Combining Java layout and xml

I created a custom RelativeLayout and I want to populate it with a design from an xml file, is it possible?

My code: This is the onCreate from my main activity

protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(new CustomRelativeLayout(this));
    getLayoutInflater().inflate(R.layout.three_items_list_row, null, false);
}