huixiang_app/lib/utils/location.dart

import 'dart:async';

import 'package:dio/dio.dart';
import 'package:flutter/cupertino.dart';
import 'package:flutter/material.dart';
import 'package:flutter_easyloading/flutter_easyloading.dart';
import 'package:flutter_screenutil/flutter_screenutil.dart';
import 'package:geolocator/geolocator.dart';
import 'package:huixiang/generated/l10n.dart';
import 'package:huixiang/retrofit/data/address.dart';
import 'package:huixiang/retrofit/retrofit_api.dart';
import 'package:huixiang/view_widget/request_permission.dart';
import 'package:intl/intl.dart';
import 'package:permission_handler/permission_handler.dart' as PH;

import 'font_weight.dart';

class LocationInstance {
  static LocationInstance _instance;

  LocationInstance._internal() {}

  static LocationInstance getInstance() {
    if (_instance == null) {
      _instance = LocationInstance._internal();
    }
    return _instance;
  }

  Future<bool> startLocation(
      context, Function(Position locationData) locationCallback) async {
    LocationPermission permissionStatus = await Geolocator.checkPermission();
    if (permissionStatus == LocationPermission.denied) {
      permissionStatus = await Geolocator.requestPermission();
    }
    if (permissionStatus == LocationPermission.denied) {
      showTipsAlertDialog(context);
      return false;
    }
    if (permissionStatus == LocationPermission.deniedForever) {
      showTipsAlertDialog(context);
      return false;
    }
    if (permissionStatus == LocationPermission.whileInUse ||
        permissionStatus == LocationPermission.always) {
      bool isNext = true;
      Future.delayed(Duration(seconds: 5), () {
        if (isNext) {
          EasyLoading.dismiss();
        }
      });
      Position locationData = await Geolocator.getCurrentPosition();
      isNext = false;
      locationCallback.call(locationData);
    }
    return true;
  }

  void stopLocation() {}

  enableLocation(context) {
    showCupertinoDialog(
      context: context,
      builder: (context) {
        return RequestPermission(
          "assets/image/icon_permission_location_bg.webp",
          S.of(context).nindingweigongnengweikaiqi,
          S.of(context).weilexiangnintuijianfujindemendianxinxi,
          S.of(context).dakaidingwei,
          (result) async {
            if (result) {
              // final AndroidIntent intent = AndroidIntent(
              //     action: 'action_location_source_settings',
              //     package: "com.zsw.huixiang",
              // );
              // await intent.launch();
              Geolocator.openLocationSettings();
              // startLocation();
            }
          },
          heightRatioWithWidth: 0.82,
        );
      },
    );
  }

  requestDialog(context, Function(Position result) locationCallback) {
    showCupertinoDialog(
      context: context,
      builder: (context) {
        return RequestPermission(
          "assets/image/icon_permission_location_bg.webp",
          S.of(context).nindingweiquanxianweiyunxu,
          S.of(context).weilexiangnintuijianfujindemendianxinxi,
          S.of(context).kaiqiquanxian,
          (result) async {
            if (result) {
              await PH.openAppSettings();
              if ((await Geolocator.checkPermission()) ==
                      LocationPermission.whileInUse ||
                  (await Geolocator.checkPermission()) ==
                      LocationPermission.always) {
                startLocation(context, locationCallback);
              }
            }
          },
          heightRatioWithWidth: 0.82,
        );
      },
    );
  }

  ///定位权限说明弹窗
  showTipsAlertDialog(context) async {
    //显示对话框
    showDialog(
      context: context,
      barrierDismissible: false,
      barrierColor: null,
      builder: (BuildContext context) {
        return Column(
          children: [
            Container(
              width: double.infinity,
              padding: EdgeInsets.all(15),
              margin: EdgeInsets.all(15),
              decoration: new BoxDecoration(
                color: Colors.white,
                borderRadius: BorderRadius.circular(10),
              ),
              child: Row(
                crossAxisAlignment: CrossAxisAlignment.start,
                children: [
                  Icon(
                    Icons.location_on_outlined,
                    color: Colors.black,
                    size: 22,
                  ),
                  Expanded(
                    child: Column(
                      crossAxisAlignment: CrossAxisAlignment.start,
                      mainAxisSize: MainAxisSize.min,
                      children: [
                        Text(
                          // "访问精确地理位置信息权限说明",
                          "位置权限使用说明",
                          style: TextStyle(
                            fontSize: 18.sp,
                            fontWeight: MyFontWeight.regular,
                            color: Colors.black,
                          ),
                        ),
                        SizedBox(
                          height: 3.h,
                        ),
                        Text(
                          // "为了向您推荐附近的门店信息，推荐您在使用期间让我们使用位置信息，不授权该权限不影响app正常使用。",
                          "为了向您推荐附近的门店信息，推荐您在使用期间让我们使用位置信息",
                          style: TextStyle(
                            fontSize: 13.sp,
                            fontWeight: MyFontWeight.regular,
                            color: Colors.black,
                          ),
                        ),
                      ],
                    ),
                  ),
                ],
              ),
            )
          ],
          mainAxisSize: MainAxisSize.min,
        );
      },
    );
    Geolocator.requestPermission();
    Navigator.of(context).pop();
  }

  ///定位权限说明和申请弹窗
  showAlertDialog(context) {
    //显示对话框
    showDialog(
      context: context,
      barrierDismissible: true,
      barrierColor: null,
      builder: (BuildContext context) {
        return Column(
          children: [
            Container(
              width: double.infinity,
              padding: EdgeInsets.all(15),
              margin: EdgeInsets.all(15),
              decoration: new BoxDecoration(
                color: Colors.black.withOpacity(0.6),
                borderRadius: BorderRadius.circular(10),
              ),
              child: Row(
                crossAxisAlignment: CrossAxisAlignment.start,
                children: [
                  Expanded(
                    child: Column(
                      crossAxisAlignment: CrossAxisAlignment.start,
                      mainAxisSize: MainAxisSize.min,
                      children: [
                        Text(
                          // "访问精确地理位置信息权限说明",
                          "定位服务未开启",
                          style: TextStyle(
                            fontSize: 18.sp,
                            fontWeight: MyFontWeight.regular,
                            color: Colors.white,
                          ),
                        ),
                        SizedBox(
                          height: 3.h,
                        ),
                        Text(
                          // "为了向您推荐附近的门店信息，推荐您在使用期间让我们使用位置信息，不授权该权限不影响app正常使用。",
                          "开启后才能提供更详细的定位服务哦！",
                          style: TextStyle(
                            fontSize: 13.sp,
                            fontWeight: MyFontWeight.regular,
                            color: Colors.white,
                          ),
                        ),
                      ],
                    ),
                  ),
                  GestureDetector(
                    child: Container(
                      child: Text(
                        "去开启",
                        style: TextStyle(
                          fontSize: 15.sp,
                          fontWeight: MyFontWeight.regular,
                          color: Colors.white,
                        ),
                      ),
                      margin: EdgeInsets.symmetric(
                          horizontal: 15.w, vertical: 25.h),
                      padding:
                          EdgeInsets.symmetric(vertical: 2.h, horizontal: 10.w),
                      decoration: BoxDecoration(
                        color: Colors.green,
                        borderRadius: BorderRadius.circular(100),
                      ),
                    ),
                    onTap: () async {
                      await PH.openAppSettings();
                      if ((await Geolocator.checkPermission()) ==
                              LocationPermission.whileInUse ||
                          (await Geolocator.checkPermission()) ==
                              LocationPermission.always)
                        Navigator.of(context).pop();
                    },
                    behavior: HitTestBehavior.opaque,
                  ),
                  GestureDetector(
                    behavior: HitTestBehavior.opaque,
                    child: Container(
                      child: Icon(
                        Icons.close,
                        color: Colors.white.withOpacity(0.8),
                        size: 12,
                      ),
                      decoration: BoxDecoration(
                        color: Colors.black.withOpacity(0.8),
                        borderRadius: BorderRadius.circular(100),
                      ),
                      padding: EdgeInsets.all(5),
                    ),
                    onTap: () {
                      Navigator.of(context).pop();
                    },
                  )
                ],
              ),
            )
          ],
          mainAxisSize: MainAxisSize.min,
        );
      },
    );
  }

  ///计算距离（当前位置到店位置直线距离）
  static Future<String> calculateDistance(
      Position bmfCoordinate, Position myLatLng,
      {bool isMi = false}) async {
    double mi = Geolocator.distanceBetween(
      bmfCoordinate.latitude,
      bmfCoordinate.longitude,
      myLatLng.latitude,
      myLatLng.longitude,
    );
    NumberFormat numberFormat = NumberFormat("#.#");
    return "${numberFormat.format(mi / (isMi ? 1 : 1000))}";
  }

  // ///坐标系转换(高德转百度)
  // static Future<Latlng> coordConvert(Latlng latLng) async {
  //   return BMFCalculateUtils.coordConvert(
  //       coordinate: latLng,
  //       fromType: BMF_COORD_TYPE.COMMON,
  //       toType: BMF_COORD_TYPE.BD09LL);
  // }

  Future<Address> getAddress(double lat, double lang) async {
    var result = await ApiService(Dio()).geocodeRegeo("$lat", "$lang");
    print("address_result: $result");
    if (result["status"] == 1 &&
        result["regeocode"] != null &&
        result["regeocode"]["addressComponent"] != null) {
      Address address = Address.fromJson({
        "address": result["regeocode"]["formatted_address"],
        "area": result['regeocode']["addressComponent"]["district"],
        "city": result['regeocode']["addressComponent"]["city"],
        "latitude": lat,
        "longitude": lang,
        "province": result['regeocode']["addressComponent"]["province"],
      });
      return address;
    }
    return null;
  }
}