Xamarin.Android 使用Timer 並更改UI

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

 

第一步：建立timer對象

 

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1. //建立timer對象  
2.       Timer _dispatcherTimer;  
3.       //計數  
4.       int sec = 60;  

第二步： 執行個體化timer並給委託事件

 

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1. TimerCallback timerDelegate = new TimerCallback(Tick); //tick為執行防範  
2. _dispatcherTimer = new Timer(timerDelegate, null, 0, 1000);    

//執行方法

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1. public void Tick(object state)  
2.       {  
3.           this.RunOnUiThread(() =>  
4.           {  
5.               if (sec > 0)  
6.               {  
7.                   smsbt.Text = sec.ToString() + "秒可重發";   
8.                   sec--;  
9.               }  
10.               else  
11.               {  
12.                   _dispatcherTimer.Dispose();  
13.                   sec = 60;  
14.                   smsbt.Text = "擷取驗證碼";   
15.   
16.               }  
17.           });  
18.            
19.       }  

 

//使用

 

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1. {  
2.                        TimerCallback timerDelegate = new TimerCallback(Tick);  
3.                        _dispatcherTimer = new Timer(timerDelegate, null, 0, 1000);  
4.                        ProgressDialog progressDialog = ProgressDialog.Show(this, "", "請稍後...");  
5.                        new Thread(new ThreadStart(() =>  
6.                        {  
7.   
8.                            string url = this.GetString(Resource.String.url) + "/AppServices/userServices.aspx?action=regSms";  
9.   
10.                            using (var http = new HttpClient())  
11.                            {  
12.                                var content = new FormUrlEncodedContent(new Dictionary<string, string>() {  
13.                        { "phone",userphone.Text }  
14.                            });  
15.                                var response = http.PostAsync(url, content);  
16.                                string me = response.Result.Content.ReadAsStringAsync().Result;  
17.                                progressDialog.Dismiss();  
18.                                this.RunOnUiThread(() =>  
19.                                {  
20.                                HandleResult(me);  
21.                                });  
22.                            }  
23.                        })).Start();  
24.                    } 

Xamarin.Android 使用Timer 並更改UI