项目场景：

鸿蒙应用拉起地图并开启导航功能

在鸿蒙应用开发中如何去实现拉起第三方的地图并开启导航功能？就以高德地图和百度地图为例，本人总结了一下几个步骤，也包括本人踩过的坑点，附上完整案例，希望能帮到各位

1、配置queryScheme：

鸿蒙中提供了原生能力去判断设备上是否安装了某个应用如下：

 bundleManager.canOpenLink('scheme://应用包名')

在我们去调用这个函数之前，我们需要在module.json5中配置queryScheme，才能去判断此应用是否安装，下图配置了高德地图和百度地图的scheme

注：如何获取其他应用的scheme  ？

bm工具-调试命令-调测调优-系统 - 华为HarmonyOS开发者https://developer.huawei.com/consumer/cn/doc/harmonyos-guides-V5/bm-tool-V5#bm%E5%B7%A5%E5%85%B7%E5%91%BD%E4%BB%A4%E5%88%97%E8%A1%A8

在项目终端中运行 hdc shell  命令 才能运行 bm 命令去查询应用设备已安装的应用信息

再运行以下命令获取所有应用信息

# 显示所有已安装的Bundle名称
bm dump -a

找到包名之后运行以下命令查询相关应用信息

# 查询该应用的详细信息
bm dump -n com.ohos.app -u 100

在终端中ctrl+f 搜scheme 即可找到对应应用的scheme 

2、地址转经纬度

这一步需要使用到一个第三方的工具包：

OpenHarmony三方库中心仓https://ohpm.openharmony.cn/#/cn/detail/@pura%2Fharmony-utils在终端运行安装工具包

ohpm i @pura/harmony-utils  

地址转经纬度函数

// LocationUtil.getAddressFromLocationName 为工具包中的LocationUtill模块下的方法
// address 为地理位置
const location = await LocationUtil.getAddressFromLocationName(address)

 3、拉起地图并启动导航

以下函数可以实现拉起地图并开启导航

  async pullMap(address: string, map: string) {
    const location = await LocationUtil.getAddressFromLocationName(address)
    console.log('location' + JSON.stringify(location))
    if (map === '高德地图') {

      let want: Want = {
        uri: `amapuri://route/plan?dlat=${location.latitude}&dlon=${location.longitude}&dname=${address}&t=0`
      }
      const context = getContext() as common.UIAbilityContext
      context.startAbility(want, (err: BusinessError) => {
        if (err.code) {
          console.error(`业务逻辑错误 startAbility failed,code is ${err.code},message is ${err.message}`);
          return
        }
      })
    } else if (map === '百度地图') {
      let uri = 'baidumap://map/direction?' +
        `destination=latlng:${location.latitude},${location.longitude},|name:${address}&mode=driving`
      let want: Want = { uri: uri }
      const content = getContext() as common.UIAbilityContext
      content.startAbility(want, (err: BusinessError) => {
        if (err.code) {
          hilog.debug(1000, 'test', 'err=' + err)
        }
      })

    }

  }

4、完整案例

import { bundleManager, common, Want } from '@kit.AbilityKit';
import { LocationUtil } from '@pura/harmony-utils';
import { geoLocationManager } from '@kit.LocationKit';
import { BusinessError } from '@kit.BasicServicesKit';
import { hilog } from '@kit.PerformanceAnalysisKit';

@Entry
@Component
struct Index {
  @State address: string = '北京市朝阳区望京街道';
  isInstallGD: boolean = false;
  isInstallBD: boolean = false;
  @State location: geoLocationManager.GeoAddress = {}

  async pullMap(address: string, map: string) {
    const location = await LocationUtil.getAddressFromLocationName(address)
    console.log('location' + JSON.stringify(location))
    if (map === '高德地图') {

      let want: Want = {
        uri: `amapuri://route/plan?dlat=${location.latitude}&dlon=${location.longitude}&dname=${address}&t=0`
      }
      const context = getContext() as common.UIAbilityContext
      context.startAbility(want, (err: BusinessError) => {
        if (err.code) {
          console.error(`业务逻辑错误 startAbility failed,code is ${err.code},message is ${err.message}`);
          return
        }
      })
    } else if (map === '百度地图') {
      let uri = 'baidumap://map/direction?' +
        `destination=latlng:${location.latitude},${location.longitude},|name:${address}&mode=driving`
      let want: Want = { uri: uri }
      const content = getContext() as common.UIAbilityContext
      content.startAbility(want, (err: BusinessError) => {
        if (err.code) {
          hilog.debug(1000, 'test', 'err=' + err)
        }
      })

    }

  }

  build() {
    Column({ space: 20 }) {
      Text(this.address)
        .fontSize(30)
        .fontWeight(500)
      Button('判断是否安装高德地图')
        .onClick(() => {
          this.isInstallGD = bundleManager.canOpenLink('amapuri://com.amap.hmapp')
          AlertDialog.show({
            message: this.isInstallGD ? '高德地图已安装' : '高德地图未安装',
          })
        })
      Button('判断是否安装百度地图')
        .onClick(() => {
          this.isInstallBD = bundleManager.canOpenLink('baidumap://map/direction')
          AlertDialog.show({
            message: this.isInstallBD ? '百度地图已安装' : '百度地图未安装',
          })
        })
      Button('地理位信息转经纬度')
        .onClick(async () => {
          this.location = await LocationUtil.getAddressFromLocationName(this.address)
          AlertDialog.show({
            message: JSON.stringify(this.location),
          })
        })
      Button('跳转百度地图,并开启轨迹')
        .onClick(() => {
          this.pullMap(this.address, '百度地图')
        })

      Button('跳转高德地图,并开启轨迹')
        .onClick(() => {
          this.pullMap(this.address, '高德地图')
        })

    }.width('100%')
    .height('100%')
    .justifyContent(FlexAlign.Center)
  }
}