I have this method i create that adds a sprite to my andengine scene every second.
private void createSpriteSpawnTimeHandler(){
TimerHandler spriteT
Looking at the TimerHandler source file here: http://code.google.com/p/andengine/source/browse/src/org/anddev/andengine/entity/handler/timer/TimerHandler.java?r=30ba07312ed7d4636077b835ba15f772e3f30db7
You'll see that there isn't a method to update the interval. And the variable mTimerSeconds is also final.
I would implement my own IUpdateHandler class and add a non-final mTimerSeconds and a method to update it.
You can copy the existing TimerHandler and then make the changes accordingly.