Xamarin Forms Android crashes while taking photo without exception. But this happens in like 65% of tries. Sometimes app doesn't crash and I can take photo normally. On other phone(same model) application crashes every time I want to take photo.
I'm using https://github.com/jamesmontemagno/MediaPlugin like this:
if (!CrossMedia.Current.IsCameraAvailable)
{
DisplayAlert("No Camera", ":( No camera avaialble.", "OK");
return;
}
var file = await CrossMedia.Current.TakePhotoAsync(new Plugin.Media.Abstractions.StoreCameraMediaOptions
{
Directory = "Sample",
Name = "testPO.jpg"
});
if (file == null)
return;
DisplayAlert("File Location", file.Path, "OK");
Camera loads without problem, but when I press "Take photo" button application crashes and debugging in Visual Studio stops without any exception.
Thank you for any help.
I realize this is old but in case someone stumbles across this issue in the future:
I've had this issue and it ended up being the NoHistory flag in MainActivity.cs being set to true.
Remove NoHistory = true or set NoHistory = false to avoid the crash.
eg:
[Activity(Label = "MyApp", Icon = "#mipmap/icon", Theme = "#style/MainTheme", ScreenOrientation = ScreenOrientation.Portrait, ConfigurationChanges = ConfigChanges.ScreenSize | ConfigChanges.Orientation, NoHistory = false)]
public class MainActivity : FormsAppCompatActivity {
//...
}
Related
I have UWP Windows application, developed under the Xamarin.forms. I have implemented the Toast notifications but I am facing the issue with this. In some Windows 10 systems, it is working and showing the toast notification properly, but in some of the Windows 10 systems (even having the same Windows 10 OS update) it is not working.
Below first code snippets that I have implemented in the Native UWP.
string msg = "Toast Notification Header";
string subMsg = "Toast Notification Title";
var toastXml = ToastNotificationManager.GetTemplateContent(ToastTemplateType.ToastText02);
var toastTextElements = toastXml.GetElementsByTagName("text");
toastTextElements[0].AppendChild(toastXml.CreateTextNode(msg));
toastTextElements[1].AppendChild(toastXml.CreateTextNode(subMsg));
//To play the custom sound
var toastNode = toastXml.SelectSingleNode("/toast");
var audio = toastXml.CreateElement("audio");
audio.SetAttribute("src", "ms-appx:///Assets/incoming_message.wav");
audio.SetAttribute("loop", "false");
toastNode.AppendChild(audio);
var toast = new ToastNotification(toastXml);
ToastNotificationManager.CreateToastNotifier().Show(toast);
Below second code snippets that I have implemented in the Native UWP.
// "With Microsoft.Toolkit.Uwp.Notifications"
// Construct the toast content
ToastContent toastContent = new ToastContent()
{
Visual = new ToastVisual()
{
BindingGeneric = new ToastBindingGeneric()
{
Children =
{
new AdaptiveText()
{
Text = "Toast Notification Header"
},
new AdaptiveText()
{
Text = "Toast Notification Content"
}
}
}
}
};
bool supportsCustomAudio = true;
// If we're running on Desktop before Version 1511, do NOT include custom audio
// since it was not supported until Version 1511, and would result in a silent toast.
if (AnalyticsInfo.VersionInfo.DeviceFamily.Equals("Windows.Desktop")
&& !ApiInformation.IsApiContractPresent("Windows.Foundation.UniversalApiContract", 2))
{
supportsCustomAudio = false;
}
if (supportsCustomAudio)
{
toastContent.Audio = new ToastAudio()
{
Src = new Uri("ms-appx:///Assets/incoming_message.wav")
};
}
// And create the toast notification
ToastNotification notification = new ToastNotification(toastContent.GetXml());
// And then send the toast
ToastNotificationManager.CreateToastNotifier().Show(notification);
Above code snips showing the Toast notification in some Windows 10 system and not working in some other Windows 10 system.
Kindly guide me on this. Thanks in advance.
Regards,
Vivek
Please follow these steps to add toast notification in UWP Project.
Step 1:- Create a new UWP project.
Step 2:- Go to the code-behind and add the namespace.
using Windows.UI.Notifications;
using
NotificationsExtensions.Toasts;
Step 3:- I created a Toast Generic Template like the following code:
public static Windows.Data.Xml.Dom.XmlDocument CreateToast()
{
var xDoc = new XDocument(
new XElement("toast",
new XElement("visual",
new XElement("binding", new XAttribute("template", "ToastGeneric"),
new XElement("text", "C# Corner"),
new XElement("text", "Do you got MVP award?")
)
),// actions
new XElement("actions",
new XElement("action", new XAttribute("activationType", "background"),
new XAttribute("content", "Yes"), new XAttribute("arguments", "yes")),
new XElement("action", new XAttribute("activationType", "background"),
new XAttribute("content", "No"), new XAttribute("arguments", "no"))
)
)
);
var xmlDoc = new Windows.Data.Xml.Dom.XmlDocument();
xmlDoc.LoadXml(xDoc.ToString());
return xmlDoc;
}
Step 4:- Create a toast notification object using XML document.
var xmdock = CreateToast();
var toast = new ToastNotification(xmdock);
Next show the toast using ToastNotificationManager class.
var notifi = Windows.UI.Notifications.ToastNotificationManager.CreateToastNotifier();
notifi.Show(toast);
Step 5:- C# code-behind:
private void showToastBtn_Click(object sender, RoutedEventArgs e)
{
var xmdock = CreateToast();
var toast = new ToastNotification(xmdock);
var notifi = Windows.UI.Notifications.ToastNotificationManager.CreateToastNotifier();
notifi.Show(toast);
}
I hope the above code will be useful for you.
Thank you
I am developing a xamarin forms application which access device camera and gallery to take pictures. I am using the following code
CrossMedia.Current.TakePhotoAsync(new StoreCameraMediaOptions
{
SaveToAlbum = true,
Name = string.Format(TDJGolfConstants.ProfileImageName, Guid.NewGuid()),
//AllowCropping = true,
//CompressionQuality = 60,
PhotoSize= PhotoSize.Medium,
But it is not asking the user for permission , and directly opens the camera and gallery. Is there anything to add for asking permisision?
I use CrossPermissions from the PermissionsPlugin for this
var status = await CrossPermissions.Current.CheckPermissionStatusAsync(Permission.Camera);
if (status != PermissionStatus.Granted)
{
if (await CrossPermissions.Current.ShouldShowRequestPermissionRationaleAsync(Permission.Camera))
{
await UserNotificationService.Current.Show("Camera required", "justification");
}
var results = await CrossPermissions.Current.RequestPermissionsAsync(Permission.Camera);
I am picking a photo from photo library and i get the following
AlbumPath:
assets-library://asset/asset.JPG?id=106E99A1-4F6A-45A2-B320-B0AD4A8E8473&ext=JPG
Path:
/Users/myname/Library/Developer/CoreSimulator/Devices/21CB035B-A738-4F74-B121-2DB2A6B5372A/data/Containers/Data/Application/3081A323-98AF-4EF6-95B9-29D4C2CD8425/Documents/temp/IMG_20170408_111143.jpg
How do i assign this image to a button ? I tried the following.
var file = await CrossMedia.Current.PickPhotoAsync(
new Plugin.Media.Abstractions.PickMediaOptions
{
});
Button btn = new Button();
btn.Image = (Xamarin.Forms.FileImageSource)ImageSource.FromFile(file.Path);
No image is displayed on the button. Any help help is appreciated.
Thank you.
Once you deploy the application the app will not have access to your mac. For the application to use the picture it will need to be a bundled resource within the iOS application. Below is a simple example of using images within an iOS app. You'll definitely want to consider just adding a gesture listener to your image instead of making it a button though. If you try to just use the image on a button you'll have to do some styling adjustments to get it to look clean.
Image Setup
Put image in iOS Resource folder
Make sure bundledresource is selected from image properties.
Image Button
public class ImageButton : ContentPage
{
private Button _imageBtn = new Button { Image = "icon.png", Text = "Sample button" };
public ImageButton()
{
Content = new StackLayout
{
Children =
{
_imageBtn
}
};
}
}
Image with TapGesture
public class ImageButton : ContentPage
{
private Image _imageBtn = new Image { Source = "icon.png" };
private TapGestureRecognizer _imageTap = new TapGestureRecognizer();
public ImageButton()
{
_imageBtn.GestureRecognizers.Add(_imageTap);
Content = new StackLayout
{
Children =
{
_imageBtn
}
};
_imageTap.Tapped += (s, e) =>
{
// handle the tap
};
}
}
I am learning Xamarin.Forms with Visual Studio 2015 on a Windows 10 machine. When I create a Xamarin.Forms(Android/iOS) cross-platform project and start the AVD, the emulator works, but the application does not open. I don't receive errors in Visual Studio.
It's just a test:
public App()
{
// The root page of your application
MainPage = new ContentPage
{
Content = new StackLayout
{
VerticalOptions = LayoutOptions.Center,
Children = {
new Label {
HorizontalTextAlignment = TextAlignment.Center,
Text = "Welcome to Xamarin Forms!"
}
}
}
};
}
After a lot of effort i update my android sdk tools and all starts work again, thx everyone. Version 25.2.3.
I'm using the IMediaPicker lines to open gallery and pick an image:
using XLabs.Platform.Services.Media;
using XLabs.Platform.Device;
using XLabs.Ioc;
using Xamarin.Forms;
private async Task<string> pickImage(){
var device = Resolver.Resolve<IDevice>();
IMediaPicker mediaPicker = DependencyService.Get<IMediaPicker>() ?? device.MediaPicker;
if (mediaPicker == null)
throw new NullReferenceException("Media picker initialize error");
string ImageSource = null;
try
{
if (mediaPicker.IsPhotosSupported)
{
var mediaFile = await mediaPicker.SelectPhotoAsync(new CameraMediaStorageOptions
{
MaxPixelDimension = 400
});
ImageSource = mediaFile.Path;
}
}
catch (System.Exception)
{
}
return ImageSource;
}
However when I trigger the function in iPad it look like this:
The gallery only shows up as the size of an iPhone4 and there seems to be no where to change the frame or size. All I want is to display a full screen for it.
It worked well in android tablets.
Is there a work around?