Question

I’m trying to write a custom adapter to adapt a simple class into a ListView. The class is for SMS messages and it contains simple fields like body, sender address, etc. Below, see my adapter layout:

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent" >

    <ImageView
    android:id="@+id/imgContactPhoto"
    android:contentDescription="Contact photo"
    android:layout_width="90sp"
    android:layout_height="90sp" />

    <TextView
    android:id="@+id/lblMsg"
    android:layout_width="fill_parent"
    android:layout_height="wrap_content"
    android:layout_toRightOf="@id/imgContactPhoto" 
    android:paddingLeft="10sp" />

</RelativeLayout>

And my custom adapter class:

public class SmsListAdapter extends ArrayAdapter{

  private int resource;
  private LayoutInflater inflater;
  private Context context;

  @SuppressWarnings("unchecked")
  public SmsListAdapter(Context ctx, int resourceId, List objects) {
      super(ctx, resourceId, objects);
      resource = resourceId;
      inflater = LayoutInflater.from( ctx );
      context=ctx;
  }

  @Override
  public View getView (int position, View convertView, ViewGroup parent) {
        //create a new view of the layout and inflate it in the row
        convertView = ( RelativeLayout ) inflater.inflate( resource, null );

        // Extract the object to show 
        Sms msg = (Sms) getItem(position);

        // Take the TextView from layout and set the message
        TextView lblMsg = (TextView) convertView.findViewById(R.id.lblMsg);
        lblMsg.setText(msg.getBody());

        //Take the ImageView from layout and set the contact image
        long contactId = fetchContactId(msg.getSenderNum());
        String uriContactImg = getPhotoUri(contactId).toString();
        ImageView imgContactPhoto = (ImageView) convertView.findViewById(R.id.imgContactPhoto);
        int imageResource = context.getResources().getIdentifier(uriContactImg, null, context.getPackageName());
        Drawable image = context.getResources().getDrawable(imageResource);
        imgContactPhoto.setImageDrawable(image);
        return convertView;
  }
}

When I attempt to activate the adapter, I get an error on the first line of getView() saying that a TextView cannot be cast to a RelativeLayout.

What I’m not clear on is why that is a TextView in the first place. My list item layout is set as a RelativeLayout and that’s what should be being inflated, unless I’m mistaken. Can anyone help me debug this?

Answer 1

Removing the explicit cast of convertView to RelativeLayout should help.