java - custom checkbox difficulty in android

Question

how to modify this imageCheckBoxAdapter code in order to maintain status of checkBox when scrolled(that is all the checkboxes which are checked should remain checked even after scrolling. Also the checked variables need to be stored in an array)?

class imageCheckBoxAdapter extends ArrayAdapter<String>
{
private final Context context;
private final ArrayList<String> values;
private final Map< String, SmbFile> obj;
static ArrayList<Boolean> checks=new ArrayList<Boolean>();
public imageCheckBoxAdapter(Context context,ArrayList<String> values,Map< String, SmbFile>obj) 
{
    super(context, R.layout.row_checkbox, values);
    this.context = context;
    this.values = values;
    this.obj=obj;
}
@Override
public View getView(int position, View convertView, ViewGroup parent) {
    LayoutInflater inflater = (LayoutInflater) context
        .getSystemService(Context.LAYOUT_INFLATER_SERVICE);
    View rowView = inflater.inflate(R.layout.row_checkbox, parent, false);
    TextView textView = (TextView) rowView.findViewById(R.id.text1_check);
    textView.setText(values.get(position));
    ImageView imageView = (ImageView) rowView.findViewById(R.id.icon_image_check);
    try
    {
        if((obj.get(values.get(position)).isFile()))
        {
            imageView.setImageResource(R.drawable.view_file_icon);
        }
        else
        {
            imageView.setImageResource(R.drawable.view_folder_icon);
        }
    }
    catch (SmbException e) 
    {
        Toast.makeText(context,"Network error",Toast.LENGTH_SHORT).show();
        Log.d("id1", "error1");
        e.printStackTrace();
    }
    return rowView;
}
}

row_checkbox.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="fill_parent"
    android:layout_height="wrap_content"
    android:padding="5dp" >
    <CheckBox
    android:id="@+id/checkBox1"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:checked="false" />
 <ImageView
    android:id="@+id/icon_image_check"
    android:layout_width="50px"
    android:layout_height="50px"
    android:layout_marginLeft="5px"
    android:layout_marginRight="20px"
    android:layout_marginTop="5px"
    android:src="@drawable/view_file_icon" >
    </ImageView>
 <TextView
    android:id="@+id/text1_check"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:text="@+id/label"
    android:textSize="30px" 
    android:typeface="sans">
    </TextView> 
</LinearLayout>

Answer 1

class imageCheckBoxAdapter extends ArrayAdapter<String> implements View.onClickListener
{
    private final Context context;
    private final ArrayList<String> values;
    private final Map< String, SmbFile> obj;
    private ArrayList<Boolean> checks=new ArrayList<Boolean>();

    public imageCheckBoxAdapter(Context context,ArrayList<String> values,Map< String, SmbFile>obj) 
    {
        super(context, R.layout.row_checkbox, values);
        this.context = context;
        this.values = values;
        this.obj=obj;

        for (int i = 0; i < values.size(); i++) {
            checks.add(i, false);
        }
    }

    @Override
    public View getView(int position, View convertView, ViewGroup parent) {
        LayoutInflater inflater = (LayoutInflater) context
            .getSystemService(Context.LAYOUT_INFLATER_SERVICE);
        View rowView = inflater.inflate(R.layout.row_checkbox, parent, false);
        TextView textView = (TextView) rowView.findViewById(R.id.text1_check);
        CheckBox chk = (CheckBox) rowView.findViewById(R.id.checkBox1);
        textView.setText(values.get(position));
        ImageView imageView = (ImageView) rowView.findViewById(R.id.icon_image_check);
        try
        {
            if((obj.get(values.get(position)).isFile()))
            {
                imageView.setImageResource(R.drawable.view_file_icon);
            }
            else
            {
                imageView.setImageResource(R.drawable.view_folder_icon);
            }
        }
        catch (SmbException e) 
        {
            Toast.makeText(context,"Network error",Toast.LENGTH_SHORT).show();
            Log.d("id1", "error1");
            e.printStackTrace();
        }

        chk.setTag(Integer.valueOf(position));

        // Set a listener for the checkbox
        chk.setOnClickListener(this);

        //Sets the state of CB, since we have the list of checked CB
        chk.setChecked(checks.get(position));

        return rowView;
    }

    @Override
    public void onClick(View view) {
        Integer index = (Integer)view.getTag();
        boolean state = checks.get(index.intValue());

        checks.set(index.intValue(), !state);
    }
}