Xamarin.android using a timer and changing the UI

http://blog.csdn.net/ozhangsan12345/article/details/72653070

First step: Create a Timer object

[HTML]View PlainCopy

1. Create a Timer object
2. Timer _dispatchertimer;
3. Count
4. int sec = 60;

Step Two: Instantiate the timer and give the delegate an event

[HTML]View PlainCopy

1. TimerCallback timerdelegate = new TimerCallback (Tick);//tick for execution precautions
2. _dispatchertimer = New Timer (timerdelegate, NULL, 0, 1000);

Execution method

[HTML]View PlainCopy

2. public void Tick (object state)
4. {
6. This. Runonuithread (() =>
8. {
10. if (sec > 0)
12. {
14. SMSBT. Text = sec.   ToString () + "Second can be re-sent";
16. sec--;
18. }
20. Else
22. {
24. _dispatchertimer.dispose ();
26. sec = 60;
28. SMSBT.   Text = "Get Verification Code";
32. }
34. });
38. }

Use

[HTML]View PlainCopy

2. {
4. TimerCallback timerdelegate = new TimerCallback (Tick);
6. _dispatchertimer = new Timer (timerdelegate, NULL, 0, 1000);
8. ProgressDialog progressdialog = Progressdialog.show (This, "", "please later ...");
10. New Thread (new ThreadStart () =>
12. {
16. String URL = this . GetString (Resource.String.url) + "/appservices/userservices.aspx?  action=regsms ";
20. using (var http = new HttpClient ())
22. {
24. var content = new Formurlencodedcontent (new Dictionary<string, string> () {
26. {"Phone", Userphone. Text}
28. });
30. var response = http.  Postasync (URL, content);
32. string me = response. Result.Content.ReadAsStringAsync ().  Result;
34. Progressdialog.dismiss ();
36. This. Runonuithread (() =>
38. {
40. Handleresult (Me);
42. });
44. }
46. })). Start ();
48. }

Xamarin.android using a timer and changing the UI