title: ListView in Android does not populate
body: <p>ALL,
  I have a little problem.
  I am trying to create a following layout for my application:</p>
  
  <pre><code>&lt;?xml version="1.0" encoding="utf-8"?&gt;
  &lt;RelativeLayout
      xmlns:android="http://schemas.android.com/apk/res/android"
      android:orientation="vertical"
      android:layout_width="fill_parent"
      android:layout_height="fill_parent"
      &gt;
      &lt;TextView 
      android:id="@+id/output" 
      android:layout_width="fill_parent" 
      android:layout_height="fill_parent"
      android:layout_marginRight="40dp"
      android:layout_marginLeft="40dp"
      android:layout_marginBottom="12dp"
      android:layout_marginTop="50dp"
      android:scaleType="center"
      android:gravity="center_horizontal"
      layout_margin="1dp" 
      android:textSize="18sp" 
      android:text=" " 
       &gt;
      &lt;/TextView&gt;
      &lt;ImageView
        android:id="@+id/next"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentRight="true"
        android:layout_marginRight="50dp"
        android:layout_marginTop="340dp"
        android:src="@drawable/next"
      /&gt;
      &lt;ImageView
          android:id="@+id/save"
          android:layout_width="wrap_content"
          android:layout_height="wrap_content"
          android:layout_toLeftOf="@id/next"
          android:layout_marginRight="20dp"
          android:layout_marginTop="340dp"
          android:src="@drawable/save"
      /&gt;
      &lt;ListView
          android:id="@+id/filenames"
          android:layout_width="fill_parent"
          android:layout_height="wrap_content"
          android:layout_marginLeft="40dp"
          android:layout_marginRight="40dp"
          android:drawSelectorOnTop="false"
          android:layout_below="@id/output"
          android:layout_above="@+id/save"
      /&gt;
  &lt;/RelativeLayout&gt;
  </code></pre>
  
  <p>Then in my source I use following:</p>
  
  <pre><code>    test = new ArrayList&lt;String&gt;();
      test.add( "a" );
      test.add( "b" );
      test.add( "c" );
      lv = (ListView) findViewById( R.id.filenames );
      adapter = new ArrayAdapter&lt;String&gt;( this, android.R.layout.simple_list_item_1, test );
      lv.setAdapter( adapter );
      lv.setTextFilterEnabled( true );
      lv.setOnItemClickListener( new OnItemClickListener()
      {
          public void onItemClick(AdapterView&lt;?&gt; parent, View view, int position, long id)
          {
              m_fileclicked = (String) lv.getItemAtPosition( position );
          }
      });
  </code></pre>
  
  <p>The problem is that I can see the buttons and the text, but the list view is black (i.e. empty).</p>
  
  <p>The code is using the Acivity, not ListActivity.</p>
  
  <p>I looked around - there are at least 3 examples here on how to populate the list view when using the activity, but they all use some "crazy" layouts.</p>
  
  <p>I just need to display a simple strings.</p>
  
  <p>Can someone please help?</p>
  
  <p>Thank you.</p>