鸿蒙位置服务

位置服务

1、首先申请权限
在module.json5文件下申请位置权限

 "requestPermissions": [{"name": "ohos.permission.LOCATION",	// 权限名称，为系统已定义的权限"reason": "$string:location_reason",	// 申请权限的原因，当申请权限为user_grant权限时该字段为必填"usedScene": {	// 用于描述权限使用场景，当申请权限为user_grant权限时该字段为必填"abilities": ["EntryAbility"],"when": "always"	// 调用时机（inuse：使用时；always：始终）}},{"name": "ohos.permission.APPROXIMATELY_LOCATION","reason": "$string:location_reason","usedScene": {"abilities": ["EntryAbility"],"when": "always"}}]

$string:location_reason
会爆红，就需要在

文件下定义一下，
2、导入需要的包

import { abilityAccessCtrl, common, Permissions } from '@kit.AbilityKit';
import { BusinessError } from '@kit.BasicServicesKit';
import { geoLocationManager } from '@kit.LocationKit';

3、看一下用户是否授权，没有授权拉起弹窗让用户授权

const permissions: Array<Permissions> = ['ohos.permission.LOCATION'];
// 使用UIExtensionAbility：将common.UIAbilityContext 替换为common.UIExtensionContext
export function reqPermissionsFromUser(permissions: Array<Permissions>, context: common.UIAbilityContext): void {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atManager.requestPermissionsFromUser(context, permissions).then((data) => {let grantStatus: Array<number> = data.authResults;let length: number = grantStatus.length;for (let i = 0; i < length; i++) {if (grantStatus[i] === 0) {// 用户授权，可以继续访问目标操作} else {// 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return;}}// 授权成功}).catch((err: BusinessError) => {console.error(`Failed to request permissions from user. Code is ${err.code}, message is ${err.message}`);})
}

4、把这个方法加到页面启动的时候就查

aboutToAppear(){
// 使用UIExtensionAbility：将common.UIAbilityContext 替换为common.UIExtensionContextconst context: common.UIAbilityContext = getContext(this) as common.UIAbilityContext;reqPermissionsFromUser(permissions, context);
}

5、开始获取当前位置

/*获取当前位置*/
let request: geoLocationManager.SingleLocationRequest = {'locatingPriority': geoLocationManager.LocatingPriority.PRIORITY_LOCATING_SPEED,//位置的优先级'locatingTimeoutMs': 10000//给的延迟，如果超了就显示获取位置失败
}
try {geoLocationManager.getCurrentLocation(request).then((result) => { // 调用getCurrentLocation获取当前设备位置，通过promise接收上报的位置result['locale'] = 'zh'console.log('current location: ' + JSON.stringify(result));}).catch((error:BusinessError) => { // 接收上报的错误码console.error('promise, getCurrentLocation: error=' + JSON.stringify(error));});
} catch (err) {console.error("errCode:" + JSON.stringify(err));
}

6、在添加一个页面就ok了
全部代码

import { abilityAccessCtrl, common, Permissions } from '@kit.AbilityKit';
import { BusinessError } from '@kit.BasicServicesKit';
import { geoLocationManager } from '@kit.LocationKit';const permissions: Array<Permissions> = ['ohos.permission.LOCATION'];
// 使用UIExtensionAbility：将common.UIAbilityContext 替换为common.UIExtensionContext
export function reqPermissionsFromUser(permissions: Array<Permissions>, context: common.UIAbilityContext): void {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atManager.requestPermissionsFromUser(context, permissions).then((data) => {let grantStatus: Array<number> = data.authResults;let length: number = grantStatus.length;for (let i = 0; i < length; i++) {if (grantStatus[i] === 0) {// 用户授权，可以继续访问目标操作} else {// 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return;}}// 授权成功}).catch((err: BusinessError) => {console.error(`Failed to request permissions from user. Code is ${err.code}, message is ${err.message}`);})
}
//持续获取位置
// let request: geoLocationManager.ContinuousLocationRequest= {
//   'interval': 1,
//   'locationScenario': geoLocationManager.UserActivityScenario.NAVIGATION
// }
// let storedLocation: geoLocationManager.Location | null = null;
//
// let locationCallback = (location:geoLocationManager.Location):void => {
//   // 将传入的 location 存储在外部变量中
//   storedLocation = location;
//   // 输出存储的 location 数据
//   console.log('locationCallback: data: ' + JSON.stringify(storedLocation));
// };
//
// try {
//   geoLocationManager.on('locationChange', request, locationCallback);
// } catch (err) {
//   console.error("errCode:" + JSON.stringify(err));
// // }
/*获取当前位置*/
let request: geoLocationManager.SingleLocationRequest = {'locatingPriority': geoLocationManager.LocatingPriority.PRIORITY_LOCATING_SPEED,//位置的优先级'locatingTimeoutMs': 10000//给的延迟，如果超了就显示获取位置失败
}
try {geoLocationManager.getCurrentLocation(request).then((result) => { // 调用getCurrentLocation获取当前设备位置，通过promise接收上报的位置result['locale'] = 'zh'console.log('current location: ' + JSON.stringify(result));}).catch((error:BusinessError) => { // 接收上报的错误码console.error('promise, getCurrentLocation: error=' + JSON.stringify(error));});
} catch (err) {console.error("errCode:" + JSON.stringify(err));
}@Entry
@Component
struct shouQuan {aboutToAppear() {// 使用UIExtensionAbility：将common.UIAbilityContext 替换为common.UIExtensionContextconst context: common.UIAbilityContext = getContext(this) as common.UIAbilityContext;reqPermissionsFromUser(permissions, context);// geoLocationManager.getCurrentLocation(request).then((result) => { // 调用getCurrentLocation获取当前设备位置，通过promise接收上报的位置//   this.message=JSON.stringify(result)//   console.log('current location: ' + JSON.stringify(result));// })}@State location: string = '';@State message: string =''build() {Column() {Button('获取位置信息').onClick( () => {// this.message=JSON.stringify(locationCallback)// this.location=JSON.stringify(request.)});Text('当前位置:').fontSize(20).padding(10);Text(this.message).fontSize(16).padding(10);Text().fontSize(16).padding(10);}}}