我刚刚实现了我的第一个concatAdapter. 从那时起，当我在搜索字段中输入一些文本时，应用程序会在没有与搜索键匹配的项目时崩溃，如果匹配，则它会返回没有错误的结果。在使用之前concatAdapter没有任何问题。
我是这样设置的
binding.rvHomeItems.layoutManager = LinearLayoutManager(context)
binding.rvHomeItems.setHasFixedSize(true)
adapterMyHomeItemList = HomeItemsListAdapter(requireActivity(), itemsList, newView, items)
adapterBanner = BannerAdapter(requireContext(), offers, remoteImages)
adapterConcat = ConcatAdapter(adapterBanner, adapterMyHomeItemList)
binding.rvHomeItems.adapter = concatAdapter
adapterBanner.notifyDataSetChanged()
adapterConcat.notifyDataSetChanged()
以下是我设置搜索的方式
override fun onCreateOptionsMenu(menu: Menu, inflater: MenuInflater) {
inflater.inflate(R.menu.home_menu, menu)
super.onCreateOptionsMenu(menu, inflater)
val item = menu.findItem(R.id.my_search_bar)
val searchView = item?.actionView as SearchView
searchView.setOnQueryTextListener(object : SearchView.OnQueryTextListener {
override fun onQueryTextSubmit(query: String?): Boolean {
srchTempItemList.clear()
if (query != null) {
if (query.isNotEmpty()) {
srchItemList.forEach {
if (it.label.toLowerCase(Locale.getDefault()).contains(query)) {
srchTempItemList.add(it)
}
binding.rvHomeItems.adapter?.notifyDataSetChanged()
}
if (srchTempItemList.size == 0) {
showCustomAlertDialog()
}
} else {
srchTempItemList.clear()
srchTempItemList.addAll(srchItemList)
binding.rvHomeItems.adapter?.notifyDataSetChanged()
}
}
return false
}
override fun onQueryTextChange(newText: String?): Boolean {
srchTempItemList.clear()
val searchText = newText!!.toLowerCase(Locale.getDefault())
if (searchText.isNotEmpty()) {
srchItemList.forEach {
if (it.label.toLowerCase(Locale.getDefault()).contains(searchText)) {
srchTempItemList.add(it)
}
binding.rvHomeItems.adapter?.notifyDataSetChanged()
}
if (srchTempItemList.size == 0) {
showCustomAlertDialog()
}
} else {
srchTempItemList.clear()
srchTempItemList.addAll(srchItemList)
binding.rvHomeItems.adapter?.notifyDataSetChanged()
}
return false
}
})
}
以下是搜索找到匹配时的错误。在我向下滚动到列表末尾之前，该应用程序不会崩溃或抛出错误。
java.lang.IndexOutOfBoundsException: Index: 6, Size: 6
at java.util.ArrayList.get(ArrayList.java:437)
at com.abc.xyz.ui.adapters.HomeItemsListAdapter.onBindViewHolder(HomeItemsListAdapter.kt:71)
at androidx.recyclerview.widget.RecyclerView$Adapter.onBindViewHolder(RecyclerView.java:7178)
at androidx.recyclerview.widget.RecyclerView$Adapter.bindViewHolder(RecyclerView.java:7258)
at androidx.recyclerview.widget.NestedAdapterWrapper.onBindViewHolder(NestedAdapterWrapper.java:157)
at androidx.recyclerview.widget.ConcatAdapterController.onBindViewHolder(ConcatAdapterController.java:368)
at androidx.recyclerview.widget.ConcatAdapter.onBindViewHolder(ConcatAdapter.java:188)
at androidx.recyclerview.widget.RecyclerView$Adapter.onBindViewHolder(RecyclerView.java:7178)
at androidx.recyclerview.widget.RecyclerView$Adapter.bindViewHolder(RecyclerView.java:7258)
at androidx.recyclerview.widget.RecyclerView$Recycler.tryBindViewHolderByDeadline(RecyclerView.java:6125)
at androidx.recyclerview.widget.RecyclerView$Recycler.tryGetViewHolderForPositionByDeadline(RecyclerView.java:6391)
at androidx.recyclerview.widget.GapWorker.prefetchPositionWithDeadline(GapWorker.java:288)
at androidx.recyclerview.widget.GapWorker.flushTaskWithDeadline(GapWorker.java:345)
at androidx.recyclerview.widget.GapWorker.flushTasksWithDeadline(GapWorker.java:361)
at androidx.recyclerview.widget.GapWorker.prefetch(GapWorker.java:368)
at androidx.recyclerview.widget.GapWorker.run(GapWorker.java:399)
at android.os.Handler.handleCallback(Handler.java:938)
at android.os.Handler.dispatchMessage(Handler.java:99)
at android.os.Looper.loop(Looper.java:246)
at android.app.ActivityThread.main(ActivityThread.java:8633)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:602)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1130)
以下是搜索未找到匹配项时的错误。
java.lang.IndexOutOfBoundsException: Index: 0, Size: 0
at java.util.ArrayList.get(ArrayList.java:437)
at com.abc.xyz.ui.adapters.HomeItemsListAdapter.onBindViewHolder(HomeItemsListAdapter.kt:71)
at androidx.recyclerview.widget.RecyclerView$Adapter.onBindViewHolder(RecyclerView.java:7178)
at androidx.recyclerview.widget.RecyclerView$Adapter.bindViewHolder(RecyclerView.java:7258)
at androidx.recyclerview.widget.NestedAdapterWrapper.onBindViewHolder(NestedAdapterWrapper.java:157)
at androidx.recyclerview.widget.ConcatAdapterController.onBindViewHolder(ConcatAdapterController.java:368)
at androidx.recyclerview.widget.ConcatAdapter.onBindViewHolder(ConcatAdapter.java:188)
at androidx.recyclerview.widget.RecyclerView$Adapter.onBindViewHolder(RecyclerView.java:7178)
at androidx.recyclerview.widget.RecyclerView$Adapter.bindViewHolder(RecyclerView.java:7258)
at androidx.recyclerview.widget.RecyclerView$Recycler.tryBindViewHolderByDeadline(RecyclerView.java:6125)
at androidx.recyclerview.widget.RecyclerView$Recycler.tryGetViewHolderForPositionByDeadline(RecyclerView.java:6391)
at androidx.recyclerview.widget.RecyclerView$Recycler.getViewForPosition(RecyclerView.java:6231)
at androidx.recyclerview.widget.RecyclerView$Recycler.getViewForPosition(RecyclerView.java:6227)
at androidx.recyclerview.widget.LinearLayoutManager$LayoutState.next(LinearLayoutManager.java:2330)
at androidx.recyclerview.widget.LinearLayoutManager.layoutChunk(LinearLayoutManager.java:1631)
at androidx.recyclerview.widget.LinearLayoutManager.fill(LinearLayoutManager.java:1591)
at androidx.recyclerview.widget.LinearLayoutManager.onLayoutChildren(LinearLayoutManager.java:668)
at androidx.recyclerview.widget.RecyclerView.dispatchLayoutStep2(RecyclerView.java:4230)
at androidx.recyclerview.widget.RecyclerView.onMeasure(RecyclerView.java:3630)
at android.view.View.measure(View.java:27131)
at android.widget.RelativeLayout.measureChildHorizontal(RelativeLayout.java:735)
at android.widget.RelativeLayout.onMeasure(RelativeLayout.java:481)
at android.view.View.measure(View.java:27131)
at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:7951)
at android.widget.FrameLayout.onMeasure(FrameLayout.java:194)
at android.view.View.measure(View.java:27131)
at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:7951)
at android.widget.LinearLayout.measureChildBeforeLayout(LinearLayout.java:1552)
at android.widget.LinearLayout.measureVertical(LinearLayout.java:842)
at android.widget.LinearLayout.onMeasure(LinearLayout.java:721)
at android.view.View.measure(View.java:27131)
at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:7951)
at androidx.coordinatorlayout.widget.CoordinatorLayout.onMeasureChild(CoordinatorLayout.java:760)
at androidx.coordinatorlayout.widget.CoordinatorLayout.onMeasure(CoordinatorLayout.java:833)
at android.view.View.measure(View.java:27131)
at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:7951)
at android.widget.FrameLayout.onMeasure(FrameLayout.java:194)
at androidx.appcompat.widget.ContentFrameLayout.onMeasure(ContentFrameLayout.java:145)
at android.view.View.measure(View.java:27131)
at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:7951)
at android.widget.LinearLayout.measureChildBeforeLayout(LinearLayout.java:1552)
at android.widget.LinearLayout.measureVertical(LinearLayout.java:842)
at android.widget.LinearLayout.onMeasure(LinearLayout.java:721)
at android.view.View.measure(View.java:27131)
at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:7951)
at android.widget.FrameLayout.onMeasure(FrameLayout.java:194)
at android.view.View.measure(View.java:27131)
at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:7951)
at android.widget.LinearLayout.measureChildBeforeLayout(LinearLayout.java:1552)
at android.widget.LinearLayout.measureVertical(LinearLayout.java:842)
2021-12-04 01:51:08.641 4793-4793/com.abc.xyz E/AndroidRuntime: at android.widget.LinearLayout.onMeasure(LinearLayout.java:721)
at android.view.View.measure(View.java:27131)
at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:7951)
at android.widget.FrameLayout.onMeasure(FrameLayout.java:194)
at com.android.internal.policy.DecorView.onMeasure(DecorView.java:1173)
at android.view.View.measure(View.java:27131)
at android.view.ViewRootImpl.performMeasure(ViewRootImpl.java:4187)
at android.view.ViewRootImpl.measureHierarchy(ViewRootImpl.java:2936)
at android.view.ViewRootImpl.performTraversals(ViewRootImpl.java:3204)
at android.view.ViewRootImpl.doTraversal(ViewRootImpl.java:2618)
at android.view.ViewRootImpl$TraversalRunnable.run(ViewRootImpl.java:9971)
at android.view.Choreographer$CallbackRecord.run(Choreographer.java:1010)
at android.view.Choreographer.doCallbacks(Choreographer.java:809)
at android.view.Choreographer.doFrame(Choreographer.java:744)
at android.view.Choreographer$FrameDisplayEventReceiver.run(Choreographer.java:995)
at android.os.Handler.handleCallback(Handler.java:938)
at android.os.Handler.dispatchMessage(Handler.java:99)
at android.os.Looper.loop(Looper.java:246)
at android.app.ActivityThread.main(ActivityThread.java:8633)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:602)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1130)
编辑：
我现在注意到的是，它不仅在找不到匹配项时发生，而且它也会发生，假设在搜索中找到 10 个项目，当我向下滚动到 recyclerview 的末尾时，应用程序崩溃。
适配器，
open class HomeItemsListAdapter(
private val context: Context, private var list: ArrayList<Products>, private val newView: String, private val cartItems: ArrayList<Cart>
) : RecyclerView.Adapter<RecyclerView.ViewHolder>() {
private var onClickListener: OnClickListener? = null
override fun onCreateViewHolder(parent: ViewGroup, viewType: Int): RecyclerView.ViewHolder {
return MyViewHolder(
ItemHomeListViewLayoutBinding.inflate(
LayoutInflater.from(
parent.context
), parent, false
)
)
}
@SuppressLint("SetTextI18n")
override fun onBindViewHolder(holder: RecyclerView.ViewHolder, position: Int) {
val model = list[position]
if (holder is MyViewHolder) {
if (holder.binding.ivItemImage.visibility == View.INVISIBLE) {
holder.binding.ivItemImage.visibility = View.VISIBLE
}
GlideLoader(context).loadPicture(
model.image, holder.binding.ivItemImage
)
}
override fun getItemCount(): Int {
return list.size
}
fun setOnClickListener(onClickListener: OnClickListener) {
this.onClickListener = onClickListener
}
interface OnClickListener {
fun onClick(position: Int, product: Products)
}
private class MyViewHolder(val binding: ItemHomeListViewLayoutBinding) : RecyclerView.ViewHolder(binding.root)
}