlive => true;

  @override
  void initState() {
    btList.clear();
    btSet.clear();
    super.initState();
    getStationList().then((resp) {
      if (isNotError(context, resp) && this.mounted) {
        stationObj = Station.fromJson(resp.data);
        getKey('stationId').then((value) {
          List < String > tempList = [];
          for (int i = 0; i < stationObj.data.length; i++) {
            tempList.add(stationObj.data[i].name.toString());
            if (stationObj.data[i].id.toString() == value) {
              _siteName = stationObj.data[i].name.toString();
            }
          }
          getKey('nickName').then((value) {
            setState(() {
              stationList = tempList;
              name = value;
            });
          });
          getKey('printType').then((value) {
            printType = printTypeMapSecond[value];
          });
        });
      }
    });

    bluetooth.getEchannel().receiveBroadcastStream().listen(onEvent, onError: onError);
    bluetooth.isEnableBluetooth().then((value){//如果蓝牙打开的情况下去拿缓存的蓝牙相关数据
       if(value){
          getKey('check').then((value) {
            if (value == null) {
              setState(() {
                check = false;
              });
            } else if (value == 'false') {
              setState(() {
                check = false;
              });
            } else if (value == 'true') {
              setState(() {
                check = true;
              });
            }
          });
          getKey('btList').then((value) {
            if (value != '' && check == true) {
              List tempList = [];
              for (int i = 0; i < 999; i++) {
                if (value.indexOf('&') != -1) {
                  int index = value.indexOf('&');
                  tempList.add(value.substring(0, index));
                  value = value.substring(index + 1, value.length);
                } else {
                  break;
                }
              }
              getKey('checkedBt').then((value){
                for (int i = 0; i < tempList.length; i++) {
                  BtInfoObj tempObj;
                  if(value!=null && value==i.toString()){
                    tempObj = BtInfoObj(name: tempList[i], showLoadStauts: false, connectStatus: true);
                  }else{
                    tempObj = BtInfoObj(name: tempList[i], showLoadStauts: false, connectStatus: false);
                  }
                  setState(() {
                    btList.add(tempObj);
                  });
                }
              });
            }
          });
       }
      });
   }


  onEvent(Object obj) {
    print('进入onEvent回调${obj}');
    if (obj.toString().indexOf('||') != -1) { //过滤开始搜索和结束搜索
      if(obj.toString().indexOf('DISCAONNECTED')!=-1){//当上一个连接断开后，将连接的蓝牙动画状态关闭
      print('**************DISCAONNECTED***************');
          for(int i=0;i<btList.length;i++){
            print(btList[i].connectStatus);
            if(btList[i].connectStatus==true){
              setState(() {
                 btList[i].showLoadStauts = false;
                  btLinkStatus = true;
              });
              setKey('checkedBt', i);
            }
           }
            String tempStr = '';
            for (int i = 0; i < btList.length; i++) {
              tempStr += '${btList[i].name}&';
            }
            setKey('btList', tempStr);
            return;
      }else
      if(obj.toString().indexOf('CONNECTED')!=-1){//连接回调成功，将连接状态改为蓝色，单扔显示连接动画
        setState(() {
            for(int i=0;i<btList.length;i++){
              if(obj.toString().indexOf(btList[i].name)!=-1){
                  if(btLinkStatus){
                     btList[i].connectStatus = true;
                  }else{
                    btList[i].showLoadStauts = false;
                    btList[i].connectStatus = true;
                    btLinkStatus = true;
                  }
                   setKey('checkedBt', i.toString());
                }else{
                   btList[i].showLoadStauts = false;
                  btList[i].connectStatus = false;
                }
              }
              String tempStr = '';
              for (int i = 0; i < btList.length; i++) {
                tempStr += '${btList[i].name}&';
              }
              setKey('btList', tempStr);
              return;
        });
       
      }else{
         btSet.add(obj.toString()); //去重
          List tempBtList = btSet.toList();
          List<BtInfoObj> tempBtList2 = [];
          for (int i = 0; i < tempBtList.length; i++) {
              tempBtList2.add(
                BtInfoObj(name: tempBtList[i], showLoadStauts: false, connectStatus: false)
              );
          }
          setState(() {
            btList =tempBtList2;
          });
          String tempStr = '';
          for (int i = 0; i < btList.length; i++) {
            tempStr += '${btList[i].name}&';
          }
          print(tempStr);
          setKey('btList', tempStr);
      }
    }
  }

  onError(Object obj) {
    print(obj.toString());
  }
  @override
  Widget build(BuildContext context) {
    return Container(
      child: Scaffold(
        appBar: AppBar(
          elevation: 0,
          title: Text('我的',
            style: TextStyle(
              fontSize: ScreenUtil.getInstance().setSp(36)
            ), ),
          centerTitle: true,
          backgroundColor: Color.fromRGBO(64, 98, 254, 1),
          actions: < Widget > [
            InkWell(
              child: Container(
                padding: EdgeInsets.only(right: ScreenUtil.getInstance().setWidth(30)),
                child: Center(
                  child: Text('退出'),
                )
              ),
              onTap: () {
                showDialog < Null > (
                  context: context, //BuildContext对象
                  barrierDismissible: false,
                  builder: (BuildContext context) {
                    return new LoadingDialog( //调用对话框
                      text: '确认退出？', childCallback: (val) {
                        if (val) {
                          clearKey();
                          Navigator.pushReplacement(context, MaterialPageRoute(builder: (context) {
                            return LoginPage();
                          }));
                        } else {
                          return;
                        }
                      },
                    );
                  });
              },
            )

          ],
        ),
        body: Container(
          color: Color.fromRGBO(246, 246, 254, 1),
          child: Column(
            children: < Widget > [
              _avatarWidget(),
               _funWrapWidget(context),
              Expanded(
                flex: 1,
                child: _btList()
              )
            ],
          ),
        ),
      )
    );
  }

  Widget _avatarWidget() {
    return Container(
      color: Color.fromRGBO(64, 98, 254, 1),
      padding: EdgeInsets.fromLTRB(0, ScreenUtil.getInstance().setHeight(59), 0, ScreenUtil.getInstance().setHeight(67), ),
      child: Column(
        children: < Widget > [
          Center(
            child: Padding(
              padding: EdgeInsets.only(bottom: ScreenUtil.getInstance().setWidth(24), ),
              child: ClipOval(
                child: Image.asset('lib/images/icon_logo.png',
                  fit: BoxFit.cover,
                  width: ScreenUtil.getInstance().setWidth(120),
                  height: ScreenUtil.getInstance().setWidth(120), ),
              )

            )
          ),
          Center(child: Text(name, style: TextStyle(fontSize: ScreenUtil.getInstance().setSp(30), color: Color.fromRGBO(255, 255, 255, 1)), ), )
        ],
      ),
    );
  }

  Widget _funWrapWidget(BuildContext context) {
    return Container(
      padding: EdgeInsets.only(top: ScreenUtil.getInstance().setHeight(20)),
      child: Column(
        children: < Widget > [
          _switchSite(context),
          _passWordWidget(),
          _printType(),
          _linkPrint(),
        ],
      ),
    );
  }

  Widget _switchSite(BuildContext context) {
    return InkWell(
      child: Container(
        height: ScreenUtil.getInstance().setHeight(90),
        color: Colors.white,
        padding: EdgeInsets.fromLTRB(ScreenUtil.getInstance().setHeight(30), 0, 0, 0),
        child: Column(
          children: < Widget > [
            Expanded(
              child: Center(
                child: Row(
                  mainAxisAlignment: MainAxisAlignment.spaceBetween,
                  children: < Widget > [
                    Expanded(
                      child: Row(
                        mainAxisAlignment: MainAxisAlignment.start,
                        children: < Widget > [
                          Padding(
                            padding: EdgeInsets.only(right: ScreenUtil.getInstance().setWidth(22)),
                            child: Image.asset('lib/images/icon_zhandianss.png',
                              width: ScreenUtil.getInstance().setWidth(30),
                              height: ScreenUtil.getInstance().setHeight(34),
                            )
                          ),
                          Text('站点切换', style: TextStyle(fontSize: ScreenUtil.getInstance().setSp(30), color: Color.fromRGBO(74, 74, 74, 1)), ),
                        ],
                      ),
                    ),
                    Expanded(
                      child: Row(
                        mainAxisAlignment: MainAxisAlignment.end,
                        children: < Widget > [
                          Text(_siteName, style: TextStyle(fontSize: ScreenUtil.getInstance().setSp(30), color: Color.fromRGBO(153, 153, 153, 1)), ),
                          Icon(Icons.keyboard_arrow_right, color: Color.fromRGBO(199, 199, 204, 1))
                        ],
                      ),
                    ),
                  ],
                ),
              ),
            ),
            Expanded(
              flex: 0,
              child: _underLine(),
            )
          ],
        )
      ),
      onTap: () {
        // showDialog < Null > (
        //   context: context, //BuildContext对象
        //   barrierDismissible: false,
        //   builder: (BuildContext context) {
        //     return SiteDialog( //调用对话框

        //     );
        //   });
        showPickerModal(context, 'station');
      },
    );
  }
  Widget _underLine() {
    return Container(
      height: ScreenUtil.getInstance().setHeight(1),
      color: Color.fromRGBO(223, 223, 223, 1),
    );
  }

  Widget _passWordWidget() {
    return
    GestureDetector(
      child: Container(
        height: ScreenUtil.getInstance().setHeight(90),
        color: Colors.white,
        padding: EdgeInsets.fromLTRB(ScreenUtil.getInstance().setHeight(30), 0, 0, 0),
        child: Column(
          children: < Widget > [
            Expanded(
              child: Center(
                child: Row(
                  mainAxisAlignment: MainAxisAlignment.spaceBetween,
                  children: < Widget > [
                    Expanded(
                      child: Row(
                        mainAxisAlignment: MainAxisAlignment.start,
                        children: < Widget > [
                          Padding(
                            padding: EdgeInsets.only(right: ScreenUtil.getInstance().setWidth(22)),
                            child: Image.asset('lib/images/icon_mimas.png',
                              width: ScreenUtil.getInstance().setWidth(30),
                              height: ScreenUtil.getInstance().setHeight(34),
                            )
                          ),
                          Text('修改密码', style: TextStyle(fontSize: ScreenUtil.getInstance().setSp(30), color: Color.fromRGBO(74, 74, 74, 1)), ),
                        ],
                      ),
                    ),
                    Icon(Icons.keyboard_arrow_right, color: Color.fromRGBO(199, 199, 204, 1))
                  ],
                ),
              ),
            )
          ],
        )
      ),
      onTap: () {
        Navigator.push(context, MaterialPageRoute(builder: (context) {
          return RevisePasswordPage();
        }));
      },
    );
  }

  Widget _linkPrint() {
    return Container(
      height: ScreenUtil.getInstance().setHeight(90),
      color: Colors.white,
      padding: EdgeInsets.fromLTRB(ScreenUtil.getInstance().setHeight(30), 0, 0, 0),
      margin: EdgeInsets.only(top: ScreenUtil.getInstance().setHeight(0)),
      child: Column(
        children: < Widget > [
           _underLine(),
          Expanded(
            child: Center(
              child: Row(
                mainAxisAlignment: MainAxisAlignment.spaceBetween,
                children: < Widget > [
                  Expanded(
                    child: Row(
                      mainAxisAlignment: MainAxisAlignment.start,
                      children: < Widget > [
                        Padding(
                          padding: EdgeInsets.only(right: ScreenUtil.getInstance().setWidth(22)),
                          child: Image.asset('lib/images/icon_dayinji.png',
                            width: ScreenUtil.getInstance().setWidth(30),
                            height: ScreenUtil.getInstance().setHeight(34),
                          )
                        ),
                        Text('扫描打印机', style: TextStyle(fontSize: ScreenUtil.getInstance().setSp(30), color: Color.fromRGBO(74, 74, 74, 1)), ),
                      ],
                    ),
                  ),
                  Switch(
                    value: check,
                    activeColor: Colors.blue,
                    onChanged: (bool val) {
                      if (val) {
                        bluetooth.isBTDevice().then((resp) {
                          if (resp) {
                            bluetooth.isEnableBluetooth().then((bool resp) { //打开蓝牙
                              bluetooth.enableBluetooth().then((resp){
                                  setState(() {
                                    check = true;
                                    btLinkStatus = false;
                                  });
                                  setKey('check', 'true');
                                  bluetooth.scanBT(); //
                              });
                            });

                          }
                        });
                      } else {
                        bluetooth.disConnnectBT(); //关闭蓝牙
                        setState(() {
                          check = false;
                          btList.clear();
                          btSet.clear();
                        });
                        setKey('check', 'false');
                      }

                    },
                  )
                ],
              ),
            ),
          ),
        ],
      )
    );
  }

  Widget _printType() {
    return InkWell(
      child: Container(
        height: ScreenUtil.getInstance().setHeight(90),
        color: Colors.white,
        padding: EdgeInsets.fromLTRB(ScreenUtil.getInstance().setHeight(30), 0, 0, 0),
        margin: EdgeInsets.only(top: ScreenUtil.getInstance().setHeight(20)),
        child: Column(
          children: < Widget > [
            Expanded(
              child: Center(
                child: Row(
                  mainAxisAlignment: MainAxisAlignment.spaceBetween,
                  children: < Widget > [
                    Expanded(
                      child: Row(
                        mainAxisAlignment: MainAxisAlignment.start,
                        children: < Widget > [
                          Padding(
                            padding: EdgeInsets.only(right: ScreenUtil.getInstance().setWidth(22)),
                            child: Image.asset('lib/images/icon_dayinji.png',
                              width: ScreenUtil.getInstance().setWidth(30),
                              height: ScreenUtil.getInstance().setHeight(34),
                            )
                          ),
                          Text('打印类型', style: TextStyle(fontSize: ScreenUtil.getInstance().setSp(30), color: Color.fromRGBO(74, 74, 74, 1)), ),
                        ],
                      ),
                    ),
                    Row(
                      mainAxisAlignment: MainAxisAlignment.end,
                      children: < Widget > [
                        Text(printType, style: TextStyle(fontSize: ScreenUtil.getInstance().setSp(30), color: Color.fromRGBO(153, 153, 153, 1)), ),
                        Icon(Icons.keyboard_arrow_right, color: Color.fromRGBO(199, 199, 204, 1))
                      ],
                    ),
                  ],
                ),
              ),
            )
          ],
        )
      ),
      onTap: () {
        showPickerModal(context, 'printType');
      },
    );
  }

  Widget _btList() {
    return Container(
      padding: EdgeInsets.all(ScreenUtil.getInstance().setHeight(30)),
      child: (btList.length > 0 && check == true) ? ListView.builder(
        itemCount: btList.length,
        itemBuilder: (BuildContext context, int index) {
          return _btItem(btList[index], index);
        },
      ) : check == true ? _searchBt() : Center()
    );
  }

  Widget _btItem(BtInfoObj obj, int index) {
    // print(obj.name);
    int tempIndex = obj.name.indexOf('||');
    String name = obj.name.substring(0, tempIndex);
    String btAddress = obj.name.substring(tempIndex + 2, obj.name.length);
    // print(btAddress);
    return InkWell(
      child:SafeArea(
        child:Padding(
          padding: EdgeInsets.only(bottom: ScreenUtil.getInstance().setHeight(30)),
          child: Row(
            mainAxisAlignment: MainAxisAlignment.spaceBetween,
            children: < Widget > [
              Text(name),
              obj.showLoadStauts ? SizedBox(
                width: ScreenUtil.getInstance().setWidth(30),
                height: ScreenUtil.getInstance().setHeight(30),
                child: Image.asset('lib/images/loading.gif'),
              ) :
              CircleAvatar(
                backgroundColor: obj.connectStatus ? Color.fromRGBO(64, 98, 254, 1) : Colors.grey,
                radius: 6,
              )
            ],
          )
        ),
      ),
      onTap: () {
        if(btList[index].connectStatus) return;//已连接直接返回
        for(int i=0;i<btList.length;i++){
          if(btList[i].showLoadStauts==true){//任何一个蓝牙连接在加载中就直接返回
            return;
          }
        }
        bluetooth.connectBT(btAddress);//连接蓝牙
        bluetooth.cancelDiscoveryBT();//停止扫描
         setState(() {
          btList[index].showLoadStauts = true;
        });
       
      },
    );
  }

  Widget _searchBt() {
    return Center(
      child: Row(
        mainAxisAlignment: MainAxisAlignment.center,
        children: < Widget > [
          Text('正在搜索...'),
          SizedBox(
            width: ScreenUtil.getInstance().setWidth(45),
            height: ScreenUtil.getInstance().setHeight(45),
            child: Image.asset('lib/images/loading.gif'),
          )
        ],
      ),
    );
  }

  showPickerModal(BuildContext context, String type) {
    var list;
    if (type == 'station') {
      list = stationList;
    } else if (type == 'printType') {
      list = printTypeList;
    }
    new Picker(
      adapter: PickerDataAdapter < String > (pickerdata: list),
      height: ScreenUtil.getInstance().setHeight(450),
      confirmText: '确定',
      confirmTextStyle: TextStyle(fontSize: ScreenUtil.getInstance().setSp(30), color: Color.fromRGBO(64, 98, 254, 1)),
      cancelText: '取消',
      cancelTextStyle: TextStyle(fontSize: ScreenUtil.getInstance().setSp(30), color: Color.fromRGBO(153, 153, 153, 1)),
      headercolor: Color.fromRGBO(245, 245, 245, 1),
      itemExtent: ScreenUtil.getInstance().setHeight(80),
      textStyle: TextStyle(fontSize: ScreenUtil.getInstance().setSp(30), color: Color.fromRGBO(42, 42, 42, 1)),
      changeToFirst: true,
      hideHeader: false,
      onConfirm: (Picker picker, List value) {
        if (type == 'station') {
          setState(() {
            _siteName = stationObj.data[value[0]].name;
          });
          setKey('stationId', stationObj.data[value[0]].id.toString());
          setKey('stationName',stationObj.data[value[0]].name);
        } else if (type == "printType") {
          setState(() {
            printType = printTypeList[value[0]];
          });
          setKey('printType', printTypeMap[printTypeList[value[0]]]);
          getKey('printType').then((value) {
            print(value);
          });
        }

      }
    ).showModal(this.context); //_scaffoldKey.currentState);
  }
  
}