重新想象 Windows 8 Store Apps (59)

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重新想象 Windows 8 Store Apps (59) - 锁屏　　
作者：webabcd

介绍
重新想象 Windows 8 Store Apps 之 锁屏

• 登录锁屏，获取当前程序的锁屏权限，从锁屏中移除
  
• 发送徽章或文本到锁屏
  
• 将一个 app 的多个 tile 绑定到锁屏
  
• 自定义锁屏图片
  

　　
示例
1、演示如何登录锁屏，获取当前程序的锁屏权限，从锁屏中移除
LockScreen/AccessLockScreen.xaml













　　LockScreen/AccessLockScreen.xaml.cs



/*
* 演示如何登录锁屏，获取当前程序的锁屏权限，从锁屏中移除
*
* 注：
* 要想请求锁屏权限，需要后台任务支持“推送通知”或“控制通道”
*/
using System;
using Windows.ApplicationModel.Background;
using Windows.UI.Xaml;
using Windows.UI.Xaml.Controls;
namespace XamlDemo.LockScreen
{
public sealed partial class AccessLockScreen : Page
{
public AccessLockScreen()
{
this.InitializeComponent();
}
private async void btnRequestAccess_Click(object sender, RoutedEventArgs e)
{
try
{
// 向系统请求登录锁屏，会弹出确认对话框
//     需要后台任务支持“推送通知”或“控制通道”，否则会抛出异常
//     不能在模拟器中运行
//     如果 BackgroundAccessStatus 不等于 Unspecified，则即使调用 RequestAccessAsync() 也不会出现对话框，需要用户去“设置”中去添加或移除锁屏应用
BackgroundAccessStatus status = await BackgroundExecutionManager.RequestAccessAsync();
/*
* BackgroundAccessStatus - 当前 app 的锁屏权限
*     Unspecified - 用户尚未选择
*     Denied - 被用户拒绝
*     AllowedWithAlwaysOnRealTimeConnectivity - 用于允许了，且支持实时连接，即使电量低
*     AllowedMayUseActiveRealTimeConnectivity - 用于允许了，且支持实时连接，但是如果电量低则无法实时连接
*/
lblMsg.Text = "RequestAccessAsync(): " + status.ToString();
}
catch (Exception ex)
{
lblMsg.Text = ex.ToString();
}
}
private void btnGetAccessStatus_Click(object sender, RoutedEventArgs e)
{
try
{
// 获取当前应用程序的锁屏权限
BackgroundAccessStatus status = BackgroundExecutionManager.GetAccessStatus();
lblMsg.Text = "GetAccessStatus(): " + status.ToString();
}
catch (Exception ex)
{
lblMsg.Text = ex.ToString();
}
}
private void btnRemoveAccess_Click(object sender, RoutedEventArgs e)
{
try
{
// 将当前应用程序从锁屏中移除
                BackgroundExecutionManager.RemoveAccess();
lblMsg.Text = "RemoveAccess()";
}
catch (Exception ex)
{
lblMsg.Text = ex.ToString();
}
}
}
}
　　
2、演示如何发送徽章或文本到锁屏
LockScreen/SendNotification.xaml











　　LockScreen/SendNotification.xaml.cs



/*
* 演示如何发送徽章或文本到锁屏
*
* 注：
* 如果需要发送文本到锁屏，需要手动在“设置”中将 app 添加到“选择要显示详细状态的应用”中
*
* 另：
* 关于 tile 和 badge 请参见：XamlDemo/Tile
*/
using NotificationsExtensions.BadgeContent;
using NotificationsExtensions.TileContent;
using Windows.UI.Notifications;
using Windows.UI.Xaml;
using Windows.UI.Xaml.Controls;
namespace XamlDemo.LockScreen
{
public sealed partial class SendNotification : Page
{
public SendNotification()
{
this.InitializeComponent();
}
private void btnSendBadge_Click(object sender, RoutedEventArgs e)
{
// 发送 badge 到锁屏
BadgeNumericNotificationContent badgeContent = new BadgeNumericNotificationContent(3);
BadgeNotification badge = badgeContent.CreateNotification();
BadgeUpdater badgeUpdater = BadgeUpdateManager.CreateBadgeUpdaterForApplication();
badgeUpdater.Update(badge);
}
private void btnSendTile_Click(object sender, RoutedEventArgs e)
{
// 发送文本到锁屏，前提是此 app 在“选择要显示详细状态的应用”中
ITileWideSmallImageAndText03 tileContent = TileContentFactory.CreateTileWideSmallImageAndText03();
tileContent.TextBodyWrap.Text = "hello webabcd";
tileContent.Image.Src = "ms-appx:///Assets/Logo.png";
tileContent.RequireSquareContent = false;
TileUpdateManager.CreateTileUpdaterForApplication().Update(tileContent.CreateNotification());
}
}
}
　　
3、演示如何将一个 app 的多个 tile 绑定到锁屏
LockScreen/MultipleTiles.xaml











　　LockScreen/MultipleTiles.xaml.cs



/*
* 演示如何将一个 app 的多个 tile 绑定到锁屏
*
* 要想将 SecondaryTile 绑定到锁屏，需要注意：
* 1、需要设置 SecondaryTile 的 LockScreenBadgeLogo
* 2、如果需要文本支持则还需要设置 SecondaryTile 的 LockScreenDisplayBadgeAndTileText 为 true
* 3、需要手动在“设置”中将 SecondaryTile 添加到锁屏，当然如果需要文本支持则需要手动将 app 添加到“选择要显示详细状态的应用”中
*/
using NotificationsExtensions.BadgeContent;
using NotificationsExtensions.TileContent;
using System;
using Windows.UI.Notifications;
using Windows.UI.Popups;
using Windows.UI.StartScreen;
using Windows.UI.Xaml;
using Windows.UI.Xaml.Controls;
using XamlDemo.Common;
namespace XamlDemo.LockScreen
{
public sealed partial class MultipleTiles : Page
{
private string _tile1Id = "123";
private string _tile2Id = "456";
public MultipleTiles()
{
this.InitializeComponent();
}
// 仅支持 badge 的可以登录锁屏的 SecondaryTile
private async void btnOnlyBadge_Click(object sender, RoutedEventArgs e)
{
SecondaryTile secondTile = new SecondaryTile(
_tile1Id,
"testOnlyBadge",
"testOnlyBadge",
"argument1",
TileOptions.ShowNameOnLogo,
new Uri("ms-appx:///Assets/Logo.png")
);
// 需要指定 LockScreenBadgeLogo
secondTile.LockScreenBadgeLogo = new Uri("ms-appx:///Assets/BadgeLogo.png");
bool isPinned = await secondTile.RequestCreateForSelectionAsync(Helper.GetElementRect((FrameworkElement)sender), Placement.Above);
if (isPinned)
{
BadgeNumericNotificationContent badgeContent = new BadgeNumericNotificationContent(2);
BadgeUpdateManager.CreateBadgeUpdaterForSecondaryTile(_tile1Id).Update(badgeContent.CreateNotification());
}
}
// 即支持徽章又支持文本的可以登录锁屏的 SecondaryTile
private async void btnBadgeAndText_Click(object sender, RoutedEventArgs e)
{
SecondaryTile secondTile = new SecondaryTile(
_tile2Id,
"testBadgeAndText",
"testBadgeAndText",
"argument2",
TileOptions.ShowNameOnLogo | TileOptions.ShowNameOnWideLogo,
new Uri("ms-appx:///Assets/Logo.png"),
new Uri("ms-appx:///Assets/WideLogo.png")
);
// 需要指定 LockScreenBadgeLogo
secondTile.LockScreenBadgeLogo = new Uri("ms-appx:///Assets/BadgeLogo.png");
// 需要设置 LockScreenDisplayBadgeAndTileText 为 true
secondTile.LockScreenDisplayBadgeAndTileText = true;
bool isPinned = await secondTile.RequestCreateForSelectionAsync(Helper.GetElementRect((FrameworkElement)sender), Placement.Above);
if (isPinned)
{
ITileWideText03 tileContent = TileContentFactory.CreateTileWideText03();
tileContent.TextHeadingWrap.Text = "hello webabcd";
tileContent.RequireSquareContent = false;
TileUpdateManager.CreateTileUpdaterForSecondaryTile(_tile2Id).Update(tileContent.CreateNotification());
}
}
}
}
　　
4、演示如何自定义锁屏图片
LockScreen/CustomLockScreenImage.xaml











　　LockScreen/CustomLockScreenImage.xaml.cs



/*
* 演示如何自定义锁屏图片
*/
using System;
using Windows.Storage;
using Windows.Storage.Pickers;
using Windows.Storage.Streams;
using Windows.UI.Xaml;
using Windows.UI.Xaml.Controls;
using Windows.UI.Xaml.Media.Imaging;
using XamlDemo.Common;
namespace XamlDemo.LockScreen
{
public sealed partial class CustomLockScreenImage : Page
{
public CustomLockScreenImage()
{
this.InitializeComponent();
}
private async void btnDemo_Click(object sender, RoutedEventArgs e)
{
if (Helper.EnsureUnsnapped())
{
FileOpenPicker imagePicker = new FileOpenPicker
{
ViewMode = PickerViewMode.Thumbnail,
SuggestedStartLocation = PickerLocationId.PicturesLibrary,
FileTypeFilter = { ".jpg", ".jpeg", ".png", ".bmp" }
};
StorageFile imageFile = await imagePicker.PickSingleFileAsync();
if (imageFile != null)
{
// 将指定的图片设置为锁屏图片
await Windows.System.UserProfile.LockScreen.SetImageFileAsync(imageFile);
// 获取当前的锁屏图片
IRandomAccessStream imageStream = Windows.System.UserProfile.LockScreen.GetImageStream();
if (imageStream != null)
{
BitmapImage lockScreenImage = new BitmapImage();
lockScreenImage.SetSource(imageStream);
img.Source = lockScreenImage;
}
}
}
}
}
}
　　
OK
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