如何保存CheckBox Checked Item如果我滚动

Question

I have created a RecycleView contains check boxes when I check Item and scrolls the check item gonna be unchecked it does not save the action I gonna explain in the pic this is before scrolling when checked the first item enter image description here after scrolling it changed to default as unChecked enter image description here

and here's My adapter Class

package abtech.waiteriano.com.waitrer.adapters;

import android.content.Context;
import android.support.v7.widget.RecyclerView;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.CheckBox;
import android.widget.CompoundButton;
import android.widget.TextView;

import java.util.ArrayList;

import abtech.waiteriano.com.waitrer.R;
import abtech.waiteriano.com.waitrer.getters_and_setters.ItemsListsModel;

/**
 * Created by yassin on 5/17/17.
 */

public class RecycleAdapterDialogModifier extends RecyclerView.Adapter<RecycleAdapterDialogModifier.MyViewHolder> {
    private Context context;
    ArrayList<ItemsListsModel> modifierArrayList;
    ArrayList<Boolean> positionArray;


    public RecycleAdapterDialogModifier(Context context, ArrayList<ItemsListsModel> modifierArrayList) {
        this.context = context;
        this.modifierArrayList = modifierArrayList;
        positionArray = new ArrayList<Boolean>(modifierArrayList.size());
        for(int i =0;i<modifierArrayList.size();i++){
            positionArray.add(false);
        }
    }

    @Override
    public MyViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
        View itemView = LayoutInflater.from(parent.getContext())
                .inflate(R.layout.modifierlistitem, parent, false);


        return new MyViewHolder(itemView);
    }

    @Override
    public void onBindViewHolder(MyViewHolder holder, final int position) {
        ItemsListsModel itemsListsModel = modifierArrayList.get(position);
        holder.modifierCB.setText(itemsListsModel.getName());

        holder.modifierCB.setFocusable(false);
        holder.modifierCB.setChecked(positionArray.get(position));
        holder.modifierCB.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() {

            @Override
            public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
                if(isChecked ){
                    System.out.println(position+"--- :)");
                    positionArray.set(position, true);

                }else
                    positionArray.set(position, false);
            }
        });
    }

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

    public class MyViewHolder extends RecyclerView.ViewHolder {
        CheckBox modifierCB;
        TextView usernameContItem;


        public MyViewHolder(View itemView) {
            super(itemView);
            modifierCB = (CheckBox) itemView.findViewById(R.id.itemCb);

        }
    }
}

sorry for my bad english and If there's any thing is not clear

this is the part in Class Calls Adapter

private static void setPiking(String modeCode) {
    RecyclerView modifierItemList;
    Button OkBtn, CancelBtn;
    LayoutInflater inflater2 = (LayoutInflater)  context.getSystemService(context.LAYOUT_INFLATER_SERVICE);
    View view2 = inflater2.inflate(R.layout.modifier_list, null);
    modifierItemList = (RecyclerView) view2.findViewById(R.id.modifierList);
    OkBtn = (Button) view2.findViewById(R.id.okBtn90);
    CancelBtn = (Button) view2.findViewById(R.id.cancelBtn90);
    final AlertDialog.Builder builder1 = new AlertDialog.Builder(new ContextThemeWrapper(context, R.style.myDialog));

    ModGroubeCode = Integer.parseInt(modeCode);
    String Sql = "SELECT  dbo.Items.Code, dbo.Items.Name FROM dbo.Items";
    ResultSet RS = ConnectionClass.Ret_RS(Sql);
    try {

            ArrayList<ItemsListsModel> modifierArrayList = new ArrayList<ItemsListsModel>();
            while (RS.next()) {

                builder1.setMessage("Modifier Group :- " + RS.getString("ModifierGroup_Name"));
                String name = RS.getString("Name");
                String id = RS.getString("Code");
                TreeMap<String, Object> arr = new TreeMap<String, Object>();



                ItemsListsModel itemsListsModel = new ItemsListsModel(id, name, arr);
                modifierArrayList.add(itemsListsModel);
            }
            adapter = new RecycleAdapterDialogModifier(context, modifierArrayList);
            modifierItemList.setAdapter(adapter);

        builder1.setView(view2);
        builder1.setCancelable(true);

        final AlertDialog alert11 = builder1.create();

        OkBtn.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {

            }
        });

        CancelBtn.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                alert11.dismiss();
            }
        });


        alert11.show();


        if (Mo_multiPick) {
            //show Ok
            OkBtn.setVisibility(View.VISIBLE);

        } else {
            OkBtn.setVisibility(View.INVISIBLE);
        }
        if (Mo_allawNoPick) {
            //show Cancel
            CancelBtn.setVisibility(View.VISIBLE);
        } else {
            CancelBtn.setVisibility(View.INVISIBLE);
        }
    } catch (Exception ex) {

    }
}

Answer 1

Try writing itemHolder.checkBox.setOnCheckedChangeListener(null); just before holder.modifierCB.setChecked(positionArray.get(position)); to ensure that OnCheckedChangeListener() is not triggered.