Countdown Timer - Keep timer running when closing the app - Android Studio Tutorial

Published: 04 October 2020
on channel: Phuc VR
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Hello guys! In this tutorial, we will learn how to make a countdown timer but when the app was close, the timer keeps running.

Mindset: Main activity will listen for information from the Broadcast Service to update the GUI. Listening is only performed while the activity is running. That's mean you must register to listen before the main activity running and unregister after the main activity close

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