Change EditText background with button click

I have a EditText box with a custom background color. Below it i have a button that when pressed should change the background color for EditText. I'm not sure how to do that. (so far the button only displays text on EditText when clicked but i need the background to change as well) Any help is appreciated.

<EditText 
android:id="@+id/etRumi" 
android:layout_width="fill_parent" 
android:layout_height="90dp" 
android:layout_alignLeft="@+id/Rumi" 
android:layout_alignParentTop="true" 
android:background="@drawable/orange_01" 
android:ems="10" 
android:gravity="center" /> 


<Button 
android:id="@+id/Rumi" 
android:layout_width="95dp" 
android:layout_height="45dp" 
android:layout_alignBaseline="@+id/Khayyam" 
android:layout_alignBottom="@+id/Khayyam" 
android:layout_alignParentLeft="true" 
android:background="@drawable/custom_button" 
android:onClick="RumiQuote" 
android:text="Rumi" /> 

This is from the java src file to make the change

public void RumiQuote(View v){ 
   EditText editText = (EditText)findViewById(R.id.etRumi); 
   editText.setText(RumiQuotes[rnd.nextInt(4)], TextView.BufferType.EDITABLE);
}