所以我知道这是代码波动，但在整理我的Fragment中的RecyclerView时遇到了问题。我读了一堆教程，每个人似乎都有不同的做事方式。只是无法确定它...所以这是我的代码:
FRAGMENT XML
<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context="com.example.xxxx.listview.CalendarFragment">
<android.support.v7.widget.RecyclerView
android:id="@+id/event_recycle"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:scrollbars="horizontal" />
</FrameLayout>
数据类
data class SectionOrRow(var needTicketing:String?,var eventSponsor:String?,var eventED:String?,var eventSD:String?,var eventTitle:String?,var mysectionName:String?,var isRow:Boolean){
companion object {
public fun createRow(row: String): Unit {
// val ret = SectionOrRow()
// return ret
}
public fun createSection(section: String): Unit {
// val ret = SectionOrRow(null,section,false)
// return ret
}
}
}
片段类
package com.example.XXX.listview
class CalendarFragment : Fragment() {
lateinit var eventInfo: JsonArray<JsonObject>
lateinit var event2Info: JsonArray<JsonObject>
val eventList0 = ArrayList<SectionOrRow>()
val TAG : String= "CalendarFragment"
override fun onCreateView(inflater: LayoutInflater, container: ViewGroup?,
savedInstanceState: Bundle?): View? {
val view : View = inflater.inflate(R.layout.fragment_calendar,container,false)
(activity as MainActivity).getSupportActionBar()?.setTitle("Medfield Calendar")
var event_recycle:RecyclerView = view.findViewById(R.id.event_recycle)
var myUrl:String = "https://www.nosite.com/functions/API/eventsJSON2.php?zip_code=02052"
myUrl.httpGet().responseString { request, response, result ->
//do something with response
when (result){
is Result.Failure -> {
Log.d("Towns",result.toString())
val error = result.getAs<String>()
Log.d("Towns error ",error)
}
is Result.Success -> {
val data = result.getAs<String>()
val events : Parser = Parser()
val eventBuilder: StringBuilder = StringBuilder(data)
val eventsjson = events.parse(eventBuilder) as JsonObject
Log.d("JOO",eventsjson.toString())
var eventList0 = ArrayList<SectionOrRow>()
eventInfo = eventsjson.array("events")!!
Log.d("length array",this.eventInfo.size.toString())
if(this.eventInfo.size<2){
Toast.makeText(context,"There are no categories for this town...", Toast.LENGTH_LONG).show()
}else{
Log.d("type",this.eventInfo.javaClass.name) // kotlin.Double
for (i in eventInfo.indices){
//Log.d("Loops"+i.toString(),eventInfo[i].string("category"))
//Log.d("Loops"+i.toString(),eventInfo[i].string("events2"))
var theCat = eventInfo[i].string("category")
eventList0.add(SectionOrRow(null,null,null,null,null,theCat,false))
var theEvents:JsonArray<JsonObject>? = eventInfo[i].array("events2")
Log.d("MSG1","IS category header"+theCat)
theEvents?.let{
for(x in theEvents.indices){
val needT: String? = theEvents[x].string("news_needsticketing")
val eventSpon: String? = theEvents[x].string("news_sponsor")
val startD: String? = theEvents[x].string("news_start_date")
val endD: String? = theEvents[x].string("news_expiration")
val newsT: String? = theEvents[x].string("news_tile")
eventList0.add(SectionOrRow(needT,eventSpon,endD,startD,newsT,theCat,true))
}
Log.d("MSG2","Are Events")
}
//eventList0.add(SectionOrRow.createRow("City"))
}
}
event_recycle.layoutManager = LinearLayoutManager(context)
event_recycle.hasFixedSize()
event_recycle.adapter = MyEventAdapter(context,eventList0)
Log.d("All Size First",eventList0.size.toString())
//Log.d("FN",nextOne.toString())
// myview.textView3.setText(Html.fromHtml(ownerMessage,Html.FROM_HTML_MODE_LEGACY))
//myview.textView3.setText(myCS)
}
}
}
// Inflate the layout for this fragment
return view
}
inner class MyEventAdapter(context: Context,val theEvents:ArrayList<SectionOrRow>):RecyclerView.Adapter<RecyclerView.ViewHolder>(){
override fun getItemViewType(position: Int): Int {
if(theEvents[position].isRow){
return 0
}else{
return 1
}
}
override fun onBindViewHolder(holder: RecyclerView.ViewHolder, position: Int) {
val item = theEvents.get(position)
if(item.isRow){
val h = holder as RowViewHolder
h.textView.setText(item.mysectionName)
}else{
val h = holder as SectionViewHolder
h.textView.setText(item.eventSD)
}
}
override fun onCreateViewHolder(parent: ViewGroup, viewType: Int): RecyclerView.ViewHolder? {
if(viewType==0) {
val v = LayoutInflater.from(parent.context).inflate(R.layout.calendar_row, parent, false)
return RowViewHolder(v)
}
if(viewType==1){
val v = LayoutInflater.from(parent.context).inflate(R.layout.calendar_section, parent, false)
return SectionViewHolder(v)
}
return null
}
override fun getItemCount(): Int {
Log.d("All Size",theEvents.size.toString())
return theEvents.size
}
inner class RowViewHolder(itemView: View) : RecyclerView.ViewHolder(itemView) {
val textView: TextView
init {
textView = itemView.findViewById<View>(R.id.sectionHead) as TextView
}
}
inner class SectionViewHolder(itemView: View) : RecyclerView.ViewHolder(itemView) {
val textView: TextView
init {
textView = itemView.findViewById<View>(R.id.dateOfEvent) as TextView
}
}
}
}
我得到的错误是:
10-10 09:12:49.239 32612-32612 / com.example.xxxx.listview E / RecyclerView:未连接适配器;跳过布局
因此，看来我无法将适配器连接到回收站 View 。确保还有其他错误，但这是问题之一;)
解决方案
inner class MyEventAdapter(context: Context,val theEvents:ArrayList<SectionOrRow>):RecyclerView.Adapter<RecyclerView.ViewHolder>(){
override fun getItemViewType(position: Int): Int {
Log.d("Current Boolean",theEvents[position].isRow.toString())
if(theEvents[position].isRow){
//true is row
return 1
}else{
return 0
}
}
override fun onBindViewHolder(holder: RecyclerView.ViewHolder, position: Int) {
val item = theEvents.get(position)
Log.d("Current Item",item.toString())
if(item.isRow){
val h = holder as RowViewHolder
val s = java.text.SimpleDateFormat("EEE\nMM/dd")
val format = s.format(Integer.parseInt(item.eventSD) * 1000L)
h.textView.setText(format)
Log.d("Current Title",item.eventTitle.toString())
h.titleView.setText(item.eventTitle)
h.datesView.setText(item.eventED)
h.sponsorView.setText(item.eventSponsor)
if(item.needTicketing=="Y") {
h.ticketView.setText("Ticketing Available")
}else{
h.ticketView.setText("")
}
}else{
val h = holder as SectionViewHolder
h.textView.setText(item.mysectionName)
}
}
override fun onCreateViewHolder(parent: ViewGroup, viewType: Int): RecyclerView.ViewHolder? {
if(viewType==1) {
val v = LayoutInflater.from(parent.context).inflate(R.layout.calendar_row, parent, false)
v.setOnClickListener(object: View.OnClickListener {
override fun onClick(p0: View?) {
Toast.makeText(
v.context,
"Please Click Set Town to Return to Previous Screen....",
Toast.LENGTH_SHORT
).show()
}
})
return RowViewHolder(v)
}
if(viewType==0){
val v = LayoutInflater.from(parent.context).inflate(R.layout.calendar_section, parent, false)
return SectionViewHolder(v)
}
return null
}
override fun getItemCount(): Int {
Log.d("All Size",theEvents.size.toString())
return theEvents.size
}
inner class RowViewHolder(itemView: View) : RecyclerView.ViewHolder(itemView) {
var textView: TextView
var titleView: TextView
var datesView: TextView
var sponsorView: TextView
var ticketView: TextView
init {
textView = itemView.findViewById<View>(R.id.dateOfEvent) as TextView
titleView = itemView.findViewById<View>(R.id.rowTitle) as TextView
datesView = itemView.findViewById<View>(R.id.rowDates) as TextView
sponsorView = itemView.findViewById<View>(R.id.rowSponsor) as TextView
ticketView = itemView.findViewById<View>(R.id.rowTicketing) as TextView
}
}
inner class SectionViewHolder(itemView: View) : RecyclerView.ViewHolder(itemView) {
var textView: TextView
init {
textView = itemView.findViewById<View>(R.id.sectionHead) as TextView
}
}
}
最佳答案
在RecyclerViewAdapter中的override fun onViewCreated中调用Fragment类
override fun onViewCreated(view: View?, savedInstanceState: Bundle?) {
super.onViewCreated(view, savedInstanceState)
val recyclerView=view?.findViewById(R.id.your_recycler_view) as RecyclerView
recyclerView.layoutManager=LinearLayoutManager(context, LinearLayout.VERTICAL,false)
var yourData=ArrayList<YourDataClass>()
yourData.add(YourDataClass("passYourData"))
val yourAdapterClassVariableName=YourRecyclerViewAdapterClass(yourData)
recyclerView.adapter=yourAdapterClassVariableName
}
关于view - 我似乎无法整理我的Kotlin Recycler多 View 代码，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/46667702/