原文:重新想象 Windows 8 Store Apps (59) - 鎖屏

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重新想象 Windows 8 Store Apps (59) - 鎖屏

作者：webabcd


介紹
重新想象 Windows 8 Store Apps 之?鎖屏

• 登錄鎖屏，獲取當(dāng)前程序的鎖屏權(quán)限，從鎖屏中移除
• 發(fā)送徽章或文本到鎖屏
• 將一個(gè) app 的多個(gè) tile 綁定到鎖屏
• 自定義鎖屏圖片

示例
1、演示如何登錄鎖屏，獲取當(dāng)前程序的鎖屏權(quán)限，從鎖屏中移除
LockScreen/AccessLockScreen.xaml

<Pagex:Class="XamlDemo.LockScreen.AccessLockScreen"xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"xmlns:local="using:XamlDemo.LockScreen"xmlns:d="http://schemas.microsoft.com/expression/blend/2008"xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"mc:Ignorable="d"><Grid Background="Transparent"><StackPanel Margin="120 0 0 0"><TextBlock Name="lblMsg" FontSize="14.667" /><Button Name="btnRequestAccess" Content="請(qǐng)求登錄鎖屏" Margin="0 10 0 0" Click="btnRequestAccess_Click" /><Button Name="btnGetAccessStatus" Content="獲取當(dāng)前程序的鎖屏權(quán)限" Margin="0 10 0 0" Click="btnGetAccessStatus_Click" /><Button Name="btnRemoveAccess" Content="從鎖屏中移除" Margin="0 10 0 0" Click="btnRemoveAccess_Click" /></StackPanel></Grid> </Page>

LockScreen/AccessLockScreen.xaml.cs

/** 演示如何登錄鎖屏，獲取當(dāng)前程序的鎖屏權(quán)限，從鎖屏中移除* * 注：* 要想請(qǐng)求鎖屏權(quán)限，需要后臺(tái)任務(wù)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{// 向系統(tǒng)請(qǐng)求登錄鎖屏，會(huì)彈出確認(rèn)對(duì)話框// 需要后臺(tái)任務(wù)支持“推送通知”或“控制通道”，否則會(huì)拋出異常// 不能在模擬器中運(yùn)行// 如果 BackgroundAccessStatus 不等于 Unspecified，則即使調(diào)用 RequestAccessAsync() 也不會(huì)出現(xiàn)對(duì)話框，需要用戶去“設(shè)置”中去添加或移除鎖屏應(yīng)用BackgroundAccessStatus status = await BackgroundExecutionManager.RequestAccessAsync();/** BackgroundAccessStatus - 當(dāng)前 app 的鎖屏權(quán)限* Unspecified - 用戶尚未選擇* Denied - 被用戶拒絕* AllowedWithAlwaysOnRealTimeConnectivity - 用于允許了，且支持實(shí)時(shí)連接，即使電量低* AllowedMayUseActiveRealTimeConnectivity - 用于允許了，且支持實(shí)時(shí)連接，但是如果電量低則無(wú)法實(shí)時(shí)連接*/lblMsg.Text = "RequestAccessAsync(): " + status.ToString();}catch (Exception ex){lblMsg.Text = ex.ToString();}}private void btnGetAccessStatus_Click(object sender, RoutedEventArgs e){try{// 獲取當(dāng)前應(yīng)用程序的鎖屏權(quán)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{// 將當(dāng)前應(yīng)用程序從鎖屏中移除 BackgroundExecutionManager.RemoveAccess();lblMsg.Text = "RemoveAccess()";}catch (Exception ex){lblMsg.Text = ex.ToString();}}} }

2、演示如何發(fā)送徽章或文本到鎖屏
LockScreen/SendNotification.xaml

<Pagex:Class="XamlDemo.LockScreen.SendNotification"xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"xmlns:local="using:XamlDemo.LockScreen"xmlns:d="http://schemas.microsoft.com/expression/blend/2008"xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"mc:Ignorable="d"><Grid Background="Transparent"><StackPanel Margin="120 0 0 0"><Button Name="btnSendBadge" Content="send badage to lock screen" Click="btnSendBadge_Click" /><Button Name="btnSendTile" Content="send tile text to lock screen" Margin="0 10 0 0" Click="btnSendTile_Click" /></StackPanel></Grid> </Page>

LockScreen/SendNotification.xaml.cs

/** 演示如何發(fā)送徽章或文本到鎖屏* * 注：* 如果需要發(fā)送文本到鎖屏，需要手動(dòng)在“設(shè)置”中將 app 添加到“選擇要顯示詳細(xì)狀態(tài)的應(yīng)用”中* * 另：* 關(guān)于 tile 和 badge 請(qǐng)參見(jiàn)：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){// 發(fā)送 badge 到鎖屏BadgeNumericNotificationContent badgeContent = new BadgeNumericNotificationContent(3);BadgeNotification badge = badgeContent.CreateNotification();BadgeUpdater badgeUpdater = BadgeUpdateManager.CreateBadgeUpdaterForApplication();badgeUpdater.Update(badge);}private void btnSendTile_Click(object sender, RoutedEventArgs e){// 發(fā)送文本到鎖屏，前提是此 app 在“選擇要顯示詳細(xì)狀態(tài)的應(yīng)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、演示如何將一個(gè) app 的多個(gè) tile 綁定到鎖屏
LockScreen/MultipleTiles.xaml

<Pagex:Class="XamlDemo.LockScreen.MultipleTiles"xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"xmlns:local="using:XamlDemo.LockScreen"xmlns:d="http://schemas.microsoft.com/expression/blend/2008"xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"mc:Ignorable="d"><Grid Background="Transparent"><StackPanel Margin="120 0 0 0"><Button Name="btnOnlyBadge" Content="只能發(fā)送 badge 的可以綁定到鎖屏的 SecondaryTile" Click="btnOnlyBadge_Click" /><Button Name="btnBadgeAndText" Content="既能發(fā)送 badge 又能發(fā)送 text 的可以綁定到鎖屏的 SecondaryTile" Margin="0 10 0 0" Click="btnBadgeAndText_Click" /></StackPanel></Grid> </Page>

LockScreen/MultipleTiles.xaml.cs

/** 演示如何將一個(gè) app 的多個(gè) tile 綁定到鎖屏* * 要想將 SecondaryTile 綁定到鎖屏，需要注意：* 1、需要設(shè)置 SecondaryTile 的 LockScreenBadgeLogo* 2、如果需要文本支持則還需要設(shè)置 SecondaryTile 的 LockScreenDisplayBadgeAndTileText 為 true* 3、需要手動(dòng)在“設(shè)置”中將 SecondaryTile 添加到鎖屏，當(dāng)然如果需要文本支持則需要手動(dòng)將 app 添加到“選擇要顯示詳細(xì)狀態(tài)的應(yīng)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();}// 僅支持 badge 的可以登錄鎖屏的 SecondaryTileprivate 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 LockScreenBadgeLogosecondTile.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錄鎖屏的 SecondaryTileprivate 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 LockScreenBadgeLogosecondTile.LockScreenBadgeLogo = new Uri("ms-appx:///Assets/BadgeLogo.png");// 需要設(shè)置 LockScreenDisplayBadgeAndTileText 為 truesecondTile.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、演示如何自定義鎖屏圖片
LockScreen/CustomLockScreenImage.xaml

<Pagex:Class="XamlDemo.LockScreen.CustomLockScreenImage"xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"xmlns:local="using:XamlDemo.LockScreen"xmlns:d="http://schemas.microsoft.com/expression/blend/2008"xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"mc:Ignorable="d"><Grid Background="Transparent"><StackPanel Margin="120 0 0 0"><Button Name="btnDemo" Content="自定義鎖屏圖片" Click="btnDemo_Click" /><Image Name="img" Width="200" Height="200" Margin="0 10 0 0" HorizontalAlignment="Left" /></StackPanel></Grid> </Page>

LockScreen/CustomLockScreenImage.xaml.cs

/** 演示如何自定義鎖屏圖片*/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){// 將指定的圖片設(shè)置為鎖屏圖片await Windows.System.UserProfile.LockScreen.SetImageFileAsync(imageFile);// 獲取當(dāng)前的鎖屏圖片IRandomAccessStream imageStream = Windows.System.UserProfile.LockScreen.GetImageStream();if (imageStream != null){BitmapImage lockScreenImage = new BitmapImage();lockScreenImage.SetSource(imageStream);img.Source = lockScreenImage;}}}}} }

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