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java - Android: How to keep count down timer running and display a message when time out , while I am in another activity? - Stack Overflow
![How to make a Countdown Timer in Android using Kotlin | John Codeos - Blog with Free iOS & Android Development Tutorials How to make a Countdown Timer in Android using Kotlin | John Codeos - Blog with Free iOS & Android Development Tutorials](https://johncodeos.com/media/2020/02/countdown-timer-android-tutorial-1.png)
How to make a Countdown Timer in Android using Kotlin | John Codeos - Blog with Free iOS & Android Development Tutorials
![How to make a Countdown Timer in Android using Kotlin | John Codeos - Blog with Free iOS & Android Development Tutorials How to make a Countdown Timer in Android using Kotlin | John Codeos - Blog with Free iOS & Android Development Tutorials](https://johncodeos.com/media/2020/02/countdown-timer-android-tutorial-thumbnail.png)