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Windows Phone 8 : Walking Through the Bookshop Sample Application (part 2) - Displaying the Product List
The list of products exposed by the ProductsViewModel.Products property is displayed using a ListBox control in the ProductsView page.
Windows Phone 8 : Walking Through the Bookshop Sample Application (part 1)
This artcile’s sample app provides the beginnings of a simple data driven e-commerce app that demonstrates the use of navigation, transient and persistent state, image caching, and WCF services.
Windows Phone 8 : Page Navigation - Creating an Application Splash Screen
Windows Phone App projects have baked-in support for application splash screens. To create a splash screen it is simply a matter of placing a JPG image called SplashScreenImage.jpg, with the dimensions of 480 by 800 pixels, in the root directory of your project. Ensure that its Build Action is set to Content
Windows Phone 8 : Page Navigation - Page Redirection, Hardware Back Button
The OnNavigatingFrom method allows you to intercept a navigation event and to even cancel the navigation if needed. Additionally, there may be times when you want to redirect the user to a different URI based on some conditional logic.
Windows Phone 8 : Page Navigation - Canceling Navigation, Cross-Page Communication
After navigation has occurred, an opportunity remains for the previous page to interact with the current page from the previous page’s OnNavigatedFrom method. This is achieved using the Content property of the NavigationEventArgs, which provides the destination PhoneApplicationPage object.
Windows Phone 8 : Page Navigation - Navigation Using the NavigationService, Handling Page Navigation
The PhoneApplicationPage extends the System.Windows.Controls.Page class, which has a number of virtual methods called when the page is brought into view or removed from view by the PhoneApplicationFrame
Windows Phone 8 : Page Navigation - URI Mapping
Relying on URIs that include the full path to each page in your app can make your app brittle and difficult to change the physical location of individual pages. If a page is moved, all references to that file must be updated. This can lead to maintainability issues as the size of the project grows.
Windows Phone 8 : Page Navigation - Passing Page Arguments Using Query Strings
Query strings allow for key value pairs to be embedded in a URL and passed to a page. Just like HTML web applications, Windows Phone apps use query string parameters for inter-page communication.
Windows Phone 8 : Page Navigation - Navigation Using Unmapped URIs
There are numerous ways of allowing the user to perform page navigation. This section looks at using Buttons with code-beside to open external URLs, and at HyperlinkButtons, which can rely solely on XAML.
Windows Phone 8 : Understanding the Application Execution Model - Running Under the Lock Screen - Lock Screen Management
Running under the lock screen is the only way to allow your foreground app to run while the phone is idle. It should, however, be used with caution, because if an app continues to consume the device CPU, it may rapidly flatten the device battery.
Windows Phone 8 : Understanding the Application Execution Model - Implementing Fast App Resume - Optimizing the Resume Experience
Fast App Resume in your app should be implemented in a manner that ensures a predictable experience for the user. The behavior of your app when it is resumed should depend on the entry point of your app when it was initially launched from a cold start and the entry point when it was resumed.
Windows Phone 8 : Exploring the Execution Model (part 4) - Restoring Transient State, Saving Persistent State
When an app transitions from being tombstoned or dormant back to the running state, the PhoneApplicationService.Activated event is raised. This provides an opportunity to restore the transient and persistent state of the app.
Windows Phone 8 : Exploring the Execution Model (part 3) - Programmatically Exiting an App , Saving Transient State
The goal is to enable restoration of the application to its prior state before being tombstoned. It should be assumed, however, that when the Deactivated event occurs, that the application is going to be closed, moving to the closed state.
Windows Phone 8 : Exploring the Execution Model (part 2) - Life Cycle Events
The Microsoft.Phone.Shell.PhoneApplicationService exposes four life cycle related CLR events, which provide an application with the opportunity to save or load state
Windows Phone 8 : Exploring the Execution Model (part 1) - Application State
There are two types of application state: persistent and transient. Persistent state exists when an application launches. It is saved to a private storage area called isolated storage and may include data such as configurable settings or files.
Windows Phone 7 to Windows Phone 8 : App publication (part 7) - Selective targeting - Device memory
Windows Phone 7.x apps are limited to using 90 MB of memory; that is, the app is promised that it can use up to 90 MB, and that while it might sometimes get more, there is no guarantee of this.
Windows Phone 7 to Windows Phone 8 : App publication (part 6) - Selective targeting - Device capabilities
As with content and markets, you can choose to build one app for the lowest common denominator of device or multiple versions for different device configurations.
Windows Phone 7 to Windows Phone 8 : App publication (part 5) - Beta testing, Versions
Apart from fixing bugs, improving the UI, providing fresher data, and adding features, the other main reason for updating is to take advantage of new features in the latest version of the platform and SDK.
Windows Phone 7 to Windows Phone 8 : App publication (part 4) - Updates
You can update the Windows Phone Store catalog information for your app at any time. This includes the descriptions, artwork, keywords, pricing and regional availability, and so on.
Windows Phone 7 to Windows Phone 8 : App publication (part 3) - Dev Center reports
The Dev Center also provides reports on your app, including the number of downloads, payment history (for non-free applications), ratings and reviews, and crash dumps (if any).
Windows Phone 7 to Windows Phone 8 : App publication (part 2) - The publication process
During development, you typically deploy your app to developer-unlocked phones, but normal users will install your app on retail phones. There are actually two supported ways to install an app onto a retail phone (that is, a phone that has not been developer-unlocked): via the Windows Phone Store, and via a company hub app.
Windows Phone 7 to Windows Phone 8 : App publication (part 1) - Preparing for publication
Before submitting your app to the Windows Phone Store for certification and publication, you are strongly encouraged to prepare for publication by using the Store Test Kit.
Windows Phone 8 : Share Menu Extensibility (part 2) - A Simple Photo Upload Share Application
This section looks at building a photo Share application that takes an image and uploads it as a byte array to a WCF service. The example app is located in the WPUnleashed.ShareExample project in the downloadable sample code. The WCF service that the app communicates with is located in the WPUnleashed.Web project.
Windows Phone 8 : Share Menu Extensibility (part 1) - Adding Your App to the Share Menu
To extend the share menu to include your photo share application, create a new file called E0F0E49A-3EB1-4970-B780-45DA41EC7C28.xml in the root directory of your main project. Rather than typing the name by hand, you may prefer to copy the XML file to your project from the downloadable sample code.
Windows Phone 8 : Creating a Photos Extras Application (part 3) - Saving the Image
The MediaLibrary.SavePicture method requires that the specified image name is not null or an empty string. The SavePicture method has two overloads; one accepts a Stream of image bytes, the other a byte array representing the image. Both save the image to the Saved Pictures album in the Pictures Hub.
Windows Phone 8 : Creating a Photos Extras Application (part 2) - An Edge-Tracing Extras Application
This section looks at building an Extras application that converts an image to a line drawing by tracing its edges, and then allows the user to save the image to the Saved Pictures folder in the Pictures Hub. The example app for this section is located in the WPUnleashed.ExtrasExample project in the downloadable sample code.
Windows Phone 8 : Creating a Photos Extras Application (part 1) - Adding Your App to the Extras Menu
To indicate to the Windows Phone picture viewer that your app should be included in the Extras menu, the inclusion of an XML file called Extras.xml is required in the root of your XAP file.
Java ME Subsystem Architecture : Mean and Lean Virtual Machine
When referring to the VM, the referral is always to the headless language and core classes engine only (i.e., no UI). The majority of shipped devices include a port of Sun's CLDC-HI HotSpot VM 1.1 implementation (which implements v1.1 of the CLDC specification).
Java ME Subsystem Architecture : Application Management Software, MIDP Push
Application Management Software (AMS) is a generic term used by the MIDP specification to describe the software component that manages the downloading and lifecycle of MIDlets and listens for inbound notification requests on connections that are registered in the Push Registry.
Java ME Subsystem Architecture : Java Applications and Symbian OS
From the point of view of the Symbian OS architecture, the Java ME subsystem is a replaceable component that Symbian OS licensees can extend, customize or replace altogether.
 
 
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