/// <summary>
/// SensorCore needs to be activated when app comes back to foreground
/// </summary>
public async Task ActivateAsync()
{
if (_sensorActive)
{
return;
}
if (_stepCounter != null)
{
await _stepCounter.ActivateAsync();
}
else
{
await InitializeAsync();
}
_sensorActive = true;
}
private async Task InitializeSensorAsync()
{
Exception failure = null;
if (!await StepCounter.IsSupportedAsync())
{
MessageBox.Show(
"Your device doesn't support Motion Data. Application will be closed",
"Information", MessageBoxButton.OK);
Application.Current.Terminate();
}
try
{
_stepCounter = await StepCounter.GetDefaultAsync();
}
catch (Exception e)
{
failure = e;
}
if (failure != null)
{
switch (SenseHelper.GetSenseError(failure.HResult))
{
case SenseError.LocationDisabled:
case SenseError.SenseDisabled:
NavigationService.Navigate(new Uri("/ActivateSensorCore;component/Pages/ActivateSensorCore.xaml", UriKind.Relative));
break;
default:
throw (failure);
}
}
else
{
await _stepCounter.ActivateAsync();
await UpdateModelAsync();
}
}
public MainPage()
{
this.InitializeComponent();
this.NavigationCacheMode = NavigationCacheMode.Required;
Window.Current.VisibilityChanged += async(oo, ee) =>
{
if (ee.Visible)
{
if (await CallSensorcoreApiAsync(async() =>
{
if (_stepCounter == null)
{
// Get sensor instance if needed...
_stepCounter = await StepCounter.GetDefaultAsync();
}
else
{
// ... otherwise just activate it
await _stepCounter.ActivateAsync();
}
}))
{
// Display current reading whenever application is brought to foreground
await ShowCurrentReading();
}
}
else
{
// Sensor needs to be deactivated when application is put to background
if (_stepCounter != null)
{
await CallSensorcoreApiAsync(async() => await _stepCounter.DeactivateAsync());
}
}
};
}
private async Task InitializeSensorAsync()
{
Exception failure = null;
if (!await StepCounter.IsSupportedAsync())
{
MessageBox.Show(
"Your device doesn't support Motion Data. Application will be closed",
"Information", MessageBoxButton.OK);
Application.Current.Terminate();
}
try
{
_stepCounter = await StepCounter.GetDefaultAsync();
}
catch (Exception e)
{
failure = e;
}
if (failure != null)
{
switch (SenseHelper.GetSenseError(failure.HResult))
{
case SenseError.LocationDisabled:
case SenseError.SenseDisabled:
NavigationService.Navigate(new Uri("/ActivateSensorCore;component/Pages/ActivateSensorCore.xaml", UriKind.Relative));
break;
default:
throw (failure);
}
}
else
{
await _stepCounter.ActivateAsync();
await UpdateModelAsync();
}
}