/// <summary>
/// SensorCore needs to be deactivated when app goes to background
/// </summary>
public async Task DeactivateAsync()
{
_sensorActive = false;
if (_stepCounter != null)
{
await _stepCounter.DeactivateAsync();
}
}
protected override async void OnNavigatingFrom(NavigatingCancelEventArgs e)
{
if (_pollTimer != null)
{
_pollTimer.Stop();
}
if (_stepCounter != null)
{
await _stepCounter.DeactivateAsync();
}
}
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());
}
}
};
}