selector is not working

Question

I uses its selection for the list

Answer 1

a selector is a 'state-list-drawable', ie it 'selects' <items> depending upon the state of the view it is applied to.

A StateListDrawable is a drawable object defined in XML that uses a several different images to represent the same graphic, depending on the state of the object. For example, a Button widget can exist in one of several different states (pressed, focused, or niether) and, using a state list drawable, you can provide a different background image for each state.

Here is the syntax, as in the docs :

<selector xmlns:android="http://schemas.android.com/apk/res/android"
    android:constantSize=["true" | "false"]
    android:dither=["true" | "false"]
    android:variablePadding=["true" | "false"] >
    <item
        android:drawable="@[package:]drawable/drawable_resource"
        android:state_pressed=["true" | "false"]
        android:state_focused=["true" | "false"]
        android:state_hovered=["true" | "false"]
        android:state_selected=["true" | "false"]
        android:state_checkable=["true" | "false"]
        android:state_checked=["true" | "false"]
        android:state_enabled=["true" | "false"]
        android:state_activated=["true" | "false"]
        android:state_window_focused=["true" | "false"] />
</selector>

notice the attributes you can set in the the <item>.

here is an example of a typical selector..

<selector xmlns:android="http://schemas.android.com/apk/res/android" 
>
    <item
        android:state_focused="true" 
        android:state_pressed="false" 
android:drawable="@drawable/list_element_focused"   />
    <item
        android:state_focused="true" 
        android:state_pressed="true"
android:drawable="@drawable/list_element_focused_pressed"   />  
    <item
        android:state_focused="false" 
        android:state_pressed="true"
android:drawable="@drawable/list_element_pressed"   />  
    <item
android:drawable="@drawable/list_element_unfocused" />  
</selector>

Answer 2

Please apply your selector in your listview instead of LinearLayout.