HarmonyOS TextArea获取焦点

有一个页面由List组成，里面有很多ItemView，然后我的这个页面 还有一个评论输入组件，起名为：CommentPublishBar

代码如下：

@Preview
@Component
export default struct CommentPublishBar {
  @Prop keyboardShow: boolean = false //软键盘当前是否展示
  @Prop showHeight: number = getScreenWidth()
  @State textAreaHeight: number = 0;
  @Prop postData: PostDataBean
  @Prop rid: number = 0;
  @State content: string = ''
  commentPublisher: CommentPublisher = new CommentPublisher()
  @Link commentList: Comment[]

  textInputController: TextAreaController = new TextAreaController()

  aboutToAppear(): void {
  }

  build() {
    Column() {
      Column()
        .backgroundColor(Color.Transparent)
        .width('100%')
        .height(this.keyboardShow ? px2vp(this.showHeight) - 50 - (this.textAreaHeight - 38) : 0)
        .onClick(() => {
          this.closePublish(false)
        })
      Row() {
        TextArea({
          placeholder: '说亿点好听的',
          controller: this.textInputController,
          text: this.content
        })
          .width(this.keyboardShow ? px2vp(getScreenWidth()) - 96 : px2vp(getScreenWidth()) - 32)
          .backgroundColor($r('app.color.BG_2'))
          .borderRadius(18)
          .margin({ left: 16, right: 16 })
          .fontColor($r('app.color.CT_2'))
          .placeholderColor($r('app.color.Text_4'))
          .fontSize(15)
          .padding({ left: 12 })
          .constraintSize({
            minHeight: 38
          })
          .onChange((value) => {
            this.content = value
          })
          .onAreaChange((oldValue, newValue) => {
            if (typeof newValue.height === 'number') {
              this.textAreaHeight = newValue.height
            }
          }
          )
          .expandSafeArea([SafeAreaType.SYSTEM], [SafeAreaEdge.TOP, SafeAreaEdge.BOTTOM])

        if (this.keyboardShow) {
          Text('发布')
            .width(58)
            .height(32)
            .borderRadius(4)
            .backgroundColor($r('app.color.CM_Blue'))
            .textAlign(TextAlign.Center)
            .fontColor($r('app.color.CW'))
            .fontSize(14)
            .onClick(() => {
              this.commentPublisher.localId = systemDateTime.getTime().toString()
              ToastUtils.showToast('评论发送中')
              this.commentPublisher.checkReviewContent(this.postData, this.content, this.postData.id, this.rid, (data: PostReviewResult) => {
                let list: Comment[] = []
                list.push(data.comment)
                for (let item of this.commentList) {
                  list.push(item)
                }
                this.commentList = list
              })
              this.closePublish(true)
            })
        }
      }.width('100%')
      .alignItems(VerticalAlign.Bottom)
      .padding({ top: 6, bottom: 6 })
      .backgroundColor($r('app.color.CB'))
    }
  }

  closePublish(needClearContent: boolean) {
    this.rid = 0
    inputMethod.getInputMethodController().stopInputSession()
    this.getUIContext().getFocusController().clearFocus()
    if (needClearContent) {
      this.content = ''
    }
  }

  getTextAreaHeight() {
  }
}

希望点击itemView可以和直接点击TextArea达到同样的效果，唤起软键盘，TextArea获取焦点，应该怎么做