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3Apr/150

New API in Windows Phone 8.1 Update 2

Windows Phone 8.1 Update 2 v 8.10.15127 finally arrived as the default OS version on new Microsoft Lumia 640 and 640 XL, and again, there is a new hidden API in it, so let's take a look, if there is anything interesting that we, developers, can use in our apps.

tl;dr The API diff between WP8.1 Update 1 and WP8.1 Update 2 is here on GitHub. Only added/updated Windows.Phone.Notification.Management API - nothing we can use in our apps without special Accessory extension SDK, + new property in PhoneApplicationPage,

29Mar/150

How to fix missing Extension SDKs in Windows 10 Universal Apps

When tools for developing Windows 10 Universal Apps were released couple of days ago I started porting one of my apps to find out, what are the changes and possible issues.
First issue I ran into was that I was unable to add Behaviors SDK to my project - the list of Extension SDKs was almost empty:

In Windows/Phone 8.1 project:

sdk.8.1

In Windows 10 UAP project:

sdk.10

Luckily, there is a workaround, according to Release Notes for the first version of Windows 10 Tools it's necessary to copy the extension SDKs from the Windows 8.1 Extension SDK location to the universal apps location—that is:

From:
C:\Program Files (x86)\Microsoft SDKs\Windows\v8.1\ExtensionSDKs
To:
C:\Program Files (x86)\Microsoft SDKs\UAP\v0.8.0.0\ExtensionSDKs

After restarting Visual Studio 2015 the copied SDKs are then available in the list and you can add it just like before. Done.

22Mar/150

#WPdev Quick tip – API for accessing Windows Store from your app

Following the previous WPdev quick tip how to initiate Email Compose from your app, here is another API that developer often need:

  • Navigate to Rate and Review dialog for the current app - if you want to initiate app rating from the current user
  • Navigate to Windows/Phone Store to the currently running app - if you want the user to purchase full version of current app or upgrade to a new version
  • Navigate to Windows/Phone Store to all apps published by the current developer - if you want to encourage the user to download other of your apps

Unfortunately all these tasks require different type of API in Windows Phone 7.5/8/8.1 Silverlight apps, in Windows 8.1 apps and another one in Windows Phone 8.1 WinRT apps and since I needed all these methods in my recent Windows Universal App NASA TV Live, I decided to put it all into short article for future use, so here it is:

10Mar/150

#WPdev Quick tip – API for sending emails from your app

When developing Windows Phone or Windows Store app it's often useful to give your user option to send you feedback email or feature request. In this short #WPdev article I'll cover all three different approaches you could use in all current Windows Store platforms.

Windows Phone 7, 7.5, 8 and 8.1 (Silverlight)

Sending emails from original Windows Phone 7+ Silverlight apps is done using the EmailComposeTask:

string to = "my@email.cz";
string subject = "Idea for your app";
string body = "Hi, here's an idea for your cool app...";
EmailComposeTask emailTask = new EmailComposeTask
{
 To = to, Subject = subject, Body = body,
 //Cc = , Bcc = , CodePage = ,
};
emailTask.Show();

When the Show method is called the system dialog appears where you can choose the mail account that will be used for sending the email.

As you can see the usage is really simple, one class and one method is all you need. Note there is no way how to send emails with attachments using this API.
Another problem also is that this API is no longer available when developing Windows 8/8.1 or Windows Phone 8.1 WinRT apps. So what is the alternative?

17Oct/149

How to deploy your own NuGet server on Azure Website in 15 minutes

Let's imagine this typical scenario: You are an indie developer or a company developing apps in Visual Studio. You have already developed and use several own useful libraries across various projects. Right now you are maintaining each of these libraries in separate Git/TFS repository and adding these libraries as submodules to your projects. Because these libraries are hierarchically dependent one on another, it's quite hard to maintain the dependencies and changes properly. You've thought about packaging these libraries as separate NuGet packages, but adding them to public nuget.org gallery is not an option since these libraries contain private knowhow.

In this article I'll demonstrate, how to deploy your own NuGet Server on free instance of Azure Website, secure it with Basic HTTP Authentication, setup this new server so it can be used from Visual Studio, easily create automatic PowerShell scripts for deploying these libraries as NuGet packages to your server, use these NuGet packages in your projects and also how to achieve all this in just couple of minutes!

21Aug/140

New API in Windows Phone 8.1 Update 1

Accessory-App-Windows-Phone-348x620As a part of the "Preview for Developers" program Microsoft just recently released the first larger update for Windows Phone 8.1 called just "Windows Phone 8.1 Update" with OS version number 8.10.14147.180. The original Windows Phone 8.1 was 8.10.12359.845.

According to MSDN blog article this update brings primarily these new end user features:

  • Cortana is now available for couple of new countries
  • Live Folders - native implementation of app folders on the Start screen
  • Option to simply select multiple SMS messages for deleting/forwarding
  • Apps Corner, Private VPN, Store Live Tile, Internet sharing via Bluetooth, customizable snooze time for Alarms and more.

But probably the most interesting feature, that might be part of this update as well, is is the support for notification on accessories, typically on smart watches and other wearables. The best hint for this functionality is already in the phone settings - the new "accessory apps" section.

The second hint is the new available API, that'll be shown in the rest of this article.

27Jul/144

File IO Best Practices in Windows and Phone apps – Part 1. Available APIs and File.Exists checking

Working with files is one of the most common tasks when developing any Windows Phone or Windows apps. In this mini-series of articles I'll show you available APIs in all Windows Phone and Windows versions, caveats when doing task such as checking if specific file exists, getting target file, reading writing data from/to files and also how to effectively extract data from ZIP files, and more.

In the first part of this series I'll discuss available File IO APIs in Windows Phone 8, 8.1 Silverlight, 8.1 XAML, Windows 8 and 8.1 platforms and benchmark all available methods for testing, if target file in Local Folder exists, or not. To my great surprise, the performance of methods in StorageFolder API is dramatically different across different platforms and it's not a good idea to use single approach everywhere.

11Jun/140

Xbox 360 Controller API for Windows Store apps

In Windows Store apps for Windows 8.1 there are four basic input methods - touch, mouse, stylus and keyboard. In most of scenarios these input methods are all you need, but in case you want to offer more natural experience for controlling games on Windows 8.1, you can also add support for Xbox 360 and Xbox One controllers.

In this dev article I'll show you, how to use in any C#/XAML app or game for Windows 8.1 the Xbox 360 Controller API, how to detect presence of such controller and how to poll for current state of all buttons.

25Mar/140

Using Json Design-time data in Windows Phone 8 apps

In my previous article I've shown a new way, how can we use Json file as a data source for design-time data in new Windows 8.1 apps. Luckily, it's possible to use similar approach in Windows Phone 8 apps as well!

15Mar/141

Using Json Design-time data in Windows Store apps

When designing Windows 8.1 apps it's essential to have design-time data available in some way, so we can actually see how the app will look like.

Iris Class described in this great article, that there are several ways, how to achieve this:

  • Using XAML – Design time data source set in XAML
  • Using a ‘standalone’ data source class – Design time data source set in XAML
  • Conditional data source – Design time data source set in code

But what I missed in this aticle is probably the most interesting way, how to use design-time data in Windows 8 apps - using external Json files. Here's a short guide, how to do it: