Android : How can i add my Custom Button to my layout

I am trying unsuccessfully to add a custom button to my layout. The custom button is defined in a layout xml called tile_quarter.xml. It has a imageview and 6 testviews. How can i add this to the gridview?

My efforts to date plus code. I have a gridview and a layoutadapter which is meant to add a custom button to my gridview dynamically. I cant get it to work, no errors showing just a blank screen. The button is there as when i tap it the toast appears as coded but none of its controls visible.

Layout adapter

public class LayoutAdapter extends BaseAdapter {
    private Context mContext;

    public LayoutAdapter(Context c) {
        mContext = c;
    }

    public int getCount() {
        return tileIds.length;
    }

    public Object getItem(int position) {
        return null;
    }

    public long getItemId(int position) {
        return 0;
    }

    // create a new ImageView for each item referenced by the Adapter
    public RelativeLayout getView(int position, View convertView, ViewGroup parent) {
        RelativeLayout layoutView;
        if (convertView == null) {  // if it's not recycled, initialize some attributes
            layoutView = new RelativeLayout(mContext);
            layoutView.setLayoutParams(new GridView.LayoutParams(500, 500));
            layoutView.setPadding(8, 8, 8, 8);
        } else {
            layoutView = (RelativeLayout) convertView;
        }

        layoutView.findViewById(tileIds[position]);
        //.setImageResource(mThumbIds[position]);
        return layoutView;
    }

    // references to our images
    private Integer[] tileIds = {
            R.layout.tile_quarter
            };
}

Main Class

public class MainActivity extends Activity {

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        GridView gridview = (GridView) findViewById(R.id.gridview);
        gridview.setAdapter(new LayoutAdapter(this));

        gridview.setOnItemClickListener(new OnItemClickListener() {
            public void onItemClick(AdapterView<?> parent, View v, int position, long id) {
                Toast.makeText(MainActivity.this, "" + position, Toast.LENGTH_SHORT).show();
            }
        });
    }