title: TextView with wrap_content height obscured by ListView below it
body: <p>I am not seeing my "Hello World" textview.
  The listview, which I populate with elements, is all that shows.</p>
  
  <pre><code>&lt;RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
      xmlns:tools="http://schemas.android.com/tools"
      android:layout_width="match_parent"
      android:layout_height="match_parent"&gt;
      tools:context="lister.quantumproductions.com.lister.MainActivity"&gt;
  
      &lt;TextView
          android:layout_width="wrap_content"
          android:layout_height="wrap_content"
          android:text="Hello World!"
          android:layout_above="@+id/recipe_list_view"&gt;&lt;/TextView&gt;
  
      &lt;ListView
          android:id="@+id/recipe_list_view"
          android:layout_width="match_parent"
          android:layout_height="match_parent"&gt;&lt;/ListView&gt;
  
  &lt;/RelativeLayout&gt;
  
  
  
  public class MainActivity extends AppCompatActivity {
      private ListView mListView;
  
      @Override
      protected void onCreate(Bundle savedInstanceState) {
          super.onCreate(savedInstanceState);
          setContentView(R.layout.activity_main);
  
          loadListView();
      }
  
      private void loadListView() {
          mListView = findViewById(R.id.recipe_list_view);
          final ArrayList&lt;Recipe&gt; recipes = Recipe.getRecipesFromFile("recipes.json", this);
  
          RecipeAdapter a = new RecipeAdapter(this, recipes);
          mListView.setAdapter(a);
      }
  }
  </code></pre>