CODEWITHSUNDEEP
android
Panos
Panos

Reputation: 7417

Android application(application class extention) - null object after some time

In my Android application I extend the "Application" class and use it as a singleton. I set in there my "User" object so I can access it from everywhere. For some reason, that object gets null. I have put logs and see that nothing "sets" the object to null.

What I have noticed is that in the logs I print the "Application" object's Id (memory #) and when the user object gets null, the "Application" object has changed id (new instance for some reason?). But the rest of the stuff in the "Application" object are fine, only user has a problem.

Any ideas what could cause this? I guess out of memory or something? Any ideas on how to overcome this without having to do major changes (like adding an sqlite?)

Upvotes: 2

Views: 168

Answers (2)

Bonatti
Bonatti

Reputation: 2781

Any ideas what could cause this?

Most likely your object was not used or linked, so the Android OS targetted it as disposable, and the garbage collector freed its memory allocation

Any ideas on how to overcome this without having to do major changes (like adding an sqlite?)

Without seeing your code, it may be hard to help, however keep the following guidelines:

1 - Keep a direct link to the resources you are currently using (so, adding a attribute that links to your original object is fine

Boolean isFatherObjectAlive = "Original Object"."flag";

2 - Keep a command executing or an instruction that makes direct usage of the singleton object

singletonObject.doSomething();

Upvotes: 1

jan hruska
jan hruska

Reputation: 247

It is commont in android, you have to check it for null values and load them again.

Upvotes: 1

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