问题描述
我想添加一些子视图(列表项),这些视图来自JSON格式的数据.每个子列表都位于父列表项行的下方.如何在RecyclerView
中为每个行项目(父项和子项列表项)填充它?
I want to add some child Views (List Items), which come to me from 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)?
我尝试在RecyclerView
父行(用于填充子列表)中使用RecyclerView
,但是在这里看不到子视图.
I have tried using RecyclerView
within RecyclerView
parent row (for populating child lists), but here child views are not visible.
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);
}
}
}
子适配器类
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);
}
}
}
推荐答案
几天前我遇到了这个问题,并最终解决了它.您要做的只是 @覆盖布局管理器onMeasure 功能,如下所示:
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
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 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();
}
}
}
您可以像上面那样复制并粘贴自定义布局管理器,并在父适配器中设置recyclerview,如下所示:
You can just copy and paste 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);
记住:不要使用与父适配器相同的layoutManager,否则会发生错误.
Remember : Don't use same layoutManager as parent adapter, or error will occur.
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