时间：2021-12-24 11:07:05 | 栏目：Android代码 | 点击：次
1、在数据model中添加了一个selectedModel属性，用来记录当前已选择的筛选项（目前仅支持单选）。
2、当按钮数量小于3个时，按钮最大宽度为屏幕宽度的1/3；小于屏幕宽度时，则为屏幕宽度/按钮数量。
具体代码如下：
var text = model.selectedFilterModel != null
? model.selectedFilterModel.dictValue
: model.name ?? "";
return Container(
padding: EdgeInsets.symmetric(horizontal: 20),
constraints: BoxConstraints(
maxWidth: MediaQuery.of(context).size.width /
(widget.dataList.length > 3 ? 3 : widget.dataList.length),
maxHeight: widget.viewHeight),
color: Colors.white,
child: InkWell(
child: Row(
mainAxisAlignment: MainAxisAlignment.center,
children: [
Text(
text,
maxLines: 1,
overflow: TextOverflow.ellipsis,
style: TextStyle(
fontSize: widget.textSize,
color: model.isSelected
? widget.textSelectColor
: widget.textColor),
),
SizedBox(
width: 4,
),
model.isSelected == true
? Icon(Icons.keyboard_arrow_down,
color: widget.textSelectColor)
: Icon(Icons.keyboard_arrow_up, color: widget.textColor),
],
),
onTap: () {
setState(() {
if (_selectModel != null && _selectModel != model) {
_selectModel.isSelected = false;
}
model.isSelected = !model.isSelected;
_selectModel = model;
});
}));
首先在剩余视图上定义一个背景黑色透明的遮罩层，然后在这层Container上展示listView,listView展示的数据为筛选的具体数据内容。Visibility控制整体视图是否可见，具体代码如下：
visible:
Provider.of<FilterModelProvider>(context).isShowFilterOptionsView ??
false,
child: GestureDetector(
onTap: () {
Provider.of<FilterModelProvider>(context, listen: false)
.hideFilterOptionsView();
},
child: Container(
color: Colors.black54,
child: Container(
margin: EdgeInsets.only(
bottom: SizeFit.screenHeight -
widget.filterButtonViewHeight -
SizeFit.appBarHeight -
listViewHeight +
animation.value),
color: Colors.white,
child: ListView.builder(
padding: EdgeInsets.zero,
itemCount: _dataList.length,
itemBuilder: (BuildContext context, int index) {
return InkWell(
child: Container(
height: widget.listHeight,
child: Column(
mainAxisAlignment: MainAxisAlignment.spaceEvenly,
// crossAxisAlignment: CrossAxisAlignment.center,
children: [
Text(
_dataList[index].dictValue,
overflow: TextOverflow.ellipsis,
maxLines: 1,
style: TextStyle(
fontSize: 16,
color: Colors.black87,
fontWeight: FontWeight.normal),
),
Divider(
height: 1,
indent: 1,
)
],
),
),
onTap: () {
Provider.of<FilterModelProvider>(context, listen: false)
.selectFilterOption(_dataList[index]);
},
);
}),
),
),
),
);