The Featured Discussion Board Post this week is Multiple camera streaming ?, by Loukt. Loukt will be sent a brand new Lumia 620 for his question!
The post asked how to create a multiple filtered real time camera stream – ie displaying the feed from the camera twice, with different filters applied to each stream. Loukt was trying to use multiple
mediaelement‘s to get the needed output, but that resulted in only one of the outputs being rendered.
Yan_ came up with the solution that is to share a bitmap image source and fork it to different pipelines for processing. He also included an example project. The discussion continues around further optimising the solution!
This is a pretty cool idea, and one that can have many use cases in imaging apps.
You too could win a Lumia 620 if your post is featured in the next week! Keep those interesting questions coming!
DVLUP provides two types of awards: “Experience Points” (XP), which affect the ranking of a developer on the leader boards, and “Points” which can be redeemed for great rewards (including devices, access to free or reduced cost tools, etc.).
From this week onwards, Nokia Developer contributors that win the following community promotions will get DVLUP XP/points to reflect their expertise and contribution to the community:
We’re really pleased to be able to tangibly acknowledge community contributions on DVLUP. Wiki and discussion board contributors do more than just create their own great apps, but also help others to excel by providing great technical resources and answers to their technical questions. The level of XP/points has been selected to reflect the expertise required to win, and the generosity of the winner in sharing their knowledge with the community.
*COM and POM winners usually get sent a high-end Lumia device. In future and in some circumstances this may be replaced by the equivalent in DVLUP points where appropriate, and at the discretion of Nokia Developer Community management.
Note the following caveats:
- All prizing is at the discretion of Nokia Developer community management, and may be removed or changed at any time.
- The winner must have a valid DVLUP account in order to be awarded the XP/points.
- We will not “hold” points for people for more than a week or “backdate” points for previous winners
- Prizes will only be awarded to active members of the Nokia Developer community (this is relevant if an older article is featured, and the author is no longer contributing).
Adding a new calendar event in Java ME by dekudin
This code example demonstrates how to use the Java ME PIM API to add calendar event to the list of events. This was selected because it also shows how to set the calendar repeat and how to use this to play the alarm sound (which was not formerly documented!)
See Featured Articles for other great articles from the community.
Data validation using Fluent Validation in Windows Phone by NicoVermeir
Data validation is required almost everywhere an app takes data input. There are many approaches for Sliverlight/WPF and most of them will also work in Windows Phone.
The code example in the article explains how to use the Fluent Validation library (available on Nuget), which describes itself as “a small validation library for .NET that uses a fluent interface and lambda expressions for building validation rules for your business objects”. The library is simple to use and makes it very easy to define complex but readable validation rules.
This article explains how to validate data in Windows Phone 8 using the Fluent Validation library.
See Featured Articles for other great articles from the community.
The Featured Discussion Board Post this week is Image Slideshow control for Windows Phone apps using C# and XAML, by jj2001. jj2001 will be sent a brand new Lumia 620 for his question!
The post started with the need to create a image slideshow effect on a Windows Phone app, and the author running into difficulty when creating it. The advice from the community ended up being to check out some existing solutions – as the Windows Phone ecosystem matures there is (increasingly) a really good chance that someone already implemented solutions to common problems.
A few suggestions were made, including to use an open source library like Kinnara/WPToolkit. Unless you want something very specific, or you are looking for a different way to do a certain thing, consider exploring the options, paid or free. There are quite a few open source projects, free components and also paid ones, that can dramatically increase your productivity.
You can see some here at our wiki on the Toolkits and Libraries for Windows Phone article.
You too could win a Lumia 620 if your post is featured in the next two weeks! Keep those interesting questions coming!
This week’s featured article in the Nokia Asha category is JSR 172: XML Parsing Example by grahamhughes.
This article is the basis of many Java ME apps that use XML data from REST APIs. A very simple, yet useful article by Graham, shows how to handle XML documents – parsing the XML document asynchronously and writing data classes for holding this data.
Read this article and let us know your comments.
This week’s featured article in the Windows Phone category is How to create a toggle image on Windows Phone by Depechie.
This article shows how to create a page containing both text and an image such that the page opens with the image only partially visible – in order to draw attention to the text. The image can be expanded and collapsed when tapped by the user. This is accomplished using visual states and a nice animation.
The code for the example is available for download in the article, and you can see the animation in action here.
Read the article and implement the toggle image animation in your Windows Phone apps.
Hola a todos! El pasado Miércoles 4 tuve el placer de poder participar en las Christmas Windows Phone Sessions con un webcast sobre desarrollo con el patrón MVVM en Windows Phone 8, aunque los conceptos que vimos son universales para cualquier framework o versión de XAML y C#: WPF, Silverlight, Windows Phone, Windows Store…. ¿Algún día podremos sumar XBox a esta lista?. Muchos me pedisteis los materiales, y si podría añadir comentarios algo más extensos sobre el código. Dicho y hecho! He modificado…(read more)
If you were at the London leg of #WinPhoneWeek or the last WPUG meeting you’d would have seen me show an example of a very basic app, talk about why it wasn’t as good as it could be and then show some examples of how and why it could be made better.
I’ve now written a detailed overview of what I talked about and released the two sample apps to the store.
You can read it on the new Microsoft UK Developer site.
And you can find the apps in the store:
At NDC London this week, as part of the community area, WPUG ran a Windows Phone related quiz.
While you can’t win “fabulous” prizes for taking part, you may be curious to see the questions and work out how you would have done if you’d been there.
You’ll find the questions at http://wpug.net/2013/12/05/ndc-london-wpdev-quiz-questions/
Then, once you have your answers you can check them at http://wpug.net/2013/12/06/ndc-london-wpdev-quiz-answers/