I have posted the same problem a couple of times but it hasn't yet been resolved. I have a ListFragment
and I want to highlight the selected item in the list. I have been given suggestions to use a "selector". I don't understand how to use this selector. My ListFragment
class is:
// Create an adapter with list of stores and populate the list with
// values
ArrayAdapter<String> adapter = new ArrayAdapter<String>(getActivity(),
android.R.layout.simple_list_item_1, StoreList);
setListAdapter(adapter);
mDbHelper.close();
}
/*
* (non-Javadoc)
*
* Handles the event when an item is clicked on left pane, performs action
* based on the selection in left pane
*
* @see android.app.ListFragment#onListItemClick(android.widget.ListView,
* android.view.View, int, long)
*/
@Override
public void onListItemClick(ListView l, View v, int position, long id) {
String selectedStore = (String) getListAdapter().getItem(position);
DetailFragment fragment = (DetailFragment) getFragmentManager()
.findFragmentById(R.id.detailFragment);
if (fragment != null && fragment.isInLayout()) {
v.setBackgroundColor(getResources().getColor(R.color.BLUE));
// passes selectedStore to detail fragment
fragment.setText(selectedStore);
// getItemList(selectedStore);
}
Using setBackground sets the color permanently, but I want it to go away when another item is selected.
I understand how to use a selector in a ListView
but in my case if I haven't defined any xml for the Listview
, then how would I use a "selector"? I am using android.R.layout.simple_list_item_1
which is predefined.
The following worked for me for:
res/color/menu_highlight.xml
<?xml version="1.0" encoding="utf-8"?>
<selector xmlns:android="http://schemas.android.com/apk/res/android">
<item
android:state_pressed="true"
android:drawable="@color/red" />
<item
android:state_selected="true"
android:drawable="@color/red" />
<item
android:drawable="@color/white" />
</selector>
res/values/colors.xml:
<?xml version="1.0" encoding="utf-8"?>
<resources>
<color name="white">#FFFFFF</color>
<color name="red">#FF0000</color>
</resources>
res/layout/menuitem.xml:: (XML for every item in the list)
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_height="wrap_content"
android:layout_width="fill_parent">
<TextView
android:id="@+id/textmenu"
android:layout_height="wrap_content"
android:text="text"
android:textColor="#FFFFFF"
android:background="@color/menu_highlight"
android:visibility="visible"
android:layout_width="fill_parent" />
</LinearLayout>
Finally, in the ListFragment class, add View previous and add the following code to the onlistitemclick function.. (mentioned in ListFragment: highlight selected row)
public class MenuListFragment extends ListFragment{
View previous;
@Override
public void onListItemClick(ListView l, View v, int position, long id) {
super.onListItemClick(l, v, position, id);
//Logic to highlight selected item
previous.setSelected(false);
v.setSelected(true);
previous=v;
}
}