HarmonyOS 需要一个筛选页面的demo

@Entry  
@Component  
struct Index {  
  arr1 = ['黑色品种','有色品种','农产品','化工品种','宏观分析']  
  arr2 = [  
    ['焦炭','玻璃','螺纹钢','动力煤','钢材','焦煤','锰硅','热卷板','铁矿石','线材'],  
    ['黄金','锌','铝','铜','镍','铅','锡','白银','云南省水电','工业硅','碳酸锂'],  
    ['菜籽','豆粕','玉米淀粉','白糖','苹果','棉花','玉米','豆油','豆二','鸡蛋'],  
    ['玻璃','20号胶','橡胶','聚氯乙烯','聚烯烃','塑料','沥青','甲醇','尿素','聚丙烯','纸浆'],  
    ['中证500指数','2年期国债','5年期国债','上证50指数','10年期国债','沪深300指数','股指']  
  ]  
  arr3 = [1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20]  
  @State selectIndex1:number = 0  
  @State selectIndex2:number = 0  
  filterScroller = new Scroller()  
  scroller = new Scroller()  
  build() {  
    Column() {  
      Row() {  
        Text('筛选:')  
          .fontSize(16)  
        List() {  
          ForEach(this.arr1, (name: string, index) => {  
            ListItem() {  
              Stack({alignContent:Alignment.Bottom}){  
                Text(name)  
                  .textAlign(TextAlign.Center)  
                  .fontColor(this.selectIndex1 === index ? $r('app.color.theme_blue') : Color.Black)  
                  .margin({left:$r('app.float.filter_margin_10'),right:$r('app.float.filter_margin_10')})  
                  .height($r('app.float.filter_height'))  
              }  
              .onClick(()=>{  
                this.selectIndex1 = index  
                this.selectIndex2 = 0  
                this.filterScroller.scrollToIndex(0)  
              })  
            }  
          }, (name:string):string => name)  
        }  
        .layoutWeight(1)  
        .scrollBar(BarState.Off)  
        .listDirection(Axis.Horizontal)  
        .margin({left:$r('app.float.filter_margin_10')})  
        .height($r('app.float.filter_height'))  
      }  
      .height($r('app.float.filter_height'))  
      .margin({left:$r('app.float.filter_margin_10')})  
      Divider().color(Color.Gray).height(1)  
      Row() {  
        Text('品种:')  
          .fontSize(16)  
        List({scroller:this.filterScroller}) {  
          ForEach(this.arr2[this.selectIndex1], (name: string, index) => {  
            ListItem() {  
              Column(){  
                Text(name)  
                  .textAlign(TextAlign.Center)  
                  .fontColor(this.selectIndex2 === index ? $r('app.color.theme_blue') : Color.Black)  
                  .margin({left:$r('app.float.filter_margin_10'),right:$r('app.float.filter_margin_10')})  
                  .height($r('app.float.filter_height'))  
                  .border({width:{bottom:index === this.selectIndex2 ? 2 : 0},color:$r('app.color.theme_blue')})  
              }  
              .onClick(()=>{  
                this.selectIndex2 = index  
              })  
            }  
          }, (name:string):string => name)  
        }  
        .layoutWeight(1)  
        .scrollBar(BarState.Off)  
        .listDirection(Axis.Horizontal)  
        .margin({left:$r('app.float.filter_margin_10')})  
        .height($r('app.float.filter_height'))  
      }  
      .height($r('app.float.filter_height'))  
      .margin({left:$r('app.float.filter_margin_10')})  
      Divider().color(Color.Gray).height(1)  
      List({scroller:this.scroller}) {  
        ForEach(this.arr3, (name: number, index) => {  
          ListItem() {  
            Column(){  
              Row(){  
                //图片  
                Image('').width(100).height(60).backgroundColor($r('app.color.theme_blue'))  
                  .borderRadius(5)  
                  .margin({left:$r('app.float.filter_margin_10')})  
                Column(){  
                  Text('永安焦炭早报20240521')  
                    .margin({left:$r('app.float.filter_margin_5'),right:$r('app.float.filter_margin_5'),top:$r('app.float.filter_margin_5')})  
                  Column(){  
                    Flex({justifyContent:FlexAlign.SpaceBetween}){  
                      Text('黑色品种-楠')  
                        .maxLines(1)  
                        .margin({left:$r('app.float.filter_margin_5'),right:$r('app.float.filter_margin_5')})  
                      Text('2024-05-21')  
                        .maxLines(1)  
                        .margin({right:$r('app.float.filter_margin_10')})  
                    }  
                  }  
                  .margin({bottom:$r('app.float.filter_margin_5')})  
                  .justifyContent(FlexAlign.End)  
                  .layoutWeight(1)  
                  .width('100%')  
                }  
                .alignItems(HorizontalAlign.Start)  
                .layoutWeight(1)  
              }  
              .width('100%')  
              Divider().backgroundColor(Color.Gray).margin({left:$r('app.float.filter_margin_10')})  
            }  
            .height(80)  
            .width('100%')  
          }  
        })  
      }  
      .layoutWeight(1)  
    }  
    .width('100%')  
    .height('100%')  
  }  
}
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{  
  "color": [  
    {  
      "name": "start_window_background",  
      "value": "#FFFFFF"  
    },  
    {  
      "name": "theme_blue",  
      "value": "#4f4fd9"  
    }  
  ]  
}
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{  
  "float": [  
    {  
      "name": "filter_height",  
      "value": "40vp"  
    },  
  
    {  
      "name": "filter_margin_10",  
      "value": "10vp"  
    },  
    {  
      "name": "filter_margin_5",  
      "value": "10vp"  
    }  
  ]  
}
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