I am using Xamarin Forms 4.1 (android and ios) and am trying to load an image (png) from the respective asset folders (i.e. resources/drawable on android) into an SKBitmap.
I can load with no problem from the shared folder, (like so)
Assembly assembly = GetType().GetTypeInfo().Assembly;
string resourceID = "PROJECTNAME.Images.image.png";
using (Stream stream = assembly.GetManifestResourceStream(resourceID))
{
SKBitmapObj = SKBitmap.Decode(stream);
}
but would like to do so from the platform folders as the images are used in XAML elsewhere as well.
I have attempted to first load the image into an FFImageLoading CachedImage, and then get the bytes to decode into the SKBitmap, but likewise I seem unable to load a platform image in code.
FFImageLoading.Forms.CachedImage cachedImage =
new CachedImage() { Source = "imagename" };
SKBitampObj = SKBitmap.Decode(cachedImage.GetImageAsPngAsync(60, 60).result);
CachedImages display fine when I do so in XAML, so I assume I am just addressing the image incorrectly, but am not sure.
Related
I implemented a application for Sunmi T1 mini device in-build printer in Xamarin forms and i want to print a image with some text like billing receipt.
I integrated AIDL file for Sunmi T1 mini device you can see in image.
But i am facing namespacing issue in IWoyouService.cs "the type of namespace name 'BitmapStub' does not exist in the namespace 'Android.Graphics'."
case TransactionPrintBitmap: {
data.EnforceInterface (descriptor);
Android.Graphics.Bitmap arg0 = default (Android.Graphics.Bitmap);
arg0 = Android.Graphics.BitmapStub.AsInterface (data.ReadStrongBinder ());
ICallback arg1 = default (ICallback);
arg1 = ICallbackStub.AsInterface (data.ReadStrongBinder ());
this.PrintBitmap (arg0, arg1);
reply.WriteNoException ();
return true;
}
I attach my AIDL Zip file https://drive.google.com/file/d/1lrCgZwDrfyqs6LAwTP3pQ6nMzYIW4hrY/view?usp=sharing.
How can resolve this error in Xamarin.Forms
I had this exact same problem, and managed to solve it by adding another AIDL file to define what a 'Bitmap' is.
I copied this file from the Android Open Source Project and just added it into my project and set the build action to Android Interface Definition like the other Sunmi AIDL files.
Not sure why Xamarin doesn't manage to handle this automatically, but adding this solved the problem for me and I was able to build and successfully invoke the interface methods that accept bitmap parameters.
In case the link ever goes bad, here is the entire file you need to add - it's very small:
/* Save this in Bitmap.aidl and add to your project alongside the others */
package android.graphics;
parcelable Bitmap;
I am new to Ubuntu & Qt. I need to show busy status for other long operations. So, I was just trying to use waiting animation gif files to load instead using Progress bars.
I am using Eclipse Editor for Qt project.
Trolltech/../imageformat folder contains libqgif.so and libqgif.so.debug. I have copied these files in my debug folder too.
loader.gif is added in qrc file and kept in /Resources folder
IN MainWindow class I have added label and after setupUi(this) been called I call my ShowMovie() function as below:
ShowMovie() {
QMovie *movie = NULL;
movie = new QMovie(":/Resources/loader.gif");
if(movie->isValid()) {
ui.label_3->setMovie(movie);
movie->start();
}
else
qDebug()<<"Movie is Invalid";
qDebug()<<QImageReader::supportedImageFormats ();
}
Always isValid() function returns false & I got message that Movie is Invalid.
Last qDebug() returns
("bmp", "gif", "ico", "jpeg", "jpg", "mng", "pbm", "pgm", "png", "ppm",
"svg", "svgz", "tif", "tiff", "xbm", "xpm")
i.e means gif support is available.
I have tried to call ShowMovie() function before loading Main UI and/or on button clicked. Both fails.
Provide help on what is to be corrected.
Thank you.
you don't need to copy librairies files *.so.
Try creating the movie object with the full path to loader.gif. Does it work?
Then you have not setup correctly your resource system.
Either you have a syntax mistake in the qrc file which need to be fixed or you forgot to add it as a resource in the project file (.pro) using
RESOURCES = myqresource.qrc
I have been struggling with this issue for some time now.
I have a web interface where I create projects, with this you should be able to upload multiple documents to the server, which is attached to the project they belong to.
So far I made it work with only uploading one file at a time.
My idea was maybe to add the "file" objects in an arralylist and then bind it to a gridview and then upload it to the server?
I know this sound a bit confusing, but I'm confused also!
This is how my method look like when I upload a single file to the server and also save the file's ID, name and context in the database:
File file = new File();
Projects_Overview po = new Projects_Overview();
po.Name = TextBoxName.Text;
po.Time = time;
po.Owner = TextBoxOwner.Text;
po.Responsibility = TextBoxResp.Text;
po.Created = datecreate;
po.StartDate = datestart;
po.FinishDate = datefinish;
po.ETC = dateETC;
po.Description = TextBoxDesc.Text;
po.Comments = TextBoxComments.Text;
po.Remember = TextBoxRemember.Text;
ie.Projects_Overview.AddObject(po);
ie.SaveChanges();
if (uploadFile.HasFile)
{
string filepath = uploadFile.PostedFile.FileName;
string fileName = Path.GetFileName(filepath);
file.Context = Path.GetFileNameWithoutExtension(uploadFile.PostedFile.FileName);
file.Extension = Path.GetExtension(uploadFile.PostedFile.FileName).Replace(".", "").Substring(0, 4);
file.FileName = Guid.NewGuid();
string fileSavePath = Server.MapPath("") + "\\Wordfiles\\" + Convert.ToString(file.FileName) + ".upl";
uploadFile.PostedFile.SaveAs(fileSavePath);
file.ProjectID = po.ID;
ie.File.AddObject(file);
ie.SaveChanges();
Can someone tell me how to "attach" multiple files and then save them in the folder along with the other data as I posted above?
Cheers
I believe that HTML 5 has the built-in capability to handle multi-file uploads (where HTML4 does not), but I have not worked with HTML5 yet. With HTML4, you must use an external control (typically either javascript or flash), as there is no built-in mechanism to allow multi-file uploads.
I did write a multi file upload page that works with HTML4 or HTML5 utilizing PLupload (an external control) to perform the file picking. I had to find a generic file handler to interface the control to the .aspx upload page. I think that I found that here.
It took a couple hours to implement, but it's worked great.
I have 2 different project. One is supposed to upload images (admin) and the other is supposed to show them.
I was writing something like "/Contents/images/image path"... But wait! I will I upload the images from the application into that address?
Any help and suggestions please.
If you have two applications that will interact with the same files, it's probably better to have an ImageController with an action that allows you to upload/download the image rather than storing them directly as content. That way both applications can reference the same file location or images stored in a database and manipulate them. Your download action would simply use a FileContentResult to deliver the bytes from the file. You can derive the content type from the file extension.
Example using a database. Note that I assume that the database table contains the content type as determined at upload time. You could also use a hybrid approach that stores the image metadata in a database and loads the actual file from a file store.
public class ImageController : Controller
{
public ActionResult Get( int id )
{
var context = new MyDataContext();
var image = context.Images.SingleOrDefault( i => i.ID == id );
if (image != null)
{
return File( image.Content, image.ContentType );
}
// or you could return a placeholder image here if appropriate.
throw new HttpException( 404, "The image does not exist" );
}
}
An alternative would be to incorporate your administrative interface in an area of the same application rather than in a separate project. This way you could reuse the content/images directory if you wanted. I find that when you have dynamic images the database or a hybrid approach works better from a programming perspective since it's more consistent with the rest of your data model.
you could try like this..
Let's assume that all of your images are in Project A and you want to use the same images in Project B.
Open Project B with Visual Studio. In the Solution Explorer, right click your Project Name and select "Add Existing Item...".
Browse to the physical location on disc where your images in Project A are stored and select the files that you want to import.
You'll then be able to access those images from project A in Project B.
I'm giving users the ability to upload an image to my Air app, then displaying this image in an image control. But I need to allow for PDF uploading in the same manner, so I need to convert the PDF to an image. I only care about the first page of the PDF they upload for now.
What I'm doing is:
1) User browses for a file with the file reference control
2) User chooses the image or PDF to upload
3) I encode said image to base64 and store it
4) I then load from that base64 with something like:
public function decodeImage(b64String:String):void{
var decoder:Base64Decoder = new Base64Decoder();
decoder.decode(b64String);
var imgLoader:Loader = new Loader();
imgLoader.loadBytes(decoder.toByteArray());
imgLoader.contentLoaderInfo.addEventListener(Event.COMPLETE,decodedImageLoaded);
}
private function decodedImageLoaded(event:Event):void{
var imgLoader:Loader = (event.target as LoaderInfo).loader;
var bmp:Bitmap = Bitmap(imgLoader.content);
imgLoader.removeEventListener(Event.COMPLETE, decodedImageLoaded);
var img:Image = new Image();
img.source = bmp;
this.addChild(img);
}
This method is working great for .gif, .jpg, and .png. At some point in my process, probably the initial upload I need to convert the first page of a PDF to a png so that I can use the rest of this process.
I welcome any ideas with the sole requirement being that it has to be a part of the Air app, I can't use something like ImageMagick that runs on a server, but I could use a component that I can compile in to the finished product.
I believe AlivePDF for Flash now has capabilities to read a PDF file. You might try PurePDF, as well. You could potentially use ones of these to get that desired page and convert it to an image.
Have you seen swftools? It has the ability to convert a PDF to a SWF, PNG, JPG, etc...