<?xml version="1.0" encoding="UTF-8"?>
<selector xmlns:android="http://schemas.android.com/apk/res/android">

    <item android:drawable="@drawable/chat_send_p" android:state_enabled="false" android:state_pressed="false"/>
    <item android:drawable="@drawable/chat_send_n" android:state_enabled="true" android:state_pressed="true"/>

</selector>