private async void RegToastBackgroundTask()
{
// 判断一下是否允许访问后台任务
var status = await BackgroundExecutionManager.RequestAccessAsync();
if (status == BackgroundAccessStatus.Denied || status == BackgroundAccessStatus.Unspecified)
{
return;
}
Type type = typeof(BackgroundTasks.ToastBackgroundTask);
var task = BackgroundTaskRegistration.AllTasks.Values.FirstOrDefault(t => t.Name == type.Name);
if (task == null)
{
// 注册后台任务
var tBuilder = new BackgroundTaskBuilder();
tBuilder.Name = type.Name;
tBuilder.TaskEntryPoint = type.FullName;
// 声明触发器
var trigger = new ToastNotificationActionTrigger();
tBuilder.SetTrigger(trigger);
task = tBuilder.Register();
}
}
private async void btnShowActionToast_Tapped(object sender, TappedRoutedEventArgs e)
{
var trigger = new ToastNotificationActionTrigger();
var reg = await RegisterBackgroundTask(typeof(AdaptiveToastTrigger.ToastTriggerTask).FullName,
trigger.GetType().Name, trigger, null);
await ShowAdaptiveToast("ms-appx:///assets/AdaptiveActionToast.xml");
}
/// <summary>
/// Registers a particular bg tasks specified by <paramref name="backgroundTask"/>
/// </summary>
/// <param name="backgroundTask">The background task to register</param>
/// <param name="restart">Indicates if the registration of the bg task is mandatory(True by default)</param>
public static void RegisterBackgroundTask(BackgroundTaskType backgroundTask, int bgTaskInterval = 0, bool restart = true)
{
string bgTaskName;
Type bgTaskType;
IBackgroundTrigger trigger;
var conditions = new List <IBackgroundCondition>();
switch (backgroundTask)
{
case BackgroundTaskType.ANY:
throw new ArgumentException("Is not allowed to register all bg tasks at the same time");
case BackgroundTaskType.SYNC:
bgTaskName = nameof(SyncBackgroundTask);
bgTaskType = typeof(SyncBackgroundTask);
trigger = new TimeTrigger((uint)bgTaskInterval, false);
conditions.Add(new SystemCondition(SystemConditionType.FreeNetworkAvailable));
conditions.Add(new SystemCondition(SystemConditionType.InternetAvailable));
break;
case BackgroundTaskType.MARK_AS_COMPLETED:
bgTaskName = nameof(MarkAsCompletedBackgroundTask);
bgTaskType = typeof(MarkAsCompletedBackgroundTask);
trigger = new ToastNotificationActionTrigger();
break;
default:
throw new ArgumentOutOfRangeException($"Provided bg task {backgroundTask} does not exists");
}
bool isBgTaskAlreadyRegistered = BackgroundTaskHelper.IsBackgroundTaskRegistered(bgTaskType);
if (isBgTaskAlreadyRegistered && !restart)
{
return;
}
if (isBgTaskAlreadyRegistered)
{
UnregisterBackgroundTask(backgroundTask);
}
if (bgTaskInterval <= 0 && backgroundTask != BackgroundTaskType.MARK_AS_COMPLETED)
{
return;
}
BackgroundTaskHelper.Register(
bgTaskName,
trigger,
false,
true,
conditions.ToArray());
}
void ConfigureToastActions()
{
try
{
var trigger = new ToastNotificationActionTrigger();
var condition = new SystemCondition(SystemConditionType.InternetAvailable);
var builder = new BackgroundTaskBuilder();
builder.Name = "ToastTask";
builder.SetTrigger(trigger);
builder.AddCondition(condition);
var task = builder.Register();
}
catch (Exception ex)
{
Diag.DebugPrint("Exception caught while setting up toast actions " + ex.Message);
}
}
private async Task InitializeApplication()
{
//copy images to appdata
var local_folder = Windows.Storage.ApplicationData.Current.LocalFolder;
var install_path = Windows.ApplicationModel.Package.Current.InstalledLocation;
var media_path = await install_path.GetFolderAsync("media\\images");
var images = await media_path.GetFilesAsync();
foreach (var image in images)
{
try
{
await local_folder.GetFileAsync(image.Name);
continue;
}
catch { }
await image.CopyAsync(local_folder, image.Name, ReplaceExisting);
}
//initialize contacts watcher
await StartBackgroundTaskAsync(() =>
{
var task_name = "contacts-watcher";
var previous_task_list = BackgroundTaskRegistration.AllTasks.Values;
var registered = previous_task_list.Where(i => i.Name == task_name).FirstOrDefault();
registered?.Unregister(true);
//registered = null;
//if (registered == null)
//{
// BackgroundTaskBuilder task_builder = new BackgroundTaskBuilder();
// task_builder.Name = task_name;
// task_builder.TaskEntryPoint = typeof(ContactsWatcher).ToString();
// ContactStoreNotificationTrigger contact_trigger = new ContactStoreNotificationTrigger();
// task_builder.SetTrigger(contact_trigger);
// task_builder.Register();
//}
});
//initialize actionable toast server
await StartBackgroundTaskAsync(() =>
{
var task_name = "contacts-toast-server";
var previous_task_list = BackgroundTaskRegistration.AllTasks.Values;
var registered = previous_task_list.Where(i => i.Name == task_name).FirstOrDefault();
registered?.Unregister(true);
registered = null;
if (registered == null)
{
BackgroundTaskBuilder task_builder = new BackgroundTaskBuilder();
task_builder.Name = task_name;
task_builder.TaskEntryPoint = typeof(ActionableToastServer).ToString();
ToastNotificationActionTrigger toast_trigger = new ToastNotificationActionTrigger();
task_builder.SetTrigger(toast_trigger);
task_builder.Register();
}
});
//initialize location
await InitializeLocation();
}
