Bug 41033 - Device.StartTimer does not stop when returning false from the action on Android
Summary: Device.StartTimer does not stop when returning false from the action on Android
Alias: None
Product: Forms
Classification: Xamarin
Component: Android ()
Version: 2.2.0
Hardware: PC Windows
: --- normal
Target Milestone: ---
Assignee: Bugzilla
Depends on:
Reported: 2016-05-11 19:07 UTC by Roger Peters
Modified: 2016-06-03 20:36 UTC (History)
2 users (show)

Tags: Android ac
Is this bug a regression?: ---
Last known good build:

Simple test app showing Device.StartTimer issue (244.09 KB, application/x-zip-compressed)
2016-05-11 19:07 UTC, Roger Peters

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Description Roger Peters 2016-05-11 19:07:44 UTC
Created attachment 15975 [details]
Simple test app showing Device.StartTimer issue

According to the documentation for Device.StartTimer() (https://developer.xamarin.com/api/member/Xamarin.Forms.Device.StartTimer/p/System.TimeSpan/System.Func%7BSystem.Boolean%7D/), returning false from the Action passed in should cause the timer to stop running. This is true on iOS, however on Android the timer runs indefinitely despite returning false.

Sample code:
      Device.StartTimer(TimeSpan.FromMilliseconds(1), () =>
        Device.BeginInvokeOnMainThread(() =>  _outLabel.Text = _count.ToString());

        return false;

I tried this on both and and both had the issue. Simple repro attached.
Comment 1 E.Z. Hart [MSFT] 2016-06-03 20:36:36 UTC
This is fixed as of