Android is using the same instance activity after destroyed

Question

• I'm using a LoginActivity to Log in with Smart Lock .

• I start the LoginActivity as startActivityForResult . I'm interested in if Smart Lock has a credential, and return RESULT_OK if everything is ok. Then I call finish() :

   loginActivityViewPresenter.setResult(RESULT_OK) loginActivityViewPresenter.finish() 

After this, onDestroy() is called. Let's imagine this is the instance @7161 .

Then I log out, and I want to log in again, and the same instance is on the top @7161 .

Functions like isDestroyed() or isFinishing() are always true.

Why?

Answer 1

It looks like the AsyncTasks you are using or some other object are keeping are a reference to your activity and the android framework is using that existing activity when you start it again.

You can determine this by doing a heap dump after finishing the activity and looking at the references to this activity.

You could also use a tool called Leak Canary.