How to change android keyboard key font?

Question

How can I change the default font for keys of keyboard I am writing in android (Eclipse)?
Thank you

Answer 1

I found an answer : Implemented onDraw...

@Override
public void onDraw(Canvas canvas) {
    super.onDraw(canvas);
    try{
    onBufferDraw();
    }catch(Exception ex){

    }
    if (mBuffer!=null)
        canvas.drawBitmap(mBuffer, 0, 0, null);
}