OnClick 在片段的回收器适配器中无法正常工作
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【中文标题】OnClick 在片段的回收器适配器中无法正常工作【英文标题】：OnClick not working properly within recycler adaptor in fragment 【发布时间】：2021-10-01 15:45:43 【问题描述】：你好 *** 社区， 我正在片段内的回收器适配器上工作，我在其上创建了一个点击监听器接口，我在片段中有一个回调。我面临的问题是它有时会工作，但大多数时候它不会产生回调。让我知道我在这做错了什么..
是不是我的视图没有获得点击监听器，因为我添加了视图上未显示的涟漪效果？
或者我需要将监听器放在活动中而不是片段中，我这样做了但没有结果。
我的adatper类的代码
class UserMoneyRequestsAdaptor(
postItems: ArrayList<UserMoneyRequest>?, recItemClick: RecItemClick
) : RecyclerView.Adapter<BaseViewHolder>()
private var isLoaderVisible = false
var mPostItems: ArrayList<UserMoneyRequest>? = postItems
var recItemClick: RecItemClick? = null
init
this.recItemClick = recItemClick
interface RecItemClick
fun onAcceptReqest(position: Int, moneyRequestModel: UserMoneyRequest)
fun onCancelReqest(position: Int, moneyRequestModel: UserMoneyRequest)
companion object
private const val VIEW_TYPE_LOADING = 0
private const val VIEW_TYPE_NORMAL = 1
override fun onCreateViewHolder(parent: ViewGroup, viewType: Int): BaseViewHolder
return when (viewType)
VIEW_TYPE_NORMAL -> ViewHolder(
LayoutInflater.from(parent.context)
.inflate(R.layout.user_request_list_item, parent, false)
)
VIEW_TYPE_LOADING -> ProgressHolder(
LayoutInflater.from(parent.context).inflate(R.layout.item_loading, parent, false)
)
else -> ViewHolder(
LayoutInflater.from(parent.context)
.inflate(R.layout.user_request_list_item, parent, false)
)
override fun onBindViewHolder(holder: BaseViewHolder, position: Int)
holder.onBind(position)
holder.setIsRecyclable(false)
override fun getItemViewType(position: Int): Int
return if (isLoaderVisible)
if (position == mPostItems!!.size - 1) VIEW_TYPE_LOADING else VIEW_TYPE_NORMAL
else
VIEW_TYPE_NORMAL
override fun getItemCount(): Int
return if (mPostItems == null) 0 else mPostItems!!.size
fun addItems(postItems: ArrayList<UserMoneyRequest>)
mPostItems!!.addAll(postItems!!)
notifyDataSetChanged()
fun addLoading()
isLoaderVisible = true
mPostItems!!.add(
UserMoneyRequest(
"-1", "", "", "", "", "", "", "", "", "", "", UserAccount(
"",
"",
"",
"",
Currency("", "", ""),
User("", "")
)
)
)
notifyItemInserted(mPostItems!!.size - 1)
fun addData(listItems: ArrayList<UserMoneyRequest>)
val size = mPostItems!!.size
mPostItems!!.addAll(listItems)
val sizeNew = this.mPostItems!!.size
notifyItemRangeChanged(size, sizeNew)
fun addAll(list: java.util.ArrayList<UserMoneyRequest>)
mPostItems!!.addAll(list)
notifyDataSetChanged()
fun updateItem(pos: Int, paymentLinkListModel: UserMoneyRequest)
notifyItemChanged(pos)
fun addOneItem(postItem: UserMoneyRequest)
mPostItems!!.add(0, postItem)
notifyDataSetChanged()
fun removeOneItem(position: Int)
mPostItems!!.removeAt(position)
notifyDataSetChanged()
fun getlist(positionIndex: Int): UserMoneyRequest
return mPostItems!![positionIndex]
fun removeLoading()
isLoaderVisible = false
val position = mPostItems!!.size - 1
val item: UserMoneyRequest = getItem(position)
if (item.id == "-1")
mPostItems!!.removeAt(position)
notifyItemRemoved(position)
fun clear()
mPostItems!!.clear()
notifyDataSetChanged()
fun getItem(position: Int): UserMoneyRequest
return mPostItems!![position]
inner class ViewHolder internal constructor(itemView: View?) :
BaseViewHolder(itemView)
private val tvStatus = itemView!!.findViewById(R.id.requestStatus) as TextView
val tvAmount = itemView!!.findViewById(R.id.requestAmount) as TextView
private val tvDate = itemView!!.findViewById(R.id.requestDateAndTime) as TextView
private val requestedFrom = itemView!!.findViewById(R.id.requestedFromId) as TextView
private val requestAccept = itemView!!.findViewById(R.id.requestAcceptStatus) as TextView
private val requestDecline = itemView!!.findViewById(R.id.requestDecline) as TextView
private val requestNotes = itemView!!.findViewById(R.id.requestNotes) as TextView
val context: Context = itemView!!.context
override fun clear()
override fun onBind(position: Int)
super.onBind(position)
val moneyRequest = mPostItems!![position]
tvAmount.text = (moneyRequest.amount.toDouble() / 100).toString() + moneyRequest.user_account.currency.code
tvDate.text = getMonthDateTime(moneyRequest.created_at)
requestedFrom.text = moneyRequest.user_account.user!!.email
requestNotes.text = "Notes: " + moneyRequest.notes
setStatus(context, moneyRequest)
//first on clicklistener
requestAccept.setOnClickListener
recItemClick!!.onAcceptReqest(position, moneyRequest)
//second on clicklistener
requestDecline.setOnClickListener
recItemClick!!.onCancelReqest(position, moneyRequest)
@RequiresApi(Build.VERSION_CODES.O)
private fun setStatus(context: Context, moneyRequest: UserMoneyRequest)
when (moneyRequest.status)
"0" ->
tvStatus.text = moneyRequest.statusStr
tvStatus.setBackgroundResource(R.drawable.request_pending_text_bg)
requestAccept.visibility = View.VISIBLE
requestAccept.isClickable = true
requestDecline.visibility = View.VISIBLE
requestDecline.isClickable = true
"1" ->
tvStatus.text = moneyRequest.statusStr
tvStatus.setBackgroundResource(R.drawable.request_active_background_text)
"2" ->
tvStatus.text = moneyRequest.statusStr
tvStatus.setTextColor(
ContextCompat.getColor(
context,
R.color.color_status_rejected
)
)
tvStatus.setBackgroundResource(R.drawable.request_canceled_text_background)
"3" ->
tvStatus.text = moneyRequest.statusStr
tvStatus.setBackgroundResource(R.drawable.request_rejected_text_background)
"4" ->
tvStatus.text = moneyRequest.statusStr
tvStatus.setBackgroundResource(R.drawable.request_completed_text_background)
inner class ProgressHolder internal constructor(itemView: View?) :
BaseViewHolder(itemView)
override fun clear()
我的回收站视图的根元素
<?xml version="1.0" encoding="utf-8"?>
<androidx.cardview.widget.CardView xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_
android:layout_
xmlns:app="http://schemas.android.com/apk/res-auto">
<RelativeLayout
android:id="@+id/relPayoutRequestItem"
android:layout_
android:layout_>
<LinearLayout
android:id="@+id/detailsLayout"
android:layout_
android:layout_
android:layout_alignParentStart="true"
android:layout_marginTop="@dimen/_10sdp"
android:layout_marginBottom="@dimen/_4sdp"
android:layout_toStartOf="@+id/amountLayout"
android:orientation="vertical"
android:padding="@dimen/_6sdp">
<TextView
android:id="@+id/requestedFromId"
android:layout_
android:layout_
android:ellipsize="end"
android:fontFamily="@font/spartanmbbold"
android:lineSpacingExtra="@dimen/_4sdp"
android:lines="1"
android:text="@string/dummy_text_transfers"
android:textColor="@color/text_color"
android:textSize="@dimen/_10sdp"
android:textStyle="bold" />
<TextView
android:id="@+id/requestNotes"
android:layout_
android:layout_
android:layout_marginTop="@dimen/_2sdp"
android:fontFamily="@font/spartanmb_semibold"
android:lineSpacingExtra="@dimen/_4sdp"
android:text="Notes: NIL"
android:textColor="@color/text_color"
android:textSize="@dimen/_10sdp"
android:textStyle="normal" />
</LinearLayout>
<LinearLayout
android:id="@+id/amountLayout"
android:layout_marginTop="@dimen/_14sdp"
android:layout_marginBottom="@dimen/_4sdp"
android:layout_marginLeft="@dimen/_10sdp"
android:layout_marginRight="@dimen/_10sdp"
android:layout_alignParentEnd="true"
android:orientation="vertical"
android:layout_
android:layout_>
<TextView
android:id="@+id/requestAmount"
android:layout_
android:layout_
android:fontFamily="@font/spartan_mb_medium"
android:textStyle="bold"
android:lines="1"
android:ellipsize="end"
android:textSize="@dimen/_10sdp"
android:layout_gravity="center_vertical|end"
android:textColor="@color/text_color"
android:lineSpacingExtra="@dimen/_4sdp"
android:text="@string/dummy_transaction_amount"/>
</LinearLayout>
<RelativeLayout
android:id="@+id/bottomlayout"
android:layout_below="@+id/detailsLayout"
android:layout_
android:layout_
>
<TextView
android:id="@+id/requestDateAndTime"
android:layout_
android:layout_
android:layout_alignParentStart="true"
android:layout_centerVertical="true"
android:layout_marginStart="@dimen/_6sdp"
android:layout_marginTop="@dimen/_12sdp"
android:ellipsize="end"
android:fontFamily="@font/spartan_mb_medium"
android:lineSpacingExtra="@dimen/_6sdp"
android:lines="1"
android:text="@string/dummy_transfer_time"
android:textColor="@color/transaction_time_text_color"
android:textSize="@dimen/_8sdp"
android:textStyle="normal" />
<TextView
android:layout_centerVertical="true"
android:id="@+id/requestStatus"
android:layout_toStartOf="@+id/acceptRipple"
android:layout_
android:layout_
android:fontFamily="@font/spartanmbbold"
android:textStyle="bold"
android:layout_marginEnd="@dimen/_4sdp"
android:lines="1"
android:gravity="center"
android:layout_gravity="end"
android:textSize="@dimen/_8sdp"
android:textColor="@color/white"
android:lineSpacingExtra="@dimen/_6sdp"
android:text="@string/dummy_payment_method"/>
<!-- first view for clicklistener-->
<com.balysv.materialripple.MaterialRippleLayout
android:id="@+id/acceptRipple"
android:layout_
android:layout_
android:layout_centerVertical="true"
android:layout_marginTop="@dimen/_6sdp"
android:layout_marginEnd="@dimen/_4sdp"
app:mrl_rippleAlpha="0.2"
android:layout_toStartOf="@+id/requestRippleDecline"
app:mrl_rippleColor="@color/ripple_black"
app:mrl_rippleHover="true"
app:mrl_rippleOverlay="true"
app:mrl_rippleRoundedCorners="@dimen/_12sdp">
<TextView
android:id="@+id/requestAcceptStatus"
android:layout_
android:layout_
android:fontFamily="@font/spartanmbbold"
android:textStyle="bold"
android:visibility="gone"
android:lines="1"
android:gravity="center"
android:layout_gravity="end"
android:background="@drawable/user_request_active_background_text"
android:textSize="@dimen/_8sdp"
android:textColor="@color/white"
android:lineSpacingExtra="@dimen/_6sdp"
android:text="@string/accept"/>
</com.balysv.materialripple.MaterialRippleLayout>
<!-- second view for clicklistener-->
<com.balysv.materialripple.MaterialRippleLayout
android:id="@+id/requestRippleDecline"
android:layout_
android:layout_
android:layout_alignParentEnd="true"
android:layout_centerVertical="true"
android:layout_marginTop="@dimen/_6sdp"
android:layout_marginEnd="@dimen/_10sdp"
app:mrl_rippleAlpha="0.2"
app:mrl_rippleColor="@color/ripple_black"
app:mrl_rippleHover="true"
app:mrl_rippleOverlay="true"
app:mrl_rippleRoundedCorners="@dimen/_12sdp">
<TextView
android:id="@+id/requestDecline"
android:layout_
android:layout_
android:fontFamily="@font/spartanmbbold"
android:textStyle="bold"
android:lines="1"
android:background="@drawable/user_request_rejected_text_background"
android:gravity="center"
android:visibility="gone"
android:layout_gravity="end"
android:textSize="@dimen/_8sdp"
android:textColor="@color/white"
android:lineSpacingExtra="@dimen/_6sdp"
android:text="@string/decline"/>
</com.balysv.materialripple.MaterialRippleLayout>
</RelativeLayout>
<View
android:layout_marginStart="@dimen/_20sdp"
android:layout_marginEnd="@dimen/_15sdp"
android:layout_marginTop="@dimen/_10sdp"
android:layout_below="@+id/bottomlayout"
android:layout_
android:layout_
android:background="@color/settings_screen_seperator" />
</RelativeLayout>
</androidx.cardview.widget.CardView>
【问题讨论】：
不是答案，但您应该在创建 ViewHolder 时设置侦听器，而不是在将其与数据绑定时。 developer.android.google.cn/courses/android-basics-kotlin/… 完成这门课程，你会为自己弄清楚很多事情 【参考方案1】：请检查下面的代码，它是写在 kotlin 上的，如果你想用 java 写，请告诉我，我会分享。
class LocationAdapter (
private val list: List<Any>,
private val listener: ClickItemListener
) :
RecyclerView.Adapter<LocationAdapter.ViewHolder>()
interface ClickItemListener
fun onClicked(model: Any,position:Int)
override fun onCreateViewHolder(parent: ViewGroup, viewType: Int): ViewHolder
return ViewHolder(ItemLocationBinding.inflate(LayoutInflater.from(parent.context)))
override fun getItemCount(): Int
return list.size
override fun onBindViewHolder(holder: ViewHolder, parentPosition: Int)
Timber.d("onBindViewHolder" + parentPosition)
val model = list.get(parentPosition)
holder.bind.name.text = model.name
holder.itemView.setOnClickListener
listener.onClicked(model,parentPosition)
inner class ViewHolder(private var binding: ItemLocationBinding) :
RecyclerView.ViewHolder(binding.root)
val bind = binding
//call in Activity or Fragment
locationList.adapter = LocationAdapter(sharedViewModel.listOfPlace,
object : LocationAdapter.ClickItemListener
override fun onClicked(model: Any, position: Int)
Timber.d("$position")
)
【讨论】：
【参考方案2】：你可以试试这个方法：
class YourAdapter(private val onItemClick: (String) -> Unit)
...
然后在你的onBindViewHolder
override fun onBindViewHolder(holder: YourViewHolder, position: Int)
holder.bind(
...,
onItemClick,
...,
)
然后在你的视图持有者绑定方法
fun bind(onItemClick: (String) -> Unit)
onItemClick("Whatever")
然后你创建你的适配器有这个：
val yourAdapter =
YourAdapter test ->
//Here you'd get "Whatever" as string since is what you have in your ViewHolder
如果您需要通知 Activity，那么您必须在 Fragment 和 Activity 之间进行回调，或者只是进行强制转换（不推荐）并调用您想要的方法。
这样做的例子（还有更多方法） https://gist.github.com/zacharymikel/40aa61b2ff4d0b1ae267212d7dd965e5 https://tutorial.eyehunts.com/android/activity-and-fragments-communication/
【讨论】：
问题是它在活动中完美地工作，甚至在片段中的一些时间但没有有效.. 您在哪里创建适配器？将它放在super.onViewCreated() 之后的onViewCreated() 中，它应该可以工作。 （在片段中）
我已经检查过了，可能我真的需要改变我的适配器而不是......但我添加了很多东西，比如分页和逻辑。并且单击按钮在列表中并不总是可见。那么我可能没有管理我的回收站视图的状态吗？
我尝试了您的解决方案，但没有帮助【参考方案3】：
问题出在视图中，我使用的是嵌套滚动视图，它没有生成点击监听器
【讨论】：
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