HarmonyOS 鸿蒙Next 本地调用蓝牙问题

可以参考demo：

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 <span class="hljs-keyword">for</span> 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
}
});
      <span class="hljs-keyword">return</span>;
    }
  }

  <span class="hljs-comment">// 授权成功</span>
}).catch((err: BusinessError) =&gt; {
  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() {
}
}
}<button style="position: absolute; padding: 4px 8px 0px; cursor: pointer; top: 8px; right: 8px; font-size: 14px;">复制</button>