Pronoid Android

• MapView code
  

  A fully functional MapViewDelegate implementation for you. All you have to do to start putting items on maps is make them implement MKAnnotation, which is super-easy.
  
  

  
  - (MKAnnotationView *)mapView:(MKMapView *)myMapView viewForAnnotation:(id )annotation {
   
   //this is clumsy, but there's no obvious better way - otherwise it crashes when showing user location
   if (![annotation isKindOfClass:[ECEntry class]])
    return nil;
  
   ECEntry *myEntry = (ECEntry*)annotation;
   
   MKPinAnnotationView *myView = (MKPinAnnotationView*)[myMapView dequeueReusableAnnotationViewWithIdentifier:@"Local"];
   if (myView==nil)
    myView = [[[MKPinAnnotationView alloc] initWithAnnotation:annotation reuseIdentifier:@"Local"] autorelease];
   myView.pinColor = myEntry.groupID==0 ? MKPinAnnotationColorGreen : MKPinAnnotationColorRed;
   myView.canShowCallout=YES;
   myView.rightCalloutAccessoryView = [UIButton buttonWithType:UIButtonTypeDetailDisclosure];
   return myView;
  }
  
  - (void)mapView:(MKMapView *)mapView annotationView:(MKAnnotationView *)view calloutAccessoryControlTapped:(UIControl *)control {
   ECEntryViewController *entryViewController = [[ECEntryViewController alloc] initWithNibName:nil bundle:nil];
   entryViewController.myEntry = (ECEntry*)[view annotation];
   [self.navigationController pushViewController:entryViewController animated:YES];
   [entryViewController release];
  }
  

  
  
  
  
• Using the camera via UIImagePickerController
  

  So this is amazingly easy, and I can even provide you with some code that
  a) launches a camera, phot-album selector, or photo-library selector, depending on what's available on your device:
  b) presents the image picker as a modal view controller, keeping it within your existing NavigationController tree:
  c) gets the selected/captured image (via UIImagePickerControllerDelegate) and saves it to a file.
  
  

  
  -(void) doCamera {
   BOOL hasCamera = [UIImagePickerController isSourceTypeAvailable:UIImagePickerControllerSourceTypeCamera];
   BOOL hasAlbum = [UIImagePickerController isSourceTypeAvailable:UIImagePickerControllerSourceTypeSavedPhotosAlbum];
   BOOL hasLibrary = [UIImagePickerController isSourceTypeAvailable:UIImagePickerControllerSourceTypePhotoLibrary];
  
   if (hasCamera || hasAlbum || hasLibrary) {
    UIImagePickerController *photoController = [[UIImagePickerController alloc] init];
    photoController.delegate = self;
  
    if (hasCamera)
     photoController.sourceType = UIImagePickerControllerSourceTypeCamera;
    else if (hasAlbum) {
     photoController.sourceType = UIImagePickerControllerSourceTypeSavedPhotosAlbum;
     NSString *warningMessage = [NSString localizedStringWithFormat:@"Your device has no camera, but does have an album of saved photos to choose from"];
     [Util doAlert:NSLocalizedString(@"Warning",@"Alert title") withMessage:warningMessage];
    }
    else if (hasLibrary) {
     photoController.sourceType = UIImagePickerControllerSourceTypePhotoLibrary;
     NSString *warningMessage = [NSString localizedStringWithFormat:@"Your device has no camera, but does have a photo library to choose from"];
     [Util doAlert:NSLocalizedString(@"Warning",@"Alert title") withMessage:warningMessage];
    }
    
    [self doSave];
    [self presentModalViewController:photoController animated:YES];
    [photoController release];
   }
   else {
    NSString *alertMessage = [NSString localizedStringWithFormat:@"Your device does not support photos"];
    [Util doAlert:NSLocalizedString(@"No photo support",@"Alert title") withMessage:alertMessage];
   }
  }
  
  - (void)imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary *)info {
  
   UIImage *image = [info objectForKey:UIImagePickerControllerEditedImage];
   if (image == nil)
    image = [info objectForKey:UIImagePickerControllerOriginalImage];
  
   //TODO, if possible: if the image has already been saved, just use its path, don't save it again
  
   if (image!=nil) {
    //convert image to NSData - use Settings for PNG/JPG
    [Util showActivity];
    NSData *imageData=nil;
    if ([Settings saveImagesAsPNG])
     imageData = [NSData dataWithData:UIImagePNGRepresentation(image)];
    else
     imageData = [NSData dataWithData:UIImageJPEGRepresentation(image, [Settings getJPEGQuality])];
   
    //save NSData to file
    NSString *pathDir = [Util getApplicationDocumentsPath]; 
    NSString *fileName = [[NSProcessInfo processInfo] globallyUniqueString];
    fileName = [fileName stringByAppendingString:([Settings saveImagesAsPNG] ? @".png" : @".jpg")];
    NSString *fullPath = [pathDir stringByAppendingPathComponent:fileName];
  
    NSError *error=nil;
    [imageData writeToFile:fullPath options:NSAtomicWrite error:&error];
    if (error) {
     NSString *errorMessage = [NSString localizedStringWithFormat:@"Unable to write to file %@: %@ - %@", fullPath, error, [error userInfo]];
     [Util doAlert:NSLocalizedString(@"Error",@"Alert title") withMessage:errorMessage];
    }
    [Util stopShowingActivity];
   
    //set entry
    myEntry.photoPath=fileName;
  
    //all done
    [self dismissModalViewControllerAnimated:YES];
    [self.tableView reloadData];
   }
  }
  
  - (void)imagePickerControllerDidCancel:(UIImagePickerController *)picker {
   [self dismissModalViewControllerAnimated:YES];
   [self.tableView reloadData];
  }
  
  

  
  
  
• Unit test woes
  

  I've been having loads of trouble with the allegedly-baked-in unit-testing framework described here. Specifically, I get masses of "symbol(s) not found" linker errors when I try to compile for the Testing target, re all kinds of basic UIKit and CoreData stuff. I presume it's some kind of importing-the-wrong-kind-of-framework problem, but I have no idea how to correct it, and I don't want to dive into the seething nest of rattlesnakes that is the innards of XCode's build process. Should I just switch to the Google unit-test framework for iPhone?
  

Labels: ImagePicker, iPhone, MapView, MKAnnotation, MKMapView, presentModalViewController, SenTestingKit, UIImagePIckerController, UIImagePickerControllerDelegate

# posted by Jon @ 9:31 AM