How To Create A Box To Hold Text Below Google Maps Within Android

At this point I know how to utilize Google Maps within Android but it always seems to take up the full window, there is an image below which shows what I'm attempting to accomplish (having a box below the Google maps where I can store text i.e. "Hello World"

How do I add box below Google Maps, so to store text i.e. "Hello World"

Code so far:

ActivityMain:

Java Code:

public class MainActivity extends Activity {
private GoogleMap googleMap;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);

[Code] .....

Image: