title: IllegalArgumentException: No view found when returning from other activity
body: <p>This is setContentView()</p>
  
  <pre><code>setContentView(R.layout.game_activity); // "mainactivity" layout
  </code></pre>
  
  <p>This is in game_activity layout:</p>
  
  <pre><code>&lt;FrameLayout
      android:id="@+id/containerFrame"
      android:layout_width="match_parent"
      ...
  </code></pre>
  
  <p>This is in R.java</p>
  
  <pre><code>public static final class id {
  
      public static final int containerFrame=0x7f0a0004;
      public static final int gridFragment=0x7f0a0005;
      ...
  </code></pre>
  
  <p>Still getting:</p>
  
  <pre><code>09-09 14:55:12.721: E/AndroidRuntime(1972): java.lang.IllegalArgumentException: 
  No view found for id 0x7f0a0004 for fragment BlancFragment{41048548 #2 id=0x7f0a0004}
  </code></pre>
  
  <p>What am I missing here?</p>