Question

i have a listivew with custom arrayadapter and custom layout, it have a Checkbox.
I want to make this listview only one checkbox enabled but i dont know how can i do it.

This is my adapter, but the check and uncheck dont works fine. Any exmple please.

public class gremioAdapter extends ArrayAdapter<Gremio> {

Context context;
int layoutResourceId;
ArrayList<Gremio> data = null;
protected String comentarioAlEdiText;

public gremioAdapter(Context context, int layoutResourceId, ArrayList<Gremio> data)
{
    super(context, layoutResourceId, data);
    this.layoutResourceId = layoutResourceId;
    this.context = context;
    this.data = data;
}

public void updateDataSet(Gremio objetoGremioAnadir) {
    this.data.add(objetoGremioAnadir);
    notifyDataSetChanged();

}

public void updateDataSet(Gremio objetoGremioAnadir, int posicion) {
    this.data.add(posicion, objetoGremioAnadir);
    notifyDataSetChanged();

}

public void updateDataSet(String comentario, int posicion) {
    this.data.get(posicion).comentario = comentario;
    notifyDataSetChanged();

}
public void updateDataSet() {

    notifyDataSetChanged();

}

@Override
public View getView(final int position, View convertView, ViewGroup parent) {
    View row = convertView;
    GremioHolder holder = null;
    final GremioHolder h2 = holder;


    if (row == null) {
        LayoutInflater inflater = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
        row = inflater.inflate(layoutResourceId, parent, false);

        holder = new GremioHolder();
        holder.tvGremio = (TextView) row.findViewById(R.id.tvGremio);
        holder.cbActivo = (CheckBox) row.findViewById(R.id.cbGremioActivo);
        holder.tvComentario = (TextView) row.findViewById(R.id.tvComentario);

        row.setTag(holder);
    }
    else {
        holder = (GremioHolder) row.getTag();
    }

    Gremio gremioFinal = data.get(position);

    holder.tvGremio.setText(gremioFinal.literal);
    holder.tvComentario.setText(gremioFinal.comentario);

    if (data.get(position).getActivo().equals("1")) {
        holder.cbActivo.setChecked(true);
    }
    else {
        holder.cbActivo.setChecked(false);
    }

    holder.cbActivo.setOnClickListener(new OnClickListener()
    {


        @Override
        public void onClick(View v) {
            if (data.get(position).activo.equals("0"))
                h2.cbActivo.setChecked(true);
            if (data.get(position).activo.equals("1"))
                h2.cbActivo.setChecked(false);

        }
    });
    holder.cbActivo.setOnCheckedChangeListener(new OnCheckedChangeListener()
    {
            @Override
            public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {

                if (!isChecked) {
                    for (int i = 0; i < data.size(); i++) {
                        data.get(i).activo = "0";
                    }
                    data.get(position).activo = "1";
                }
                if (isChecked) {
                    for (int i = 0; i < data.size(); i++) {
                        data.get(i).activo = "0";
                    }
                }

                notifyDataSetChanged();

            }
        });

        return row;
    }

    public class GremioHolder {
        TextView tvGremio;
        CheckBox cbActivo;
        TextView tvComentario;
    }
}

}

Answer 1

This should take care of your requirement. A very good tutorial on how you can achieve this.

http://tokudu.com/2010/android-checkable-linear-layout/

So the basic funda is that,

1. Extend a Layout (Linear/Relative) and implement the checkable interface.
2. After inflating the layout, find out which child was selected and check the corresponding checkbox. Uncheck any other previously checked item.
3. Make sure that your ListView’s XML has the following marked [android:choiceMode=”singleChoice”]