xml - Android: java.lang.ClassCastException: android.widget.imageView cannot be cast to android.widget.textView

Question

I can't fix this problem on my listview template: i have the error as in the title of my post, but i won't cast imageview to textview. Here's my code:

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="200dip"
android:layout_weight="1"
android:paddingBottom="10dip" >

<TextView
    android:id="@+id/mq"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_alignParentBottom="true"
    android:layout_alignParentRight="true"
    android:text="Metri quadri"
    android:textColor="#33b5e5"
    android:textSize="14sp"
    android:textStyle="bold" />

<TextView
    android:id="@+id/citta"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_alignBaseline="@+id/mq"
    android:layout_alignBottom="@+id/mq"
    android:layout_centerHorizontal="true"
    android:text="Citta"
    android:textColor="#33b5e5"
    android:textSize="14sp"
    android:textStyle="bold" />

<TextView
    android:id="@+id/prezzo"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_alignParentBottom="true"
    android:layout_alignParentLeft="true"
    android:text="Prezzo"
    android:textColor="#e1e1e1"
    android:textSize="14sp"
    android:textStyle="bold" />

<TextView
    android:id="@+id/nome"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_alignParentLeft="true"
    android:layout_alignParentTop="true"
    android:padding="5dip"
    android:scrollHorizontally="true"
    android:singleLine="true"
    android:text="@string/testolungo"
    android:textColor="#e1e1e1"
    android:textSize="20sp"
    android:textStyle="bold" />

<ImageView
    android:id="@+id/foto"
    android:layout_width="80dip"
    android:layout_height="60dip"
    android:layout_alignParentLeft="true"
    android:layout_centerVertical="true"
    android:contentDescription="Release"
    android:padding="5dip"
    android:scaleType="centerCrop"
    android:src="@drawable/stub" />

<TextView
    android:id="@+id/descsplash"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_centerHorizontal="true"
    android:layout_centerVertical="true"
    android:text="Small Text"
    android:textSize="16sp"
    android:textStyle="italic" />

</RelativeLayout>

The error for the java code is on line 58 of my file, where i assign the TextView id to TextView mq:

    View vi=convertView;
    if(convertView==null)
    vi = inflater.inflate(R.layout.listlay, null);
    TextView nome=(TextView)vi.findViewById(R.id.nome);
    TextView mq=(TextView)vi.findViewById(R.id.mq); // here's the error (???)
    TextView citta=(TextView)vi.findViewById(R.id.citta);
    TextView prezzo=(TextView)vi.findViewById(R.id.prezzo);
    ImageView image=(ImageView)vi.findViewById(R.id.foto);
    TextView descrizione = (TextView)vi.findViewById(R.id.descsplash);
    nome.setText(data.get(position).getNome());
    mq.setText(data.get(position).getMetriQuadri());
    citta.setText(data.get(position).getCitta());
    prezzo.setText(data.get(position).getPrezzo());
    descrizione.setText(data.get(position).getDescrizione());
    imageLoader.DisplayImage(data.get(position).getForoUrl(), image);

And here is the logcat:

06-25 16:08:32.497: D/Debug(14642): Prendo Textview MQ
06-25 16:08:32.497: D/AndroidRuntime(14642): Shutting down VM
06-25 16:08:32.497: W/dalvikvm(14642): threadid=1: thread exiting with uncaught exception (group=0x40a561f8)
06-25 16:08:32.497: E/AndroidRuntime(14642): FATAL EXCEPTION: main
06-25 16:08:32.497: E/AndroidRuntime(14642): java.lang.ClassCastException: android.widget.ImageView cannot be cast to android.widget.TextView
06-25 16:08:32.497: E/AndroidRuntime(14642): at com.prova.listview.LazyAdapter.getView(LazyAdapter.java:58)

Does anyone know how i can fix this problem?

Answer 1

Eclipse tends to mess up your resources every now and then. This leads to some odd behavior such as strings and images being swapped all over your app, and more commonly classCastException(s), which happen when Eclipse switches your Views' ids around.

A few solutions to that problem:

Clean your project.

Modify an xml layout file and save.

Delete your R file. (Don't worry it will be automatically generated again).

Basically anything that makes your project rebuild and re-generate the R file.