Arrayadapter with an onclicklistener troubles

Question

Here is my custom arrayadapter class, I want to change the image resource of a button in each row when I click ont it, it works but an other button in an other row also changes. thanks for your help !

public class Coursadapter extends ArrayAdapter<String> {

    Context context;
    int layoutResourceId;
    ArrayList<String> data = null;
    WeatherHolder holder;

    public Coursadapter(Context context, int layoutResourceId,
            ArrayList<String> data) {
        // super(context, layoutResourceId, data, coeff);
        super(context, layoutResourceId, data);
        this.layoutResourceId = layoutResourceId;
        this.context = context;
        this.data = data;

    }

    public View getView(int position, View convertView, ViewGroup parent) {
        View row = convertView;

        if (row == null) {
            LayoutInflater inflater = ((Activity) context).getLayoutInflater();
            row = inflater.inflate(layoutResourceId, null);

            holder = new WeatherHolder();
            holder.name = (TextView) row.findViewById(R.id.item_cours_name);
            holder.b = (ImageButton) row.findViewById(R.id.button);
            holder.b.setOnClickListener(new OnClickListener() {
                @Override
                public void onClick(View v) {
                    // TODO Auto-generated method stub
                    WeatherHolder w = (WeatherHolder) v.getTag();
                    w.b.setImageResource(R.drawable.butgreen);
                }
            });
            row.setTag(holder);

        } else {
            holder = (WeatherHolder) row.getTag();
        }

        holder.b.setTag(holder);
        String name1 = data.get(position);
        holder.name.setText(name1);

        return row;
    }

    static class WeatherHolder {

        TextView name;
        ImageButton b;
    }
}

Answer 1

You can declare variable int that will hold the position of selected item and

public void onItemClick(AdapterView<?> adapter, View arg1, int position, long id) {
            mSelectedItem = position;
            mAdapter.notifyDataSetChanged();
    }

and in your custom adapter getView method check the position and change the image of your button

public View getView(int position, View convertView, ViewGroup parent) {
        if (position == mSelectedItem) {
        // set your image
    }

Look i try this code with me and work , implements OnClickListener in your activity

public class MainActivity extends Activity  implements OnClickListener

and in your getView method

public View getView(int position, View convertView, ViewGroup parent) {
        View row = convertView;

        if (row == null) {
            LayoutInflater inflater = ((Activity) context)
                    .getLayoutInflater();
            row = inflater.inflate(layoutResourceId, null);

            holder = new WeatherHolder();
            holder.name = (TextView) row.findViewById(R.id.item_cours_name);
            holder.b = (ImageButton) row.findViewById(R.id.button);
            holder.b.setOnClickListener(MainActivity.this);

and the implement the Onclick method set the resource

@Override
public void onClick(View v) {
    WeatherHolder w = (WeatherHolder) v.getTag();
    w.b.setImageResource(android.R.drawable.star_big_on);
}