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Editorial Team
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Asked: 2026-05-12T06:38:16+00:00

I use a single static class in my code that defines a static field

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I use a single static class in my code that defines a static field which I’m reusing between Activity onStop/onStart invocations. Here’s a scenario:

  1. User clicks on “Authorize” button (static data is initialized)
  2. Activity is stopped and web browser is called
  3. Browser executes callback and Activity is restored (static data is reused)

At least one of my users reports the failure at step 3 which I cannot reproduce but which looks like reset of static data

Any suggestions?

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1 Answer

  1. Editorial Team

    That is not safe. Your process can be killed between onStop and onStart, so all static data will be gone. In fact your activity can even be killed before it gets to onStop. In your tests the process was not killed, but it was for the user. See the Android activity life cycle which has a nice flow chart showing the possibilities.

    You need to store the data some other way, in prefs or database for example.

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