# ionScroll event doesn't work properly on android emulator

**URL:** <https://forum.ionicframework.com/t/ionscroll-event-doesnt-work-properly-on-android-emulator/106656>\
**Category:** ionic-v3\
**Created:** [September 25, 2017, 2:49pm UTC](https://forum.ionicframework.com/t/ionscroll-event-doesnt-work-properly-on-android-emulator/106656 "2017-09-25T14:49:57Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![seevoovapp](https://avatars.discourse-cdn.com/v4/letter/s/13edae/32.png) [@seevoovapp](https://forum.ionicframework.com/u/seevoovapp)\
**Post date:** [September 25, 2017, 2:49pm UTC](https://forum.ionicframework.com/t/ionscroll-event-doesnt-work-properly-on-android-emulator/106656/1 "2017-09-25T14:49:57Z")

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Hi,

I am using ionScroll to detect scroll events of the main content. In a web browser it works as expected: it shoots every couple of pixels. But on an emulator (I don’t have a device yet), the event shoots only when the scroll ends. Can anyone advice? Also, the velocity parameters are always 0 both on the browser, and the emulator :-/

`this.content.ionScroll.subscribe((scrollEvent: ScrollEvent) => { this.zone.run(() => { this.onContentScroll(scrollEvent); }); });`

Thanks