Activity starting another activity. Guarantee that the first activity's onPause will be called before second's onResume

Question

I have an Activity A and Activity B. Activity A starts Activity B.

Is there a guarantee that A's onPause() will always be called before calling B's onResume()?

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score 4 · Accepted Answer · answered Jul 04 '13 at 06:46

4

Found the answer here:

When activity B is launched in front of activity A, this callback will be invoked on A. B will not be created until A's onPause() returns, so be sure to not do anything lengthy here.

answered Jul 04 '13 at 06:46

Mark Pazon

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score 2 · Answer 2 · answered Jul 04 '13 at 06:48

2

onPause ()

When activity B is launched in front of activity A, this callback will be invoked on A. B will not be created until A's onPause() returns, so be sure to not do anything lengthy here

http://developer.android.com/reference/android/app/Activity.html#onPause()

answered Jul 04 '13 at 06:48

Timmetje

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Yes, B will not be "created" (Does this created means onCreate?), but what will happened if B is already created? for example, B is in stop status? – Hui.Li Oct 13 '15 at 05:59

score 0 · Answer 3 · answered Jul 04 '13 at 06:45

Yes. Activity A's onPause() will be called before passing to Activity B's onResume() if the navigation is not the first time. If navigating to Activity B is for the first time, then Activity B's onCreate() will be called after Activity A's onPause(). Take a look at Activity's Lifecycle for clear understanding.

Activity starting another activity. Guarantee that the first activity's onPause will be called before second's onResume

3 Answers3