How to know 720p or 1080p on windows phone 8? - windows-phone-8

Question

Usually, I used Application.Current.Host.Content.ScaleFactor to checking my device's resolution, but now the value is the same for 720p and 1080p.
So then what differentiates them ? Thank you !

Answer 1

Here is a code snippet that gives the correct scale factor, even for 1080p devices:
public int ScaleFactor
{
get
{
object physicalScreenResolutionObject;
if (DeviceExtendedProperties.TryGetValue("PhysicalScreenResolution", out physicalScreenResolutionObject))
{
var physicalScreenResolution = (Size)physicalScreenResolutionObject;
return (int)(physicalScreenResolution.Width / 4.8);
}
return Application.Current.Host.Content.ScaleFactor;
}
}
Here are the corresponding resolutions for each scale factor values:
100 => WVGA (480*800)
150 => 720p (720*1280)
160 => WXGA (768*1280)
225 => 1080p (1080*1980)
Source: Handle 1080p in Windows Phone like a Pro!

Answer 2

follow the guidance as detailed in this post
http://blogs.windows.com/windows_phone/b/wpdev/archive/2013/11/22/taking-advantage-of-large-screen-windows-phones.aspx

Answer 3

Here is something from the Nokia Developer blog.
public static Size DisplayResolution
{
get
{
if (Environment.OSVersion.Version.Major<8)
return new Size(480,800);
int scaleFactor=(int) GetProperty(System.Windows.Application.Current.Host.Content, "ScaleFactor");
switch (scaleFactor)
{
case 100:
return new Size(480, 800);
case 150:
return new Size(720, 1280);
case 160:
return new Size(768, 1280);
}
return new Size(480, 800);
}
}
private static object GetProperty(object instance, string name)
{
var getMethod= instance.GetType().GetProperty(name).GetGetMethod();
return getMethod.Invoke(instance, null);
}
Hope this helps!

Answer 4

XamlEssentials is a neat set of helpers for building XAML-based applications. Recently, it added some helper utilities to make it easy to deal with large-resolution screens.
The static property DisplayHelper.CurrentResolution returns an enum letting you know if the resolution is DisplayResolutions.WVGA, DisplayResolutions.WXGA, DisplayResolutions.HD720p, or DisplayResolutions.HD1080p.
The static property DisplayHelper.IsPhablet helps to determine if the screen size is greater than 5", which lets you render differently even if you're on a 6" 720p screen, like the Lumia 1320.
The static method ResourceHelper.AddPhabletStyle() lets you add a specific ResourceDictionary only if the screen is greater than 5 inches, so you can easily change the layout of a page depending on the size of the screen.
XamlEssentials also has other helpers that make dealing with the new additions to GDR3 easier. You can read more about those helpers here.
You can easily add XamlEssentials to your project from NuGet, or you can download the source from GitHub.
HTH!