public bool RequestMotionPermission()
{
PermissionAuthorization status = CheckMotionPermission();
if (status == PermissionAuthorization.NotDetermined)
{
// There is no RequestPermission for CMMotionActivityManager. So we'll just start and stop recording.
_activityManager.QueryActivity(NSDate.Now, NSDate.Now, NSOperationQueue.MainQueue, (activities, error) => { });
}
else if (status == PermissionAuthorization.Denied || status == PermissionAuthorization.Restricted)
{
Device.OpenUri(new NSUrl("app-settings:"));
}
return(true);
}
public void QueryForRecentActivityData(Action completionHandler)
{
var now = NSDate.Now;
var dateComponents = new NSDateComponents();
dateComponents.SetValueForComponent(-7, NSCalendarUnit.Day);
var startDay = NSCalendar.CurrentCalendar.DateByAddingComponents(dateComponents, now, NSCalendarOptions.None);
activityManager.QueryActivity(startDay, now, MotionQueue, (activities, error) => {
if (activities != null)
{
CreateActivityDataWithActivities(activities, completionHandler);
}
else if (error != null)
{
HandleError(error);
}
});
}
protected override IEnumerable <Datum> Poll(CancellationToken cancellationToken)
{
List <Datum> data = new List <Datum>();
// if this is the first poll (no existing query start time), set the query start time to the current time. we
// used to set this to the maximally previous time per ios documentation (7 days), but this (1) causes issues
// when triggering surveys on the basis of these activities (there might be hundreds of activities within the
// past 7 days), and it also runs counter to the user's expectations that data will only be collected from the
// time at which they have enrolled in the study and not from times prior.
if (_queryStartTime == null)
{
_queryStartTime = DateTimeOffset.UtcNow;
}
ManualResetEvent queryWait = new ManualResetEvent(false);
SensusContext.Current.MainThreadSynchronizer.ExecuteThreadSafe(() =>
{
try
{
CMMotionActivityManager activityManager = new CMMotionActivityManager();
activityManager.QueryActivity(_queryStartTime.Value.UtcDateTime.ToNSDate(), NSDate.Now, NSOperationQueue.CurrentQueue, (activities, error) =>
{
try
{
if (error == null)
{
// process each activity, keeping track of most recent
NSDate mostRecentActivityStartTime = null;
foreach (CMMotionActivity activity in activities)
{
DateTimeOffset timestamp = new DateTimeOffset(activity.StartDate.ToDateTime(), TimeSpan.Zero);
#region get confidence
double confidence = 0;
if (activity.Confidence == CMMotionActivityConfidence.Low)
{
confidence = 0.1;
}
else if (activity.Confidence == CMMotionActivityConfidence.Medium)
{
confidence = 0.5;
}
else if (activity.Confidence == CMMotionActivityConfidence.High)
{
confidence = 1;
}
else
{
SensusException.Report("Unrecognized confidence: " + activity.Confidence);
}
#endregion
#region get activities
Action <Activities> AddActivityDatum = activityType =>
{
ActivityDatum activityDatum = new ActivityDatum(timestamp, activityType, ActivityPhase.Starting, ActivityState.Active, confidence);
data.Add(activityDatum);
};
if (activity.Stationary)
{
AddActivityDatum(Activities.Still);
}
if (activity.Walking)
{
AddActivityDatum(Activities.Walking);
}
if (activity.Running)
{
AddActivityDatum(Activities.Running);
}
if (activity.Automotive)
{
AddActivityDatum(Activities.InVehicle);
}
if (activity.Cycling)
{
AddActivityDatum(Activities.OnBicycle);
}
if (activity.Unknown)
{
AddActivityDatum(Activities.Unknown);
}
#endregion
if (mostRecentActivityStartTime == null)
{
mostRecentActivityStartTime = activity.StartDate;
}
else
{
mostRecentActivityStartTime = mostRecentActivityStartTime.LaterDate(activity.StartDate);
}
}
// set the next query start time one second after the most recent activity's start time
if (mostRecentActivityStartTime != null)
{
_queryStartTime = new DateTime(mostRecentActivityStartTime.ToDateTime().Ticks, DateTimeKind.Utc).AddSeconds(1);
}
}
else
{
throw new Exception("Error while querying activities: " + error);
}
}
catch (Exception ex)
{
SensusServiceHelper.Get().Logger.Log("Exception while querying activities: " + ex, LoggingLevel.Normal, GetType());
}
finally
{
queryWait.Set();
}
});
}
catch (Exception ex)
{
SensusServiceHelper.Get().Logger.Log("Exception while querying activities: " + ex, LoggingLevel.Normal, GetType());
queryWait.Set();
}
});
WaitHandle.WaitAny(new[] { queryWait, cancellationToken.WaitHandle });
return(data);
}
protected override IEnumerable <Datum> Poll(CancellationToken cancellationToken)
{
List <Datum> data = new List <Datum>();
if (_queryStartTime == null)
{
_queryStartTime = DateTimeOffset.UtcNow.AddDays(-7); // only the last 7 days of activities are stored: https://developer.apple.com/documentation/coremotion/cmmotionactivitymanager/1615929-queryactivitystarting
}
ManualResetEvent queryWait = new ManualResetEvent(false);
SensusContext.Current.MainThreadSynchronizer.ExecuteThreadSafe(() =>
{
try
{
CMMotionActivityManager activityManager = new CMMotionActivityManager();
activityManager.QueryActivity(_queryStartTime.Value.UtcDateTime.ToNSDate(), NSDate.Now, NSOperationQueue.CurrentQueue, (activities, error) =>
{
try
{
if (error == null)
{
// process each activity, keeping track of most recent
NSDate mostRecentActivityStartTime = null;
foreach (CMMotionActivity activity in activities)
{
DateTimeOffset timestamp = new DateTimeOffset(activity.StartDate.ToDateTime(), TimeSpan.Zero);
#region get confidence
double confidence = 0;
if (activity.Confidence == CMMotionActivityConfidence.Low)
{
confidence = 0;
}
else if (activity.Confidence == CMMotionActivityConfidence.Medium)
{
confidence = 0.5;
}
else if (activity.Confidence == CMMotionActivityConfidence.High)
{
confidence = 1;
}
else
{
SensusException.Report("Unrecognized confidence: " + activity.Confidence);
}
#endregion
#region get activities
Action <Activities> AddActivityDatum = activityType =>
{
ActivityDatum activityDatum = new ActivityDatum(timestamp, activityType, ActivityPhase.During, ActivityState.Active, confidence);
data.Add(activityDatum);
};
if (activity.Stationary)
{
AddActivityDatum(Activities.Still);
}
if (activity.Walking)
{
AddActivityDatum(Activities.Walking);
}
if (activity.Running)
{
AddActivityDatum(Activities.Running);
}
if (activity.Automotive)
{
AddActivityDatum(Activities.InVehicle);
}
if (activity.Cycling)
{
AddActivityDatum(Activities.OnBicycle);
}
if (activity.Unknown)
{
AddActivityDatum(Activities.Unknown);
}
#endregion
if (mostRecentActivityStartTime == null)
{
mostRecentActivityStartTime = activity.StartDate;
}
else
{
mostRecentActivityStartTime = mostRecentActivityStartTime.LaterDate(activity.StartDate);
}
}
// set the next query start time one second after the most recent activity's start time
if (mostRecentActivityStartTime != null)
{
_queryStartTime = new DateTime(mostRecentActivityStartTime.ToDateTime().Ticks, DateTimeKind.Utc).AddSeconds(1);
}
}
else
{
SensusServiceHelper.Get().Logger.Log("Error while querying activities: " + error, LoggingLevel.Normal, GetType());
}
}
catch (Exception ex)
{
SensusServiceHelper.Get().Logger.Log("Exception while querying activities: " + ex, LoggingLevel.Normal, GetType());
}
finally
{
queryWait.Set();
}
});
}
catch (Exception ex)
{
SensusServiceHelper.Get().Logger.Log("Exception while querying activities: " + ex, LoggingLevel.Normal, GetType());
queryWait.Set();
}
});
WaitHandle.WaitAny(new[] { queryWait, cancellationToken.WaitHandle });
return(data);
}