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One question about lifecycleobserver, After I debugged on galaxy S9 and detected lifecycleobserver is not much accurate, when I quit app (send it to background) and open it again continuously , sometime onStop doesnt work and it then failed to trigger any event of onStart and onStop then. Anyone faced this problem and found a solution? 

I just wanted to detect if or not app is in background to process the event of passcode screen of the App.

Thank you so much

I do I have a blog post is a little old but i think is still viable  <https://link.medium.com/oNta4kr1Qcb|https://link.medium.com/oNta4kr1Qcb> snd me a message if this does not help u

there are still some cases , when I close app and open app too fast, it means onStop didnt start, but I opened app to trigger onStart again, then it doesnt work either like the 1st case I posted above . Did you faced the problem like that before?

Hey, my test is ok on simulator, that issue only can reproduce on galaxy s9.on S9, when I open the app before onStop is triggered, then it happened that way, anyway thank you