HarmonyOS 鸿蒙Next 有没有对应方法可以监听到键盘的显隐

可以用window.on('keyboardHeightChange')监听键盘高度，判断软键盘的显示与隐藏。

文档：https://developer.huawei.com/consumer/cn/doc/harmonyos-references-V5/js-apis-window-V5#onkeyboardheightchange7

可参考以下demo

import window from '@ohos.window';
import { BusinessError } from '@ohos.base';

@Entry
@Component
struct TextAreaExample {
  @State text: string = ''
  @State counterVisible: boolean = false
  @State maxNumber: number = -1
  data:number = 10;
  @State isHideKeybord: boolean = true
  controller: TextAreaController = new TextAreaController()

  aboutToAppear(): void {
    console.log('22222')
  }

  onPageShow(): void {
    console.log('11111')
    this.isHideKeybord = (this.data > 0)? false : true;
    console.log(JSON.stringify(this.data))
    console.log(JSON.stringify(this.isHideKeybord))
    window.getLastWindow(getContext()).then(lastWindow => {
      lastWindow.on('keyboardHeightChange', (data) => {
        console.log(JSON.stringify(data))
        this.isHideKeybord = (data > 0)? false : true;
      })
    }).catch(err => {
      console.error('Failed to enable the listener for keyboard height changes. Cause: ' + JSON.stringify(err));
    })
  }

  build() {
    Column() {
      TextArea({
        text: this.text,
        placeholder: '请输入',
        controller: this.controller
      })
        .placeholderFont({ size: 16, weight: 400 })
        .width(336)
        .height(56)
        .margin(20)
        .fontSize(16)
        .fontColor('#182431')
        .maxLength(10)
        .showCounter(true)
        .backgroundColor('#FFFFFF')
        .onChange((value: string) => {
          this.text = value
        })
    }.width('100%').height('100%').backgroundColor('#F1F3F5')
  }
}