How to know activity has been finished?

Question

I want to check to see if an activity is running or finished. Is there any method through which I can check the status of activity?

I found activity.isFinishing() but I am not sure about it.

Can you say exactly what you want to do in your project so i can get some clear idea to solve your query.. — Harsh Trivedi, Jan 06 '12 at 11:13
running can take all matters of form, so i would be best know your purpose here. — njzk2, Jan 06 '12 at 11:14
some times we get window token error because activity get finish and dialog box still called so before calling dialog i want to check whether activity is running or not. — Connecting life with Android, Jan 09 '12 at 05:08
Using activity.isFinishing() is the right one solution. it return true if activity is finished so before creating dialog check for the condition. if true then create and show dialog. — Connecting life with Android, Dec 14 '12 at 05:44

score 21 · Accepted Answer · edited Jan 06 '12 at 11:27

21

If you want to perform any step before Activity is going to become invisible.

Their are several choices here.

onDestroy() - for final cleanup.

isFinishing() - right after act.finish() is called it will return true.

onStop() - when the Activity is killed by framework process. (not destroyed)

onPause() - when the Activity is covered by any other Activity

onBackPressed() - capturing the event of hardware Back key triggered by user.

edited Jan 06 '12 at 11:27

MKJParekh

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answered Jan 06 '12 at 11:25

Adil Soomro

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10

There is also `isDestoyed()` (added in API 17) http://developer.android.com/reference/android/app/Activity.html#isDestroyed%28%29 – Jared Rummler Sep 05 '15 at 07:46
Yes, it was released later, so that's why its not included in the answer. Thanks for mentioning. – Adil Soomro Sep 05 '15 at 10:33
I think the expression 'killed' can cause some confusion. For example, `onStop()` is called when another application comes to the foreground. But the Activity's state is maintained, so it's not killed :) – starriet Feb 05 '21 at 16:09

score 6 · Answer 2 · answered Oct 12 '18 at 23:31

6

Call isFinishing in the onPause method before the activity is destroyed:

@Override
protected void onPause() {
    super.onPause();
    if (isFinishing()) {
        // Here  you can be sure the Activity will be destroyed eventually
    }
}

answered Oct 12 '18 at 23:31

live-love

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score 0 · Answer 3 · answered Jul 06 '22 at 16:26

I realize this is very old, but for anyone using Kotlin:

We can check within a Fragment:

// FRAGMENT
override fun onPause() {
    super.onPause()
    // Log.v(TAG, "onPause");
    if(requireActivity().isChangingConfigurations) {
         // Config change
    } else {
        if(requireActivity().isFinishing) {
            // deal with activity ending (finish up viewModel etc)
        }
        // deal with rotate or other config changes as required
    }
}

Of course, we can also just do this directly inside an activity (just remove the requireActivity() parts).

How to know activity has been finished?

3 Answers3

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