Android: ListView Multiple Selection

Question

Problem:

When i click on the 2nd checkbox item in the listview then automatically 10th item is checked. I can not understand what's happen?

import java.util.ArrayList;
import java.util.List;

import android.app.Activity;
import android.content.Context;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.View;
import android.view.View.OnClickListener;
import android.view.ViewGroup;
import android.widget.ArrayAdapter;
import android.widget.CheckBox;
import android.widget.CompoundButton;
import android.widget.ImageButton;
import android.widget.TextView;

public class ItemAdapter extends ArrayAdapter<MyItem> {
private int resId;
Context context;
private ArrayList<MyItem> itemList;

public ItemAdapter(Context context, int textViewResourceId,
        List<MyItem> objects) {
    super(context, textViewResourceId, objects);
    this.context = context;
    this.resId = textViewResourceId;
    this.itemList = new ArrayList<MyItem>();
    this.itemList.addAll(objects);
}

private class ViewHolder {
    public boolean needInflate;
    public TextView txtItemName;
    public CheckBox chkItem;
}

@Override
public View getView(int position, View convertView, ViewGroup parent) {
    ViewHolder holder = null;
    MyItem cell = (MyItem) getItem(position);
    LayoutInflater mInflater = (LayoutInflater) context
            .getSystemService(Activity.LAYOUT_INFLATER_SERVICE);
    if (convertView == null) {
        convertView = mInflater.inflate(R.layout.listitem, null);
        holder = new ViewHolder();
        holder.txtItemName = (TextView) convertView
                .findViewById(R.id.tvItemName);
        holder.chkItem = (CheckBox) convertView.findViewById(R.id.chkItem);
        holder.chkItem
                .setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() {

                    @Override
                    public void onCheckedChanged(CompoundButton buttonView,
                            boolean isChecked) {
                        //Log.i("Pos", "" + position);
                        //cell.setSelected(buttonView.isChecked());
                    }
                });
        convertView.setTag(holder);

    } else {
        holder = (ViewHolder) convertView.getTag();
    }

    holder.txtItemName.setText(cell.getName());
    return convertView;
  }
}

"MyItem" is my pojo Class.

OnCreate Code:

 lvItemName = (ListView) findViewById(R.id.lvItemName);
    List<MyItem> myItemsList = new ArrayList<MyItem>();

    for (int i = 0; i < items.length; i++) {
        MyItem item = new MyItem(items[i], false);
        myItemsList.add(item);
    }

    ItemAdapter adapter = new ItemAdapter(this, R.layout.listitem,
            myItemsList);
    lvItemName.setAdapter(adapter);
    lvItemName.setOnItemClickListener(this);

"items" is my String Array.

Thanks in Advance.

Answer 1

I hope you can avoid this problem by

adding a boolean array like

boolean[] checkboxState=new boolean['your array size here']; //global decleration
holder.checkBox.setOnClickListener(new OnClickListener() {

            public void onClick(View v) {
                // TODO Auto-generated method stub

                if (((CheckBox) v).isChecked()) {
                    checkboxState[position] = true;


                } else
                    checkboxState[position] = false;

This works for me and i hope this will help you..