public static void OnOrientationChange(DeviceViewOrientation currentOrientation, bool?likelyPortrait = null, bool forceNotification = false)
{
//If the orientation is Unknown, then we want to try and call DeviceViewOrientationChecker to get it
if (currentOrientation == DeviceViewOrientation.Unknown)
{
currentOrientation = DeviceViewOrientationChecker?.Invoke() ?? currentOrientation;
}
//If it is still unknown, then we will try to infer it from likelyPortrait and the lastKnownOrientation
if (currentOrientation == DeviceViewOrientation.Unknown && likelyPortrait != null)
{
if (likelyPortrait.Value)
{
currentOrientation =
(lastKnownOrientation == DeviceViewOrientation.PortraitNormal ||
lastKnownOrientation == DeviceViewOrientation.PortraitUpsideDown)
? lastKnownOrientation
: DeviceViewOrientation.PortraitNormal;
}
else
{
currentOrientation =
(lastKnownOrientation == DeviceViewOrientation.LandscapeLeft ||
lastKnownOrientation == DeviceViewOrientation.LandscapeRight)
? lastKnownOrientation
: DeviceViewOrientation.LandscapeLeft;
}
}
lock (orientationLocker)
{
if (currentOrientation != DeviceViewOrientation.Unknown && lastKnownOrientation != currentOrientation)
{
previousOrientation = lastKnownOrientation;
lastKnownOrientation = currentOrientation;
foreach (IOrientationAware item in orientationAwareObjects)
{
item.OnDeviceOrientationChanged();
}
}
else if (forceNotification)
{
foreach (IOrientationAware item in orientationAwareObjects)
{
item.OnDeviceOrientationChanged();
}
}
}
}
public static void Initialize(AndroidPlatformConfigBase platformConfig)
{
_platformConfig = platformConfig ?? throw new ArgumentNullException(nameof(platformConfig));
SubscribeToPageScreenSizeNotifications();
try
{
_orientationListener = new OrientationListener(platformConfig.MainActivityContext, SensorDelay.Normal);
if (!_orientationListener.TryEnabling())
{
_orientationListener = null;
}
}
catch (Exception)
{
_orientationListener = null;
}
if (_orientationListener?.Enabled ?? false)
{
CodeBrixViewModelBase.DeviceViewOrientationChecker = () =>
{
DeviceViewOrientation orientation = DeviceViewOrientation.Unknown;
if (_orientationListener.Enabled && _orientationListener.FirstOrientationSet)
{
int rotation = _orientationListener.Orientation;
switch (rotation)
{
case 0:
orientation = DeviceViewOrientation.PortraitNormal;
break;
case 90:
orientation = DeviceViewOrientation.LandscapeRight;
break;
case 180:
orientation = DeviceViewOrientation.PortraitUpsideDown;
break;
case 270:
orientation = DeviceViewOrientation.LandscapeLeft;
break;
default:
break;
}
}
if (orientation == DeviceViewOrientation.Unknown)
{
orientation = (_lastKnownOrientation == Orientation.Landscape)
? DeviceViewOrientation.LandscapeLeft
: DeviceViewOrientation.PortraitNormal;
}
return(orientation);
};
}
SetDeviceOrientation(_platformConfig.Resources.Configuration.Orientation);
_initialized = true;
}
