HarmonyOS NEXT 权限申请系统授权和用户授权权限-原创手记-慕课网

在鸿蒙原生开发中，我们normal级别的证书能够使用的权限分为系统授权权限和用户授权权限

其中系统授权权限只需要在模块的module.json5中requestPermissions中添加name就可以了，不需要reason等信息描述，但用户授权就需要reason和使用方式，同时在使用时还需要向用户弹框申请；下面时定位权限和网络权限的申请

“requestPermissions”: [
{ “name”: “ohos.permission.LOCATION”,
“reason”: “ $KaTeX parse error: Expected 'EOF', got '}' at position 130: \dotslways" } }̲, { "name": "\dots$ string:permissionsReason”,
“usedScene”: {
“abilities”: [
“EntryAbility”
],
“when”:“always”
}
},
{
“name”: “ohos.permission.INTERNET”,
}
]
无论是用户授权的权限还是系统授权的权限，我们再使用相应api接口时，都需要检查以下是否申请了权限，不然有异常的

export async function checkPermissionGrant(permission: Permissions): Promise<abilityAccessCtrl.GrantStatus> {
return new Promise(async (resolve, reject) => {
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;
  CSLogger.info(TAG, `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;
  CSLogger.info(TAG, `Failed to check access token. Code is ${err.code}, message is ${err.message}`);
}
resolve(grantStatus);

});

}

export async function checkPermissions(permissions: Permissions, callback?: Callback): Promise {
return new Promise(async (resolve, reject) => {
// 获取权限状态
checkPermissionGrant(permissions).then((grantStatus: abilityAccessCtrl.GrantStatus) => {
let isGrantStatus: boolean = (grantStatus === abilityAccessCtrl.GrantStatus.PERMISSION_GRANTED);
if (!isGrantStatus) {
// 申请权限
CSLogger.info(TAG, ${permissions} Permission false);
resolve(false);
} else {
// 已经授权，可以继续访问目标操作
CSLogger.info(TAG, ${permissions} Permission true);
resolve(true);
}
})
});
}
检查完权限后，如果是用户授权的权限还需要用户弹框申请

export function reqPermissionsFromUser(permissions: Array, context: common.UIAbilityContext): Promise {
return new Promise(async (resolve, reject) => {
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
await atManager.requestPermissionsFromUser(context, permissions).then((data) => {
CSLogger.info(TAG, requestPermissionsFromUser data:${JSON.stringify(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
      CSLogger.info(TAG, `LOCATION req true, APPROXIMATELY_LOCATION req true`);
      resolve(0);
    } 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
      CSLogger.info(TAG, `请到系统应用“设置”中打开相应的权限。路径：设置 > 隐私 > 权限管理 > 应用 > 目标应用`);
      let err: BusinessError = {
        message: `用户拒绝授权`,
        code: 401,
        name: `用户拒绝授权`
      }
      reject(err);
      return;
    }
  }
}).catch((err: BusinessError) => {
  CSLogger.info(TAG, `Failed to request permissions from user. Code is ${err.code}, message is ${err.message}`);
  reject(err);
})

});
}
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后面会继续补充不足之处。

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