title: Error with R.id.display
body: <p>In this line of code:</p>
  
  <pre><code>disp = (TextView) findViewById(R.id.display);
  </code></pre>
  
  <p>I get the error "display cannot be resolved or is not a field". Eclipse suggests the following:</p>
  
  <ul>
  <li>Create field 'display' in type 'id'</li>
  <li>Create constant 'display' in type 'id'</li>
  <li>Change to 'action settings'</li>
  <li>Change to 'hybrid'</li>
  <li>Change to 'none'</li>
  <li>Change to 'normal'</li>
  <li>Change to 'satellite'</li>
  <li>Change to 'terrain'</li>
  </ul>