How can I create a Windows.Storage.StorageFile from a picture in Camera Roll for windows phone 8.1? I have tried the follwing:-
try{
Windows.Storage.StorageFolder folder = Windows.Storage.KnownFolders.CameraRoll;
Windows.Storage.StorageFile file = await folder.GetFileAsync(filename);
}
catch(Exception exc)
{
MessageBox.Show(exc.Message);
}
Which is producing an Access Violation Exception.
Can someone plz tell me how to do it in windows phone 8.1?
First, you may need to declare the capability in the package.appxmanifest.
Once you’ve done this you can now use the Windows.Storage.KnownFolders class to access the Picture Library.
Here is how to get to the camera roll, you can refer to.
public async Task<IEnumerable<StorageFile>> GetFilesInCameraRoll()
{
var cameraRoll = await KnownFolders.PicturesLibrary.GetFolderAsync("Camera Roll");
return await cameraRoll.GetFilesAsync();
}
More detailed information, you can refer to Access Camera Roll in Windows Phone 8.1
Related
I want to launch my app from another app in the Windows Phone 8.1 environment. I followed the instructions in MSDN, but I cannot figure out how to call the first app from the second. This is the protocol I added in the first app's manifest file:
<Extensions>
<Extension Category="windows.protocol">
<Protocol Name="myapp">
<Logo>Assets\SmallLogo.scale-240.png</Logo>
<DisplayName>my App 1</DisplayName>
</Protocol>
</Extension>
</Extensions>
This is my call from the second app, that does absolutely nothing:
private async void btn_Click(object sender, RoutedEventArgs e)
{
await Windows.System.Launcher.LaunchUriAsync(new System.Uri("myapp:"));
}
Follow the steps in Auto-launching apps using file and URI associations for Windows Phone 8
And you have use use a class which is derived from UriMapperBase to handle the navigation and have to set it as RootFrame.UriMapper in the App.xaml.cs
private void InitializePhoneApplication()
{
if (phoneApplicationInitialized)
return;
// Create the frame but don't set it as RootVisual yet; this allows the splash
// screen to remain active until the application is ready to render.
RootFrame = new PhoneApplicationFrame();
RootFrame.Navigated += CompleteInitializePhoneApplication;
// Assign the URI-mapper class to the application frame.
RootFrame.UriMapper = new AssociationUriMapper();
******
}
I have followed this tutorial on setting up Parse push notification in a Windows Phone app. This is my code:
public App() {
// Global handler for uncaught exceptions.
UnhandledException += Application_UnhandledException;
// Standard XAML initialization
InitializeComponent();
// Phone-specific initialization
InitializePhoneApplication();
// Language display initialization
InitializeLanguage();
// Show graphics profiling information while debugging.
if (Debugger.IsAttached) {
// Display the current frame rate counters.
Application.Current.Host.Settings.EnableFrameRateCounter = true;
// Show the areas of the app that are being redrawn in each frame.
//Application.Current.Host.Settings.EnableRedrawRegions = true;
// Enable non-production analysis visualization mode,
// which shows areas of a page that are handed off to GPU with a colored overlay.
//Application.Current.Host.Settings.EnableCacheVisualization = true;
// Prevent the screen from turning off while under the debugger by disabling
// the application's idle detection.
// Caution:- Use this under debug mode only. Application that disables user idle detection will continue to run
// and consume battery power when the user is not using the phone.
PhoneApplicationService.Current.UserIdleDetectionMode = IdleDetectionMode.Disabled;
}
// Initialize the Parse client with your Application ID and .NET Key found on
// your Parse dashboard
ParseClient.Initialize("grpTmrClet8K35yeXg2HQKK8wl59VeC9ijH0I0dn", "os8EfSFq9maPBtDJ91Mq0xnWme8fLANhttTPAqKu");
// After calling ParseClient.Initialize():
this.Startup += async (sender, args) =>
{
// This optional line tracks statistics around app opens, including push effectiveness:
ParseAnalytics.TrackAppOpens(RootFrame);
// By convention, the empty string is considered a "Broadcast" channel
// Note that we had to add "async" to the definition to use the await keyword
await ParsePush.SubscribeAsync("testchannel");
};
}
// Code to execute when the application is launching (eg, from Start)
// This code will not execute when the application is reactivated
private async void Application_Launching(object sender, LaunchingEventArgs e) {
await ParseAnalytics.TrackAppOpenedAsync();
}
When I send a push notification from the Parse dashboard it doesn't get received. I have tried running both on the emulator (Windows Phone 8.0) and device (8.1), with app in foreground, background and closed with the same negative result.
When I use a channel like "testchannel" above and use the segment options, the channel name appears in the dropdown list of options indicating that the app is at least connecting Parse, but it just wont receive the notifications.
Hope someone can help me identify what I am missing. Thanks in advance.
If you are developing a Windows Phone 8.1 app, make sure you've enabled toast notification in the manifest file.
I don't quite understand everything about Parse just yet, but this is what works for me.
In App.xaml.cs:
public App()
{
this.InitializeComponent();
this.Suspending += this.OnSuspending;
ParseClient.Initialize("wSjuNTbtjVLRaedXvOoaf9S5cTbkuQohTulNZ2vS", "nWZMhXRet9Wotlgikb9aUdKf5GFtRiMvduw7w68z");
}
We subscribe and enable analytics OnLaunched:
protected async override void OnLaunched(LaunchActivatedEventArgs e)
//Generated codes go here
await ParsePush.SubscribeAsync("testchannel");
await ParseAnalytics.TrackAppOpenedAsync();
That would simply do the trick. You should modify the code according to your needs. Hope this helps.
I am new to windows phone platform.Is there anything available like logcat in android for windows for collecting logs?Thanks in advance.
Windows 8.1 introduced new classes to simplify logging. These classes are LoggingChannel, LoggingSession and others.
Here's an example:
App.xaml.cs
LoggingSession logSession;
LoggingChannel logChannel;
public App()
{
this.InitializeComponent();
this.UnhandledException += App_UnhandledException;
}
void App_UnhandledException(object sender, UnhandledExceptionEventArgs e)
{
logChannel.LogMessage("Unhandled exception: " + e.Message);
logSession.SaveToFileAsync(Windows.Storage.ApplicationData.Current.LocalFolder, "MainLog.log").AsTask().Wait();
}
protected override void OnLaunched(LaunchActivatedEventArgs e)
{
logSession = new LoggingSession("MainLogSession");
Resources["MainLogSession"] = logSession;
logChannel = new LoggingChannel("AppLogChannel");
logSession.AddLoggingChannel(logChannel);
}
MainPage.xaml.cs
LoggingChannel logChannel;
public MainPage()
{
this.InitializeComponent();
var logSession = (LoggingSession)Application.Current.Resources["MainLogSession"];
logChannel = new LoggingChannel("MainPageLogChannel");
logSession.AddLoggingChannel(logChannel);
logChannel.LogMessage("MainPage ctor", LoggingLevel.Information);
}
I highly recommend watching the Making your Windows Store Apps More Reliable keynote during the 2013 build conference, where Harry Pierson demonstrates these new APIs in more detail (including uploading the log file to a backend server using a background task that gets executed when the phone is connected to AC power).
You can use System.Diagnostics.Debug to view the logs on Visual Studio Console Window but you won't be able to collect them later because it's only shown during debug.
I recommend the use of MetroLog, a lightweight logging system designed specifically for Windows Store and Windows Phone apps.
You can install it using NuGet
Install-Package MetroLog
Here's an quick example:
using MetroLog;
using MetroLog.Targets;
LogManagerFactory.DefaultConfiguration.AddTarget(LogLevel.Trace, LogLevel.Fatal, new FileStreamingTarget());
GlobalCrashHandler.Configure();
ILogger log = LogManagerFactory.DefaultLogManager.GetLogger<MainPage>();
log.Trace("This is a trace message.");
You can find a tutorial explaining how to add it on your project at http://talkitbr.com/2015/06/11/adicionando-logs-em-universal-apps. Also there is an explanation regarding retrieving these logs.
At start I'm sorry for my English is poor. And this is the only place where i solved the problem.
I have a problem with my application. I write and test it on emulator in VisualStudnio 2012 and It work fine. But when I add aplication in WindowsPhone store and I get to phone. It crashed. I think that problem is in geolocator or something with GPS, because when i use function where my it don't use gps it work. Everywhere where i use geolocator_geopositionchanged it break down and app is terminate. in one of application page i use map control but i gave token and application id but only in class where i use map.
private void maping_Loaded(object sender, RoutedEventArgs e)
{
Microsoft.Phone.Maps.MapsSettings.ApplicationContext.ApplicationId = "id";
Microsoft.Phone.Maps.MapsSettings.ApplicationContext.AuthenticationToken = "token";
}
Do you have any sugestion or advices?
if you want watching app there is a link
http://www.windowsphone.com/pl-PL/store/app/opencaching/06bce1e1-16ef-4ebf-ac53-23b4c725f78b
I have geolocator in a few class it's one of them
Geolocator code
if (!tracking)
{
gps = new Geolocator();
gps.DesiredAccuracy = PositionAccuracy.High;
gps.ReportInterval = 100;
gps.PositionChanged += geolocator_PositionChanged;
}
else
{
gps.PositionChanged -= geolocator_PositionChanged;
gps = null;
}
tracking = !tracking;
Geoposition changed code
void geolocator_PositionChanged(Geolocator sender, PositionChangedEventArgs args)
{
double distance = 0;
distance = point.GetDistanceTo(new GeoCoordinate(args.Position.Coordinate.Latitude, args.Position.Coordinate.Longitude));
string asa = Convert.ToInt64(distance).ToString();
if (asa != null)
{
Dispatcher.BeginInvoke(() =>
{
TBodleglosc.Text = asa +"m";
navi.Rotation = 180 + Kierunek(point.Latitude, point.Longitude, args.Position.Coordinate.Latitude, args.Position.Coordinate.Longitude);
});
}
}
Debug on your device. If that cannot repro, setup a Beta Test app and use that to distribute the app back to yourself for debugging. Sometimes signing breaks things.
I debug at lumia 920 and I have a problem with convert.toDouble
because there are was , i have . and vice versa
I think that it's connected with phone language
because in english emulator and Ertay Shashko phone who debug it yesterday it's working fine.
At now application work at phone but doesn't at emulator.
but if i change settings on location and language apps work but I can't debug because visual studio have error
It's weird .....
I want in app purchasing in my Windows Phone 8 app. I published my app as beta and also 3 products for this app that u can buy. I copied my ID from Dev Center in Visual Studio 2013. Now I want to test it.
The Problem is when I click on this button:
private async void buttonInfo_Click(object sender, RoutedEventArgs e)
{
StringBuilder sb = new StringBuilder();
var listing = await CurrentApp.LoadListingInformationAsync();
foreach (var product in listing.ProductListings)
{
sb.AppendLine(string.Format("{0}, {1}, {2},{3}, {4}",
product.Key,
product.Value.Name,
product.Value.FormattedPrice,
product.Value.ProductType,
product.Value.Description));
}
MessageBox.Show(sb.ToString(), "List all products", MessageBoxButton.OK);
}
Then the messageBox appears but has no Content. Why not?
You can just debug on it.. make sure
await CurrentApp.LoadListingInformationAsync()
returns the result you expected
It was fixed after a day. no changes in code. xD maybe Servers were not ready