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Background timer stops after a while when the phone is locked [Android]

See original GitHub issue

This is the example of the code

var time = 0; 
BackgroundTimer.setInterval(() => {
 time ++;
console.log(time)
}, 1000)

Let say in my log it shows

...
331
332
333
...

Then the timer stop here When I unlocked my phone again and open the app again

The variable of time suddenly increase many times. It seems like the adding process stack and run at once. This happened when I test the app on my device without USB connection. However with USB connection, the problem resolved (most likely is because it is charged when connected with USB ) The phone model is Google Pixel 1 and Android version is 9. The battery optimization is disabled already. Does anybody have this issue as well?

Issue Analytics

State:
Created 4 years ago
Reactions:10
Comments:11

Top GitHub Comments

3reactions

mfleungaccommented, Aug 4, 2019

Same here. Android 9, samsung a20. Timer stop after 15min the app is in background. It resumes after unlocking the phone just like you said.

1reaction

juanamdcommented, May 27, 2021

Hi, I had this same issue and found no easy solution with this library, so I made my own which works even if the device is locked (among other improvements). Only Android is supported, but you can still use this (or another) library for iOS in conjunction.

https://www.npmjs.com/package/react-native-background-timer-android

I’ve been using it in my production apps for more than a week with no issues.

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