title: Can't set text to the TextView
body: <p>I am learning to develop apps for android from a book and after following the instructions I end up with the following. When I run the app the text from the <code>setStartUpScreenText()</code> object is not displayed. </p>
  
  <p>MainActivity.java:</p>
  
  <pre><code>protected void setStartupScreenText(){
          TextView planetNameValue = (TextView)findViewById(R.id.DataView1);
          planetNameValue.setText(earth.planetName);
  }
  </code></pre>
  
  <p>MainActivity.xml</p>
  
  <pre><code>&lt;TextView
          android:id="@+id/DataView1"
          android:layout_toRightOf="@+id/TextView1"
          android:layout_marginLeft="36dip"
          android:layout_width="wrap_content"
          android:layout_height="wrap_content" /&gt; 
  </code></pre>