HarmonyOS 软键盘弹出方式

该问题是软键盘弹出的时候，软键盘会遮挡一部分组件的显示，需求是被遮挡部分想要被软键盘顶起来，在软键盘的上方。软件盘弹出的时候默认是顶起输入框，对于输入框以下的显示组件将被遮挡。可获取窗口内容规避的区域，规避区域的类型是软键盘区域TYPE_KEYBOARD，当软键盘弹出，获取规避区域的高度，通过margin-bottom来设置想要顶起组件。

代码示例：

import window from '@ohos.window';
@Entry
@Component
struct ScrollExample {
  scroller: Scroller = new Scroller()
  private arr: number[] = [0, 1, 2, 3, 4, 5]
  @State scrollHeight: number = 0;
  @State isRebuild: boolean = false;
  @State keyHeight: number =0;
  @State text: string = ''
  aboutToAppear() {
    window.getLastWindow(getContext(this)).then(currentWindow =>{
      let property = currentWindow.getWindowProperties();
      // init window height
      let avoidArea = currentWindow.getWindowAvoidArea(window.AvoidAreaType.TYPE_KEYBOARD);
      this.scrollHeight = px2vp(property.windowRect.height - avoidArea.bottomRect.height);
      // monitor the hiding and display of softKeyboard
      currentWindow.on('avoidAreaChange', async data => {
        if (data.type !== window.AvoidAreaType.TYPE_KEYBOARD) {
          this.keyHeight=avoidArea.bottomRect.height;
          return;
        }
        this.scrollHeight = px2vp(property.windowRect.height - data.area.bottomRect.height);
      })
    })
  }
  build() {
    Stack({ alignContent: Alignment.TopStart }) {
      Column() {
        Scroll(this.scroller) {
          Column() {
            TextInput({ text: this.text, placeholder: 'input your word...' })
              .placeholderFont({ size: 14, weight: 400 })
              .width(320)
              .height(40).margin(200)
              .fontSize(14)
              .fontColor(Color.Black)
              .backgroundColor(Color.White)
            ForEach(this.arr, (item:number) => {
              Text(item.toString())
                .width('90%')
                .height(150)
                .backgroundColor(0xFFFFFF)
                .borderRadius(15)
                .fontSize(16)
                .textAlign(TextAlign.Center)
                .margin({ top: 10 })
            })
          }.width('100%')
        }
        .width('100%').height(this.scrollHeight).layoutWeight(1)
        Text('这是一个测试文本')
          .width('100%')
          .height(50)
          .backgroundColor(Color.Red)
          .margin({bottom: this.scrollHeight})
      }.width('100%').height('100%').justifyContent(FlexAlign.Start)
    }.width('100%').height('100%').backgroundColor(0xDCDCDC)
  }
}