I am trying to set the seekbar thumb using code not XML
I tried
Drawable a = null;
a = Drawable.CreateFromStream(Assets.Open("Drawable/Icon"),null);
seekBar.SetThumb (a);
also tried:
seekBar.SetThumb() //Adding the image path but it said the it requires a drawable but it was giving it a int
how can i use set the image with code?
also i am using Xamarin free version.
I had the same issue and I solved it with the following code.
Hope it helps
public void seek_bar_ProgressChanged(object sender, SeekBar.ProgressChangedEventArgs e) {
Bitmap img = BitmapFactory.DecodeResource(Resources, Resource.Drawable.yellobar);
Drawable d = new BitmapDrawable(Resources, img);
seek_bar.ProgressDrawable = d;
}
I'm new to working with PdfBox and I'm having a small issue when displaying images. I'm able to import the image, which is sized at 800*900 pixels, and looks fine when viewed in an existing pdf at 100%. However when the resulting PDF is generated using the below code, the image becomes blurry, and the image extends beyond the boundaries of the A4 page.
Is there a different way of sizing/saving images so that they display correctly in pdfbox?
public class PDFtest {
/**
* #param args the command line arguments
*/
public static void main(String[] args) throws IOException, COSVisitorException {
// TODO code application logic here
// Create a document and add a page to it
PDDocument document = new PDDocument();
PDPage page = new PDPage(PDPage.PAGE_SIZE_A4);
document.addPage(page);
// Create a new font object selecting one of the PDF base fonts
PDFont font = PDType1Font.HELVETICA_BOLD;
InputStream in = new FileInputStream(new File("img.jpg"));
PDJpeg img = new PDJpeg(document, in);
// Start a new content stream which will "hold" the to be created content
PDPageContentStream contentStream = new PDPageContentStream(document, page);
// Define a text content stream using the selected font, moving the cursor and drawing the text "Hello World"
contentStream.drawImage(img, 10, 700);
contentStream.beginText();
contentStream.setFont(font, 12);
contentStream.moveTextPositionByAmount(10, 650);
contentStream.drawString("Hello World");
contentStream.endText();
// Make sure that the content stream is closed:
contentStream.close();
// Save the results and ensure that the document is properly closed:
document.save("Hello World.pdf");
document.close();
}
I'd like to point out that as of 2.0 the contentStream.drawXObject function call in Victor's answer is deprecated. If you want to specify a width and height you should use contentStream.drawImage(image, x, y, width, height)
I had the same problem asked in this question, but the given answer is not right.
After some research I found a solution.
Instead of using the function drawImage use the function drawXObject
contentStream.drawXObject( img, 10, 700, 100, 100 );
Where the last two numbers specify the size of the image to be drawn.
For similar situation, for me, with PDF 2.0.11 and a tiff file of dimensions - 1600 x 2100 the following code perfectly fit the image in A4 (portrait) size. Not sure if PDFRectangle is okay with you.
I got this example straight from PDFBOX - Example
The only thing I tweaked/introduced is:
PDRectangle.A4.getWidth(), PDRectangle.A4.getHeight()
Here is the full sample:
public static void main(String[] args) throws IOException
{
// if (args.length != 2)
// {
// System.err.println("usage: " + ImageToPDF.class.getName() + " <image> <output-file>");
// System.exit(1);
// }
String imagePath = "C:/FAX/sample.tiff";
String pdfPath = "C:/FAX/sample.pdf";
if (!pdfPath.endsWith(".pdf"))
{
System.err.println("Last argument must be the destination .pdf file");
System.exit(1);
}
try (PDDocument doc = new PDDocument())
{
PDPage page = new PDPage();
doc.addPage(page);
// createFromFile is the easiest way with an image file
// if you already have the image in a BufferedImage,
// call LosslessFactory.createFromImage() instead
PDImageXObject pdImage = PDImageXObject.createFromFile(imagePath, doc);
// draw the image at full size at (x=20, y=20)
try (PDPageContentStream contents = new PDPageContentStream(doc, page))
{
// draw the image at full size at (x=20, y=20)
contents.drawImage(pdImage, 0, 0, PDRectangle.A4.getWidth(), PDRectangle.A4.getHeight());
// to draw the image at half size at (x=20, y=20) use
// contents.drawImage(pdImage, 20, 20, pdImage.getWidth() / 2, pdImage.getHeight() / 2);
}
doc.save(pdfPath);
System.out.println("Tiff converted to PDF succussfully..!");
}
}
Hope it helps.
If your intention is an A4 sized pic on a PDF, then i guess you find the actual size of typical A4 in pixels.
Also you should be aware of the extension of the picture that you want to view like jpg, gif, or bmp ...
from what I saw in your code, the dimensions of the picture are 10 X 700 which I believe is pretty small size.
contentStream.drawImage(img, 10, 700);
And the extension of the picture is : jpg
InputStream in = new FileInputStream(new File("img.jpg"));
check those and return for more info.
that's all.
good luck'''
As per the new API 2.0.x, one can use the PDRectangle to fetch Pdf page width and height. One can use PDPageContentStream to draw the image in accordance with PDF page.
For reference:
try (PDPageContentStream contents = new PDPageContentStream(pdDocument, pdPage)) {
final PDRectangle mediaBox = pdPage.getMediaBox();
final PDImageXObject pdImage = PDImageXObject.createFromFile(image, pdDocument);
contents.drawImage(pdImage, 0, 0, mediaBox.getWidth(), mediaBox.getHeight());
}
I want to save a image to file and the documentation mentions ImageExportFormat method: Chart1.getExport().getImage().getJPEG().save(javax.imageio.stream.ImageOutputStream ios)
Doco: http://www.steema.com/files/public/teechart/java/v1/docs/JavaDoc/com/steema/teechart/exports/ImageExportFormat.html
This method is not recognised by my code. Has this been removed ? Is there an alternate way I can do this via a stream?
Regards, Clayton
The example below shows how to export to a jpeg file in Swing. A stream could be used natively instead of using ‘File’.
public void save() throws IOException {
Image img = chart1.image(chart1.getWidth(), chart1.getHeight());
RenderedImage rendImage = (RenderedImage) img;
Iterator iter = ImageIO.getImageWritersByFormatName("jpg");
File outfile = new File("c:\\output\\testjavaChart.jpg");
ImageOutputStream ios = ImageIO.createImageOutputStream(outfile);
ImageWriter writer = (ImageWriter) iter.next();
ImageWriteParam format = new javax.imageio.plugins.jpeg.JPEGImageWriteParam(java.util.Locale.getDefault());
writer.setOutput(ios);
// Write the image
writer.write(null, new IIOImage(rendImage, null, null), format);
// Cleanup
ios.flush();
ios.close();
writer.dispose();
}
If you are using SWT, don't hesitate to let us know.
I am trying to store an image into isolated storage by using a button event handler.however when I click the "save" button, theres a null reference error which it could not get the image to store into isolated storage.Someone help me please.Urgent
Below are my sample code :
private void btnSave_Click(object sender, RoutedEventArgs e)
{
String tempJPEG = "TempJPEG";
var myStore = IsolatedStorageFile.GetUserStoreForApplication();
if (myStore.FileExists(tempJPEG))
{
myStore.DeleteFile(tempJPEG);
}
IsolatedStorageFileStream myFileStream = myStore.CreateFile(tempJPEG);
StreamResourceInfo sri = null;
Uri uri = new Uri("TestImage.jpg", UriKind.Relative);
sri = Application.GetResourceStream(uri);
BitmapImage bitmap = new BitmapImage();
bitmap.CreateOptions = BitmapCreateOptions.None;
bitmap.SetSource(sri.Stream);
WriteableBitmap wb = new WriteableBitmap(bitmap);
Extensions.SaveJpeg(wb, myFileStream, wb.PixelWidth, wb.PixelHeight, 0, 85);
myFileStream.Close();
Personally, I always like to add error handling to check and see if I got the object I expected to get. You can either recover from the situation or wrap your exception in a more descriptive exception. This will yield long term benefits in your code and identify your near term problem. That would be my suggestion.
I cant see anything obviously wrong. Where exactly does it fall over? My advice would be to stick a breakpoint in and step through line by line and inspect any elements you think might be causing the problem.
I'm trying to ascertain wither there is a limitation on the camera access in the j2me implementation on the HTC Touch2. The native camera is 3MP however it seams that the quality is notably reduced when accessed via j2me, in fact it seams that the only size and format the .getSnapshot() method is able to return is a 240x320 pixel jpeg. I'm trying to confirm that this is a limitation if the j2me implementation and not my coding. Hears and example of some of the things I have tried:
private void showCamera() {
try {
mPlayer = Manager.createPlayer("capture://video");
// mPlayer = Manager.createPlayer("capture://video&encoding=rgb565&width=640&height=480");
mPlayer.realize();
mVideoControl = (VideoControl)mPlayer.getControl("VideoControl");
canvas = new CameraCanvas(this, mVideoControl);
canvas.addCommand(mBackCommand);
canvas.addCommand(mCaptureCommand);
canvas.setCommandListener(this);
mDisplay.setCurrent(canvas);
mPlayer.start();
}
catch (Exception ex) {}
}
public void capture() {
try {
// Get the image.
byte[] raw = mVideoControl.getSnapshot("encoding=jpeg&quality=100&width=640&height=480");
// byte[] raw = mVideoControl.getSnapshot("encoding=png&quality=100&width=
// 640&height=480");
// byte[] raw = mVideoControl.getSnapshot(null);
Image image = Image.createImage(raw, 0, raw.length);
// Image thumb = createThumbnail(image);
// Place it in the main form.
if (mMainForm.size() > 0 && mMainForm.get(0) instanceof StringItem)
mMainForm.delete(0);
mMainForm.append(image);
If anyone could help it would be much appreciated.
I have reseved word from a number of sources that there is indeed a limitation on the camera access the JVM has witch is put in place by the operating system.