public NotifyItem(HRStatus curr, int HR)
{
time = DateTime.Now;
heartStatus = curr;
noteStat = NoteStatus.None;
this.HR = HR;
}
public static void CheckAndCreateNotification(Context context, user_page userPage, int HR)
{
// In case the user ask to ignore and the ignore counter is still counting we will not do anything
if (ignore)
{
return;
}
// Extracting the current HB status
HRStatus heartStatus = calcCurrentStatus(userPage, HR);
// Create NotifyItem item and put it in the
statusHistoryList.Add(new NotifyItem(heartStatus, HR));
// Creating notifications for heach one of the cases
if (heartStatus != HRStatus.Normal)
{
NotifyHeartRate(context, userPage, HR, heartStatus);
}
}
protected override void OnCreate(Bundle savedInstanceState)
{
base.OnCreate(savedInstanceState);
// Getting staus and HR from last activity
HRStatus status = (HRStatus)Intent.Extras.GetInt("status", -1);
int HR = Intent.Extras.GetInt("HR", -1);
int ignoreTIme = 60; // in Seconds
// UI chart
SetContentView(Resource.Layout.activity_notification);
Button bdismiss = (Button)FindViewById(Id.dismiss);
Button bemergency = (Button)FindViewById(Id.emergency);
Button bignore = (Button)FindViewById(Id.ignore);
// Need to add layout and content to the Notification
// Display the count sent from the first activity:
TextView textView = FindViewById <TextView>(Resource.Id.textView);
textView.Text = string.Format(
"Your heart beat {1} to {0} bpm.", HR,
status == HRStatus.Hypo ? "decreased dramaticaly" :
status == HRStatus.Hyper ? "increased dramaticaly" :
"is not stable and changed dramatically");
TextView textHR = FindViewById <TextView>(Resource.Id.myImageViewText);
textHR.Text = string.Format("{0}", HR);
// Clicking ignore will start a downtime counter for the next 60 seconds
// Maybe should replace it to ignore till says otherwise
bignore.Click += async(sender, e) =>
{
NotificationHandler.ignore = true;
var cts = new CancellationTokenSource();
cts.CancelAfter(ignoreTIme * 1000); // 60 sec
try
{
await TimerAsync(1000, cts.Token);
Finish();
}
catch (AggregateException aex)
{
aex.Handle(ex =>
{
// Handle the cancelled tasks
TaskCanceledException tcex = ex as TaskCanceledException;
if (tcex != null)
{
NotificationHandler.ignore = false;
return(true);
}
// Not handling any other types of exception.
System.Diagnostics.Debug.WriteLine(aex.StackTrace);
return(false);
});
}
};
bemergency.Click += delegate
{
var uri = Android.Net.Uri.Parse("tel:101");
var intent = new Intent(Intent.ActionDial, uri);
StartActivity(intent);
};
bdismiss.Click += async(sender, e) =>
{
Finish();
};
// This task runs in the background til it gets a cancellation request
async Task TimerAsync(int interval, CancellationToken token)
{
while (token.IsCancellationRequested)
{
await Task.Delay(interval, token);
}
}
}
private static HRStatus calcCurrentStatus(user_page userPage, int HR)
{
HRStatus last;
HRStatus retStatus = HRStatus.Normal;
DateTime now = DateTime.Now;
var lastItem = statusHistoryList.LastOrDefault();
last = lastItem.Equals(default(NotifyItem)) ? HRStatus.Normal : lastItem.heartStatus;
// Fixme: there is a period of time inwhich no matter how "normal" your heart rate you are still in
// abnormal condition - maybe we should add a counter or some thing that will tell us until when the
// status is still abnormal.
// Meanwhile - when the current status is the normal range we will consider it as normal condition
// REGARDLESS the previous condition.
switch (last)
{
case HRStatus.Hyper:
// Hypo
if (HR < minHRBound || HR <= (userPage.avg - 2 * System.Math.Sqrt(userPage.variance))) // or less than HR < |avg -2*std|
{
retStatus = HRStatus.NotStable;
}
// Hyper
if (HR > maxHRBound || HR >= (userPage.avg + 2 * System.Math.Sqrt(userPage.variance))) // or more than HR > |avg +2*std|
{
retStatus = HRStatus.Hyper;
}
break;
case HRStatus.Hypo:
// Hypo
if (HR < minHRBound || HR <= (userPage.avg - 2 * System.Math.Sqrt(userPage.variance))) // or less than HR < |avg -2*std|
{
retStatus = HRStatus.Hypo;
}
// Hyper
if (HR > maxHRBound || HR >= (userPage.avg + 2 * System.Math.Sqrt(userPage.variance))) // or more than HR > |avg +2*std|
{
retStatus = HRStatus.NotStable;
}
break;
case HRStatus.NotStable:
// Check if the limit time of none regular HB time is passed
if (now.Subtract(notStableTime) < lastItem.time)
{
retStatus = HRStatus.NotStable;
}
// Hypo
if (HR < minHRBound || HR <= (userPage.avg - 2 * System.Math.Sqrt(userPage.variance))) // or less than HR < |avg -2*std|
{
retStatus = HRStatus.Hypo;
}
// Hyper
if (HR > maxHRBound || HR >= (userPage.avg + 2 * System.Math.Sqrt(userPage.variance))) // or more than HR > |avg +2*std|
{
retStatus = HRStatus.Hyper;
}
break;
case HRStatus.Normal:
if (HR < minHRBound || HR <= (userPage.avg - 2 * System.Math.Sqrt(userPage.variance))) // or less than HR < |avg -2*std|
{
retStatus = HRStatus.Hypo;
}
// Hyper
if (HR > maxHRBound || HR >= (userPage.avg + 2 * System.Math.Sqrt(userPage.variance))) // or more than HR > |avg +2*std|
{
retStatus = HRStatus.Hyper;
}
break;
}
// In case of ublormal HR we will remove far history items from statusHistoryList
if (retStatus != HRStatus.Normal)
{
statusHistoryList.RemoveAll(x => now.Subtract(historyTime) >= x.time);
}
// In case the status OK
return(retStatus);
}
private static void NotifyHeartRate(Context context, user_page userPage, int HR, HRStatus status)
{
// When the user clicks the notification, SecondActivity will start up.
Intent resultIntent = new Intent(userPage, typeof(NotificationActivity));
// Passing HR and HRStatus to notification activity
Bundle valuesForActivity = new Bundle();
valuesForActivity.PutInt("status", (int)status);
valuesForActivity.PutInt("HR", HR);
resultIntent.PutExtras(valuesForActivity);
// Construct a back stack for cross-task navigation:
TaskStackBuilder stackBuilder = TaskStackBuilder.Create(context);
stackBuilder.AddParentStack(Java.Lang.Class.FromType(typeof(NotificationActivity)));
stackBuilder.AddNextIntent(resultIntent);
// Create the PendingIntent with the back stack:
PendingIntent resultPendingIntent =
stackBuilder.GetPendingIntent(0, (int)PendingIntentFlags.UpdateCurrent | (int)PendingIntentFlags.OneShot);
// Build the notification:
NotificationCompat.Builder builder = new NotificationCompat.Builder(context)
.SetAutoCancel(true) // Dismiss from the notif. area when clicked
.SetContentIntent(resultPendingIntent) // Start 2nd activity when the intent is clicked.
.SetContentTitle("Is everything OK?") // Set its title
.SetNumber(HR) // Display the HR in the Content Info
.SetSmallIcon(Resource.Drawable.emptyheart_white) // Display this icon
.SetContentText(string.Format(
"Your heart beat {0} to {1} bpm.",
status == HRStatus.Hypo ? "decreased dramaticaly" :
status == HRStatus.Hyper ? "increased dramaticaly" :
"is not stable and changed dramatically", HR)); // The message to display.
// Finally, publish the notification:
NotificationManager notificationManager =
(NotificationManager)context.GetSystemService(Context.NotificationService);
notificationManager.Notify(ButtonClickNotificationId, builder.Build());
}
