different color for certain item in my list

I have a list with items, some items can be in 'viewed' status. i want those items to have different background color then the rest.

list view basically has a single selector for the whole list, setting a background color on one of the items prevent wo开发者_运维百科nt do the trick since the selector is drawn below my item's layout as background and counts on them being transparent.

is there a way to define more then one selector for a list ? if not is it possible to create a selector that has an extra state ? basically all i want is the regular list selector plus an extra state that it's ColorDrawable is defined in my colors.xml.(since i can't inherit from a drawable and the list_selector drawables of android are not visible in the SDK for me to use i wanted just to add a state, but then how do i enforce using the extra state ?)

Found the answer. My problem is not the state of the selector, i want the selector in the same state for ALL items! the problem is that i want the item to be regular if certain boolean in items in the adapter is false and color X if the boolean is true, but even if the color is X i still want it to be transparent once it's selected or pressed.

So the solution is the following 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="@android:color/transparent" /> <!-- pressed -->
    <item android:state_selected="true" 
          android:drawable="@android:color/transparent" /> <!-- focused -->
    <item android:drawable="@color/viewed_hotels_color" /> <!-- default -->
</selector>

i found out the even though the list itself is the one that gets the state , it DOES pass the state on to it's children (I.E the list items) which i thought it didn't do. Only android:focused wont be effective here, android list items are not focused but selected... so as you can see in any state that is not pressed or selected i give my default color, otherwise it's transparent and the selector is visible to all.

in my adapter i need the following code(in getView() method):

View itemView = convertedView; <- i'll spare you the layout details...
Item item = getItem(position);
if( item.isViewed() ){
    itemView.setBackgroundResource(R.drawable.viewed_item_background);
}else{
    itemView.setBackgroundDrawable(null);
}

this makes sure every item will get the right background. of course if an item state is changed to viewed and i want it to show i need to call notifyDatasetCahnged() on the adapter.

You can implement a custom subclass of your Adapter and override the method getView(). As this method is called by the list to get the View for a single item you can define how the a single list item looks like by overriding getView(). So changing the background color of an already viewed item shouldn't be a problem.

UPDATE

The AbsListView class which the ListView class extends has a method called setDrawSelectorOnTop(). I think you can use it to control the behavior of the selector.