Question

My program has a range of different class activities (basically different screens). In one activity I am creating multiple objects which I would then like to access in other activities.

How do I go about making these objects accessible to other activities within my program, in other words how do I share objects with other activities?

TIA

Mark

Answer 1

The first thing you need to resolve is the operation order. If activity A is the one with the shared objects, what would you do if activity B is run without activity A ever being initialized? Do remember that intents to start activities may come from everywhere, though, to be truthful, exiting with NULL pointer dereference is an acceptable response.

What I did when such a thing was necessary was to not have the shared objects part of the activity, but create a specific object for containing those. You can then store a static reference to that object inside the object, and return it via a static method:

public class GlobalParams {
    private static reference;

    public static GlobalParams getReference()
    {
        if( reference==NULL )
            reference=new GlobalParams();
        return reference;
    }
}

I don’t think parcelable would help you, as that would create distinct copies for the different Activities to use.

Shachar