i am trying to take a picture and video from within the app and trying to share it through share charm but i am having a problem doing that. After i take the pic ,the share charm says it has trouble sharing the image. This is my code .Can anybody please let me know what i am doing wrong.
namespace Temp
{
/// <summary>
/// An empty page that can be used on its own or navigated to within a Frame.
/// </summary>
public sealed partial class Page1 : Page
{
private StorageFile _photo; // Photo file to share
private StorageFile _video; // Video file to share
private async void OnCapturePhoto(object sender, TappedRoutedEventArgs e)
{
var camera = new CameraCaptureUI();
var file = await camera.CaptureFileAsync(CameraCaptureUIMode.Photo);
if (file != null)
{
_photo = file;
DataTransferManager.ShowShareUI();
}
}
private async void OnCaptureVideo(object sender, TappedRoutedEventArgs e)
{
var camera = new CameraCaptureUI();
camera.VideoSettings.Format = CameraCaptureUIVideoFormat.Wmv;
var file = await camera.CaptureFileAsync(CameraCaptureUIMode.Video);
if (file != null)
{
_video = file;
DataTransferManager.ShowShareUI();
}
}
void OnDataRequested(DataTransferManager sender, DataRequestedEventArgs args)
{
var request = args.Request;
if (_photo != null)
{
request.Data.Properties.Description = "Component photo";
var reference = Windows.Storage.Streams.RandomAccessStreamReference.CreateFromFile(_photo);
request.Data.Properties.Thumbnail = reference;
request.Data.SetBitmap(reference);
_photo = null;
}
else if (_video != null)
{
request.Data.Properties.Description = "Component video";
List<StorageFile> items = new List<StorageFile>();
items.Add(_video);
request.Data.SetStorageItems(items);
_video = null;
}
}
}
protected override void OnNavigatedTo(NavigationEventArgs e)
{
DataTransferManager.GetForCurrentView().DataRequested += OnDataRequested;
}
}
In order for your app to share, you must set the Title of the DataPackagePropertySet and at least one of the "SetXXX" methods. If you do not, you'll see the following message when trying to share "There was a problem with the data from ."
So add request.Data.Properties.Title = "Title_of_photo_or_video"; in OnDataRequested event.
Related
I want to set image.Source via async stream in an UWP application. Otherwise the image will flicker when switch to other image source.
My code is as below. And the log shows it works. Certainly I put 2 image files in the corresponding path before I test the demo code.
But in fact I did not see any picture shown, why?
Log:
111111111111 image file path = C:\Users\tomxu\AppData\Local\Packages\a0ca0192-f41a-43ca-a3eb-f128a29b00c6_1qkk468v8nmy0\LocalState\2.jpg
22222222222
33333333333333
4444444444444
The thread 0x6d38 has exited with code 0 (0x0).
The thread 0x6a34 has exited with code 0 (0x0).
111111111111 image file path = C:\Users\tomxu\AppData\Local\Packages\a0ca0192-f41a-43ca-a3eb-f128a29b00c6_1qkk468v8nmy0\LocalState\1.jpg
22222222222
33333333333333
4444444444444
Code:
private async void setImageSource(string imageFilePath)
{
StorageFile sFile = await StorageFile.GetFileFromPathAsync(imageFilePath);
Debug.WriteLine("111111111111 image file path = " + imageFilePath);
Stream fileStream = await sFile.OpenStreamForReadAsync();
Debug.WriteLine("22222222222");
InMemoryRandomAccessStream ras = new InMemoryRandomAccessStream();
Debug.WriteLine("33333333333333");
await fileStream.CopyToAsync(ras.AsStreamForRead());
Debug.WriteLine("4444444444444");
BitmapImage bi = new BitmapImage();
bi.SetSource(ras);
image1.Source = bi;
}
private async void Button_Click(object sender, RoutedEventArgs e)
{
string fullFolder = ApplicationData.Current.LocalFolder.Path;
if (count % 2 == 1)
{
setImageSource(fullFolder + #"\1.jpg");
//image1.Source = new BitmapImage(new Uri(#"ms-appx:///Assets/1.jpg"));
}
else
{
setImageSource(fullFolder + #"\2.jpg");
//image1.Source = new BitmapImage(new Uri(#"ms-appx:///Assets/2.jpg"));
}
count++;
}
Here is an example of how I convert a base64 image string to a BitmapImage..
var ims = new InMemoryRandomAccessStream();
var bytes = Convert.FromBase64String(base64String);
var dataWriter = new DataWriter(ims);
dataWriter.WriteBytes(bytes);
await dataWriter.StoreAsync();
ims.Seek(0);
var img = new BitmapImage();
img.SetSource(ims);
ims.Dispose();
return img;
Try some of the things I'm doing there. Like I notice your code is not setting the seek of the InMemoryReadAccessStream
For your question, I have something to clarify with you.
Your pictures are always in the application data folder. If you want to show it at runtime by programming, the easy way is using the ms-appdata URI scheme to refer to files that come from the app's local, roaming, and temporary data folders. Then, you could use this URL to initialize the BitmapImage object. With this way, you don't need to manually manipulate the file stream.
private void setImageSource(int i)
{
BitmapImage bi = new BitmapImage(new Uri("ms-appdata:///local/"+i+".png"));
image1.Source = bi;
}
private int count = 0;
private void Button_Click(object sender, RoutedEventArgs e)
{
if (count % 2 == 1)
{
setImageSource(1);
}
else
{
setImageSource(2);
}
count++;
}
If you say you have to manipulate the file stream to initialize the BitmaImage, then please add some break points to debug your code. If you add break points to check the InMemoryRandomAccessStream after call CopyToAsync method, you will see that its size is 0. It meant that the file stream has not been wrote to it. To solve this issue, you need to set a buffer size for it. Note: you used ras.AsStreamForRead() method, it's incorrect. You're writing stream to it, so you need to call ras.AsStreamForWrite().
The code looks like the following:
private async void setImageSource(string imageFilePath)
{
StorageFile sFile = await StorageFile.GetFileFromPathAsync(imageFilePath);
using (Stream fileStream = await sFile.OpenStreamForReadAsync())
{
using (InMemoryRandomAccessStream ras = new InMemoryRandomAccessStream())
{
await fileStream.CopyToAsync(ras.AsStreamForWrite((int)fileStream.Length));
ras.Seek(0);
BitmapImage bi = new BitmapImage();
bi.SetSource(ras);
img.Source = bi;
}
}
}
private int count = 0;
private void Button_Click(object sender, RoutedEventArgs e)
{
string fullFolder = ApplicationData.Current.LocalFolder.Path;
if (count % 2 == 1)
{
setImageSource(fullFolder + #"\1.jpg");
}
else
{
setImageSource(fullFolder + #"\2.jpg");
}
count++;
}
In addition, like #visc said, you need to call ras.Seek(0) method to reset the stream to beginning, else the image will not show there.
I have this quite simple app, to upload pictures to Firebase directly from camera, written following the original documentation from Android developpers page. It works very well on emulators, but on my Galaxy S4 it crashes. The variable imageFileName gets null on onActivityResult, but only in GS4. Here is what is get in emulators:
I/TAG 0:: FILENAME JPEG_20170420_005617_
I/TAG 1:: FILENAME JPEG_20170420_005617_
And here is what is get in GS4:
I/TAG 0:: FILENAME JPEG_20170420_005617_
I/TAG 1:: FILENAME null
Why it gets null out of nothing? Why on S4? Without this value I cant putFile to Firebase. Only with GS4.
Thanks for your help.
private FirebaseAuth firebaseAuth = FirebaseAuth.getInstance();
private StorageReference mStorage;
private Button mSelect, mCam;
public Uri uri, photoURI;
private String imageFileName;
private ProgressDialog mProgressDialog;
private static final int GALLERY_INTENT = 2;
private static final int CAMERA_REQUEST_CODE = 1;
static final int REQUEST_TAKE_PHOTO = 1;
String mCurrentPhotoPath;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
mStorage = FirebaseStorage.getInstance().getReference();
mSelect = (Button) findViewById(R.id.first_but);
mCam = (Button) findViewById(R.id.sec_but);
mProgressDialog = new ProgressDialog(this);
mCam.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
//Intent intent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
//startActivityForResult(intent, CAMERA_REQUEST_CODE);
dispatchTakePictureIntent();
}
});
}
#Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
super.onActivityResult(requestCode, resultCode, data);
if(requestCode == REQUEST_TAKE_PHOTO && resultCode == RESULT_OK) {
Log.i("TAG 1: ", "FILENAME " + imageFileName);
}
}
private File createImageFile() throws IOException {
// Create an image file name
String timeStamp = new SimpleDateFormat("yyyyMMdd_HHmmss").format(new Date());
imageFileName = "JPEG_" + timeStamp + "_";
File storageDir = getExternalFilesDir(Environment.DIRECTORY_PICTURES);
File image = File.createTempFile(
imageFileName, /* prefix */
".jpg", /* suffix */
storageDir /* directory */
);
// Save a file: path for use with ACTION_VIEW intents
mCurrentPhotoPath = image.getAbsolutePath();
return image;
}
private void dispatchTakePictureIntent() {
Intent takePictureIntent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
// Ensure that there's a camera activity to handle the intent
if (takePictureIntent.resolveActivity(getPackageManager()) != null) {
// Create the File where the photo should go
File photoFile = null;
try {
photoFile = createImageFile();
} catch (IOException ex) {
// Error occurred while creating the File
}
// Continue only if the File was successfully created
if (photoFile != null) {
photoURI = FileProvider.getUriForFile(this,
"com.example.android.fileprovider",
photoFile);
Log.i("TAG 0: ", "FILENAME " + imageFileName);
takePictureIntent.putExtra(MediaStore.EXTRA_OUTPUT, photoURI);
startActivityForResult(takePictureIntent, REQUEST_TAKE_PHOTO);
}
}
}
Weirdly, what solved the probem was adding this to AdroidManifest.xml
<activity
android:name=".YourActivity"
android:configChanges="orientation|keyboardHidden|screenSize"
android:screenOrientation="portrait" >
</activity>
Thanks to #Janine Kroser
original post: Photo capture Intent causes NullPointerException on Samsung phones only
I still would like some explanation to that, other than "Samsung is weird". Is it possible that the orientation change would destroy some activity containing data?
I have a code which show privacy policy URL in charm settings bar.But what I need is like when user clicks on the privacy policy link it should open another page in charm settings with a back button.How to do the same in the below code
private async void OpenPrivacyPolicy(IUICommand command)
{
Uri uri = new Uri("https://sites.google.com/site/mysite/");
await Windows.System.Launcher.LaunchUriAsync(uri);
}
Finally I figured out the solution,thanks to windows 8.1 Appsetting sample app . First of all add a settingsFlyout XAML page to your project.I added the privacy flyout code in my app's home page like this
protected override void OnNavigatedTo(NavigationEventArgs e)
{
SettingsPane.GetForCurrentView().CommandsRequested += onCommandsRequested;
}
protected override void OnNavigatedFrom(NavigationEventArgs e)
{
SettingsPane.GetForCurrentView().CommandsRequested -= onCommandsRequested;
}
void onCommandsRequested(SettingsPane settingsPane, SettingsPaneCommandsRequestedEventArgs e)
{
SettingsCommand defaultsCommand = new SettingsCommand("Privacy", "Privacy",
(handler) =>
{
Privacy sf = new Privacy();
sf.Show();
});
e.Request.ApplicationCommands.Add(defaultsCommand);
}
then in my Privacy.xaml page I added the following code
public Privacy()
{
this.InitializeComponent();
this.Loaded += (sender, e) =>
{
Window.Current.CoreWindow.Dispatcher.AcceleratorKeyActivated += SettingsFlyout1_AcceleratorKeyActivated;
};
this.Unloaded += (sender, e) =>
{
Window.Current.CoreWindow.Dispatcher.AcceleratorKeyActivated -= SettingsFlyout1_AcceleratorKeyActivated;
};
}
void SettingsFlyout1_AcceleratorKeyActivated(CoreDispatcher sender, AcceleratorKeyEventArgs args)
{
// Only investigate further when Left is pressed
if (args.EventType == CoreAcceleratorKeyEventType.SystemKeyDown &&
args.VirtualKey == VirtualKey.Left)
{
var coreWindow = Window.Current.CoreWindow;
var downState = CoreVirtualKeyStates.Down;
bool menuKey = (coreWindow.GetKeyState(VirtualKey.Menu) & downState) == downState;
bool controlKey = (coreWindow.GetKeyState(VirtualKey.Control) & downState) == downState;
bool shiftKey = (coreWindow.GetKeyState(VirtualKey.Shift) & downState) == downState;
if (menuKey && !controlKey && !shiftKey)
{
args.Handled = true;
this.Hide();
}
}
}
Thanks for all the help everyone! And this code works!If anyone facing difficulty just hit me ;)
How do I enter snap state using the Windows 8 emulator? I received a notice from the Windows 8 store that my software crashes in snap mode only. Does anyone know why switching modes would cause my software to crash? Here is my code behind:
namespace MenuFinderWin8.Pages
{
public sealed partial class RestaurantHomePage : MenuFinderWin8.Common.LayoutAwarePage
{
MenuFinderAppServiceClient serviceClient;
RestaurantRepository repository;
Geolocator _geolocator = null;
ObservableCollection<RestaurantLocation> items;
public RestaurantHomePage()
{
this.InitializeComponent();
if (!Network.IsNetwork())
{
return;
}
repository = new RestaurantRepository();
serviceClient = new MenuFinderAppServiceClient();
_geolocator = new Geolocator();
items = new ObservableCollection<RestaurantLocation>();
BindData();
}
void btnAbout_Click(object sender, RoutedEventArgs e)
{
Flyout f = new Flyout();
LayoutRoot.Children.Add(f.HostPopup); // add this to some existing control in your view like the root visual
// remove the parenting during the Closed event on the Flyout
f.Closed += (s, a) =>
{
LayoutRoot.Children.Remove(f.HostPopup);
};
// Flyout is a ContentControl so set your content within it.
SupportUserControl userControl = new SupportUserControl();
userControl.UserControlFrame = this.Frame;
f.Content = userControl;
f.BorderBrush = new SolidColorBrush(Windows.UI.Color.FromArgb(255, 223, 58, 51));
f.Width = 200;
f.Height = 200;
f.Placement = PlacementMode.Top;
f.PlacementTarget = sender as Button; // this is an UI element (usually the sender)
f.IsOpen = true;
}
void btnSearch_Click(object sender, RoutedEventArgs e)
{
Flyout f = new Flyout();
LayoutRoot.Children.Add(f.HostPopup); // add this to some existing control in your view like the root visual
// remove the parenting during the Closed event on the Flyout
f.Closed += (s, a) =>
{
LayoutRoot.Children.Remove(f.HostPopup);
};
// Flyout is a ContentControl so set your content within it.
RestaurantSearchUserControl userControl = new RestaurantSearchUserControl();
userControl.UserControlFrame = this.Frame;
f.Content = userControl;
f.BorderBrush = new SolidColorBrush(Windows.UI.Color.FromArgb(255, 223, 58, 51));
f.Width = 600;
f.Height = 400;
f.Placement = PlacementMode.Top;
f.PlacementTarget = sender as Button; // this is an UI element (usually the sender)
f.IsOpen = true;
}
void btnViewFavorites_Click(object sender, RoutedEventArgs e)
{
App.DataMode = Mode.SavedRestaurant;
if (repository.GetGroupedRestaurantsFromDatabase().Count() == 0)
{
MessageDialog messageDialog = new MessageDialog("You have no saved restaurants.", "No Restaurants");
messageDialog.ShowAsync();
}
else
{
this.Frame.Navigate(typeof(RestaurantSearchDetails));
}
}
private async void BindData()
{
try
{
items = await serviceClient.GetSpecialRestaurantsAsync();
List<RestaurantLocation> myFavs = repository.GetRestaurantLocations();
foreach (var a in myFavs)
{
items.Add(a);
}
this.DefaultViewModel["Items"] = items;
}
catch (Exception)
{
MessageDialog messsageDialog = new MessageDialog("The MenuFinder service is unavailable at this time or you have lost your internet connection. If your internet is OK, please check back later.", "Unavailable");
messsageDialog.ShowAsync();
btnAbout.IsEnabled = false;
btnSearch.IsEnabled = false;
btnViewFavorites.IsEnabled = false;
}
myBar.Visibility = Windows.UI.Xaml.Visibility.Collapsed;
}
/// <summary>
/// Populates the page with content passed during navigation. Any saved state is also
/// provided when recreating a page from a prior session.
/// </summary>
/// <param name="navigationParameter">The parameter value passed to
/// <see cref="Frame.Navigate(Type, Object)"/> when this page was initially requested.
/// </param>
/// <param name="pageState">A dictionary of state preserved by this page during an earlier
/// session. This will be null the first time a page is visited.</param>
protected override void LoadState(Object navigationParameter, Dictionary<String, Object> pageState)
{
// TODO: Assign a bindable collection of items to this.DefaultViewModel["Items"]
}
private void itemGridView_ItemClick_1(object sender, ItemClickEventArgs e)
{
App.CurrentRestaurantLocation = e.ClickedItem as RestaurantLocation;
if (App.CurrentRestaurantLocation != null)
{
Order order = repository.AddOrder(DateTime.Now, string.Empty, App.CurrentRestaurantLocation.ID);
App.CurrentOrder = order;
App.DataMode = Mode.Menu;
this.Frame.Navigate(typeof(RootViewPage));
}
}
}
}
In response to "How do I enter snap state using the Windows 8 emulator?" - I find the easiest way to snap in the simulator is to use the keyboard shortcut, which is Windows key + . (period).
The error might be in your XAML, more than in the code behind. If you used a template but deleted or modified the name in one of the elements, the KeyFrame refering to that element is failing getting the element, so an exception is thrown.
Search in your XAML for something like
<VisualState x:Name="Snapped">
<Storyboard>...
And delete the ObjectAnimationUsingKeyFrames tags which Storyboard.TargetName property is equal to a non-existant element.
Refering on how to enter Snapped Mode on the emulator, is the same as in PC, just grab the App from the top and slide it to a side while holding the click.
My project is about Remoting and i want to add a webcam component to it. Here it goes: I have 3 project in my solution... Client, Server, Remote.dll. In Remote.dll is a common class which has methods works in server machine. When i call these methods from Client it executes in server side. So now my question is i put the code of Webcam in remote.dll and it has an event called "video_NewFrame" which it works everytime when webcam catch an image. But i cant reach to the images from my Client side because when code drops to this event it executes infinitely
and my timer in Client side doesnt work as well. I tried to assing image to my global variable but whenever code goes to client and comes to Remote.dll again my variable is null...
How can i reach simultaneously captured images from my client? here is my code:
(i use AForge framework for webcam)
private bool DeviceExist = true;
private FilterInfoCollection videoDevices;
private VideoCaptureDevice videoSource = null;
public bool WebCamStart(int DeviceIndex)
{
if (DeviceExist)
{
videoDevices = new FilterInfoCollection(FilterCategory.VideoInputDevice);
//string myDevice = videoDevices[0].Name;
videoSource = new VideoCaptureDevice(videoDevices[0].MonikerString);
videoSource.NewFrame += new NewFrameEventHandler(video_NewFrame);
CloseVideoSource();
videoSource.DesiredFrameSize = new Size(640, 480);
//videoSource.DesiredFrameRate = 10;
videoSource.Start();
return true;
}
else return false;
}
public Bitmap lastImg;
private void video_NewFrame(object sender, NewFrameEventArgs eventArgs)
{
Bitmap img = (Bitmap)eventArgs.Frame.Clone();
//in executes infinitely when execution comes here and i cant reach from Cliend side...
}
public string getFPS()
{
return videoSource.FramesReceived.ToString();
}
public void CloseVideoSource()
{
if (!(videoSource == null))
if (videoSource.IsRunning)
{
videoSource.SignalToStop();
videoSource.Stop();
videoSource = null;
}
}
public string getCamList()
{
string result = "No Device Found";
try
{
videoDevices = new FilterInfoCollection(FilterCategory.VideoInputDevice);
//comboBox1.Items.Clear();
if (videoDevices.Count == 0)
throw new ApplicationException();
DeviceExist = true;
foreach (FilterInfo device in videoDevices)
{
//comboBox1.Items.Add(device.Name);
result = device.Name;
return result;
}
//comboBox1.SelectedIndex = 0; //make dafault to first cam
}
catch (ApplicationException)
{
DeviceExist = false;
//comboBox1.Items.Add("No capture device on your system");
return "No capture device on your system";
}
return result;
}
// and my client side...
private void timerWebCam_Tick(object sender, EventArgs e)
{
//lblFPS.Text ="Device Running... " + remObj.getFPS() + " FPS";
pictureBox1.Image = remObj.lastImg;
}