是否支持在应用后台获取剪切板数据

//申请剪切板权限 
import { abilityAccessCtrl, common, Permissions } from '@kit.AbilityKit'; 
import { BusinessError } from '@kit.BasicServicesKit'; 
 
@Entry 
@Component 
struct Index { 
  permission_state: boolean = false; 
  @State message: string = 'Hello World'; 
 
  reqPermissionsFromUser(permissions: Array<Permissions>) { 
    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; 
          console.info('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 
          console.error("user did not grant!") 
          this.permission_state = false; 
          console.info('申请权限失败'); 
        } 
      } 
    }).catch((err: BusinessError) => { 
    }) 
  } 
 
  aboutToAppear(): void { 
    const permissions: Array<Permissions> = ['ohos.permission.READ_PASTEBOARD']; 
    this.reqPermissionsFromUser(permissions) 
  } 
 
  build() { 
    RelativeContainer() { 
      Text(this.message) 
        .id('HelloWorld') 
        .fontSize(50) 
        .fontWeight(FontWeight.Bold) 
        .alignRules({ 
          center: { anchor: '__container__', align: VerticalAlign.Center }, 
          middle: { anchor: '__container__', align: HorizontalAlign.Center } 
        }) 
    } 
    .height('100%') 
    .width('100%') 
  } 
}