应用获取不同权限demo

//获取权限弹框 
async requestPermissions(permission:Permissions[],context:Context): Promise<void> { 
  let atManager:abilityAccessCtrl.AtManager = abilityAccessCtrl.createAtManager(); 
  let result:PermissionRequestResult = await atManager.requestPermissionsFromUser(context,permission); 
  let grantStatus: Array<number> = result.authResults; 
  let length: number = grantStatus.length; 
  for (let i = 0; i < length; i++) { 
    if (grantStatus[i] != 0) { 
      //授权失败 
          return ; 
        } 
  } 
      // 授权成功 
  return; 
} 
//检查权限是否存在 
async onRemoteMessageRequest(permissionName: Permissions):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, permissionName) 
    if(res == -1){ 
      flag = false; 
    }else{ 
      flag = true; 
    } 
  } catch (err) { 
    console.log(`catch err->${JSON.stringify(err)}`); 
  } 
  return flag; 
}
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Button('获取位置信息') 
  .onClick(async ()=>{ 
    //先弹框获取授权 
    await this.reqPermissionInstance.requestPermissions(this.permission,getContext(this)); 
 
    //调用前再判断是否已授权 
    this.reqPermissionInstance.onRemoteMessageRequest("ohos.permission.LOCATION").then((data) =>{ 
      if (data) { 
        //有权限，获取位置信息 
        this.getLocation(); 
      }else { 
        AlertDialog.show({ message: "位置权限未开启" }) 
      } 
    }) 
  }) 
  .margin({top:'16vp'})
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