Tuesday, April 3, 2012

ArrayIndexOutOfBoundsException with custom Android Adapter for multiple views in ListView


I am attempting to create a custom Adapter for my ListView since each item in the list can have a different view (a link, toggle, or radio group), but when I try to run the Activity that uses the ListView I receive an error and the app stops. The application is targeted for the Android 1.6 platform.



The code:




public class MenuListAdapter extends BaseAdapter {
private static final String LOG_KEY = MenuListAdapter.class.getSimpleName();

protected List<MenuItem> list;
protected Context ctx;
protected LayoutInflater inflater;

public MenuListAdapter(Context context, List<MenuItem> objects) {
this.list = objects;
this.ctx = context;
this.inflater = (LayoutInflater)this.ctx.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
}

@Override
public View getView(int position, View convertView, ViewGroup parent) {
Log.i(LOG_KEY, "Position: " + position + "; convertView = " + convertView + "; parent=" + parent);
MenuItem item = list.get(position);
Log.i(LOG_KEY, "Item=" + item );

if (convertView == null) {
convertView = this.inflater.inflate(item.getLayout(), null);
}

return convertView;
}

@Override
public boolean areAllItemsEnabled() {
return false;
}

@Override
public boolean isEnabled(int position) {
return true;
}

@Override
public int getCount() {
return this.list.size();
}

@Override
public MenuItem getItem(int position) {
return this.list.get(position);
}

@Override
public long getItemId(int position) {
return position;
}

@Override
public int getItemViewType(int position) {
Log.i(LOG_KEY, "getItemViewType: " + this.list.get(position).getLayout());
return this.list.get(position).getLayout();
}

@Override
public int getViewTypeCount() {
Log.i(LOG_KEY, "getViewTypeCount: " + this.list.size());
return this.list.size();
}

}



The error I receive:




java.lang.ArrayIndexOutOfBoundsException
at android.widget.AbsListView$RecycleBin.addScrapView(AbsListView.java:3523)
at android.widget.ListView.measureHeightOfChildren(ListView.java:1158)
at android.widget.ListView.onMeasure(ListView.java:1060)
at android.view.View.measure(View.java:7703)



I do know that the application is returning from getView and everything seems in order.



Any ideas on what could be causing this would be appreciated.



Thanks,



-Dan

1 comment:

  1. The item view type you are returning from getItemViewType() is >= getViewTypeCount().

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