The Device.Screen object gives you access to all information and functionality of the screen.

To get the current device's width and height you can use:

var width = View.Root.ActualWidth;
var height = View.Root.ActualHeight;

Note: On devices which have a logical buttons bar such as some Windows Phones, the above will give you only the usable size of the device as opposed to the hardware size.

App orientation

In general you may want your app to be:

• Always portrait (e.g.: Facebook app)
• Always landscape (e.g.: some games)
• Support either (e.g. Safari)

The default Zebble project template is configured to support both. But you can also change it to support only portrait or only landscape.

Configuring supported orientations

The following shows the configurations necessary for dynamic orientation (supporting both).

• Android: In MainActivity.cs file's Activity attribute:
  • set ScreenOrientation to Unspecified.
  • Set ConfigurationChanges to ConfigChanges.Orientation | ConfigChanges.ScreenSize
• iOS: In info.plist, set: 

    <key>UISupportedInterfaceOrientations</key>
     <array>
          <string>UIInterfaceOrientationPortrait</string>
          <string>UIInterfaceOrientationLandscapeLeft</string>
          <string>UIInterfaceOrientationLandscapeRight</string>
     </array>

• UWP: In package.appxmanifest set 

        <uap:InitialRotationPreference>
            <uap:Rotation Preference="portrait" />
            <uap:Rotation Preference="landscape" />
            <uap:Rotation Preference="landscapeFlipped" />
       </uap:InitialRotationPreference>

Finding current orientation

If you app supports both portrait and landscape orientation, you can find the current orientation of the device for processing in your app using:

if (Device.Screen.Orientation == DeviceOrientation.Portrate)
{
     // ...
}
else
{
    // Landscape logic...
}You can also attach an event handler to detect changes in device orientation:

...
{
     Device.Screen.OrientationChanged.Handle(OnOrientationChanged);
}

public Task OnOrientationChanged()
{
      var newOrientation = Device.Screen.Orientation;
      // ...
}