Saving state of ArrayList of custom objects

Question

I have a member variable in my Activity which is an ArrayList. The objects populating this ArrayList are objects I have defined called RatingItem. RatingItem has several m

Answer 1

One option is to iterate over your ArrayList in onSaveInstanceState and do something like

RatingItem ri = list.get(i);
ri.saveState(bundle);

The custom saveState call can then go about saving its individual state to the bundle, like so:

static final String RATING_KEY = "RATING_KEY";
int myId;
int myRating;

void saveState(bundle)
{
    bundle.putInt(RATING_KEY + "_" + myId, myRating);
}

The myId member field should be set in RatingItem's constructor, and is used to ensure that all the member fields in an item can be linked back to a particular item at restore time (by reversing the above and using bundle.getInt() with appropriate key+id).