位置消息

IMKit 基于高德地图 SDK 提供了位置消息，实现了应用地图预览功能。

• SDK 默认发送的消息包含位置消息内容对象 LocationMessage（类型标识：RC:LBSMsg）。

提示

IMKit 默认会话页面未启用位置功能。如需要使用位置功能，需要自定义位置插件开发。下面提供了示例代码进行参考。

发送位置消息

通过自定义位置消息插件，在扩展面板里会自动生成位置消息入口。用户点击输入栏右侧 + 号按钮可展开扩展面板，点击位置图标，即可发送位置消息。

示例基于鸿蒙 Map Kit SDK，集成于配置请参照鸿蒙开发文档。

自定义位置插件

LocationPlugin 是提供给开发者借鉴的位置插件示例代码。开发者需要在 sendLocation 方法中编写跳转 LocationPage 的代码。

TypeScript

import { ArrayChecker, ConversationIdentifier } from '@rongcloud/imlib';
import { IBoardPlugin } from '@rongcloud/imkit';
import { PermissionsUtil } from '../../../utils/PermissionsUtil';
import { LocationParams, SelectLocationType } from '../model/LocationParams';
import { common, Permissions } from '@kit.AbilityKit';

/**
 * 加号扩展栏的位置插件
 * @version 1.0.0
 */
export class LocationPlugin implements IBoardPlugin {

  obtainTitle(context: Context): ResourceStr {
    return $r("app.string.rc_location");
  }

  obtainImage(context: Context): ResourceStr {
    return $r("app.media.rc_input_bar_plugin_location");
  }

  onClick(context: Context, conId: ConversationIdentifier): void {
    //先检查收否授权地图权限，没有授权的话去设置权限
    const permissionArray: Permissions[] = [
      'ohos.permission.LOCATION',
      'ohos.permission.APPROXIMATELY_LOCATION'
    ];
    PermissionsUtil.checkPermissions(permissionArray)
      .then((array: Permissions[]) => {
        //已经授权
        if (array.length === 0) {
          // 发送位置页面
          this.sendLocation(conId);
        } else {
          // 没授权，需要申请权限
          PermissionsUtil.requestPermissionsFromUser(getContext(this) as common.UIAbilityContext, permissionArray)
            .then((permissions: Array<Permissions>) => {
              if (ArrayChecker.isValid(permissions)) {
                PermissionsUtil.requestPermissionOnSetting(getContext(this) as common.UIAbilityContext,
                  permissionArray);
              } else {
                // 发送位置页面
                this.sendLocation(conId);
              }
            });
        }
      });
  }

  /**
   * 发送位置页面
   */
  private sendLocation(conId: ConversationIdentifier) {
    let param: LocationParams = { conId: conId, flag: SelectLocationType.Send }
    // 跳转到 LocationPage 页面，携带 LocationParams 参数。
  }

  onFilter(conId: ConversationIdentifier): boolean {
    return true;
  }
}

添加自定义插件到扩展面板

添加位置插件到最后位置。

TypeScript

let plugin = new LocationPlugin()
RongIM.getInstance().conversationService().addBoardPlugin(plugin)

也可以把位置插件插入到指定位置。

TypeScript

let plugin = new LocationPlugin()
let filePluginIndex = 1
RongIM.getInstance().conversationService().replaceBoardPlugin(filePluginIndex, plugin)

发送位置/查看位置页面示例

LocationPage 是提供给开发者借鉴的发送位置/查看位置示例代码。

• 支持通过自定义位置插件跳转到此页面，选择位置并发送 LocationMessage，见 returnSelectLocation 方法。
• 支持通过点击 LocationMessage 的 UI 跳转到此页面，查看位置。见 自定义位置消息UI。
• 需要 App 侧在 backPage 方法处理返回上个页面的逻辑。

TypeScript

import {
  ConversationIdentifier,
  LocationCoordinateType,
  LocationMessage,
  Message,
  RCTitleBar,
  RongIM,
  StringChecker
} from '@rongcloud/imkit';
import { LocationData } from '../model/LocationData';
import { LocationParams } from '../model/LocationParams';
import { map, mapCommon, MapComponent, site, staticMap } from '@kit.MapKit';
import { AsyncCallback, BusinessError } from '@kit.BasicServicesKit';
import { geoLocationManager } from '@kit.LocationKit';
import { router } from '@kit.ArkUI';
import { common, Want } from '@kit.AbilityKit';
import { connection } from '@kit.NetworkKit';
import { image } from '@kit.ImageKit';
import { buffer } from '@kit.ArkTS';

@Entry
@Component
export struct LocationPage {
  // 网络状态
  @State isNetwork: boolean = false;
  private netCon: connection.NetConnection | undefined;
  // 地图属性
  private mapOptions?: mapCommon.MapOptions;
  private callback?: AsyncCallback<map.MapComponentController>;
  private mapController?: map.MapComponentController;
  private mapEventManager?: map.MapEventManager;
  // 当前位置
  private myLatLng: mapCommon.LatLng = LocationHelper.defaultLatLng;
  // 展示的周边列表数据
  @State locationList: Array<LocationData> = [];
  private pageIndexDefault: number = 1;
  // 页码
  private pageIndex: number = this.pageIndexDefault;
  // 每页数量
  private pageSize: number = 20;
  private locationIndexDefault: number = 0;
  // 选择的位置下标
  @State
  private locationIndex: number = -1;
  // 是否在获取周边数据
  private nearbySearchType: boolean = false;
  // app内主动移动地图的次数，如果是app内主动移动地图，不需要在地图移动后获取位置信息和周边
  // 初始值为1，是在地图初始化后，会自动回调一下地图移动的回调
  private appRemoveNum: number = 1;
  @State
  private selectAddress: string = '';
  // 是否只展示地图
  private isOnlyShowMap: boolean = false;
  // 地图所需参数
  private locationParams?: LocationParams;
  // 错误码
  private errorCode: string = ''
  // 会话ID
  private conId: ConversationIdentifier = new ConversationIdentifier();
  // 标题栏
  @State model: RCTitleBar.Model = new RCTitleBar.Model()
    .setTitleName(getContext().resourceManager.getStringByNameSync('rc_location'))
    .setTitleFontSize(18)
    .setLeftIcon($r("app.media.rc_title_bar_back"))
    .setRightTitleName(getContext().resourceManager.getStringByNameSync('rc_chat_send'))
    .setRightTitleFontColor(this.isNetwork ? $r('app.color.rc_color_0195ff') : $r('app.color.rc_color_C7CCD4'))
    .setOnLeftClickListener(() => {
      this.backPage()
    })
    .setOnRightClickListener(() => {
      if (!this.isNetwork) {
        return;
      }
      if (this.errorCode === '3301100') {
        return;
      }
      if (this.locationIndex === -1) {
        return;
      }
      if (!this.locationList.length) {
        return;
      }
      this.returnSelectLocation();
    })

  aboutToAppear(): void {
    // 网络监听
    this.networkListen()
    // 获取路由参数
    if (router.getParams()) {
      this.locationParams = router.getParams() as LocationParams;
      if (this.locationParams.conId && this.locationParams.flag == 1) {
        this.conId.targetId = this.locationParams.conId?.targetId!
        this.conId.conversationType = this.locationParams.conId?.conversationType!
      } else if (this.locationParams.locationData && this.locationParams.flag == 2) {
        if (this.locationParams.locationData) {
          // 有位置数据，只展示地图和标记当前要显示的位置
          this.isOnlyShowMap = !this.isOnlyShowMap;
          this.model.setRightTitleName('')
        }
      }
    }
    // 地图初始化参数，设置地图中心点坐标及层级
    this.initMapData()
  }

  private initMapData() {
    // 地图参数
    this.mapOptions = LocationHelper.getMapInitOption(this.isOnlyShowMap);
    // 地图初始化的回调
    this.callback = async (err, mapController) => {
      if (!err) {
        // 获取地图的控制器类，用来操作地图
        this.mapController = mapController;
        this.mapEventManager = this.mapController.getEventManager();
        this.mapEventManager.on('error', (err: BusinessError) => {
        });
        // 地图加载事件
        let mapLoadCallback = () => {
          //地图加载完成获取定位信息，
          if (!this.isOnlyShowMap) {
            this.getMyLocation();
          } else {
            if (this.mapController !== undefined) {
              LocationHelper.animateCamera(this.locationParams?.locationData?.latitude!,
                this.locationParams?.locationData?.longitude!, this.mapController);
              LocationHelper.addPointAnnotation(this.locationParams?.locationData?.latitude!,
                this.locationParams?.locationData?.longitude!, this.locationParams?.locationData?.name!,
                this.mapController);
            }
          }
        };
        this.mapEventManager.on("mapLoad", mapLoadCallback);
        // 相机移动结束事件
        let cameraIdleCallback = () => {
          // 如果是app内主动移动地图，不需要获取信息
          if (this.appRemoveNum > 0) {
            this.appRemoveNum--;
            return;
          }
          //获取地图移动后的中心点
          let position: mapCommon.CameraPosition = this.mapController?.getCameraPosition() as mapCommon.CameraPosition;
          this.getLocationDetail(position.target.latitude, position.target.longitude);
        };
        if (!this.isOnlyShowMap) {
          this.mapEventManager.on("cameraIdle", cameraIdleCallback);
        }
        // 我的位置按钮点击事件
        let myLocationButtonClickCallback = () => {
          this.getMyLocation();
        };
        this.mapEventManager.on("myLocationButtonClick", myLocationButtonClickCallback);
        // 启用我的位置图层
        this.mapController.setMyLocationEnabled(!this.isOnlyShowMap);
        // 启用我的位置按钮
        this.mapController.setMyLocationControlsEnabled(!this.isOnlyShowMap);
      } else {
      }
    };
  }

  /**
   * 获取当前位置，并移动地图到当前位置
   */
  private getMyLocation() {
    try {
      let currentLocation = geoLocationManager.getCurrentLocation();
      if (!currentLocation) {
        return;
      }
      // 获取用户位置坐标
      currentLocation.then((location: geoLocationManager.Location) => {
        // 设置用户的位置
        // TODO location参数需使用WGS84坐标系。
        this.mapController?.setMyLocation(location);

        let gcj02Position = LocationHelper.wgs84ToGcj02(location.latitude, location.longitude);
        this.myLatLng.latitude = gcj02Position.latitude;
        this.myLatLng.longitude = gcj02Position.longitude;

        if (this.mapController !== undefined) {
          this.appRemoveNum++;
          LocationHelper.animateCamera(this.myLatLng.latitude, this.myLatLng.longitude, this.mapController);
        }
        this.getLocationDetail(this.myLatLng.latitude, this.myLatLng.longitude);
      })
      this.errorCode = '';
    } catch (e) {
      this.errorCode = e.code;
      if (this.errorCode === '3301100') {
        this.model.setRightTitleFontColor($r('app.color.rc_color_C7CCD4'))
        this.showLocationDialog();
      }
    }
  }

  private showLocationDialog() {
    AlertDialog.show({
      title: '温馨提示',
      message: '位置开关已被关闭，打开后才能正常发送',
      autoCancel: true,
      alignment: DialogAlignment.Center,
      primaryButton: {
        value: '去开启',
        fontColor: $r('app.color.rc_color_0195ff'),
        action: () => {
          this.openSetting();
        }
      },
      cornerRadius: 12,
      width: '80%',
    });
  }

  private openSetting() {
    let context = getContext(this) as common.UIAbilityContext;
    let want: Want = {
      bundleName: 'com.huawei.hmos.settings', //设置应用bundleName
      abilityName: 'com.huawei.hmos.settings.MainAbility', //设置应用abilityName
      uri: "location_manager_settings"
    }
    context.startAbility(want)
  }

  /**
   * 逆地理编码，根据当前位置经纬度获取详细信息
   */
  private getLocationDetail(latitude: number, longitude: number) {
    //重置显示数据
    this.errorCode = '';
    this.locationList = [];
    this.pageIndex = this.pageIndexDefault;
    this.locationIndex = this.locationIndexDefault;
    LocationHelper.reverseGeocode(latitude, longitude).then((result: LocationData) => {
      this.selectAddress = result.name;
      this.locationList.push(result);
      this.nearbySearch();
    })
  }

  /**
   * 周边搜索
   */
  private nearbySearch() {
    if (this.locationList.length > 0 && this.locationList.length > 0) {
      LocationHelper.nearbySearch(this.locationList[0].latitude, this.locationList[0].longitude, this.pageIndex,
        this.pageSize)
        .then((value: Array<LocationData>) => {
          this.locationList.push(...value);
          if (this.nearbySearchType) {
            this.nearbySearchType = !this.nearbySearchType;
          }
        });
    }
  }

  // 页面每次显示时触发一次，包括路由过程、应用进入前台等场景，仅@Entry装饰的自定义组件生效
  onPageShow(): void {
    // 将地图切换到前台
    if (this.mapController !== undefined) {
      this.mapController.show();
    }
    if (this.errorCode === '3301100') {
      if (connection.hasDefaultNetSync()) {
        this.isNetwork = true;
        this.model.setRightTitleFontColor($r('app.color.rc_color_0195ff'))
        //获取地图移动后的中心点
        let position: mapCommon.CameraPosition = this.mapController?.getCameraPosition() as mapCommon.CameraPosition;
        if (position) {
          this.getLocationDetail(position.target.latitude, position.target.longitude);
        }
      }
    }
  }

  // 页面每次隐藏时触发一次，包括路由过程、应用进入后台等场景，仅@Entry装饰的自定义组件生效。
  onPageHide(): void {
    // 将地图切换到后台
    if (this.mapController !== undefined) {
      // TODO 模拟器加载地图调用此api会崩溃，先抛出
      try {
        this.mapController.hide();
      } catch (e) {
        console.error(JSON.stringify(e));
      }
    }
  }

  build() {
    Column() {
      RCTitleBar({ model: this.model })

      RelativeContainer() {
        // 调用MapComponent组件初始化地图
        MapComponent({ mapOptions: this.mapOptions, mapCallback: this.callback })

        if (!this.isOnlyShowMap) {
          Row() {
            Image($r('sys.media.ohos_ic_public_location'))
              .width(20)
              .height(20)
            Text(this.selectAddress)
              .layoutWeight(1)
          }
          .backgroundColor(Color.White)
          .width('80%')
          .padding(10)
          .margin({ top: 10 })
          .alignRules({
            middle: { anchor: '__container__', align: HorizontalAlign.Center }
          })

          Image($r('app.media.rc_map_location_mark'))
            .objectFit(ImageFit.Auto)
            .width(24)
            .height(58)
            .alignRules({
              center: { anchor: '__container__', align: VerticalAlign.Center },
              middle: { anchor: '__container__', align: HorizontalAlign.Center }
            })
        }
      }
      .width('100%')
      .layoutWeight(2)

      if (!this.isOnlyShowMap) {
        List() {
          ForEach(this.locationList, (item: LocationData, index: number) => {
            ListItem() {
              Row() {
                Column() {

                  Text(item.name)
                    .layoutWeight(1)
                    .width('100%')

                  Text(item.address)
                    .width('100%')
                    .fontColor(Color.Grey)
                    .fontSize(14)
                    .maxLines(1)
                    .textOverflow({ overflow: TextOverflow.Ellipsis })
                    .margin({ top: 10 })
                    .visibility(item.address ? Visibility.Visible : Visibility.None)
                }
                .padding(10)
                .height(70)
                .layoutWeight(1)

                Image($r('sys.media.ohos_ic_public_ok_filled'))
                  .width(15)
                  .height(15)
                  .visibility(index === this.locationIndex ? Visibility.Visible : Visibility.None);
              }
            }
            .margin({ right: 20 })
            .onClick(() => {
              this.locationIndex = index;
              this.selectAddress = item.name
              this.appRemoveNum++;
              LocationHelper.animateCamera(item.latitude, item.longitude, this.mapController!);
            })
          }, (item: LocationData, index: number) => {
            return `${item.latitude}${item.longitude}${index}`;
          })
        }
        .divider({ strokeWidth: 1 })
        .onScrollVisibleContentChange((start: VisibleListContentInfo, end: VisibleListContentInfo) => {
          //滑动到最后一个item，查询后边的数据
          if (end.index !== this.locationList.length - 1) {
            return;
          }
          this.searchNextPage();
        })
        .layoutWeight(1)
      }

    }
  }
  
  // 返回上个页面
  private backPage() {
    // 处理返回上个页面
  }

  /**
   * 继续搜索下一页数据
   */
  private searchNextPage() {
    if (!this.nearbySearchType) {
      this.nearbySearchType = !this.nearbySearchType;
      this.pageIndex++;
      this.nearbySearch();
    }
  }

  /**
   * 返回选择的位置
   */
  private returnSelectLocation() {
    LocationHelper.getMapImage(this.locationList[this.locationIndex].latitude,
      this.locationList[this.locationIndex].longitude).then((value: PixelMap) => {
      // 返回数据给上个页面
      let selectLocation: LocationData = this.locationList[this.locationIndex];
      ImageUtil.pixelMapToBase64(value).then((base64: string) => {
        selectLocation.img = base64;
        let locationMessage: LocationMessage = new LocationMessage();
        locationMessage.latitude = selectLocation.latitude;
        locationMessage.longitude = selectLocation.longitude;
        locationMessage.poi = selectLocation.name;
        locationMessage.thumbnailBase64 = selectLocation.img!;
        locationMessage.type = LocationCoordinateType.GCJ02;
        let msg = new Message(this.conId, locationMessage);
        RongIM.getInstance().messageService().sendMessage(msg);
        router.back();
      });
    });
  }

  private networkListen() {
    this.netCon = connection.createNetConnection();
    this.netCon.register((error: BusinessError) => {
      if (error) {
        console.log('networkListen fail' + JSON.stringify(error))
        return;
      }
    });

    this.netCon.on('netAvailable', (data: connection.NetHandle) => {
      console.info("Succeeded to get netAvailable: " + JSON.stringify(data));
      if (connection.hasDefaultNetSync()) {
        this.isNetwork = true;
        this.model.setRightTitleFontColor($r('app.color.rc_color_0195ff'))
        //获取地图移动后的中心点
        let position: mapCommon.CameraPosition = this.mapController?.getCameraPosition() as mapCommon.CameraPosition;
        if (position) {
          this.getLocationDetail(position.target.latitude, position.target.longitude);
        }
      }
    });

    // 订阅网络丢失事件
    this.netCon.on('netLost', (data: connection.NetHandle) => {
      if (connection.getAllNetsSync().length == 0) {
        this.isNetwork = false;
        this.model.setRightTitleFontColor($r('app.color.rc_color_C7CCD4'))
      }
      console.info("Succeeded to get netLost: " + JSON.stringify(data));
    });

    this.netCon.on('netCapabilitiesChange', (data: connection.NetCapabilityInfo) => {
      console.info("Succeeded to get netCapabilitiesChange: " + JSON.stringify(data));
    });

    this.netCon.on('netUnavailable', () => {
      console.info("Succeeded to get unavailable net event");
      this.isNetwork = false;
      this.model.setRightTitleFontColor($r('app.color.rc_color_C7CCD4'))
    });
  }

  aboutToDisappear(): void {
    this.netCon?.unregister((error: BusinessError) => {
      console.log(JSON.stringify(error));
    });
  }
}



export class LocationHelper {
  // 地图默认中心点纬度-北京
  private static centerDefaultLat: number = 39.9042;
  // 地图默认中心点经度-北京
  private static centerDefaultLon: number = 116.4074;
  public static defaultLatLng: mapCommon.LatLng =
    { latitude: LocationHelper.centerDefaultLat, longitude: LocationHelper.centerDefaultLon };
  // 地图默认展示的层级
  private static centerDefaultZoom: number = 10;
  // 移动地图到某一点的图层
  private static animateCameraDefaultZoom: number = 15;
  // 输入语言
  private static language: string = "zh";
  // 逆地理编码搜索半径
  private static reverseGeocodeRadius: number = 10;
  // 周边搜索半径
  private static nearbySearchRadius: number = 5000;
  // 地图移动到指定经纬度的时长
  private static animateCameraDuration: number = 500;
  // 静态图的图层
  private static mapImageZoom: number = 17;
  // 静态图的宽高
  private static mapImageWidth: number = 300;
  private static mapImageHeight: number = 200;
  // 静态图的比例
  private static mapImageScale: number = 1;

  /**
   * 地图初始化参数
   * @returns
   */
  public static getMapInitOption(isOnlyShowMap: boolean): mapCommon.MapOptions {
    let mapOptions: mapCommon.MapOptions = {
      position: {
        target: LocationHelper.defaultLatLng,
        zoom: LocationHelper.centerDefaultZoom
      },
      // 设置地图深色模式
      dayNightMode: mapCommon.DayNightMode.AUTO,
      // 是否展示我的位置按钮，默认值：false
      myLocationControlsEnabled: !isOnlyShowMap,
      // 是否展示指南针控件，默认值：true
      compassControlsEnabled: false,
      // 是否展示缩放控件，默认值：true
      zoomControlsEnabled: false
    };
    return mapOptions;
  }

  /**
   * 经纬度转换，wgs84转为gcj02
   */
  public static wgs84ToGcj02(lat: number, lon: number): mapCommon.LatLng {
    let wgs84Position: mapCommon.LatLng = {
      latitude: lat,
      longitude: lon
    };
    // 转换经纬度坐标
    let gcj02Position: mapCommon.LatLng =
      map.convertCoordinateSync(mapCommon.CoordinateType.WGS84, mapCommon.CoordinateType.GCJ02, wgs84Position);
    return gcj02Position;
  }

  /**
   * 逆地理编码，最终返回页面列表显示的数据
   * @param lat
   * @param lon
   * @returns
   */
  public static reverseGeocode(lat: number, lon: number): Promise<LocationData> {
    return new Promise((resolve) => {
      let params: site.ReverseGeocodeParams = {
        // 位置经纬度
        location: {
          latitude: lat,
          longitude: lon
        },
        isExtension: true,
        language: LocationHelper.language,
        radius: LocationHelper.reverseGeocodeRadius
      };
      site.reverseGeocode(params).then((result: site.ReverseGeocodeResult) => {
        let addressName: string = "";
        let addressLatitude: number = lat;
        let addressLongitude: number = lon;
        let pois: Array<site.ReverseGeocodePoi> = result.pois as Array<site.ReverseGeocodePoi>;
        if (pois) {
          addressName = StringChecker.getStringSafety(pois[0].name);
          addressLatitude = pois[0].location?.latitude as number;
          addressLongitude = pois[0].location?.longitude as number;
        } else {
          let aois: Array<site.Aoi> = result.aois as Array<site.Aoi>;
          if (aois) {
            addressName = StringChecker.getStringSafety(aois[0].name);
            addressLatitude = aois[0].location?.latitude as number;
            addressLongitude = aois[0].location?.longitude as number;
          } else {
            let roads: Array<site.Road> = result.roads as Array<site.Road>;
            if (roads) {
              addressName = StringChecker.getStringSafety(roads[0].name);
              addressLatitude = roads[0].location?.latitude as number;
              addressLongitude = roads[0].location?.longitude as number;
            } else {
              addressName = result.addressDescription;
            }
          }
        }
        let resultData: LocationData = { latitude: addressLatitude, longitude: addressLongitude, name: addressName };
        resolve(resultData);
      });
    });
  }

  /**
   * 周边搜索
   * @param lat
   * @param lon
   * @param pageIndex
   * @param pageSize
   */
  public static nearbySearch(lat: number, lon: number, pageIndex: number,
    pageSize: number): Promise<Array<LocationData>> {
    return new Promise((resolve) => {
      let list: Array<LocationData> = [];
      let params: site.NearbySearchParams = {
        // 经纬度坐标
        location: {
          latitude: lat,
          longitude: lon
        },
        // 指定地理位置的范围半径
        radius: LocationHelper.nearbySearchRadius,
        language: LocationHelper.language,
        pageIndex: pageIndex,
        pageSize: pageSize
      };
      // 返回周边搜索结果
      site.nearbySearch(params).then((result: site.NearbySearchResult) => {
        result.sites?.forEach((item: site.Site) => {
          list.push({
            latitude: item.location?.latitude as number,
            longitude: item.location?.longitude as number,
            name: StringChecker.getStringSafety(item.name),
            address: StringChecker.getStringSafety(item.formatAddress)
          });
        });
        resolve(list);
      });
    });
  }

  /**
   * 根据关键词搜索地点
   * @param searchKey
   * @returns
   */
  public static searchByTextAndLocation(searchKey: string, location?: mapCommon.LatLng): Promise<Array<LocationData>> {
    return new Promise((resolve) => {
      let list: Array<LocationData> = [];
      let params: site.SearchByTextParams = {
        // 指定关键字
        query: searchKey,
        location: location,
        language: LocationHelper.language
      };
      // 返回关键字搜索结果
      site.searchByText(params).then((result: site.SearchByTextResult) => {
        result.sites?.forEach((item: site.Site) => {
          list.push({
            latitude: item.location?.latitude as number,
            longitude: item.location?.longitude as number,
            name: StringChecker.getStringSafety(item.name),
            address: StringChecker.getStringSafety(item.formatAddress)
          });
        });
        resolve(list);
      });
    });
  }

  /**
   * 移动地图到指定的经纬度
   * @param lat
   * @param lon
   * @param mapController
   */
  public static animateCamera(lat: number, lon: number, mapController: map.MapComponentController) {
    let latLng: mapCommon.LatLng = {
      latitude: lat,
      longitude: lon
    };
    let cameraUpdate: map.CameraUpdate = map.newLatLng(latLng, LocationHelper.animateCameraDefaultZoom);
    // 以动画方式移动地图相机
    mapController.animateCamera(cameraUpdate, LocationHelper.animateCameraDuration);
  }

  /**
   * 获取地图静态图
   * @param lat
   * @param lon
   * @returns
   */
  public static getMapImage(lat: number, lon: number): Promise<PixelMap> {
    return new Promise((resolve) => {
      // 设置静态图标记参数
      let markers: Array<staticMap.StaticMapMarker> = [{
        location: {
          latitude: lat,
          longitude: lon
        },
        defaultIconSize: staticMap.IconSize.TINY
      }];
      // 拼装静态图参数
      let staticMapOptions: staticMap.StaticMapOptions = {
        location: {
          latitude: lat,
          longitude: lon
        },
        zoom: LocationHelper.mapImageZoom,
        imageWidth: LocationHelper.mapImageWidth,
        imageHeight: LocationHelper.mapImageHeight,
        scale: LocationHelper.mapImageScale,
        markers: markers
      };
      // 获取静态图
      staticMap.getMapImage(staticMapOptions).then((value: PixelMap) => {
        resolve(value);
      });
    });
  }

  /**
   * 在地图上添加标记
   * @param lat
   * @param lon
   * @param mapController
   */
  public static async addMarker(lat: number, lon: number, mapController: map.MapComponentController) {
    if (mapController) {
      //清除所有的圆、标记、折线等覆盖物
      mapController.clear();

      let markerOptions: mapCommon.MarkerOptions = {
        position: {
          latitude: lat,
          longitude: lon
        },
        rotation: 0,
        visible: true,
        zIndex: 0,
        alpha: 1,
        anchorU: 0.5,
        anchorV: 1,
        clickable: true,
        draggable: true,
        flat: false,
        icon: $r('app.media.rc_portrait_person_default')
      };
      //给地图中心点添加标记
      await mapController.addMarker(markerOptions);
    }
  }

  /**
   * 增加点注释
   */
  public static addPointAnnotation(lat: number, lon: number, name: string, mapController: map.MapComponentController) {
    let pointAnnotationOptions: mapCommon.PointAnnotationParams = {
      // 定义点注释图标锚点
      position: {
        latitude: lat,
        longitude: lon
      },
      // 定义点注释名称与地图poi名称相同时，是否支持去重
      repeatable: true,
      // 定义点注释的碰撞规则
      collisionRule: mapCommon.CollisionRule.NAME,
      // 定义点注释的标题，数组长度最小为1，最大为3
      titles: [{
        // 定义标题内容
        content: name,
        // 定义标题字体颜色
        color: getContext().resourceManager.getColorSync($r("app.color.rc_color_0E1012")),
        // 定义标题字体大小
        fontSize: 16,
        // 定义标题描边颜色
        // strokeColor: 0xFFFFFFFF,
        // 定义标题描边宽度
        strokeWidth: 2,
        // 定义标题字体样式
        fontStyle: mapCommon.FontStyle.ITALIC
      }
      ],
      // 定义点注释的图标，图标存放在resources/rawfile
      icon: "",
      // 定义点注释是否展示图标
      showIcon: true,
      // 定义点注释的锚点在水平方向上的位置
      anchorU: 0.5,
      // 定义点注释的锚点在垂直方向上的位置
      anchorV: 1,
      // 定义点注释的显示属性，为true时，在被碰撞后仍能显示
      forceVisible: true,
      // 定义碰撞优先级，数值越大，优先级越低
      priority: 3,
      // 定义点注释展示的最小层级
      minZoom: 2,
      // 定义点注释展示的最大层级
      maxZoom: 22,
      // 定义点注释是否可见
      visible: true,
      // 定义点注释叠加层级属性
      zIndex: 10
    };
    mapController.addPointAnnotation(pointAnnotationOptions);
  }
}

export class ImageUtil {
  /**
   * 图像数据转为 Base64
   */
  public static pixelMapToBase64(pixelMap: PixelMap): Promise<string> {
    return new Promise((resolve) => {
      const imagePackerApi: image.ImagePacker = image.createImagePacker();
      let packOpts: image.PackingOption = { format: 'image/jpeg', quality: 100 };
      imagePackerApi.packing(pixelMap, packOpts).then((data: ArrayBuffer) => {
        let buf: buffer.Buffer = buffer.from(data);
        let base64 = buf.toString('base64', 0, buf.length);
        resolve(base64);
      });
    });
  }
}

示例代码中引用到的类

权限管理类

TypeScript

import { abilityAccessCtrl, common, Permissions } from '@kit.AbilityKit';
import { bundleManager } from '@kit.AbilityKit';
import { ArrayChecker, ObjectChecker } from '@rongcloud/imlib';

export class PermissionsUtil {
  /**
   * 检查某个权限是否已授权
   * @param permission 需要检查的权限
   * @returns 授权状态
   */
  public static async checkPermission(permission: Permissions): Promise<abilityAccessCtrl.GrantStatus> {
    let atManager: abilityAccessCtrl.AtManager = abilityAccessCtrl.createAtManager();
    let grantStatus: abilityAccessCtrl.GrantStatus = abilityAccessCtrl.GrantStatus.PERMISSION_DENIED;

    // 获取应用程序的accessTokenID
    let tokenId: number = await PermissionsUtil.getAccessTokenId();

    // 校验应用是否被授予权限
    try {
      grantStatus = atManager.checkAccessTokenSync(tokenId, permission);
    } catch (error) {
      // 异常
    }
    return grantStatus;
  }

  /**
   * 检查一个 Array 里未授权的权限
   * @param checkPermissionArray 需要检查的权限 Array
   * @returns 返回未授权的 Array
   */
  public static async checkPermissions(checkPermissionArray: Array<Permissions>): Promise<Array<Permissions>> {
    const deniedPermissions: Array<Permissions> = new Array();

    if (ArrayChecker.isValid(checkPermissionArray)) {
      for (let checkPermissionArrayElement of checkPermissionArray) {
        if (!ObjectChecker.isValid(checkPermissionArrayElement)) {
          continue;
        }
        let grantStatus: abilityAccessCtrl.GrantStatus =
          await PermissionsUtil.checkPermission(checkPermissionArrayElement);

        if (grantStatus === abilityAccessCtrl.GrantStatus.PERMISSION_DENIED) {
          //未授权
          deniedPermissions.push(checkPermissionArrayElement);
        }
      }
    }
    return deniedPermissions;
  }

  /**
   * 动态请求权限
   * @param context UIAbilityContext
   * @param permissions 需要申请的权限
   * @returns 被拒绝的权限
   */
  public static async requestPermissionsFromUser(context: common.UIAbilityContext,
    permissions: Array<Permissions>): Promise<Array<Permissions>> {
    //被拒绝授权的数组
    const deniedPermissions: Array<Permissions> = new Array();
    let atManager: abilityAccessCtrl.AtManager = abilityAccessCtrl.createAtManager();
    // requestPermissionsFromUser会判断权限的授权状态来决定是否唤起弹窗
    let data = await atManager.requestPermissionsFromUser(context, permissions)
    let resultPermissions: Array<string> = data.permissions;
    let grantStatus: Array<number> = data.authResults;
    let length: number = grantStatus.length;
    for (let i = 0; i < length; i++) {
      if (grantStatus[i] === abilityAccessCtrl.GrantStatus.PERMISSION_DENIED) {
        // 用户拒绝授权，提示用户必须授权才能访问当前页面的功能，并引导用户到系统设置中打开相应的权限
        deniedPermissions.push(resultPermissions[i] as Permissions);
      }
    }

    return deniedPermissions;
  }

  /**
   * 二次向用户申请授权，直接拉起权限设置弹框，引导用户授予权限
   * @param context
   * @param permissions
   */
  public static requestPermissionOnSetting(context: common.UIAbilityContext, permissions: Array<Permissions>) {
    let atManager: abilityAccessCtrl.AtManager = abilityAccessCtrl.createAtManager();
    atManager.requestPermissionOnSetting(context, permissions);
  }

  /**
   * 获取当前应用的 AccessTokenId
   * @returns AccessTokenId
   */
  public static async getAccessTokenId(): Promise<number> {
    // 获取应用程序的accessTokenID
    let tokenId: number = 0;
    try {
      let bundleInfo: bundleManager.BundleInfo =
        await bundleManager.getBundleInfoForSelf(bundleManager.BundleFlag.GET_BUNDLE_INFO_WITH_APPLICATION);
      let appInfo: bundleManager.ApplicationInfo = bundleInfo.appInfo;
      tokenId = appInfo.accessTokenId;
    } catch (error) {
      // 异常
    }
    return tokenId;
  }
}

LocationParams 、 SelectLocationType

TypeScript

import { ConversationIdentifier } from '@rongcloud/imlib';
import { LocationData } from './LocationData';

export interface LocationParams {
  locationData?: LocationData;
  conId?: ConversationIdentifier;
  flag: number;
}

export enum SelectLocationType {
  Send = 1,
  Look = 2,
}

LocationData

TypeScript

export class LocationData {
  latitude: number = 0.0;
  longitude: number = 0.0;
  name: string = '';
  address?: string = '';
  // 地图的静态图像PixelMap转的base64字符串
  img?: string = '';
}

处理位置消息点击事件

位置消息与位置消息的 UI 定义在了Kit SDK中，所以需要 App 通过设置消息点击事件的方式来处理。 设置消息点击事件，建议在 SDK init之后设置。

TypeScript

let msgClickListener: MessageClickListener = {
  onMessageClick(message) {
    if (message.objectName === LocationMessageObjectName) {
      // 地图消息跳转地图页面查看位置
      let messageContent: LocationMessage = message.content as LocationMessage;
      let locationData: LocationData = new LocationData();
      locationData.latitude = messageContent.latitude;
      locationData.longitude = messageContent.longitude;
      locationData.name = messageContent.poi;
      let param: LocationParams = { locationData: locationData, flag: SelectLocationType.Look }
      // 跳转到查看位置页面
      return true;
    }
    return false;
  }
};
RongIM.getInstance().conversationService().addMessageClickListener(msgClickListener);

定制化

自定义位置消息的 UI

位置消息使用 LocationMessageItemProvider 模板展示在消息列表中。

如果需要调整内置消息样式，需继承 BaseMessageItemProvider<LocationMessage> 自行实现消息展示模板类，详见自定义Provider。

调用 addMessageItemProvider 的接口将该自定义模板提供给 SDK，objectName 传 LocationMessageObjectName。

TypeScript

import { LocationMessageObjectName, RongIM } from "@rongcloud/imkit";

// 注册自定义位置消息 provider 给 IMKit
RongIM.getInstance().conversationService().addMessageItemProvider(LocationMessageObjectName, new CustomLocationMessageItemProvider())