Android, setSelected() and state_selected

I'm having trouble with View.setSelected(). Views are flagged as selected -- TextViews, for example, change their font color -- but my background selectors don't seem to register the change.

Example selec开发者_StackOverflowtor:

<selector xmlns:android="http://schemas.android.com/apk/res/android">
    <item android:drawable="@android:color/transparent" />

    <item android:state_selected="true">
        <shape android:shape="rectangle">
            <solid android:color="#ff8600" />
        </shape>
    </item>
</selector>

I'm not even sure which kind of context information would be useful. The views are children of a LinearLayout, and I'm programatically setting the selected state inside a touch event. As I said, it does seem to work, since the font color goes from white to gray, but the background stays the same.

Edit: I checked for silly mistakes before posting :P. The answer is not "add the android:background attribute".

The order of items matters in selector xmls, the default item should always be at the bottom in the items list.

not only the selected state order is important, even the order of all states is important. In my case, I added state_pressed as first and my state_selected doesn´t work. So I changed the order like this, and then it worked:

<selector xmlns:android="http://schemas.android.com/apk/res/android" >
  <item 
    android:state_selected="false"
    android:drawable="@drawable/chooser_normal"></item>
<item 
    android:state_selected="true"
    android:drawable="@drawable/chooser_pressed"></item>
<item 
    android:state_pressed="true"
    android:drawable="@drawable/chooser_pressed"></item>
<item 
    android:state_pressed="false"
    android:drawable="@drawable/chooser_normal"></item>
 </selector>

EDIT

I faced now also the problem, if I press the button, it will be in the selected-state but not in pressed-state. So, the solution must be, to order the states like this and additional, it´s a good practise to add a default button look:

First, set the selected state and after this, set the same as pressed state alternately. (For now, stackoverflow isn´t showing my edit completely, don´t know why, just be patient please).

It's not obvious why, but I think this might work (notice the addition of state_selected="false"):

<item android:state_selected="false" android:drawable="@android:color/transparent" />

<item android:state_selected="true">
    <shape android:shape="rectangle">
        <solid android:color="#ff8600" />
    </shape>
</item>

I hope that's helpful.