Xamarin Forms - Disable auto-lock when the app is open

Question

I want to disable auto-lock when my app is open. How can I do that?

Answer 1

Xamarin.Forms:

//show something important, do not sleep
DependencyService.Get().ExecuteTask("cannotSleep");

//can put in OnDisappearing event
DependencyService.Get().ExecuteTask("canSleep");

Native tasks helper:

 public interface INativeTasks
    {
        ...
        void ExecuteTask(string task, object param=null);
        ...
    }

Android:

Global variables and other..

public class DroidCore
{
    private static DroidCore instance;
    public static DroidCore Current
    {
        get { return instance ?? (instance = new DroidCore()); }
    }

    public static Window MainWindow { get; set; }
    ...
}

MainActivity.cs

protected override void OnCreate(Bundle bundle)
{
...        
DroidCore.Current.MainView = this.Window.DecorView;
...
}

Native helpers:

public class NativeTasks : INativeTasks
    {
    public void ExecuteTask(string task, object param = null)
    {
            switch (task)
            {

                ... //any native stuff you can imagine

            case "cannotSleep":
                DroidCore.MainWindow.AddFlags(WindowManagerFlags.KeepScreenOn);
                break;

            case "canSleep":
                DroidCore.MainWindow.ClearFlags(WindowManagerFlags.KeepScreenOn);
                break;
            }
        }
}

iOS:

Native helpers:

public class NativeTasks : INativeTasks
    {
    public void ExecuteTask(string task, object param = null)
    {
            switch (task)
            {

                ... //any native stuff you can imagine

            case "cannotSleep":
                UIApplication.SharedApplication.IdleTimerDisabled = true;
                break;

            case "canSleep":
                UIApplication.SharedApplication.IdleTimerDisabled = false;
                break;
            }
        }
}