CODEWITHSUNDEEP
c#xamarinxamarin.formstimer
user13720211
user13720211

Reputation:

Xamarin Timer is not Running as long as it says

I have this code

Color[] colours = new Color[5]{Color.Red, Color.Blue, Color.Green, Color.Yellow, Color.Black};


    public int randGen(int lower, int upper)
    {
        Random random = new Random();
        return random.Next(lower, upper);
    }

    public PlayGame()
    {
        InitializeComponent();
    }

    protected override void OnAppearing()
    {
        base.OnAppearing();
        changeColour();
    }

    public void changeColour()
    {
        int milliseconds = randGen(1000, 5000);
        int count = 0;
        Device.StartTimer(TimeSpan.FromMilliseconds(milliseconds), () =>
        {
            var layout = new StackLayout { Padding = new Thickness(5, 10) };
            var label = new Label { Text = "Time: ", TextColor = Color.Green, FontSize = 25 };
            layout.Children.Add(label);

            label.Text += milliseconds.ToString();
            this.Content = layout;

            if (count < 4)
            {
                BackgroundColor = colours[count];
                count++;

                milliseconds = randGen(1000, 5000);
                return true;
            }
            else
            {
                BackgroundColor = Color.Black;
                return false;
            }

        }
        );

    }

Which has an array of colours. The idea is that every 1-5 seconds (which should be random each time), the background colour should change, and the text should write how long the screen was on for.

Currently, however, the time shown in the text is not reflective of the time each screen shows for, and I have some speculative concern that milliseconds in:

Device.StartTimer(TimeSpan.FromMilliseconds(milliseconds)

doesn't change at all. Any ideas?

Upvotes: 0

Views: 382

Answers (1)

Jason
Jason

Reputation: 89082

this is what I would do - have your timer fire every second (or whatever granularity you need) but only execute your code every X times

using System.Timers;

// these are class variables
Timer timer;
int timecount = 0;
// adjust this dynamically so your code only executes every 1-n seconds
int interval = 1;

// to this wherever you want to start the timer
timer = new Timer();
timer.Elapsed += Timer_Elapsed;
// fire every 1 sec
timer.Interval = 1000;
timer.Start();

// timer event handler
private void Timer_Elapsed(object sender, ElapsedEventArgs e)
{
    timecount++;

    if (timecount == interval)
    {
      timecount = 0;

      // do other stuff here
    }
}

Upvotes: 1

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