Android change background of key dynamically

[Lumo]

I'm building a custom keyboard in android.My input.xml:\[code\]<com.mykeyboard.MyKeyboardView xmlns:android="http://schemas.android.com/apk/res/android" android:id="@+id/keyboard" android:layout_width="match_parent" android:layout_height="wrap_content" android:layout_alignParentBottom="true" android:keyBackground="@drawable/keybg" />\[/code\]All the keys do have the same background.Now I'm trying to dynamically change the background of one single key. Is this possible?The code for my custom MyKeyboardView can be found here:http://pastebin.com/ZpLzZZUjThe code for my MyKeyboardService can be found here:http://pastebin.com/HYPGFTfg