Can't Find The Leak, On My Fragment Android Code

I have a TabLayout, under each tab there is a Fragment (I'm using ArrayPagerAdapter). I've noticed that when I switch many times from a tab to another, my memory usage increase a l

Solution 1:

Note to others: the poster and I had an off-SO discussion about this issue, and the poster created this sample app that was able to reproduce the problem.

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After some struggling, I was able to get LeakCanary to work. It required 1.4-beta1 versus the shipping 1.3.1. All I needed to do was add the dependencies and set up an Application subclass per the LeakCanary docs. Then, launch the app and press BACK once the activity appears.

You get:

Whether this is a framework bug or something introduced by appcompat-v7 and its specific subclass of MultiAutoCompleteTextView, I can't say at present. However, it is definitely not a bug in your code.

Clearing the adapter from the MultiAutoCompleteTextView (setAdapter(null)) in onDestroyView() of the fragment should prevent it from leaking the activity, but the widget itself will still leak. A quick scan of the relevant code does not give me much hope that the leak itself can be fixed without modifications to either the framework (for MultiAutoCompleteTextView) or appcompat-v7 (for its subclass).