如何拥有一个ListView / RecyclerView父RecyclerView里面？我有一个父列表，其中包含一些孩子名单在每一个位置 [英] How to have a ListView/RecyclerView inside a parent RecyclerView?. I have a parent list, which contains some child lists at every position
本文介绍了如何拥有一个ListView / RecyclerView父RecyclerView里面？我有一个父列表，其中包含一些孩子名单在每一个位置的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！
问题描述
我想添加一些子视图（列表项），其中涉及到我从一个JSON格式的数据。每个孩子列表父列表项下排。我如何填充它RecyclerView的每一行项目（父项与子项列表中的项目）。 任何建议将是非常有益的，进一步去落实。
我用RecyclerView RecyclerView父行内已经尝试（用于填充子列表），但这里的孩子的看法是不可见的。
下面是我的适配器类了。
//我的父适配器类
公共类数字化prescAdapter延伸RecyclerView.Adapter＆LT;数字化prescAdapter.ListItemViewHolder＆GT; {
私人列表＆LT; prescriptionModal＆GT; prescriptionList;
MedicinesIn prescAdapter适配器;
公开数字化prescAdapter（名单＆LT; prescriptionModal＆GT; prescriptionListModal）{
如果（prescriptionListModal == NULL）{
抛出新抛出：IllegalArgumentException（
prescriptionList不能为空）;
}
这prescriptionList = prescriptionListModal。
}
@覆盖
公共ListItemViewHolder onCreateViewHolder（
ViewGroup中的ViewGroup，INT viewType）{
查看ItemView控件= LayoutInflater。
从（viewGroup.getContext（））。
膨胀（R.layout.item_row_digitised_request，
ViewGroup中，
假）;
返回新ListItemViewHolder（ItemView控件）;
}
@覆盖
公共无效onBindViewHolder（
ListItemViewHolder viewHolder，INT位置）{
prescriptionModal模型= prescriptionList.get（位置）;
。viewHolder prescnum.setText（prescription+ + +位置）;
viewHolder prescNo.setText（prescription：+ model.get prescriptionID（））。
viewHolder.doctorType.setText（类型：+ model.getDoctorType（））;
viewHolder.doctorName.setText（医生：+ model.getDoctorName（））;
viewHolder.patientName.setText（患者：+ model.getPatientName（））;
适配器=新MedicinesIn prescAdapter（model.getLstproduct（））;
viewHolder.lstMedicines.setAdapter（适配器）;
}
@覆盖
公众诠释getItemCount（）{
返回prescriptionList.size（）;
}
公共最后静态类ListItemViewHolder
扩展RecyclerView.ViewHolder {
TextView的prescnum;
TextView的prescNo;
TextView的doctorType;
TextView的patientName;
TextView的doctorName;
复选框全选;
RecyclerView lstMedicines;
公共ListItemViewHolder（查看ItemView控件）{
超（ItemView控件）;
prescnum =（TextView中）itemView.findViewById（R.id. prescnum）;
prescNo =（TextView中）itemView.findViewById（R.id. prescNo）;
doctorType =（TextView中）itemView.findViewById（R.id.doctorType）;
patientName =（TextView中）itemView.findViewById（R.id.patientName）;
doctorName =（TextView中）itemView.findViewById（R.id.doctorName）;
全选=（复选框）itemView.findViewById（R.id.selectAll）;
lstMedicines =（RecyclerView）itemView.findViewById（R.id.lstAllMedicines）;
MyLinearLayoutManager的layoutManager =新MyLinearLayoutManager（itemView.getContext（），LinearLayoutManager.VERTICAL，假）;
lstMedicines.setHasFixedSize（假）;
lstMedicines.setLayoutManager（的layoutManager）;
}
}
}
//我的孩子适配器类
公共类MedicinesIn prescAdapter延伸RecyclerView.Adapter＆LT; MedicinesIn prescAdapter.MedicineListItemViewHolder＆GT; {
名单＆LT; Modal_Product_List＆GT; prescriptionProducts;
公共MedicinesIn prescAdapter（名单＆LT; Modal_Product_List＆GT; prescriptionListProd）{
如果（prescriptionListProd == NULL）{
抛出新抛出：IllegalArgumentException（
prescriptionProductList不能为空）;
}
这prescriptionProducts = prescriptionListProd。
}
@覆盖
公共MedicineListItemViewHolder onCreateViewHolder（
ViewGroup中的ViewGroup，INT viewType）{
查看ItemView控件= LayoutInflater。
从（viewGroup.getContext（））。
膨胀（R.layout.item_row_medicine_productlist，
ViewGroup中，
假）;
返回新MedicineListItemViewHolder（ItemView控件）;
}
@覆盖
公共无效onBindViewHolder（
MedicineListItemViewHolder viewHolder，INT位置）{
Modal_Product_List modelMedicine = prescriptionProducts.get（位置）;
viewHolder.medicineName.setText（modelMedicine.getMedicinename（））;
viewHolder.medQty.setText（modelMedicine.getQuantity（））;
viewHolder.days.setText（30）;
viewHolder.Amount.setText（modelMedicine.getQuantitybasedprice（））;
}
@覆盖
公众诠释getItemCount（）{
返回prescriptionProducts.size（）;
}
公共最后静态类MedicineListItemViewHolder
扩展RecyclerView.ViewHolder {
TextView的medicineName;
的EditText medQty;
TextView的天;
TextView的金额;
复选框selectMe;
公共MedicineListItemViewHolder（查看ItemView控件）{
超（ItemView控件）;
medicineName =（TextView中）itemView.findViewById（R.id.medicineName）;
medQty =（EditText上）itemView.findViewById（R.id.medQty）;
天=（TextView中）itemView.findViewById（R.id.days）;
金额=（TextView中）itemView.findViewById（R.id.amount）;
selectMe =（复选框）itemView.findViewById（R.id.selectMe）;
}
}
}
解决方案
我前几天有这个问题，最后解决了这个问题。所有你需要做的就是 @覆盖布局管理器onMeasure 的功能如下：
CustomLinearLayoutManager
公共类CustomLinearLayoutManager扩展LinearLayoutManager {
私有静态最后字符串变量= CustomLinearLayoutManager.class.getSimpleName（）;
公共CustomLinearLayoutManager（上下文的背景下）{
超（上下文）;
}
公共CustomLinearLayoutManager（上下文的背景下，INT方向，布尔reverseLayout）{
超（背景下，定向，reverseLayout）;
}
私人INT [] mMeasuredDimension =新INT [2];
@覆盖
公共无效onMeasure（RecyclerView.Recycler回收，RecyclerView.State状态，INT widthSpec，诠释heightSpec）{
最终诠释widthMode = View.MeasureSpec.getMode（widthSpec）;
最终诠释heightMode = View.MeasureSpec.getMode（heightSpec）;
最终诠释widthSize = View.MeasureSpec.getSize（widthSpec）;
最终诠释heightSize = View.MeasureSpec.getSize（heightSpec）;
INT宽度= 0;
INT高= 0;
的for（int i = 0; I＆LT; getItemCount（）;我++）{
measureScrapChild（回收，我，View.MeasureSpec.makeMeasureSpec（我，View.MeasureSpec.UNSPECIFIED）
View.MeasureSpec.makeMeasureSpec（ⅰ，View.MeasureSpec.UNSPECIFIED），
mMeasuredDimension）;
如果（getOrientation（）==水平）{
宽度=宽度+ mMeasuredDimension [0];
如果（我== 0）{
高度= mMeasuredDimension [1];
}
} 其他 {
高度=身高+ mMeasuredDimension [1];
如果（我== 0）{
宽度= mMeasuredDimension [0];
}
}
}
开关（widthMode）{
案例View.MeasureSpec.EXACTLY：
宽度= widthSize;
案例View.MeasureSpec.AT_MOST：
案例View.MeasureSpec.UNSPECIFIED：
}
开关（heightMode）{
案例View.MeasureSpec.EXACTLY：
身高= heightSize;
案例View.MeasureSpec.AT_MOST：
案例View.MeasureSpec.UNSPECIFIED：
}
setMeasuredDimension（宽度，高度）;
}
私人无效measureScrapChild（RecyclerView.Recycler回收，INT地位，诠释widthSpec，
INT heightSpec，INT [] measuredDimension）{
尝试 {
查看查看= recycler.getViewForPosition（0）; //修复动态添加时报IndexOutOfBoundsException异常
如果（查看！= NULL）{
RecyclerView.LayoutParams P =（RecyclerView.LayoutParams）view.getLayoutParams（）;
INT childWidthSpec = ViewGroup.getChildMeasureSpec（widthSpec，
getPaddingLeft（）+ getPaddingRight（），p.width）;
INT childHeightSpec = ViewGroup.getChildMeasureSpec（heightSpec，
getPaddingTop（）+ getPaddingBottom（），p.height）;
view.measure（childWidthSpec，childHeightSpec）;
measuredDimension [0] = view.getMeasuredWidth（）+ p.leftMargin + p.rightMargin;
measuredDimension [1] = view.getMeasuredHeight（）+ p.bottomMargin + p.topMargin;
recycler.recycleView（视图）;
}
}赶上（例外五）{
e.printStackTrace（）;
}
}
}
您可以复制和过去的自定义布局管理器如上面和设置您的recyclerview在这样父适配器：
RecyclerView.LayoutManager的layoutManager =新CustomLinearLayoutManager（mContext）;
holder.childRecyclerView.setLayoutManager（的layoutManager）;
记住：不要使用相同的layoutManager父适配器，或将发生错误
I want to add some child Views (List Items), which comes to me from a JSON formatted data. Each child list is under a parent list item row. How can i populate it in RecyclerView for each row item (Parent items with child list items). Any suggestions would be very helpful to go further and implement.
I have tried using RecyclerView within RecyclerView parent row (for populating child lists), but here child views are not visible.
Here is my Adapter class for it.
//My Parent Adapter Class
public class DigitizedPrescAdapter extends RecyclerView.Adapter<DigitizedPrescAdapter.ListItemViewHolder>{
private List<PrescriptionModal> prescriptionList;
MedicinesInPrescAdapter adapter;
public DigitizedPrescAdapter(List<PrescriptionModal> prescriptionListModal) {
if (prescriptionListModal == null) {
throw new IllegalArgumentException(
"PrescriptionList must not be null");
}
this.prescriptionList = prescriptionListModal;
}
@Override
public ListItemViewHolder onCreateViewHolder(
ViewGroup viewGroup, int viewType) {
View itemView = LayoutInflater.
from(viewGroup.getContext()).
inflate(R.layout.item_row_digitised_request,
viewGroup,
false);
return new ListItemViewHolder(itemView);
}
@Override
public void onBindViewHolder(
ListItemViewHolder viewHolder, int position) {
PrescriptionModal model = prescriptionList.get(position);
viewHolder.prescnum.setText("Prescription "+ ++position);
viewHolder.prescNo.setText("Prescription: "+model.getPrescriptionID());
viewHolder.doctorType.setText("Type: "+model.getDoctorType());
viewHolder.doctorName.setText("Doctor: "+model.getDoctorName());
viewHolder.patientName.setText("Patient: "+model.getPatientName());
adapter = new MedicinesInPrescAdapter(model.getLstproduct());
viewHolder.lstMedicines.setAdapter(adapter);
}
@Override
public int getItemCount() {
return prescriptionList.size();
}
public final static class ListItemViewHolder
extends RecyclerView.ViewHolder {
TextView prescnum;
TextView prescNo;
TextView doctorType;
TextView patientName;
TextView doctorName;
CheckBox selectAll;
RecyclerView lstMedicines;
public ListItemViewHolder(View itemView) {
super(itemView);
prescnum = (TextView) itemView.findViewById(R.id.prescnum);
prescNo = (TextView) itemView.findViewById(R.id.prescNo);
doctorType = (TextView) itemView.findViewById(R.id.doctorType);
patientName = (TextView) itemView.findViewById(R.id.patientName);
doctorName = (TextView) itemView.findViewById(R.id.doctorName);
selectAll = (CheckBox) itemView.findViewById(R.id.selectAll);
lstMedicines = (RecyclerView) itemView.findViewById(R.id.lstAllMedicines);
MyLinearLayoutManager layoutManager = new MyLinearLayoutManager(itemView.getContext(),LinearLayoutManager.VERTICAL,false);
lstMedicines.setHasFixedSize(false);
lstMedicines.setLayoutManager(layoutManager);
}
}
}
//My Child Adapter Class
public class MedicinesInPrescAdapter extends RecyclerView.Adapter<MedicinesInPrescAdapter.MedicineListItemViewHolder>{
List<Modal_Product_List> prescriptionProducts;
public MedicinesInPrescAdapter(List<Modal_Product_List> prescriptionListProd) {
if (prescriptionListProd == null) {
throw new IllegalArgumentException(
"PrescriptionProductList must not be null");
}
this.prescriptionProducts = prescriptionListProd;
}
@Override
public MedicineListItemViewHolder onCreateViewHolder(
ViewGroup viewGroup, int viewType) {
View itemView = LayoutInflater.
from(viewGroup.getContext()).
inflate(R.layout.item_row_medicine_productlist,
viewGroup,
false);
return new MedicineListItemViewHolder(itemView);
}
@Override
public void onBindViewHolder(
MedicineListItemViewHolder viewHolder, int position) {
Modal_Product_List modelMedicine = prescriptionProducts.get(position);
viewHolder.medicineName.setText(modelMedicine.getMedicinename());
viewHolder.medQty.setText(modelMedicine.getQuantity());
viewHolder.days.setText("30");
viewHolder.Amount.setText(modelMedicine.getQuantitybasedprice());
}
@Override
public int getItemCount() {
return prescriptionProducts.size();
}
public final static class MedicineListItemViewHolder
extends RecyclerView.ViewHolder {
TextView medicineName;
EditText medQty;
TextView days;
TextView Amount;
CheckBox selectMe;
public MedicineListItemViewHolder(View itemView) {
super(itemView);
medicineName = (TextView) itemView.findViewById(R.id.medicineName);
medQty = (EditText) itemView.findViewById(R.id.medQty);
days = (TextView) itemView.findViewById(R.id.days);
Amount = (TextView) itemView.findViewById(R.id.amount);
selectMe = (CheckBox) itemView.findViewById(R.id.selectMe);
}
}
}
解决方案
I got this issue few days ago and finally solved it. All you have to do is @override the layout manager onMeasure function as below:
CustomLinearLayoutManager
public class CustomLinearLayoutManager extends LinearLayoutManager {
private static final String TAG = CustomLinearLayoutManager.class.getSimpleName();
public CustomLinearLayoutManager(Context context) {
super(context);
}
public CustomLinearLayoutManager(Context context, int orientation, boolean reverseLayout) {
super(context, orientation, reverseLayout);
}
private int[] mMeasuredDimension = new int[2];
@Override
public void onMeasure(RecyclerView.Recycler recycler, RecyclerView.State state, int widthSpec, int heightSpec) {
final int widthMode = View.MeasureSpec.getMode(widthSpec);
final int heightMode = View.MeasureSpec.getMode(heightSpec);
final int widthSize = View.MeasureSpec.getSize(widthSpec);
final int heightSize = View.MeasureSpec.getSize(heightSpec);
int width = 0;
int height = 0;
for (int i = 0; i < getItemCount(); i++) {
measureScrapChild(recycler, i, View.MeasureSpec.makeMeasureSpec(i, View.MeasureSpec.UNSPECIFIED),
View.MeasureSpec.makeMeasureSpec(i, View.MeasureSpec.UNSPECIFIED),
mMeasuredDimension);
if (getOrientation() == HORIZONTAL) {
width = width + mMeasuredDimension[0];
if (i == 0) {
height = mMeasuredDimension[1];
}
} else {
height = height + mMeasuredDimension[1];
if (i == 0) {
width = mMeasuredDimension[0];
}
}
}
switch (widthMode) {
case View.MeasureSpec.EXACTLY:
width = widthSize;
case View.MeasureSpec.AT_MOST:
case View.MeasureSpec.UNSPECIFIED:
}
switch (heightMode) {
case View.MeasureSpec.EXACTLY:
height = heightSize;
case View.MeasureSpec.AT_MOST:
case View.MeasureSpec.UNSPECIFIED:
}
setMeasuredDimension(width, height);
}
private void measureScrapChild(RecyclerView.Recycler recycler, int position, int widthSpec,
int heightSpec, int[] measuredDimension) {
try {
View view = recycler.getViewForPosition(0);//fix 动态添加时报IndexOutOfBoundsException
if (view != null) {
RecyclerView.LayoutParams p = (RecyclerView.LayoutParams) view.getLayoutParams();
int childWidthSpec = ViewGroup.getChildMeasureSpec(widthSpec,
getPaddingLeft() + getPaddingRight(), p.width);
int childHeightSpec = ViewGroup.getChildMeasureSpec(heightSpec,
getPaddingTop() + getPaddingBottom(), p.height);
view.measure(childWidthSpec, childHeightSpec);
measuredDimension[0] = view.getMeasuredWidth() + p.leftMargin + p.rightMargin;
measuredDimension[1] = view.getMeasuredHeight() + p.bottomMargin + p.topMargin;
recycler.recycleView(view);
}
} catch (Exception e) {
e.printStackTrace();
}
}
}
You can just copy and past the custom layout manager as above and in set up your recyclerview in the parent adapter like this:
RecyclerView.LayoutManager layoutManager = new CustomLinearLayoutManager(mContext);
holder.childRecyclerView.setLayoutManager(layoutManager);
Remember : Don't use same layoutManager as parent adapter, or error will occur.
这篇关于如何拥有一个ListView / RecyclerView父RecyclerView里面？我有一个父列表，其中包含一些孩子名单在每一个位置的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！
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