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POAndroid CheckedTextView - Changing checked status on click
 

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  1. POAndroid CheckedTextView - Changing checked status on click
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    <p>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.</p> <p>My set up is like so:</p> <p>My tab is set up with:</p> <pre><code>TabSpec tab = tabHost.newTabSpec("Services"); tabHost.addTab(tabHost.newTabSpec("tab_test1").setIndicator("Services").setContent(new Intent(this, ServiceList.class))); </code></pre> <p>When the tab is clicked new activity ServiceList is started</p> <p>ServiceList is defined as such:</p> <pre><code> 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&lt;Integer, String, Cursor&gt; { // 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(); } } } </code></pre> <p>So, everything works ok until I click on my list item to change the checkbox state.</p> <p>The part of teh code set to handle click events is causing me problems:</p> <pre><code> 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); } </code></pre> <p>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. Am I missing something simple here, or is there an easier way to do this?</p> <p>Thanks</p> <p>Kevin</p>
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    1. USKevin Bradshaw
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    1. COCan you show the exact stacktrace or logcat output from the crash?
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      1. POAndroid CheckedTextView - Changing checked status on click
      1. USCheryl Simon
 

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