Hello! , I am starting a new Activity by using `st...

# android

[Udit003]

Hello! , I am starting a new Activity by using startActivity(intent) and finish() , but my viewModel onCleared() method is not called . What is the reason. I am using koin for di. Appcompat library 'com.android.supportsupport v427.1.1' .

[gildor]

Probably your activity leaked

[Udit003]

But onDestroy is called for the activity.

[gildor]

Activity still can be alive. Not sure how ViewModel behaves in this case (activity lifecycle in destroyed state, but activity leaked)

[Udit003]

How can I find if that's the case. Can you suggest me ways to proceed from here

[gildor]

Maybe you could debug your code or check memory dump to check this theory

[Ulrik Bech Hald]

Afaik the ViewModels are (by default, but you can change that) bound to a store owned by a retained Fragment, which lives beyond the lifecycle of the Activity instance (to survive configuration changes). Only when the retained fragment is destroyed will you see `onCleared()`invoked.

[Ulrik Bech Hald]

Also, it’s not too difficult to trace that from the arch lib source - always recommended.

[Sam]

@Udit003 LeakCanary identifies finished activity with active references to it. Can you share a github project reproducing the issue?

[Udit003]

Sorry guys, Actually it was a silly mistake by me. Rather than injecting the viewmodel using by viewModel() , I used by inject() . Because of which koin was not able to attach the viewmodel to the lifecycle of activity. But thanks for all your suggestions. In the debugging process, I got introduced to LeakCanary, so it was helpful.

[Sam]

@Udit003 I have it enabled it always in Debug builds, helps find out regressions as they occur. But it can't catch all kinds of memory usage issues.