making a simple timer in C#

Question

I\'m still new to c# and i dont how to invoke the method updateTime() every ten seconds

public class MainActivity : Activity
{
    TextView timerViewer;
    priv         


        

Answer 1

1 - One usual way to do that in C# is to use a System.Threading.Timer, like so:

int count = 1;
TextView timerViewer;
private System.Threading.Timer timer;

protected override void OnCreate(Bundle bundle)
{
    base.OnCreate(bundle);
    SetContentView(Resource.Layout.Main);

    timerViewer = FindViewById(Resource.Id.textView1);

    timer = new Timer(x => UpdateView(), null, TimeSpan.FromSeconds(10), TimeSpan.FromSeconds(10));
}

private void UpdateView()
{
    this.RunOnUiThread(() => timerViewer.Text = string.Format("{0} ticks!", count++));
}

Notice that you need to use Activity.RunOnUiThread() in order to avoid cross-thread violations when accessing UI elements.

---

2 - Another, cleaner approach is to make use of C#'s Language-level support for asynchrony, which removes the need to manually marshal back and forth to the UI thread:

    protected override void OnCreate(Bundle bundle)
    {
        base.OnCreate(bundle);
        SetContentView(Resource.Layout.Main);

        timerViewer = FindViewById(Resource.Id.textView1);

        RunUpdateLoop();
    }

    private async void RunUpdateLoop()
    {
        int count = 1;
        while (true)
        {
            await Task.Delay(1000);
            timerViewer .Text = string.Format("{0} ticks!", count++);
        }
    }

Notice there's no need for Activity.RunOnUiThread() here. the C# compiler figures that out automatically.