/// <summary>
/// Re-establishes the communication channel with underlying sensor, if it doesn't
/// already exist. Connection needs to be re-established when the application
/// is brought to foreground.
/// </summary>
/// <returns>Returns an IAsyncAction object that is used to control the asynchronous operation.</returns>
public async Task ActivateAsync()
{
if (_aMonitor != null)
{
await _aMonitor.ActivateAsync();
}
if (_sCounter != null)
{
await _sCounter.ActivateAsync();
}
if (_rTracker != null)
{
await _rTracker.ActivateAsync();
}
if (_pMonitor != null)
{
await _pMonitor.ActivateAsync();
}
}
/// <summary>
/// constructor
/// </summary>
public MainPage()
{
this.InitializeComponent();
this.NavigationCacheMode = NavigationCacheMode.Required;
Window.Current.VisibilityChanged += async(oo, ee) =>
{
if (!ee.Visible && _trackMonitor != null)
{
await CallSenseApiAsync(async() =>
{
await _trackMonitor.DeactivateAsync();
});
}
else if (_trackMonitor != null)
{
await CallSenseApiAsync(async() =>
{
await _trackMonitor.ActivateAsync();
});
UpdateScreenAsync();
}
};
}
