我正在使用多级数据进行recyclerview，将数据输入到子适配器中时出现问题。出现错误，例如“无法将模型强制转换为java.util.ArrayList android”
我的json
[{
"header" : "buah air",
"sub" : {
"warna" : "merah",
"jenis" : "air"
}
},{
"header" : "buah serat",
"sub" : {
"warna" : "hijau",
"jenis" : "serat"
}
}]
我的模特
data class mTOP (
val header : String,
@SerializedName("sub") val sub : mSubTOP
)
data class mSubTOP(
val warna : String,
val jenis : String
)
我的MainActivity
val adapter = adapter_top(response!!.body() as ArrayList<mTOP>)
rv.adapter = adapter
我的adapter_top（在这里发生错误）
override fun onBindViewHolder(holder: adapter_top.ViewHolder, position: Int) {
holder.tvHeader?.text = Datane[position].header
holder.rvList?.layoutManager = LinearLayoutManager(holder.rvList.context, LinearLayout.VERTICAL, false)
var adapterSub = adapter_sub(Datane[position].sub as ArrayList<mSubTOP>)
holder.rvList?.adapter = adapterSub
}
我的adapter_sub
class adapter_sub(val Datane: ArrayList<mSubTOP>): RecyclerView.Adapter<adapter_sub.ViewHolder>() {
}
答案 0 :(得分：0)
因为根本不是ArrayList ：）您必须使用一个元素创建一个列表：
adapter_sub(arrayListOf(Datane[position].sub))
答案 1 :(得分：0)
这完成了我的adapter_sub
class adapter_sub(val Datane: ArrayList<mSubTOP>): RecyclerView.Adapter<adapter_sub.ViewHolder>() {
override fun onBindViewHolder(holder: adapter_sub.ViewHolder, position: Int) {
val location = Datane[position]
holder.tvName?.text = location.warna
holder.tvHobi?.text = location.jenis
}
override fun onCreateViewHolder(parent: ViewGroup, viewType: Int): adapter_sub.ViewHolder {
val v = LayoutInflater.from(parent.context).inflate(R.layout.layout_sub, parent, false)
return ViewHolder(v)
}
override fun getItemCount(): Int {
return Datane.size
}
class ViewHolder(itemView: View): RecyclerView.ViewHolder(itemView) {
val tvName = itemView.findViewById<TextView>(R.id.tvJenis)
val tvHobi = itemView.findViewById<TextView>(R.id.tvWarna)
}
}
答案 2 :(得分：0)
布局activity_main.xml
<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.ConstraintLayout 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"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context=".MainActivity">
<androidx.recyclerview.widget.RecyclerView
android:id="@+id/RvMain"
android:layout_width="0dp"
android:layout_height="0dp"
android:layout_marginBottom="8dp"
android:layout_marginEnd="8dp"
android:layout_marginStart="8dp"
android:layout_marginTop="8dp"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent"
tools:layout_editor_absoluteX="8dp"
tools:layout_editor_absoluteY="8dp" >
</androidx.recyclerview.widget.RecyclerView>
</androidx.constraintlayout.widget.ConstraintLayout>
layout layout_top.xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:orientation="vertical"
android:layout_width="match_parent"
android:layout_height="wrap_content">
<androidx.cardview.widget.CardView
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_margin="5dp">
<LinearLayout
android:orientation="vertical"
android:layout_width="match_parent"
android:layout_height="wrap_content">
<TextView
android:id="@+id/tvHeader"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginLeft="16dp"
android:layout_marginRight="16dp"
android:layout_marginTop="16dp"
android:gravity="center_vertical"
android:text="Date"
android:textAppearance="@style/Base.TextAppearance.AppCompat.Large"
android:textColor="#009688"
android:textSize="18sp" />
<androidx.recyclerview.widget.RecyclerView
android:id="@+id/rvItem"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginEnd="8dp"
android:layout_marginStart="8dp"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent">
</androidx.recyclerview.widget.RecyclerView>
</LinearLayout>
</androidx.cardview.widget.CardView>
</LinearLayout>
layout layout_sub.xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical"
android:layout_width="match_parent"
android:layout_height="wrap_content">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:gravity="center_vertical"
android:orientation="horizontal"
android:padding="10dp">
<TextView
android:id="@+id/locationBadge"
android:layout_width="40dp"
android:layout_height="40dp"
android:background="@drawable/circle_badge"
android:gravity="center_vertical|center_horizontal"
android:text="✓"
android:textColor="#fff"
android:textStyle="bold" />
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="vertical"
android:padding="10dp">
<TextView
android:id="@+id/tvWarna"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:gravity="center_vertical"
android:text="Name"
android:textSize="18sp" />
<TextView
android:id="@+id/tvJenis"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:gravity="center_vertical"
android:text="Address"
android:textSize="16sp" />
</LinearLayout>
</LinearLayout>
</LinearLayout>
答案 3 :(得分：0)
这是我的堆栈跟踪
10-20 06:24:08.445 11624-11624/br.com.mirabilis.jambu_air E/AndroidRuntime: FATAL EXCEPTION: main
Process: br.com.mirabilis.jambu_air, PID: 11624
android.view.InflateException: Binary XML file line #14: Binary XML file line #14: Error inflating class TextView
at android.view.LayoutInflater.inflate(LayoutInflater.java:543)
at android.view.LayoutInflater.inflate(LayoutInflater.java:427)
at br.com.mirabilis.jambu_air.adapter.adapter_sub.onCreateViewHolder(adapter_sub.kt:23)
at br.com.mirabilis.jambu_air.adapter.adapter_sub.onCreateViewHolder(adapter_sub.kt:13)
at androidx.recyclerview.widget.RecyclerView$Adapter.createViewHolder(RecyclerView.java:6794)
at androidx.recyclerview.widget.RecyclerView$Recycler.tryGetViewHolderForPositionByDeadline(RecyclerView.java:5975)
at androidx.recyclerview.widget.RecyclerView$Recycler.getViewForPosition(RecyclerView.java:5858)
at androidx.recyclerview.widget.RecyclerView$Recycler.getViewForPosition(RecyclerView.java:5854)
at androidx.recyclerview.widget.LinearLayoutManager$LayoutState.next(LinearLayoutManager.java:2230)
at androidx.recyclerview.widget.LinearLayoutManager.layoutChunk(LinearLayoutManager.java:1557)
at androidx.recyclerview.widget.LinearLayoutManager.fill(LinearLayoutManager.java:1517)
at androidx.recyclerview.widget.LinearLayoutManager.onLayoutChildren(LinearLayoutManager.java:612)
at androidx.recyclerview.widget.RecyclerView.dispatchLayoutStep2(RecyclerView.java:3924)
at androidx.recyclerview.widget.RecyclerView.onMeasure(RecyclerView.java:3336)
at android.view.View.measure(View.java:18811)
at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5952)
at android.widget.LinearLayout.measureChildBeforeLayout(LinearLayout.java:1465)
at android.widget.LinearLayout.measureVertical(LinearLayout.java:748)
at android.widget.LinearLayout.onMeasure(LinearLayout.java:630)
at android.view.View.measure(View.java:18811)
at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5952)
at android.widget.FrameLayout.onMeasure(FrameLayout.java:194)
at androidx.cardview.widget.CardView.onMeasure(CardView.java:260)
at android.view.View.measure(View.java:18811)
at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5952)
at android.widget.LinearLayout.measureChildBeforeLayout(LinearLayout.java:1465)
at android.widget.LinearLayout.measureVertical(LinearLayout.java:748)
at android.widget.LinearLayout.onMeasure(LinearLayout.java:630)
at android.view.View.measure(View.java:18811)
at androidx.recyclerview.widget.RecyclerView$LayoutManager.measureChildWithMargins(RecyclerView.java:9119)
at androidx.recyclerview.widget.LinearLayoutManager.layoutChunk(LinearLayoutManager.java:1583)
at androidx.recyclerview.widget.LinearLayoutManager.fill(LinearLayoutManager.java:1517)
at androidx.recyclerview.widget.LinearLayoutManager.onLayoutChildren(LinearLayoutManager.java:612)
at androidx.recyclerview.widget.RecyclerView.dispatchLayoutStep2(RecyclerView.java:3924)
at androidx.recyclerview.widget.RecyclerView.dispatchLayout(RecyclerView.java:3641)
at androidx.recyclerview.widget.RecyclerView.onLayout(RecyclerView.java:4194)
at android.view.View.layout(View.java:16653)
at android.view.ViewGroup.layout(ViewGroup.java:5438)
at androidx.constraintlayout.widget.ConstraintLayout.onLayout(ConstraintLayout.java:1915)
at android.view.View.layout(View.java:16653)
at android.view.ViewGroup.layout(ViewGroup.java:5438)
at android.widget.FrameLayout.layoutChildren(FrameLayout.java:336)
at android.widget.FrameLayout.onLayout(FrameLayout.java:273)
at android.view.View.layout(View.java:16653)
at android.view.ViewGroup.layout(ViewGroup.java:5438)
at androidx.appcompat.widget.ActionBarOverlayLayout.onLayout(ActionBarOverlayLayout.java:444)
at android.view.View.layout(View.java:16653)
at android.view.ViewGroup.layout(ViewGroup.java:5438)
at android.widget.FrameLayout.layoutChildren(FrameLayout.java:336)
at android.widget.FrameLayout.onLayout(FrameLayout.java:273)
at android.view.View.layout(View.java:16653)
at android.view.ViewGroup.layout(ViewGroup.java:5438)
at android.widget.LinearLayout.setCh
10-20 06:24:08.448 11624-11624/br.com.mirabilis.jambu_air E/MQSEventManagerDelegate: failed to get MQSService.
10-20 06:24:08.473 11624-11624/br.com.mirabilis.jambu_air I/Process: Sending signal. PID: 11624 SIG: 9