customadapter

public class Adapter extends BaseAdapter{

    private static LayoutInflater inflater=null;
    private static String [] placename;

    @SuppressWarnings("static-access")
    public StayAdapter(Activity a, String [] placename)
    {
        this.placename = placename;
        inflater = (LayoutInflater)a.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
    }
    @Override
    public int getCount() {
        // TODO Auto-generated method stub
        return placename.length;
    }

    @Override
    public Object getItem(int position) {
        // TODO Auto-generated method stub
        return position;
    }

    @Override
    public long getItemId(int position) {
        // TODO Auto-generated method stub
        return position;
    }

    @Override
    public View getView(int position, View convertView, ViewGroup parent) {
        // TODO Auto-generated method stub
        View vi=convertView;
        if(convertView==null)
            vi = inflater.inflate(R.layout.staylist, null);

        TextView namee = (TextView)vi.findViewById(R.id.name);
        namee.setText(placename[position]);

        int height = convertView.getHeight();[Null pointer exception here]

        return vi;
    }

}