Adapter Class
--------------
class FilterByDataAdapter(
val filterByData: (ArrayList<String>) -> Unit, val filterByDataRadioBtn: (String) -> Unit
) : RecyclerView.Adapter<FilterByDataAdapter.FilterByDataViewHolder>() {
private lateinit var itemFilterByListBinding: ItemFilterByListBinding
private lateinit var filerByDataList: ArrayList<FilterByItemDataModel>
private lateinit var filterByName: String
var filteredData: ArrayList<String> = arrayListOf()
override fun onCreateViewHolder(parent: ViewGroup, viewType: Int): FilterByDataViewHolder {
itemFilterByListBinding =
ItemFilterByListBinding.inflate(LayoutInflater.from(parent.context), parent, false)
return FilterByDataViewHolder(itemFilterByListBinding)
}
override fun onBindViewHolder(holder: FilterByDataViewHolder, position: Int) {
val filterByDataItem = filerByDataList[position]
filterByDataItem.let {
holder.apply {
this.bindFilterByData(it, filterByName)
}
}
}
override fun getItemCount(): Int {
return filerByDataList.size
}
fun setFilterByDataList(
filterByTimeList: ArrayList<FilterByItemDataModel>, filterName: String
) {
filerByDataList = filterByTimeList
filterByName = filterName
}
inner class FilterByDataViewHolder(itemFilterByListBinding: ItemFilterByListBinding) :
RecyclerView.ViewHolder(itemFilterByListBinding.root) {
fun bindFilterByData(filterByItemDataModel: FilterByItemDataModel, filterByName: String) {
itemFilterByListBinding.filterItemTxt.text = filterByItemDataModel.itemName
validateButtonChecked(filterByName, filterByItemDataModel)
}
private fun validateButtonChecked(
filterByName: String, filterByItemDataModel: FilterByItemDataModel
) {
when (filterByName) {
TIME -> {
itemFilterByListBinding.filterRadioGroup.visibility = View.VISIBLE
itemFilterByListBinding.filterRadioBtn.isChecked = filterByItemDataModel.isChecked
itemFilterByListBinding.filterRadioBtn.setOnCheckedChangeListener { buttonView, isChecked ->
}
}
STATUS, VALIDITY -> {
itemFilterByListBinding.filterCheckBoxBtn.visibility = View.VISIBLE
itemFilterByListBinding.filterCheckBoxBtn.setOnCheckedChangeListener { buttonView, isChecked ->
filteredData = Utils.processCheckBoxItems(
filterByName, isChecked, filterByItemDataModel.itemName.toString()
)
filterByData.invoke(filteredData)
}
}
}
}
}
}
Fragment Class
---------------
class FilterByBottomSheetDialog(private val onShowResultClick: (ArrayList<String>) -> Unit) :
BottomSheetDialogFragment() {
private lateinit var dialogFilterLayoutBinding: DialogFilterLayoutBinding
private lateinit var filterByData: ArrayList<FilterByItemDataModel>
private lateinit var filterName: String
private val filterByItemAdapter by lazy {
FilterByDataAdapter(
{ action -> actionOnFilterByClick(action) },
{ item -> actionOnFilterByRadioBtnClick(item) })
}
override fun onCreateView(
inflater: LayoutInflater, container: ViewGroup?, savedInstanceState: Bundle?
): View? {
dialogFilterLayoutBinding = DataBindingUtil.inflate(
LayoutInflater.from(context), R.layout.dialog_filter_layout, null, false
)
return dialogFilterLayoutBinding.root
}
override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
super.onViewCreated(view, savedInstanceState)
if (::filterByData.isInitialized) {
setFilterByDataRecyclerView(filterByData, filterName)
}
}
private fun setFilterByDataRecyclerView(
filterByTimeList: ArrayList<FilterByItemDataModel>, filterName: String
) {
filterByItemAdapter.setFilterByDataList(getFilterByTimeList(), filterName)
dialogFilterLayoutBinding.filterItemRecyclerView.adapter = filterByItemAdapter
}
fun getFilterByTimeList(): ArrayList<FilterByItemDataModel> {
val timeArrayList = ArrayList<FilterByItemDataModel>()
val data = arrayListOf("week", "month", "year")
for (i in data.indices) {
timeArrayList.add(
FilterByItemDataModel(
itemName = data[i],
isChecked = false
)
)
}
return timeArrayList
}
}
list item xml
---------------
<?xml version="1.0" encoding="utf-8"?>
<layout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto">
<data>
<variable
name="filterItemName"
type="com.xxx.xxxxx.datamodel.FilterByItemDataModel" />
</data>
<androidx.constraintlayout.widget.ConstraintLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginStart="5dp"
android:layout_marginEnd="5dp">
<androidx.appcompat.widget.AppCompatTextView
android:id="@+id/filter_item_txt"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginTop="5dp"
android:layout_marginBottom="5dp"
android:padding="10dp"
android:textColor="@color/txt_black"
android:textSize="14sp"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent" />
<View
android:layout_width="match_parent"
android:layout_height="1dp"
android:layout_marginTop="5dp"
android:background="@color/txt_light_grey"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="@+id/filter_item_txt" />
<RadioGroup
android:id="@+id/filter_radio_group"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:visibility="gone"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintTop_toTopOf="parent">
<androidx.appcompat.widget.AppCompatRadioButton
android:id="@+id/filter_radio_btn"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:padding="5dp"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintTop_toTopOf="parent" />
</RadioGroup>
</androidx.constraintlayout.widget.ConstraintLayout>
</layout>
大家好， 我在回收器视图中检查和取消检查单选按钮时遇到问题。我正在显示数组列表中的数据并将其显示在回收器视图中。但是当我尝试选择时，会选择所有选定的项目，而不是取消选择最后选中的项目。
任何帮助将不胜感激。提前感谢大家。 这是我的代码供参考，
更新列表的整个逻辑将在视图模型中完成，并且通过在适配器中使用不同的内容，这些更改将毫无困难地发生，所以
您触发一个项目的选择 - >更新视图模型中的列表，然后您提交修改后的列表并观察它，然后列表得到更新，尝试一下，如果您需要任何帮助，只需发布您的进度并乐意提供帮助
该问题可能与您处理
FilterByDataAdapter您可以维护一个变量来跟踪当前选定的位置，并在选择新项目时更新它。以下是修改您的
FilterByDataAdapterclass FilterByDataAdapter(
val filterByData: (ArrayList<String>) -> Unit,
val filterByDataRadioBtn: (String) -> Unit
) : RecyclerView.Adapter<FilterByDataAdapter.FilterByDataViewHolder>() {
// ... (other existing code)
private var selectedPosition: Int = RecyclerView.NO_POSITION
override fun onBindViewHolder(holder: FilterByDataViewHolder, position: Int) {
val filterByDataItem = filerByDataList[position]
filterByDataItem.let {
holder.apply {
this.bindFilterByData(it, filterByName, position)
}
}
}
inner class FilterByDataViewHolder(itemFilterByListBinding: ItemFilterByListBinding) :
RecyclerView.ViewHolder(itemFilterByListBinding.root) {
fun bindFilterByData(
filterByItemDataModel: FilterByItemDataModel,
filterByName: String,
position: Int
) {
// ... (other existing code)
when (filterByName) {
TIME -> {
// ... (other existing code)
itemFilterByListBinding.filterRadioBtn.isChecked =
position == selectedPosition
itemFilterByListBinding.filterRadioBtn.setOnClickListener {
if (position != selectedPosition) {
// Clear the previous selection
notifyItemChanged(selectedPosition)
// Update the selected position
selectedPosition = position
// Update the UI for the newly selected item
notifyItemChanged(position)
}
}
}
// ... (other existing code)
}
}
}
}
此修改可确保在
RadioGroupselectedPositionnotifyItemChanged