How to use two arraylist in adapter recyclerview

I want to use two arraylist in same adapter but I'm getting error. It is not setting the value and I'm getting INDEX OUT BOUND EXPECTION

This is my adapter code:

public class packagingProductAdapter extends RecyclerView.Adapter<packagingProductAdapter.ViewHolder> {
private List<packingProductPOJO> list_data;
// private List<packingProductPOJO> testPOJO;
private List<testPOJO> test_POJO;
//  private packingProduct context;
private testClass context;
String product_id, category_id, quantity = "0", sizeValue = "0";
private static int _value = 0;
PrefManager prefManager;
ProgressLoader progressLoader;
/*
public packagingProductAdapter(List<packingProductPOJO> list_data, List<testPOJO> testPOJO, packingProduct context) {
this.list_data = list_data;
this.test_POJO = testPOJO;
this.context = context;
prefManager = new PrefManager(context);
progressLoader = new ProgressLoader(context);
} */
public packagingProductAdapter(List<packingProductPOJO> list_data, List<testPOJO> test_POJO, testClass context) {
this.list_data = list_data;
this.test_POJO = test_POJO;
this.context = context;
prefManager = new PrefManager(context);
progressLoader = new ProgressLoader(context);
}
@Override
public packagingProductAdapter.ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
View view= LayoutInflater.from(parent.getContext()).inflate(R.layout.packing_product_cart_view_row,parent,false);
return new packagingProductAdapter.ViewHolder(view);
}
@Override
public void onBindViewHolder(final packagingProductAdapter.ViewHolder holder, final int position){
final packingProductPOJO listData = list_data.get(position);
final testPOJO test_POJO1 = test_POJO.get(position);
holder.setIsRecyclable(false);
if (test_POJO.equals("null")){
holder.linearLayout.setVisibility(View.GONE);
}else
{
holder.linearLayout.setVisibility(View.VISIBLE);
holder.heading.setText(test_POJO1.getContact_name());
//   holder.linearLayout.setBackgroundResource((R.drawable.rectangleborder));
}
holder.produt_quantity.setText("=  " +listData.getQuantity() );
if (listData.getProductPdf().equals("null")) {
holder.product_name.setText(listData.getCat_name());
}else {
holder.product_name.setText("DOWNLOAD PDF");
}
// holder.heading.setText(listData.getImage());
product_id = listData.getProductid();
category_id = listData.getImage();
holder.purchaseQty.setText(listData.getUser_quantity());
holder.pro_price.setText("Rs. " +listData.getPrice());
final String finalPro_qty = "0";
final String finalProduct_ID = product_id;
holder.count_up.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
String removeProductId = listData.getId();
String removeQuantity = listData.getUser_quantity();
int quantity = 0;
try{
quantity  = Integer.parseInt(removeQuantity) + 1;
} catch(NumberFormatException ex){ // handle your exception
ex.printStackTrace();
}
if (quantity > Integer.parseInt(listData.getQuantity())){
Toast.makeText(context, "Insufficent Stock ", Toast.LENGTH_LONG).show();
}else {
//     context.add("pk@gmail.com", String.valueOf(quantity), finalProduct_ID, "manual", category_id, holder.purchaseQty, position, "0");
}
}
});
holder.count_down.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
String removeProductId = listData.getId();
String removeQuantity = listData.getUser_quantity();
final int quantity = Integer.valueOf(removeQuantity) - 1;
//   context.add("pk@gmail.com", String.valueOf(quantity), finalProduct_ID, "manual", category_id, holder.purchaseQty, position, "0");
}
});
holder.purchaseQty.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
// get alert_dialog.xml view
LayoutInflater li = LayoutInflater.from(context);
View promptsView = li.inflate(R.layout.alert_dialog, null);
AlertDialog.Builder alertDialogBuilder = new AlertDialog.Builder(
context);
// set alert_dialog.xml to alertdialog builder
alertDialogBuilder.setView(promptsView);
final EditText userSize = (EditText) promptsView.findViewById(R.id.etUserInput);
final TextView enterQuantity = promptsView.findViewById(R.id.enterQuantity);
// set dialog message
alertDialogBuilder
.setCancelable(false)
.setPositiveButton("OK", new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int id) {
//  Toast.makeText(context, "Entered: "+userInput.getText().toString(), Toast.LENGTH_LONG).show();
final String quantityValue = (userSize.getText().toString());
if (TextUtils.isEmpty(quantityValue)) {
userSize.setError("Quantity cannot be Empty");
Toast.makeText(context, "Quantity cannot be Empty", Toast.LENGTH_LONG).show();
userSize.requestFocus();
return;
}
final int quantity = Integer.valueOf(quantityValue);
if (quantity > Integer.parseInt(listData.getQuantity())){
Toast.makeText(context, "Insufficent Stock ", Toast.LENGTH_LONG).show();
}else {
//    context.add("pk@gmail.com", String.valueOf(quantity), finalProduct_ID, "manual", category_id, holder.purchaseQty, position, sizeValue);
}
}
})
.setNegativeButton("Cancel",
new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int id) {
dialog.cancel();
}
});
// create alert dialog
AlertDialog alertDialog = alertDialogBuilder.create();
// show it
alertDialog.show();
}
});
}
@Override
public int getItemCount() {
return  list_data.size()  + test_POJO.size();
}
public class ViewHolder extends RecyclerView.ViewHolder{
private CardView cardView;
private TextView purchaseQty, product_name, produt_quantity, heading, pro_price;
private ImageView     count_up, count_down;
private LinearLayout  topview, userQuantityLayout;
private LinearLayout linearLayout;
public ViewHolder(View itemView) {
super(itemView);
heading = itemView.findViewById(R.id.heading);
purchaseQty= itemView.findViewById(R.id.txtItemQty);
produt_quantity= itemView.findViewById(R.id.total_qty);
product_name=itemView.findViewById(R.id.pro_name);
purchaseQty.setText("0");
count_up =  itemView.findViewById(R.id.count_up);
count_down =  itemView.findViewById(R.id.count_down);
pro_price = itemView.findViewById(R.id.pro_price);
cardView = itemView.findViewById(R.id.packing_card_view);
cardView.setVisibility(View.VISIBLE);
//            purchaseQty.setBackground(context.getResources().getDrawable(R.drawable.rectangleborder));
topview = itemView.findViewById(R.id.topview);
topview.setVisibility(View.GONE);
linearLayout = itemView.findViewById(R.id.linearheading);
}
}
}

And this is Log error

E/AndroidRuntime: FATAL EXCEPTION: main
Process: com.cls.kraftpaper, PID: 24722
java.lang.IndexOutOfBoundsException: Index: 3, Size: 3
at java.util.ArrayList.get(ArrayList.java:437)
at com.kraftpaper.handler.activity.packaging.adapter.packagingProductAdapter.onBindViewHolder(packagingProductAdapter.java:71)
at com.kraftpaper.handler.activity.packaging.adapter.packagingProductAdapter.onBindViewHolder(packagingProductAdapter.java:27)
at androidx.recyclerview.widget.RecyclerView$Adapter.onBindViewHolder(RecyclerView.java:7065)
at androidx.recyclerview.widget.RecyclerView$Adapter.bindViewHolder(RecyclerView.java:7107)
at androidx.recyclerview.widget.RecyclerView$Recycler.tryBindViewHolderByDeadline(RecyclerView.java:6012)
at androidx.recyclerview.widget.RecyclerView$Recycler.tryGetViewHolderForPositionByDeadline(RecyclerView.java:6279)
at androidx.recyclerview.widget.RecyclerView$Recycler.getViewForPosition(RecyclerView.java:6118)
at androidx.recyclerview.widget.RecyclerView$Recycler.getViewForPosition(RecyclerView.java:6114)
at androidx.recyclerview.widget.LinearLayoutManager$LayoutState.next(LinearLayoutManager.java:2303)
at androidx.recyclerview.widget.LinearLayoutManager.layoutChunk(LinearLayoutManager.java:1627)
at androidx.recyclerview.widget.LinearLayoutManager.fill(LinearLayoutManager.java:1587)
at androidx.recyclerview.widget.LinearLayoutManager.onLayoutChildren(LinearLayoutManager.java:665)
at androidx.recyclerview.widget.RecyclerView.dispatchLayoutStep2(RecyclerView.java:4134)
at androidx.recyclerview.widget.RecyclerView.onMeasure(RecyclerView.java:3540)
at android.view.View.measure(View.java:24845)
at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:6908)
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:24845)
at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:6908)
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:24845)
at android.widget.ScrollView.measureChildWithMargins(ScrollView.java:1472)
at android.widget.FrameLayout.onMeasure(FrameLayout.java:221)
at android.widget.ScrollView.onMeasure(ScrollView.java:498)
at android.view.View.measure(View.java:24845)
at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:6908)
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:24845)
at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:6908)
at android.widget.FrameLayout.onMeasure(FrameLayout.java:221)
at androidx.appcompat.widget.ContentFrameLayout.onMeasure(ContentFrameLayout.java:143)
at android.view.View.measure(View.java:24845)
at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:6908)
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:24845)
at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:6908)
at android.widget.FrameLayout.onMeasure(FrameLayout.java:221)
at android.view.View.measure(View.java:24845)
at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:6908)
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:24845)
at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:6908)
at com.android.internal.policy.DecorView.measureChildWithMargins(DecorView.java:3029)
at android.widget.FrameLayout.onMeasure(FrameLayout.java:221)
at com.android.internal.policy.DecorView.onMeasure(DecorView.java:863)
at android.view.View.measure(View.java:24845)
at android.view.ViewRootImpl.performMeasure(ViewRootImpl.java:3218)
at android.view.ViewRootImpl.measureHierarchy(ViewRootImpl.java:2004)
at android.view.ViewRootImpl.performTraversals(ViewRootImpl.java:2296)
at android.view.ViewRootImpl.doTraversal(ViewRootImpl.java:1888)
at android.view.ViewRootImpl$TraversalRunnable.run(ViewRootImpl.java:7908)
at android.view.Choreographer$CallbackRecord.run(Choreographer.java:1101)
at android.view.Choreographer.doCallbacks(Choreographer.java:917)
at android.view.Choreographer.doFrame(Choreographer.java:847)
at android.view.Choreographer$FrameDisplayEventReceiver.run(Choreographer.java:1086)
at android.os.Handler.handleCallback(Handler.java:883)
at android.os.Handler.dispatchMessage(Handler.java:100)
at android.os.Looper.loop(Looper.java:230)
at android.app.ActivityThread.main(ActivityThread.java:7778)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:526)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1034)

Here I have added the logcat. I'm getting the result is there.

That is because of this code:

@Override
public int getItemCount() {
return  list_data.size()  + test_POJO.size();
}

You are returning the sum of both lists:
For Eg let say you are returning: return 3 + 3 // total = 6

But also you are trying to access individual list in :

@Override
public void onBindViewHolder(final packagingProductAdapter.ViewHolder holder, final int position){
final packingProductPOJO listData = list_data.get(position); 
final testPOJO test_POJO1 = test_POJO.get(position); 

The position will increment as you scroll at list 6 times which is the total sum of the two lists getItemCount(), which will trow java.lang.IndexOutOfBoundsException: Index: 3, Size: 3

Try to return the size of only one of the lists:

@Override
public int getItemCount() {
return  list_data.size();
}

Your code inside the getItemCount() method is

@Override
public int getItemCount() {
return  list_data.size()  + test_POJO.size();
}

You returning 2 different array's size. onBindViewHolder() method has position variable. This variable gives item position and this position's range is 0..getItemCount().

In onBindViewHolder() method you have this code

    final packingProductPOJO listData = list_data.get(position);
final testPOJO test_POJO1 = test_POJO.get(position);

Your getItemCount() method returning two different array's size but you trying access same position. This is Exception's cause. If the arrays size's are the same you can use this

@Override
public int getItemCount() {
return  list_data.size();
}

But if not you can do this:

@Override
public int getItemCount() {
return  Math.max(list_data.size(), test_POJO.size());
}

in onBindViewHolderMethod()

    if (list_data.size() >= position) list_data.get(0);
else list_data.get(position);
if (test_POJO.size() >= position) list_data.get(0);
else test_POJO.get(possition);

But this is not the good way

Try this.

@Override
public int getItemCount() {
return  min(list_data.size(), test_POJO.size());
}

It will resolve current issue. But you'll find some data missing from RecyclerView.

If the lists, contain similar elements, you could combine them and then use them as one list in the adapter, you will avoid all sorts of hassles if you do that.

List<PojoClass> combined = new ArrayList<>();
combined.addAll(firstList);
combined.addAll(secondList);