public override async void ViewDidAppear(bool animated)
{
base.ViewDidAppear(animated);
this.NavigationController.NavigationBar.AccessibilityLabel = Constants.NavigationBarAccessibilityLabel_AnalysisPage;
// TODO Notify the user that there was an error
// If images are null return back to Image Input
if (this.InputImage == null || this.InputImageBitmap == null)
{
this.NavigationController.PopViewController(true);
return;
}
cancellationTokenSource = new CancellationTokenSource();
// Retrieve the shared AI Client that was loaded by the AppDelegate
ChestXRayAIClient aiClient = ((AppDelegate)UIApplication.SharedApplication.Delegate).AIClient;
System.Diagnostics.Debug.WriteLine("AI Client retrieved from AppDelegate");
try
{
(ScoreOutput[] scores, CAM[] cams) = await ChestXRayAIRunner.Analyze(aiClient, InputImageBitmap, cancellationTokenSource.Token);
System.Diagnostics.Debug.WriteLine("Analysis completed");
LaunchResults(scores, cams);
}
catch (OperationCanceledException)
{
System.Diagnostics.Debug.WriteLine("Analysis cancelled");
}
}
protected override async void OnResume()
{
base.OnResume();
// Set a flag so we know the activity is in the foreground
activityResumed = true;
// Makes sure that this only runs the first time OnResume is called
if (cancellationTokenSource == null)
{
cancellationTokenSource = new CancellationTokenSource();
// Retrieve the shared AI Client that was loaded by the MainApplication class
ChestXRayAIClient aiClient = ((MainApplication)this.Application).AIClient;
System.Diagnostics.Debug.WriteLine("AI Client retrieved from MainApplication class");
try
{
// Load image
SKBitmap image = await LoadImage(cancellationTokenSource.Token);
System.Diagnostics.Debug.WriteLine("Image loaded");
// Run analysis and save results
(scores, cams) = await ChestXRayAIRunner.Analyze(aiClient, image, cancellationTokenSource.Token);
System.Diagnostics.Debug.WriteLine("Analysis completed");
// Release the SKBitmap
image.Dispose();
// If the activity is currently in the foreground immediately finish the analysis
if (activityResumed)
{
FinishAnalysis();
}
else
{
// Otherwise set a flag to finish the analysis when the activity does become the foreground activity
finishAnalysisOnResume = true;
}
}
catch (System.OperationCanceledException) // NOT Android.OS.OperationCanceledException
{
System.Diagnostics.Debug.WriteLine("Analysis cancelled");
}
}
else if (finishAnalysisOnResume)
{
// Analysis completed while we were in the background, so finish the analysis now that we're in the foreground
FinishAnalysis();
}
}
