Android :: Android - Changing Checked Status On Click

I have a listview that needs to be multiple choice (i.e each list item has a checkbox which can be checked / unchecked). The list view is in a tabhost and is the content for teh first tab. My set up is like so: My tab is set up with:

TabSpec tab = tabHost.newTabSpec("Services");
tabHost.addTab(tabHost.newTabSpec("tab_test1").setIndicator("Services").setContent(new Intent(this, ServiceList.class)));

When the tab is clicked new activity ServiceList is started. ServiceList is defined as such:
public class ServiceList extends ListActivity{ private EscarApplication application;
ListView listView; @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState);
setContentView(R.layout.service_list);
ServiceList.this.application = (EscarApplication) this.getApplication();
final ListView listView = getListView();
} protected void onListItemClick(ListView l, View v, int position, long id) { String.valueOf(id); Long.toString(id); ( (CheckedTextView) v).setChecked(true);
super.onListItemClick(l, v, position, id);
} @Override public void onStart() { super.onStart();
//Generate and display the List of visits for this day by calling the AsyncTask
GenerateServiceList services = new GenerateServiceList();
int id = ServiceList.this.application.getVisitId();
services.execute(id); listView = getListView(); listView.setChoiceMode(ListView.CHOICE_MODE_MULTIPLE);
} //The AsyncTask to generate a list private class GenerateServiceList extends AsyncTask<Integer, String, Cursor> { // can use UI thread here protected void onPreExecute() {
} // automatically done on worker thread (separate from UI thread) protected Cursor doInBackground(Integer...params) { int client_id = params[0];
ServiceList.this.application.getServicesHelper().open();
Cursor cur = ServiceList.this.application.getServicesHelper().getPotentialVisitServices(client_id);
return cur;
} // can use UI thread here protected void onPostExecute(Cursor cur){ startManagingCursor(cur);
// the desired columns to be bound String[] columns = new String[] {ServicesAdapter.KEY_SERVICE};
// the XML defined views which the data will be bound to int[] to = new int[] {R.id.display_service};
SimpleCursorAdapter mAdapter = new SimpleCursorAdapter(ServiceList.this, R.layout.service_list_element, cur, columns, to);
// set this adapter as your ListActivity's adapter ServiceList.this.setListAdapter(mAdapter);
ServiceList.this.application.getServicesHelper().close();
} } }
So, everything works ok until I click on my list item to change the checkbox state. The part of teh code set to handle click events is causing me problems:
protected void onListItemClick(ListView l, View v, int position, long id) { String.valueOf(id);
Long.toString(id); ((CheckedTextView) v).setChecked(true); super.onListItemClick(l, v, position, id);
}
My understanding is that the View v passed to the onListItemClick method reperesents my list element, so I am trying to cast v as a CheckedTextView and set teh checked value to true, however this just causes my app to crash.