if (background.equals("timeOfDay")) {
mBackgroundPainter = new TimeOfDayBackPainter();
} else if (background.equals("singleColor")) {
mBackgroundPainter = new SingleColorBackPainter();
} else if (background.equals("oneImage")) {
mBackgroundPainter = new OneImageBackPainter();
} else { // timeBlock
mBackgroundPainter = new TimeBlockBackPainter();
}
mBackgroundPainter.layoutChanged(mLayout, mModel);