HarmonyOS 鸿蒙Next 本地调用蓝牙问题

import abilityAccessCtrl, { Permissions } from ‘@ohos.abilityAccessCtrl’;

import common from ‘@ohos.app.ability.common’;

import { BusinessError } from ‘@ohos.base’;

// 使用UIExtensionAbility：将common.UIAbilityContext 替换为common.UIExtensionContext

import bundleManager from ‘@ohos.bundle.bundleManager’;

async function checkAccessToken(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 = 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) { const err: BusinessError = error as BusinessError; console.error(Failed to get bundle info for self. Code is ${err.code}, message is ${err.message}); } // 校验应用是否被授予权限 try { grantStatus = await atManager.checkAccessToken(tokenId, permission); } catch (error) { const err: BusinessError = error as BusinessError; console.error(Failed to check access token. Code is ${err.code}, message is ${err.message}); } return grantStatus; }

@Entry @Component struct Index { onPageShow(): void { //检测蓝牙权限是否开启 checkAccessToken(‘ohos.permission.USE_BLUETOOTH’) .then((res) => { if (res == -1) { //未授权 let context: common.UIAbilityContext = getContext(this) as common.UIAbilityContext; this.reqPermissionsFromUser(this.permissions, context) } else { //已授权不做任何操作 } }) }

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) { this.bule = true // 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 let context = getContext(this) as common.UIAbilityContext; context.startAbility({ bundleName: ‘com.huawei.hmos.settings’, abilityName: ‘com.huawei.hmos.settings.MainAbility’, uri: ‘application_info_entry’, parameters: { pushParams: ‘com.example.myapplication’ // 应用包名 } }); return; } } // 授权成功 }).catch((err: BusinessError) => { console.error(Failed to request permissions from user. Code is ${err.code}, message is ${err.message}); }) }

permissions: Array<Permissions> = [‘ohos.permission.ACCESS_BLUETOOTH’];

@State bule: boolean = true

build() { Column() {} } }