title: What is "android.R.layout.simple_list_item_1"?
body: <p>I've started learning Android development and am following a todolist example from a book:</p>
  
  <pre><code>// Create the array list of to do items
  final ArrayList&lt;String&gt; todoItems = new ArrayList&lt;String&gt;();
  
  // Create the array adapter to bind the array to the listView
  final ArrayAdapter&lt;String&gt; aa;
  aa = new ArrayAdapter&lt;String&gt;(  this, 
                                  android.R.layout.simple_list_item_1,
                                  todoItems
                              );
  myListView.setAdapter(aa);
  </code></pre>
  
  <p>I can't understand exactly this code especially this line:</p>
  
  <pre><code>android.R.layout.simple_list_item_1
  </code></pre>