執行新的SMS接收背景事件
行動寬頻 SMS 平臺會針對接收的新 SMS 數據提供個別的系統事件,取決於它是來自電信業者或一般 SMS 訊息的系統管理 SMS 通知。 從行動網路電信業者接收之新系統管理 SMS 通知的背景系統事件,只能由行動寬頻應用程式存取。
應用程式必須已經收到使用者同意,才能使用SMS在背景工作中讀取新接收的SMS訊息。 如果應用程式第一次存取SMS,應用程式無法從背景工作讀取新接收的SMS訊息內容,因為應用程式無法從背景工作觸發系統SMS裝置同意提示。
下列程式代碼範例示範一項背景工作,其設計目的是在收到新的SMS訊息時執行。
C# 背景工作程序代碼
namespace SmsBackgroundSample
{
public sealed class SmsBackgroundTask : IBackgroundTask
{
// The Run method is the entry point of a background task.
public void Run(IBackgroundTaskInstance taskInstance)
{
// Associate a cancellation handler with the background task.
taskInstance.Canceled += new BackgroundTaskCanceledEventHandler(OnCanceled);
ManualResetEvent manualEventWaiter = new ManualResetEvent(false);
manualEventWaiter.Reset();
// Do the background task activity.
DisplayToastAsync(taskInstance, manualEventWaiter);
// Wait until the async operation is done. We need to do this else the background process will exit.
manualEventWaiter.WaitOne(5000);
Debug.Print("Background " + taskInstance.Task.Name + (" process ran"));
}
async void DisplayToastAsync(IBackgroundTaskInstance taskInstance, ManualResetEvent manualEventWaiter)
{
SmsReceivedEventDetails smsDetails = (SmsReceivedEventDetails)taskInstance.TriggerDetails;
SmsBinaryMessage smsEncodedmsg = (SmsBinaryMessage) smsDetails.BinaryMessageMessage;
SmsTextMessage smsTextMessage = Windows.Devices.Sms.SmsTextMessage.FromBinaryMessage(smsEncodedmsg);
XmlDocument toastXml = ToastNotificationManager.GetTemplateContent(ToastTemplateType.ToastText02);
XmlNodeList stringElements = toastXml.GetElementsByTagName("text");
stringElements.Item(0).AppendChild(toastXml.CreateTextNode(smsTextMessage.From));
stringElements.Item(1).AppendChild(toastXml.CreateTextNode(smsTextMessage.Body));
ToastNotification notification = new ToastNotification(toastXml);
ToastNotificationManager.CreateToastNotifier().Show(notification);
manualEventWaiter.Set();
}
}
用來註冊背景工作的 JavaScript 應用程式程式代碼
var triggerAway = new Windows.ApplicationModel.Background.SystemTrigger(Windows.ApplicationModel.Background.SystemTriggerType.smsReceived, false);
var builderAway = new Windows.ApplicationModel.Background.BackgroundTaskBuilder();
builderAway.setTrigger(triggerAway);
builderAway.taskEntryPoint = "HelloWorldBackground.BackgroundTask1";
builderAway.name = "Sms";
var taskAway = builderAway.register();
taskAway.addEventListener("progress", new ProgressHandler(taskAway).onProgress);
taskAway.addEventListener("completed", new CompleteHandler(taskAway).onCompleted);