HarmonyOS 剪切板systemPasteboard.getData接口获取不到数据

import hilog from '@ohos.hilog'; 
import { BusinessError } from '@ohos.base'; 
import abilityAccessCtrl, { Permissions } from '@ohos.abilityAccessCtrl'; 
import common from '@ohos.app.ability.common'; 
import bundleManager from '@ohos.bundle.bundleManager'; 
import pasteboard from '@ohos.pasteboard'; 
 
 
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) { 
    let 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) { 
    let 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 { 
  @State message: string = 'Hello World'; 
  @State msgList: Array<string> = []; 
  // @State oaid: string = ''; 
  @State permission_state: boolean = true; 
 
  reqPermissionsFromUser(permissions: Array<Permissions>): void { 
    let context = getContext(this) as common.UIAbilityContext; 
    let 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) { 
    // 用户授权，可以继续访问目标操作 
    this.permission_state = true; 
    this.msgList.push('申请权限成功'); 
  } 
  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 
    // openPermissionsInSystemSettings(); 
    console.error("user did not grant!") 
    this.permission_state = false; 
    this.msgList.push('申请权限失败'); 
  } 
} 
// 授权成功 
}).catch((err: String) => { 
}) 
} 
 
async getPaste() { 
  const permissions: Array<Permissions> = ['ohos.permission.READ_PASTEBOARD']; 
  let grantStatus1: abilityAccessCtrl.GrantStatus = await checkAccessToken(permissions[0]); 
 
  if (grantStatus1 === abilityAccessCtrl.GrantStatus.PERMISSION_GRANTED) { 
    try { 
      let systemPasteboard: pasteboard.SystemPasteboard = pasteboard.getSystemPasteboard(); 
      systemPasteboard.getData((err: BusinessError, pasteData: pasteboard.PasteData) => { 
        if (err) { 
          console.error('Failed to get PasteData. Cause: ' + err.message); 
          return; 
        } 
        let text: string = pasteData.getPrimaryText(); 
        this.msgList.push('剪贴板内容：'+text); 
      }); 
    } catch (err) { 
      hilog.error(0x0000, 'testTag', '%{public}s', `get oaid by promise catch error: ${err.code} ${err.message}`); 
    } 
  } else { 
    // 申请权限 
    if(this.permission_state) { 
      this.reqPermissionsFromUser(permissions) 
    }else{ 
 
    } 
  } 
} 
 
build() { 
  Column() { 
    Button({ type: ButtonType.Normal, stateEffect: true }) { 
      Text('读取剪贴板内容') 
        .fontColor(Color.White) 
        .fontSize(20) 
    } 
    .borderRadius(8) 
      .width('45%') 
      .height('5%') 
      .backgroundColor(0x317aff) 
      .onClick(() => { 
        this.getPaste() 
        try { 
          let systemPasteboard: pasteboard.SystemPasteboard = pasteboard.getSystemPasteboard(); 
          systemPasteboard.getData((err: BusinessError, pasteData: pasteboard.PasteData) => { 
            if (err) { 
              console.error('Failed to get PasteData. Cause: ' + err.message); 
              return; 
            } 
            let text: string = pasteData.getPrimaryText(); 
            this.msgList.push('剪贴板内容：'+text); 
          }); 
        } catch (err) { 
          hilog.error(0x0000, 'testTag', '%{public}s', `get oaid by promise catch error: ${err.code} ${err.message}`); 
        } 
      }) 
    ForEach(this.msgList, (item: string) => { 
      Text(item) 
        .fontSize(25) 
        .textOverflow({ overflow: TextOverflow.Clip }) 
        .maxLines(10) 
        .width('80%') 
        .margin({ top: 5 }) 
    }) 
  } 
  .width('100%') 
    .height('100%') 
} 
}