How to set a different background for function key in xml on keyboard

[mikej]

I am developing a keyboard application for Android. i tried to set different background for normal key and function key but it didint work:\[code\]<!-- Functional keys. --><item android:state_single="true" android:state_pressed="true" android:drawable="@drawable/btn_keyboard_special" /><item android:state_single="true" android:drawable="@drawable/btn_keyboard_special" /><!-- Toggle keys. Use checkable/checked state. --><item android:state_checkable="true" android:state_checked="true" android:state_pressed="true" android:drawable="@drawable/btn_keyboard_key_dark_pressed_on" /><item android:state_checkable="true" android:state_pressed="true" android:drawable="@drawable/btn_keyboard_key_dark_pressed_off" /><item android:state_checkable="true" android:state_checked="true" android:drawable="@drawable/btn_keyboard_key_dark_normal_on" /><item android:state_checkable="true" android:drawable="@drawable/btn_keyboard_key_dark_normal_off" /> <!-- Normal keys --><item android:state_pressed="true" android:drawable="@drawable/glow" /><item android:drawable="@drawable/btn_keyboard_key_light_normal" />\[/code\]