android - Highlight selected item in "ListFragment"?

Question

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.

Answer 1

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;
    }

}