ListView - Get data from xml - Android

Main.xml

<ListView
        android:id="@+id/listView1"
        android:layout_width="match_parent"
        android:layout_height="wrap_content" >
    </ListView>

Main.java

ListView listView = (ListView) findViewById(R.id.listView1);
listView.setAdapter(new ArrayAdapter<>(this, android.R.layout.simple_list_item_1, getResources().getStringArray(R.array.countries)));