My class derived from SQLiteOpenHelper is getting huge

My class derived from SQLiteOpenHelper is getting bigger and bigger over a time. At the speaking time it is more than 1500 lines of code which is not considered to be cool. There might be some elegant solution to prevent it from growing, i.e. separating by peaces. Not sure what those peaces to be though. Some people say it is a bad practice to inherit from the mentioned class because it leads misbehavior to database creation/upgrade procedures. Any hint? Thanks a lot!