title: java.lang.ClassCastException: android.widget.TextView
body: <p>I've this layout xml, named pagina.xml:</p>
  
  <pre><code>&lt;?xml version="1.0" encoding="utf-8"?&gt;
  &lt;RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
      android:layout_width="match_parent"
      android:layout_height="match_parent"
      android:gravity="center_vertical" &gt;
  
      &lt;TextView
          android:id="@+id/descrizione"
          android:layout_width="wrap_content"
          android:layout_height="wrap_content"
          android:layout_alignParentLeft="true"
          android:layout_alignParentRight="true"
          android:layout_alignParentTop="true"
          android:text="Large Text"
          android:textAppearance="?android:attr/textAppearanceLarge" /&gt;
  
      &lt;Button
          android:id="@+id/scelta1"
          android:layout_width="wrap_content"
          android:layout_height="wrap_content"
          android:layout_alignParentBottom="true"
          android:layout_centerHorizontal="true"
          android:text="Button" /&gt;
  
      &lt;Button
          android:id="@+id/scelta3"
          android:layout_width="wrap_content"
          android:layout_height="wrap_content"
          android:layout_above="@+id/scelta1"
          android:layout_alignLeft="@+id/scelta1"
          android:layout_marginBottom="16dp"
          android:text="Button" /&gt;
  
      &lt;Button
          android:id="@+id/scelta2"
          android:layout_width="wrap_content"
          android:layout_height="wrap_content"
          android:layout_above="@+id/scelta3"
          android:layout_alignLeft="@+id/scelta3"
          android:layout_marginBottom="18dp"
          android:text="Button" /&gt;
  
  &lt;/RelativeLayout&gt;
  </code></pre>
  
  <p>I want to write the description of the element, but when I assign to a variable the textview element, the emulator crashes. This is the code:</p>
  
  <pre><code>public int posizione;
      public String stanza;
      public string[] azioni;
      public int[] vai;
      public XmlPullParser xpp;
      public EditText descr;
      public Button scelta_1, scelta_2, scelta_3;
  
      public void onCreate(Bundle savedInstanceState) {
          super.onCreate(savedInstanceState);
          setContentView(R.layout.pagina);
  
          try {
              carica_stanza(posizione);
          } catch (FileNotFoundException e) {
              // TODO Auto-generated catch block
              e.printStackTrace();
          } catch (XmlPullParserException e) {
              // TODO Auto-generated catch block
              e.printStackTrace();
          } catch (IOException e) {
              // TODO Auto-generated catch block
              e.printStackTrace();
          }
  
          descr = (EditText) this.findViewById(R.id.descrizione);
          scelta_1= (Button) this.findViewById(R.id.scelta1);
          scelta_2= (Button) this.findViewById(R.id.scelta2);
          scelta_3= (Button) this.findViewById(R.id.scelta3);
  
      }
  </code></pre>
  
  <p>Help me to understand!</p>