Question

I’m taking an android class now, so I am somewhat new to android app development.

My first assumption for a Base Activity is that it’s Global Variables and it’s values would be available to all activities. I have found that it is available to my Main Activity, but not any activities after that.

In the Base Activity I am storing an ArrayList of Objects. I also load data from an xml in there that adds objects to the arrayList. Once in the Main Activity I still have access to that arrayList and it’s values. I use it to fill a list. But when I go to the next activity, it knows about the arrayList but thinks it is empty.

Do I need to create methods in the base activity to retrieve the arrayList and to add objects to the array list?

Any help would be appreciated.

Thank you,

Michelle

Answer 1

Global variables need to be declared static. Then they would be accessible from any class. Example:

public class Globals {
    public static String myString;
}

Any class can read/write the myString like this:

Globals.myString = "foo";

or

String bar = Globals.myString;