android - Generate button states dynamically. -

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i have buttons simple png-files. have default normal state. want create pressed state every button dynamically. main aim avoid working png , designer. how can create pressed state using xml or java?

if however, looking xml code triggering different imagery based on states, selector placed in res->drawable folder trick.

<?xml version="1.0" encoding="utf-8"?> <selector xmlns:android="http://schemas.android.com/apk/res/android" >     <item         android:state_enabled="false"         android:drawable="@drawable/gallerydisabled" />     <item         android:state_pressed="true"         android:state_enabled="true"         android:drawable="@drawable/gallerypressed" />     <item         android:state_enabled="true"         android:drawable="@drawable/gallerynormal" /> </selector>

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