Android binding.list.addAll（）不适用于数据绑定，也使用了binding.executePendingBindings（），但ui未更新
我不熟悉数据绑定。我的示例很简单，我在recyclerview中添加了一些静态数据，点击按钮一段时间后，我在recyclerview中添加了一些其他数据 所以，对于列表大小为0的情况，第一次可以正常工作，第二次添加数据时，我使用了Android binding.list.addAll（）不适用于数据绑定，也使用了binding.executePendingBindings（），但ui未更新,android,kotlin,android-databinding,Android,Kotlin,Android Databinding,我不熟悉数据绑定。我的示例很简单，我在recyclerview中添加了一些静态数据，点击按钮一段时间后，我在recyclerview中添加了一些其他数据 所以，对于列表大小为0的情况，第一次可以正常工作，第二次添加数据时，我使用了addAll（）和executePendingBindings（），但它不会在ui中反映新数据 if(binding.list?.size==0){ binding.list = it }else{ binding.list?.addAll(it) } bind
addAll（）executePendingBindings（）if(binding.list?.size==0){
binding.list = it
}else{
binding.list?.addAll(it)
}
binding.executePendingBindings()
executePendingBinding（）if（binding.list？.size==0）{
binding.list=it
}否则{
var old_newdata:ArrayList=（binding？.list！！+it）作为ArrayList
binding.list=old\u newdata
}
class MainActivity : AppCompatActivity(), ListActionHandler {
private val binding by lazy { ActivityMainBinding.inflate(layoutInflater) }
private lateinit var viewModel: MainViewModel
override fun onCreate(savedInstanceState: Bundle?) {
super.onCreate(savedInstanceState)
setContentView(binding.root)
viewModel = ViewModelProviders.of(this).get(MainViewModel::class.java)
binding.viewModel = viewModel
binding.list = ArrayList()
binding.itemclickHandler = this
startObserving()
}
private fun startObserving() {
Handler().postDelayed(Runnable {
var mutableList = ArrayList<Person>()
mutableList.add(Person("Mansi Shah", "User001", 0, ""))
mutableList.add(Person("Muuni Shah", "User002", 1, ""))
mutableList.add(Person("Alpa Shah", "User003", 0, ""))
mutableList.add(Person("Solani Shah", "User004", 1, ""))
mutableList.add(Person("Menka Shah", "User005", 0, ""))
mutableList.add(Person("Misri Shah", "User006", 0, ""))
mutableList.add(Person("Moti Shah", "User007", 1, ""))
mutableList.add(Person("Khevana Shah", "User008", 1, ""))
//binding.list?.addAll(mutableList)
viewModel.setListData(mutableList)
}, 10000)
viewModel.mutablelistData?.observe(this, Observer {
it?.let {
//binding.list = it
if (binding.list?.size == 0) {
binding.list = it
} else {
// todo: working without execute binding and without addAll, but with =
// var old_newdata:ArrayList<Person> = (binding?.list!!+it) as ArrayList<Person>
// binding.list = old_newdata
//todo : Not working with execute binding , so need to notify adapter
//binding.list?.addAll(it)
//binding.executePendingBindings()
val startposition = binding.list!!.size
binding.list?.addAll(it)
binding.rvPerson.adapter?.notifyItemRangeChanged(startposition, it.size)
}
}
})
}
override fun btnClick(position: Int) {
val item = binding.list?.get(position)
item?.let {
when (item.follow_status) {
0 -> {
val item1 = binding.list?.get(position)?.copy(follow_status = 1)
viewModel.mutablelistData.value?.set(position, item1!!)
binding.rvPerson.adapter?.notifyItemChanged(position, item1!!)
//binding.rvPerson.adapter?.notifyDataSetChanged()
}
1 -> {
val item1 = binding.list?.get(position)?.copy(follow_status = 0)
viewModel.mutablelistData.value?.set(position, item1!!)
binding.rvPerson.adapter?.notifyItemChanged(position, item1!!)
// viewModel.mutablelistData.value?.set(position, item1!!)
}
else -> {
val item1 = binding.list?.get(position)?.copy(follow_status = 0)
viewModel.mutablelistData.value?.set(position, item1!!)
binding.rvPerson.adapter?.notifyItemChanged(position, item1!!)
// viewModel.mutablelistData.value?.set(position, item1!!)
}
}
}
}
override fun btnAddClick() {
var mutableList = ArrayList<Person>()
mutableList.add(Person("Denma Shah", "User009", 0, ""))
mutableList.add(Person("Irish Shah", "User0010", 1, ""))
mutableList.add(Person("Mangolia Shah", "User0011", 0, ""))
mutableList.add(Person("Lily Shah", "User0012", 1, ""))
mutableList.add(Person("Bloom Shah", "User0013", 0, ""))
mutableList.add(Person("Iva Shah", "User0014", 0, ""))
mutableList.add(Person("Ishika Shah", "User0015", 1, ""))
mutableList.add(Person("Oliver Shah", "User0016", 1, ""))
//old data
// mutableList.addAll(viewModel.getListData())
viewModel.setListData(mutableList)
}
}
class ListDataAdpater(
private val listData: ArrayList<Person>,
private val clickHandler: ListActionHandler
) : RecyclerView.Adapter<ListDataAdpater.ViewHolder>() {
private var binding: ListItemDataBinding? = null
inner class ViewHolder(val binding: ListItemDataBinding) :
RecyclerView.ViewHolder(binding.root) {
init {
setIsRecyclable(true)
}
fun bind(data: Person) {
binding?.listItemData = data
binding?.clickHandler = clickHandler
}
}
override fun onCreateViewHolder(parent: ViewGroup, viewType: Int): ViewHolder {
binding = ListItemDataBinding.inflate(LayoutInflater.from(parent.context), parent, false)
return ViewHolder(binding!!)
}
override fun onBindViewHolder(holder: ViewHolder, position: Int) {
holder.bind(listData[position])
holder.binding.position = position
}
override fun getItemCount(): Int {
return listData.size
}
}
<?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"
xmlns:bind="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools">
<data>
<import type="android.view.View" />
<variable
name="listItemData"
type="com.example.databindingdemo.model.Person" />
<variable
name="clickHandler"
type="com.example.databindingdemo.actionhandler.ListActionHandler" />
<variable
name="position"
type="int" />
</data>
<!-- <LinearLayout
android:layout_width="match_parent"
android:layout_height="@dimen/_10sdp"
android:orientation="vertical"
android:visibility="gone"/>-->
<androidx.constraintlayout.widget.ConstraintLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:background="@android:color/black"
android:padding="@dimen/_2sdp">
<androidx.appcompat.widget.AppCompatImageView
android:id="@+id/imgUserSeach"
android:layout_width="@dimen/_58sdp"
android:layout_height="@dimen/_58sdp"
android:adjustViewBounds="true"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent"
bind:roundedCornersRad="@{`3`}"
bind:url="@{listItemData==null?``:listItemData.url}" />
<LinearLayout
android:layout_width="0dp"
android:layout_height="wrap_content"
android:orientation="horizontal"
android:paddingStart="@dimen/_5sdp"
android:paddingEnd="@dimen/_5sdp"
android:weightSum="3"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toEndOf="@+id/imgUserSeach"
app:layout_constraintTop_toTopOf="parent">
<RelativeLayout
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_gravity="center_horizontal"
android:layout_weight="2">
<androidx.appcompat.widget.AppCompatTextView
android:id="@+id/tvUserName"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:ellipsize="end"
android:fontFamily="@font/montserrat_medium"
android:letterSpacing="0.02"
android:lineSpacingExtra="8sp"
android:lines="1"
android:text="@{listItemData.full_name}"
android:textColor="@android:color/white"
android:textSize="13.3sp"
tools:text="Mansi Shah" />
<!-- android:onClick="@{(v)->searchItemHandler.onItemClick(searchData)}"-->
<androidx.appcompat.widget.AppCompatTextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_below="@+id/tvUserName"
android:layout_marginTop="@dimen/_8sdp"
android:ellipsize="end"
android:fontFamily="@font/montserrat_medium"
android:letterSpacing="0.02"
android:lineSpacingExtra="11.3sp"
android:lines="1"
android:text="@{listItemData.username}"
android:textColor="#80ffffff"
android:textSize="10sp"
tools:text="User001" />
<androidx.appcompat.widget.AppCompatCheckBox
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_below="@+id/tvUserName"
android:layout_alignParentEnd="true"
android:layout_alignParentRight="true" />
</RelativeLayout>
<RelativeLayout
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_gravity="center_horizontal"
android:layout_weight="1">
<androidx.appcompat.widget.AppCompatTextView
android:id="@+id/btnFollow"
style="@style/buttonTheme"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_alignParentEnd="true"
android:layout_alignParentRight="true"
android:layout_centerVertical="true"
android:background="@{listItemData.follow_status == 0?@drawable/cyan_button: @drawable/grey_button}"
android:ellipsize="end"
android:lineSpacingExtra="4.5sp"
android:lines="1"
android:onClick="@{(v)->clickHandler.btnClick(position)}"
android:text="@{listItemData.follow_status == 0? @string/follow : @string/following}" />
</RelativeLayout>
</LinearLayout>
<View
android:id="@+id/vdivider"
android:layout_width="match_parent"
android:layout_height="@dimen/_1sdp"
android:layout_marginTop="@dimen/_10sdp"
android:background="#8b9096"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="@+id/imgUserSeach" />
</androidx.constraintlayout.widget.ConstraintLayout>
</layout>
@JvmStatic // add this line !!
@BindingAdapter(value = ["bind:list", "bind:clickHandler"], requireAll = false)
fun bindAdapter(view: RecyclerView, list: ArrayList<Person>?, handler: ListActionHandler) {
list?.let {
val adapter = ListDataAdpater(list, handler)
view.adapter = adapter
}
}
class MainActivity:AppCompatActivity（），ListActionHandler{
惰性{ActivityMainBinding.inflate（layoutInflater）}的私有val绑定
私有lateinit变量viewModel:MainViewModel
重写创建时的乐趣（savedInstanceState:Bundle？）{
super.onCreate（savedInstanceState）
setContentView（binding.root）
viewModel=ViewModelProviders.of（this.get）（MainViewModel:：class.java）
binding.viewModel=viewModel
binding.list=ArrayList（）
binding.itemclickHandler=此
startObserving（）
}
私人娱乐服务（）{
Handler（）.postDelayed（可运行{
var mutableList=ArrayList（）
添加（Person（“Mansi Shah”，“User001”，0，”）
可变列表。添加（人（“Muuni Shah”，“User002”，1“））
可变列表。添加（Person（“Alpa Shah”，“User003”，0，”）
可变列表。添加（个人（“索拉尼·沙阿”，“用户004”，1，”）
添加（Person（“Menka Shah”，“User005”，0，”）
添加（Person（“Misri Shah”，“User006”，0，”）
添加（Person（“Moti Shah”，“User007”，1，”）
添加（Person（“Khevana Shah”，“User008”，1，”））
//binding.list？.addAll（可变列表）
viewModel.setListData（可变列表）
}, 10000)
viewModel.mutablelistData？观察（此，观察者{
是吗？让我来{
//binding.list=it
if（binding.list？.size==0）{
binding.list=it
}否则{
//todo:在没有执行绑定和addAll的情况下工作，但使用=
//var old_newdata:ArrayList=（binding？.list！！+it）作为ArrayList
//binding.list=old\u newdata
//todo:无法使用执行绑定，因此需要通知适配器
//绑定.list？.addAll（it）
//binding.executePendingBindings（）
val startposition=binding.list！！.size
绑定.list？.addAll（it）
binding.rvPerson.adapter？.notifyItemRange已更改（起始位置，it.size）
}
}
})
}
覆盖趣味btnClick（位置：Int）{
val item=binding.list？.get（位置）
项目？让我们{
时间（项目跟踪状态）{
0 -> {
val item1=绑定。列表？获取（位置）？复制（跟随状态=1）
viewModel.mutablelistData.value？.set（位置，item1！！）
binding.rvPerson.adapter？.notifyItemChanged（位置，item1！！）
//binding.rvPerson.adapter？.notifyDataSetChanged（）
}
1 -> {
val item1=绑定。列表？获取（位置）？。复制（跟随状态=0）
viewModel.mutablelistData.value？.set（位置，item1！！）
binding.rvPerson.adapter？.notifyItemChanged（位置，item1！！）
//viewModel.mutablelistData.value？.set（位置，item1！！）
}
其他->{
val item1=绑定。列表？获取（位置）？。复制（跟随状态=0）
viewModel.mutablelistData.value？.set（位置，item1！！）
binding.rvPerson.adapter？.notifyItemChanged（位置，item1！！）
//viewModel.mutablelistData.value？.set（位置，item1！！）
}
}
}
}
覆盖有趣的btnAddClick（）{
var mutableList=ArrayList（）
添加（Person（“Denma Shah”，“User009”，0，”）
添加（Person（“爱尔兰国王”，“用户0010”，1，”）
添加（Person（“Mangolia Shah”，“User0011”，0，”）
添加（Person（“Lily Shah”，“User0012”，1，”）
添加（Person（“bloomshah”，“User0013”，0，”）
添加（Person（“Iva Shah”，“User0014”，0，”）
添加（Person（“Ishika Shah”，“User0015”，1“”））
添加（Person（“Oliver Shah”，“User0016”，1，”）
//旧数据
//mutableList.addAll（viewModel.getListData（））
viewModel.setListData（可变列表）
}
}
<?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"
xmlns:tools="http://schemas.android.com/tools"
xmlns:bind="http://schemas.android.com/apk/res-auto">
<data>
<import type="android.view.View" />
<import type="java.util.ArrayList"/>
<variable
name="viewModel"
type="com.example.databindingdemo.viewmodel.MainViewModel" />
<variable
name="list"
type="ArrayList<com.example.databindingdemo.model.Person>" />
<variable
name="itemclickHandler"
type="com.example.databindingdemo.actionhandler.ListActionHandler" />
</data>
<androidx.constraintlayout.widget.ConstraintLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context=".MainActivity">
<androidx.appcompat.widget.AppCompatButton
android:id="@+id/btnAdd"
style="@style/buttonTheme"
android:background="@color/colorPrimaryDark"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent"
android:onClick="@{(v)->itemclickHandler.btnAddClick()}"
android:text="ADD"/>
<androidx.appcompat.widget.AppCompatButton
android:id="@+id/btnNext"
style="@style/buttonTheme"
android:background="@color/colorPrimaryDark"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintTop_toTopOf="parent"
android:text="Next"/>
<androidx.recyclerview.widget.RecyclerView
android:id="@+id/rvPerson"
app:layout_constraintTop_toBottomOf="@+id/btnAdd"
app:layout_constraintBottom_toBottomOf="parent"
android:layout_width="match_parent"
android:layout_height="0dp"
android:orientation="vertical"
bind:list="@{list}"
bind:clickHandler="@{itemclickHandler}"
android:visibility="@{list!=null && list.size()>0? View.VISIBLE:View.GONE}"
app:layoutManager="androidx.recyclerview.widget.LinearLayoutManager" />
<TextView
android:id="@+id/no_data"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="No Data in List !!!"
android:visibility="@{list!=null && list.size()>0? View.GONE:View.VISIBLE}"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintLeft_toLeftOf="parent"
app:layout_constraintRight_toRightOf="parent"
app:layout_constraintTop_toTopOf="parent" />
</androidx.constraintlayout.widget.ConstraintLayout>
</layout>
class MainActivity : AppCompatActivity(), ListActionHandler {
private val binding by lazy { ActivityMainBinding.inflate(layoutInflater) }
private lateinit var viewModel: MainViewModel
override fun onCreate(savedInstanceState: Bundle?) {
super.onCreate(savedInstanceState)
setContentView(binding.root)
viewModel = ViewModelProviders.of(this).get(MainViewModel::class.java)
binding.viewModel = viewModel
binding.list = ArrayList()
binding.itemclickHandler = this
startObserving()
}
private fun startObserving() {
Handler().postDelayed(Runnable {
var mutableList = ArrayList<Person>()
mutableList.add(Person("Mansi Shah", "User001", 0, ""))
mutableList.add(Person("Muuni Shah", "User002", 1, ""))
mutableList.add(Person("Alpa Shah", "User003", 0, ""))
mutableList.add(Person("Solani Shah", "User004", 1, ""))
mutableList.add(Person("Menka Shah", "User005", 0, ""))
mutableList.add(Person("Misri Shah", "User006", 0, ""))
mutableList.add(Person("Moti Shah", "User007", 1, ""))
mutableList.add(Person("Khevana Shah", "User008", 1, ""))
//binding.list?.addAll(mutableList)
viewModel.setListData(mutableList)
}, 10000)
viewModel.mutablelistData?.observe(this, Observer {
it?.let {
//binding.list = it
if (binding.list?.size == 0) {
binding.list = it
} else {
// todo: working without execute binding and without addAll, but with =
// var old_newdata:ArrayList<Person> = (binding?.list!!+it) as ArrayList<Person>
// binding.list = old_newdata
//todo : Not working with execute binding , so need to notify adapter
//binding.list?.addAll(it)
//binding.executePendingBindings()
val startposition = binding.list!!.size
binding.list?.addAll(it)
binding.rvPerson.adapter?.notifyItemRangeChanged(startposition, it.size)
}
}
})
}
override fun btnClick(position: Int) {
val item = binding.list?.get(position)
item?.let {
when (item.follow_status) {
0 -> {
val item1 = binding.list?.get(position)?.copy(follow_status = 1)
viewModel.mutablelistData.value?.set(position, item1!!)
binding.rvPerson.adapter?.notifyItemChanged(position, item1!!)
//binding.rvPerson.adapter?.notifyDataSetChanged()
}
1 -> {
val item1 = binding.list?.get(position)?.copy(follow_status = 0)
viewModel.mutablelistData.value?.set(position, item1!!)
binding.rvPerson.adapter?.notifyItemChanged(position, item1!!)
// viewModel.mutablelistData.value?.set(position, item1!!)
}
else -> {
val item1 = binding.list?.get(position)?.copy(follow_status = 0)
viewModel.mutablelistData.value?.set(position, item1!!)
binding.rvPerson.adapter?.notifyItemChanged(position, item1!!)
// viewModel.mutablelistData.value?.set(position, item1!!)
}
}
}
}
override fun btnAddClick() {
var mutableList = ArrayList<Person>()
mutableList.add(Person("Denma Shah", "User009", 0, ""))
mutableList.add(Person("Irish Shah", "User0010", 1, ""))
mutableList.add(Person("Mangolia Shah", "User0011", 0, ""))
mutableList.add(Person("Lily Shah", "User0012", 1, ""))
mutableList.add(Person("Bloom Shah", "User0013", 0, ""))
mutableList.add(Person("Iva Shah", "User0014", 0, ""))
mutableList.add(Person("Ishika Shah", "User0015", 1, ""))
mutableList.add(Person("Oliver Shah", "User0016", 1, ""))
//old data
// mutableList.addAll(viewModel.getListData())
viewModel.setListData(mutableList)
}
}
class ListDataAdpater(
private val listData: ArrayList<Person>,
private val clickHandler: ListActionHandler
) : RecyclerView.Adapter<ListDataAdpater.ViewHolder>() {
private var binding: ListItemDataBinding? = null
inner class ViewHolder(val binding: ListItemDataBinding) :
RecyclerView.ViewHolder(binding.root) {
init {
setIsRecyclable(true)
}
fun bind(data: Person) {
binding?.listItemData = data
binding?.clickHandler = clickHandler
}
}
override fun onCreateViewHolder(parent: ViewGroup, viewType: Int): ViewHolder {
binding = ListItemDataBinding.inflate(LayoutInflater.from(parent.context), parent, false)
return ViewHolder(binding!!)
}
override fun onBindViewHolder(holder: ViewHolder, position: Int) {
holder.bind(listData[position])
holder.binding.position = position
}
override fun getItemCount(): Int {
return listData.size
}
}
<?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"
xmlns:bind="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools">
<data>
<import type="android.view.View" />
<variable
name="listItemData"
type="com.example.databindingdemo.model.Person" />
<variable
name="clickHandler"
type="com.example.databindingdemo.actionhandler.ListActionHandler" />
<variable
name="position"
type="int" />
</data>
<!-- <LinearLayout
android:layout_width="match_parent"
android:layout_height="@dimen/_10sdp"
android:orientation="vertical"
android:visibility="gone"/>-->
<androidx.constraintlayout.widget.ConstraintLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:background="@android:color/black"
android:padding="@dimen/_2sdp">
<androidx.appcompat.widget.AppCompatImageView
android:id="@+id/imgUserSeach"
android:layout_width="@dimen/_58sdp"
android:layout_height="@dimen/_58sdp"
android:adjustViewBounds="true"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent"
bind:roundedCornersRad="@{`3`}"
bind:url="@{listItemData==null?``:listItemData.url}" />
<LinearLayout
android:layout_width="0dp"
android:layout_height="wrap_content"
android:orientation="horizontal"
android:paddingStart="@dimen/_5sdp"
android:paddingEnd="@dimen/_5sdp"
android:weightSum="3"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toEndOf="@+id/imgUserSeach"
app:layout_constraintTop_toTopOf="parent">
<RelativeLayout
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_gravity="center_horizontal"
android:layout_weight="2">
<androidx.appcompat.widget.AppCompatTextView
android:id="@+id/tvUserName"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:ellipsize="end"
android:fontFamily="@font/montserrat_medium"
android:letterSpacing="0.02"
android:lineSpacingExtra="8sp"
android:lines="1"
android:text="@{listItemData.full_name}"
android:textColor="@android:color/white"
android:textSize="13.3sp"
tools:text="Mansi Shah" />
<!-- android:onClick="@{(v)->searchItemHandler.onItemClick(searchData)}"-->
<androidx.appcompat.widget.AppCompatTextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_below="@+id/tvUserName"
android:layout_marginTop="@dimen/_8sdp"
android:ellipsize="end"
android:fontFamily="@font/montserrat_medium"
android:letterSpacing="0.02"
android:lineSpacingExtra="11.3sp"
android:lines="1"
android:text="@{listItemData.username}"
android:textColor="#80ffffff"
android:textSize="10sp"
tools:text="User001" />
<androidx.appcompat.widget.AppCompatCheckBox
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_below="@+id/tvUserName"
android:layout_alignParentEnd="true"
android:layout_alignParentRight="true" />
</RelativeLayout>
<RelativeLayout
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_gravity="center_horizontal"
android:layout_weight="1">
<androidx.appcompat.widget.AppCompatTextView
android:id="@+id/btnFollow"
style="@style/buttonTheme"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_alignParentEnd="true"
android:layout_alignParentRight="true"
android:layout_centerVertical="true"
android:background="@{listItemData.follow_status == 0?@drawable/cyan_button: @drawable/grey_button}"
android:ellipsize="end"
android:lineSpacingExtra="4.5sp"
android:lines="1"
android:onClick="@{(v)->clickHandler.btnClick(position)}"
android:text="@{listItemData.follow_status == 0? @string/follow : @string/following}" />
</RelativeLayout>
</LinearLayout>
<View
android:id="@+id/vdivider"
android:layout_width="match_parent"
android:layout_height="@dimen/_1sdp"
android:layout_marginTop="@dimen/_10sdp"
android:background="#8b9096"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="@+id/imgUserSeach" />
</androidx.constraintlayout.widget.ConstraintLayout>
</layout>
@JvmStatic // add this line !!
@BindingAdapter(value = ["bind:list", "bind:clickHandler"], requireAll = false)
fun bindAdapter(view: RecyclerView, list: ArrayList<Person>?, handler: ListActionHandler) {
list?.let {
val adapter = ListDataAdpater(list, handler)
view.adapter = adapter
}
}
类列表数据适配器(
private val listData:ArrayList，
私有val clickHandler:ListActionHandler
)：RecyclerView.Adapter（）{
私有变量绑定：ListItemDataBinding？=null
内部类ViewHolder（val绑定：ListItemD