private async void RegistTask()
{
// Otherwise request access
var status = await BackgroundExecutionManager.RequestAccessAsync();
if (status == BackgroundAccessStatus.DeniedBySystemPolicy || status == BackgroundAccessStatus.Unspecified)
{
string title = "应用后台活动被禁止";
string content = "由于系统限制，应用程序无法在后台活动。" +
"若希望使此应用在后台活动，请尝试更改电源设置以及插入外部电源";
ToastManagement tm = new ToastManagement(title, content, ToastManagement.ErrorMessage);
tm.ToastPush(120);
}
else
{
foreach (var i in BackgroundTaskRegistration.AllTasks.Values)
{
if (i.Name.Equals("TimeBackgroundTrigger"))
{
i.Unregister(true);//将之前的时间触发器任务注销
}
}
//注册新的时间触发器
BackgroundTaskBuilder timeBuilder = new BackgroundTaskBuilder();
timeBuilder.Name = "TimeBackgroundTrigger";
timeBuilder.SetTrigger(new TimeTrigger(Convert.ToUInt32(c.time), true));
timeBuilder.IsNetworkRequested = true;
timeBuilder.AddCondition(new SystemCondition(SystemConditionType.InternetAvailable));
BackgroundTaskRegistration task = timeBuilder.Register();
}
}
private async void BeginExtendedExecution()
{
// The previous Extended Execution must be closed before a new one can be requested.
ClearExtendedExecution();
var newSession = new ExtendedExecutionSession();
newSession.Reason = ExtendedExecutionReason.Unspecified;
newSession.Description = "Raising periodic toasts";
newSession.Revoked += SessionRevoked;
ExtendedExecutionResult result = await newSession.RequestExtensionAsync();
switch (result)
{
case ExtendedExecutionResult.Allowed:
session = newSession;
break;
default:
case ExtendedExecutionResult.Denied:
newSession.Dispose();
//建立Toast通知
string title = "Pixiv Wallpaper for Windows 10活动被禁止";
string content = "由于系统限制，应用程序无法在后台继续活动。";
ToastManagement tm = new ToastManagement(title, content, ToastManagement.ErrorMessage);
tm.ToastPush(120);
break;
}
}
private async void SessionRevoked(object sender, ExtendedExecutionRevokedEventArgs args)
{
//session被系统回收时记录原因，session被回收则无法保持后台运行
await Dispatcher.RunAsync(CoreDispatcherPriority.Normal, () =>
{
switch (args.Reason)
{
case ExtendedExecutionRevokedReason.Resumed:
Debug.WriteLine("Extended execution revoked due to returning to foreground.");
break;
case ExtendedExecutionRevokedReason.SystemPolicy:
Debug.WriteLine("Extended execution revoked due to system policy.");
string title = "Pixiv Wallpaper for Windows 10后台活动被系统关闭";
string content = "系统回收了应用的会话资源，应用程序在后台时将会被挂起无法继续运行。" +
"若希望使此应用在后台活动，请尝试插入外部电源或更改电源设置允许应用运行后台任务";
ToastManagement tm = new ToastManagement(title, content, ToastManagement.ExtendedRevoked);
tm.ToastPush(120);
break;
}
});
}
public async void SetWallpaper(bool done)
{
if (done)
{
var dialog = new MessageDialog("");
if (!UserProfilePersonalizationSettings.IsSupported())
{
string title = "您的设备不支持自动更换壁纸";
string content = " ";
ToastManagement tm = new ToastManagement(title, content, ToastManagement.ErrorMessage);
tm.ToastPush(60);
return;
}
UserProfilePersonalizationSettings settings = UserProfilePersonalizationSettings.Current;
StorageFile file = null;
try
{
file = await StorageFile.GetFileFromApplicationUriAsync(new Uri("ms-appdata:///local/" + img.imgId + ".jpg"));
}
catch (Exception)
{
timer.Interval = TimeSpan.FromSeconds(2);
timer.Start();
}
if (c.lockscr)
{
//更换锁屏
bool lockscr = await settings.TrySetLockScreenImageAsync(file);
if (!lockscr)
{
string title = "更换锁屏操作失败";
string content = " ";
ToastManagement tm = new ToastManagement(title, content, ToastManagement.ErrorMessage);
tm.ToastPush(60);
}
}
//更换壁纸
bool deskscr = await settings.TrySetWallpaperImageAsync(file);
if (!deskscr)
{
string title = "更换壁纸操作失败";
string content = " ";
ToastManagement tm = new ToastManagement(title, content, ToastManagement.ErrorMessage);
tm.ToastPush(60);
}
else
{
//推送Toast通知
string title = "成功更换壁纸";
string content = img.imgName + "\r\n"
+ "id" + img.imgId + "\r\n"
+ "作者: " + img.userName;
string image = file.Path;
ToastManagement tm = new ToastManagement(title, content, ToastManagement.WallpaperUpdate, image);
tm.ToastPush(10);
}
}
}
