ListAdapter k=new SimpleAdapter(this,val1,R.layout.mytask,new String[]{"TaskId","heading","status"},new int[]{R.id.View1,R.id.View2,R.id.ViewStatus});

public class Adapter extends SimpleAdapter{
        HashMap<String, String> map = new HashMap<String, String>();
        public Adapter(Context context, List<? extends Map<String, String>> data,
                int resource, String[] from, int[] to) {
            super(context, data, resource, from, to);
        }
    @Override
        public View getView(int position, View convertView, ViewGroup parent){


          // You can customize here.

        }

    }

Adapter mAdapter = new Adapter(params);

ListAdapter k = new SimpleAdapter(...) {
    @Override
    public View getView (int position, View convertView, ViewGroup parent) {
        View view = super.getView(position, convertView, parent);
        ...
        return view;
    }
}