Windows Phone 8.1 开发会用到的方法
转自http://www.bcmeng.com/jiqiao/
1. 屏幕方向控制
DisplayOrientations onEntryOrientations; protected override void OnNavigatedTo(NavigationEventArgs e) { onEntryOrientations = DisplayInformation.AutoRotationPreferences; Windows.Graphics.Display.DisplayInformation.AutoRotationPreferences = Windows.Graphics.Display.DisplayOrientations.Portrait; } protected override void OnNavigatedFrom(NavigationEventArgs e) { Windows.Graphics.Display.DisplayInformation.AutoRotationPreferences = onEntryOrientations; }
2. 重写Back Key
using Windows.Phone.UI.Input
...
protected override void OnNavigatedTo(NavigationEventArgs e)
{
//This should be written here rather than the contructor
HardwareButtons.BackPressed += HardwareButtons_BackPressed;
}
void HardwareButtons_BackPressed(object sender, BackPressedEventArgs e)
{
//This is where all your 'override backkey' code goes
//You can put message dialog and/or cancel the back key using e.Handled = true;
/*Frame frame = Window.Current.Content as Frame;
if (frame == null)
return;
if (frame.CanGoBack)
{
frame.GoBack();
e.Handled = true;
}*/
}
protected override void OnNavigatingFrom(NavigatingCancelEventArgs e)
{
//remove the handler before you leave!
HardwareButtons.BackPressed -= HardwareButtons_BackPressed;
}
3. 退出应用程序
Application.Current. Exit();
4. 显示/隐藏状态栏Status Bar
Windows.UI.ViewManagement.StatusBar.GetForCurrentView().ShowAsync();
Windows.UI.ViewManagement.StatusBar.GetForCurrentView().HideAsync();
5. 隐藏命令栏CommandBar（没有成功，CommandBar没有Visibility属性，待继续试）
CommandBar.Visibility = Windows.UI.Xaml.Visibility.Collapsed;
6. 状态栏显示进度条
Windows.UI.ViewManagement.StatusBar.GetForCurrentView().ShowAsync(); var progInd = Windows.UI.ViewManagement.StatusBar.GetForCurrentView().ProgressIndicator; progInd.Text = "Fetching..."; progInd.ShowAsync();
7. 跳转各个开关设置页面
// 跳转到“蓝牙设置”页 bool success = await Launcher.LaunchUriAsync(new Uri("ms-settings-bluetooth:")); // 跳转到“手机网络设置”页 bool success = await Launcher.LaunchUriAsync(new Uri("ms-settings-cellular:")); // 跳转到“WiFi设置”页 bool success = await Launcher.LaunchUriAsync(new Uri("ms-settings-wifi:")); // 跳转到“定位设置”页 bool success = await Launcher.LaunchUriAsync(new Uri("ms-settings-location:")); // 跳转到“电子邮件+账户设置”页 bool success = await Launcher.LaunchUriAsync(new Uri("ms-settings-emailandaccounts:")); // 跳转到“锁屏设置”页 bool success = await Launcher.LaunchUriAsync(new Uri("ms-settings-lock:")); //屏幕旋转 var success = await Windows.System.Launcher.LaunchUriAsync(new Uri("ms-settings-screenrotation:")); // 拨打指定的电话号码 bool success = await Launcher.LaunchUriAsync(new Uri("tel:1391234567")); bool success = await Launcher.LaunchUriAsync(new Uri("callto:1391234567")); // 用浏览器打开一个指定的 http 链接 bool success = await Launcher.LaunchUriAsync(new Uri("http://webabcd.cnblogs.com/")); // 向指定的地址发送邮件 bool success = await Launcher.LaunchUriAsync(new Uri("mailto:aaa@xxx.com"));
8. App Bar浮出
<Page.BottomAppBar>
<CommandBar>
<AppBarButton Icon="List" Label="ingredients">
<AppBarButton.Flyout>
<Flyout>
<Grid Height="400">
<ListBox x:Name="IngredientsListBox" />
</Grid>
</Flyout>
</AppBarButton.Flyout>
</AppBarButton>
</CommandBar>
</Page.BottomAppBar>
List<string> ingredients = new List<string> {
"Shortcrust Pastry: ","220g plain flour","120g cold butter",
"1 tablespoon very cold water","1 large egg",
"separated into yolk and white","Filling: ","1 teaspoon oil",
"1 small onion","220g bacon","finely chopped 5 large eggs",
"125ml cream","1/4 teaspoon ground nutmeg Salt and pepper",
"110g grated tasty cheddar cheese"
};
IngredientsListBox.ItemsSource = ingredients;
9. 页面间导航动画
<Page …> <Grid Background="{ThemeResource ApplicationPageBackgroundThemeBrush}"> <Grid.ChildrenTransitions> <TransitionCollection> <EntranceThemeTransition/> </TransitionCollection> </Grid.ChildrenTransitions> <Grid.RowDefinitions> <RowDefinition Height="140"/> <RowDefinition Height="*"/> </Grid.RowDefinitions> … </Grid> </Page>
10. 语音识别API
if (jaRecognizers.Count() > 0)
{
//指定识别器
speechRecognizerUI.Recognizer.SetRecognizer(jaRecognizers.First());
//听写整句，基于网络识别
speechRecognizerUI.Recognizer.Grammars.AddGrammarFromPredefinedType("webSearch", SpeechPredefinedGrammar.WebSearch);
//预加载全部语法
await speechRecognizerUI.Recognizer.PreloadGrammarsAsync();
// 带 UI 的语音识别器的监听页上显示的标题
speechRecognizerUI.Settings.ListenText = "正在聆听…";
// 带 UI 的语音识别器的监听页上显示的示例文本
speechRecognizerUI.Settings.ExampleText = "语音转文字";
// 是否用语音朗读识别结果
speechRecognizerUI.Settings.ReadoutEnabled = true;
speechRecognizerUI.Settings.ShowConfirmation = true;
try
{
// 开始识别
SpeechRecognitionUIResult result = await speechRecognizerUI.RecognizeWithUIAsync();
ContentBox.Text += result.RecognitionResult.Text;
}
catch
{
//错误处理
}
}
11. 获得证书凭证
void SaveCredential(string username, string password) { PasswordVault vault = new PasswordVault(); PasswordCredential cred = new PasswordCredential(“MyAppResource”, username, password); vault.Add(cred); } IReadOnlyList<PasswordCredential> RetrieveCredential(string resource) { PasswordVault vault = new PasswordVault(); return vault.FindAllByResource(resource); }
12. 检查网络状态
bool CheckNetwork()
{
bool isOnline = false;
ConnectionProfile InternetConnectionProfile = NetworkInformation.GetInternetConnectionProfile();
if (InternetConnectionProfile==null)
{
txtMag.Text = "亲：断网情况下无法显示词典内容！";
}
else
{
isOnline = true;
}
return isOnline;
}
13. ListView和GridView多选和拖动
MyListView.ReorderMode = ListViewReorderMode.Enabled;
MyListView.SelectionMode = ListViewSelectionMode.Multiple;
