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POjava.lang.ClassCastException: android.widget.TextView
 

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  1. POjava.lang.ClassCastException: android.widget.TextView
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    <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>
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    1. PO
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    1. PTQuestion
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    1. USAxiomatic.it
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      1. POjava.lang.ClassCastException: android.widget.TextView
      1. USsurhidamatya
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    1. COusing the `this` keyboard isn't incredibly great style, in my opinion... just get rid of it. it's obvious that you are invoking the `Activity`s `findViewById` method.
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      1. POjava.lang.ClassCastException: android.widget.TextView
      1. USAlex Lockwood
 

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Detail views are divided into sections. All the information in the data section comes from columns in the selected row. The other sections display data from other, related rows.

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