权限的申请与校验，该如何处理啊？

权限的申请与校验

HarmonyOS

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2024-05-22 23:04:45

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友人FA

本文主要介绍权限的申请，以及去检验一个应用是否授权。

场景

在应用申请授权时，拉起授权弹框

使用的核心API

授权申请指导

权限校验指导

核心代码解释

核心代码如下：

import abilityAccessCtrl, { PermissionRequestResult, Permissions } from '@ohos.abilityAccessCtrl'; 
import common from '@ohos.app.ability.common'; 
import { BusinessError } from '@ohos.base'; 
import rpc from '@ohos.rpc' 
  
  
const permissions: Array<Permissions> = ['ohos.permission.APPROXIMATELY_LOCATION']; 
  
const permissions1: Array<Permissions> = ['ohos.permission.ACCESS_BLUETOOTH']; 
@Entry 
@Component 
struct ReqPermission { 
  @State message: string = 'Hello World' 
  
  reqPermissionsFromUser(permissions: Array<Permissions>): void { 
    let context: Context = getContext(this) as common.UIAbilityContext; 
    let atManager: abilityAccessCtrl.AtManager = abilityAccessCtrl.createAtManager();//获取访问控制模块 
    // requestPermissionsFromUser会判断权限的授权状态来决定是否唤起弹窗 
    atManager.requestPermissionsFromUser(context, permissions1).then((data: PermissionRequestResult) => { 
      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 
          AlertDialog.show({message:"授权成功"}) 
        } 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}`); 
    }); 
  } 
  
  async onRemoteMessageRequest():Promise<boolean> { 
    let flag:boolean = true; 
    let callerTokenId: number = rpc.IPCSkeleton.getCallingTokenId(); 
    console.log("RpcServer: getCallingTokenId result: " + callerTokenId); 
    let atManager: abilityAccessCtrl.AtManager = abilityAccessCtrl.createAtManager(); 
    try { 
      let res:number = await atManager.checkAccessToken(callerTokenId, "ohos.permission.ACCESS_BLUETOOTH") 
      if(res == -1){ 
        flag = false; 
      }else{ 
        flag = true; 
      } 
    } catch (err) { 
      console.log(`catch err->${JSON.stringify(err)}`); 
    } 
    return flag; 
  } 
  
  build() { 
    Row() { 
      Column() { 
        Text('授权') 
          .textAlign(TextAlign.Center) 
          .fontSize(50) 
          .fontWeight(FontWeight.Bold) 
          .width('100%') 
          .onClick(() => { 
            this.reqPermissionsFromUser(permissions) 
          }) 
        Text('检验') 
          .textAlign(TextAlign.Center) 
          .fontSize(50) 
          .fontWeight(FontWeight.Bold) 
          .width('100%') 
          .onClick(() => { 
            this.onRemoteMessageRequest().then((data)=>{ 
              AlertDialog.show({ message: "==>" + data }) 
            }); 
          }) 
      } 
    } 
    .height('100%') 
  } 
}

实现效果