Does Xamarin.Forms support periodic background tasks?

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隐瞒了意图╮
隐瞒了意图╮ 2021-02-02 02:47

I am having a difficult time finding documentation on background tasks support for Xamarin.Forms. Does Xamarin.Forms provide support for periodic background tasks?

I nee

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  • 2021-02-02 03:34

    XF has no implementation for background tasks. You will need to implement these natively. Below are examples on how to do it for each type of project.

    UWP

    https://github.com/Microsoft/Windows-universal-samples/tree/master/Samples/BackgroundTask

    Android https://developer.xamarin.com/guides/android/application_fundamentals/backgrounding/part_2_android_services/

    WinRT

    https://visualstudiomagazine.com/articles/2013/05/01/background-tasks-in-windows-store-apps.aspx

    iOS

    Just for those that want iOS as well. https://developer.xamarin.com/guides/ios/application_fundamentals/backgrounding/part_3_ios_backgrounding_techniques/

    Xamarin.Forms

    Going into more detail for each section is https://xamarinhelp.com/xamarin-background-tasks/

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  • 2021-02-02 03:37

    Yeas, but it depends what you need to do.

    You can for example use System.Threading.Timer (.net class) is Activity/Service

    private System.Threading.Timer timer;
    

    In Activity OnCreate

    TimeSpan timerTime = new TimeSpan(0, 0, 0, 0, 1000);
                timer = new System.Threading.Timer(new System.Threading.TimerCallback(OnTimerFired), null, timerTime, timerTime);
    

    In Activity OnDestroy

    if (timer != null)
                {
                    timer.Change(System.Threading.Timeout.Infinite, System.Threading.Timeout.Infinite);
                    timer.Dispose();
                    timer = null;
                }
    
    
    private void OnTimerFired(object state)
    {
        Do some periodic job
    }
    
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  • 2021-02-02 03:40

    I use Xamarin.Forms.Device.StartTimer Method, it starts a recurring timer using the device clock capabilities. While the callback returns true, the timer will keep recurring.

    http://developer.xamarin.com/api/member/Xamarin.Forms.Device.StartTimer/

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