XML : Adding a header/TextView above 2 list views

I have a java class and two xml files which is basically just a side by side listView which takes in some values. I want to put a header or a text view above each list view ( i want them to stay side by side ) however every time I try to add a textView the whole project messes up and following online instructions isn't working to implement a header. I was wondering if anyone would be able to lend a hand

   public class Leaderboard extends AppCompatActivity {          private ListView UsernameList;          private ListView ScoreList;        LocalDatabase localDatabase;        /** Called when the activity is first created */      @Override      protected void onCreate(Bundle savedInstanceState) {          super.onCreate(savedInstanceState);          setContentView(R.layout.activity_leaderboard);            ArrayAdapter<String> listAdapter;          ArrayAdapter<Integer> list2Adapter;            //Find the ListView resources          UsernameList = (ListView) findViewById(R.id.UsernameList);          ScoreList = (ListView) findViewById(R.id.ScoreList);            //Create and populate the list of usernames.          //This is where the information from the Database would need to be entered. and the String[] removed          String[] usernames = new String[]{"Andy", "Marie", "George"};          ArrayList<String> usernameList = new ArrayList<String>();          usernameList.addAll(Arrays.asList(usernames));            //Create and populate the list of scores          //This is where the information from the Database would need to be entered. and the Integer[] removed          Integer[] scores = new Integer[]{7, 4, 1};          ArrayList<Integer> scoreList = new ArrayList<Integer>();          scoreList.addAll(Arrays.asList(scores));            //adds the users details to the leaderboard          localDatabase = new LocalDatabase(this);          Contact contact = localDatabase.getLoggedInUser();          //Set a string to have the value of the users name.          String s = contact.name;          //Create Array Adapter using the username list          listAdapter = new ArrayAdapter<String>(this, R.layout.activity_row, usernameList);          //Add more users          listAdapter.add(s);          //Set the Array Adapter as the ListView's adapter          UsernameList.setAdapter(listAdapter);            //Create Array Adapter using the username list          list2Adapter = new ArrayAdapter<Integer>(this, R.layout.activity_row, scoreList);          //Add more users          list2Adapter.add(0);          //Set the Array Adapter as the ListView's adapter          ScoreList.setAdapter(list2Adapter);      }  }    

Then the two xml files

  <?xml version="1.0" encoding="utf-8"?>  <TextView xmlns:android="http://schemas.android.com/apk/res/android"      android:background="@color/colorPrimaryDark"      android:id="@+id/rowTextView"      android:layout_width="fill_parent"      android:layout_height="wrap_content"      android:textColor="@color/white"      android:textStyle="bold"      android:padding="10dp"      android:textSize="16sp">  </TextView>        <?xml version="1.0" encoding="utf-8"?>  <LinearLayout      xmlns:android="http://schemas.android.com/apk/res/android"      xmlns:tools="http://schemas.android.com/tools"      android:layout_width="fill_parent"      android:background="@color/colorPrimaryDark"      android:layout_height="fill_parent"      android:padding="20dp"      android:orientation="horizontal"      tools:context=".Leaderboard">        <ListView          android:id="@+id/UsernameList"          android:layout_width="0dp"          android:layout_height="match_parent"          android:layout_margin="2dp"          android:layout_weight=".60"          android:drawSelectorOnTop="false"          android:headerDividersEnabled="false">      </ListView>        <ListView          android:id="@+id/ScoreList"          android:layout_width="0dp"          android:layout_height="match_parent"          android:layout_margin="2dp"          android:layout_weight=".40">      </ListView>  </LinearLayout>