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Editorial Team
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Asked: 2026-06-18T00:05:43+00:00

I made a simple app to test the memory of Android. It has two

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I made a simple app to test the memory of Android.
It has two Activities, A and B.
A is a simple Activity with a button that starts B.
B consists of a pretty big image (jpg, 1024×768 pixel in mdpi)

When I monitor this process using DDMS, heap goes up as expected when moving from A to B.
When I press (hardware, or software using super.onBackPressed()) button on B and end up in A again, the heap does not shrink again, even after calling garbage collection. Is this expected? Will the memory taken up by B ever be released during the lifetime of the process?

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1 Answer

  1. Editorial Team

    Please note that the garbage collector works “nondeterministic“. In particular, even a call to the garbage collector does not mean that the memory is completely freed. It is only guaranteed that the memory is freed if more memory is requested.

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