thumbnails

问题 I have used all the Standard Network related code for Getting Images of about 45KB to 75KB but all are failing these methods work fine for Files of about 3-5KB size of Images. How can I achieve Downloading Image of 45 - 75KB for displaying them on an ImageView in Android for my Network Operations the Things I have used are final URL url = new URL(urlString); final URLConnection conn = url.openConnection(); HttpURLConnection httpConn = (HttpURLConnection) conn; httpConn.setAllowUserInteraction

问题 What's the most efficient way to create a thumbnail from an arbitrary web image in iPhone? 回答1: the comparison of two method for fast creating thumbnail from image kindly see this link for detail http://www.cocoaintheshell.com/2011/01/uiimage-scaling-imageio/ or http://vocaro.com/trevor/blog/2009/10/12/resize-a-uiimage-the-right-way/ for future , just copy pasting code from first one First method, using UIKit void)buildGallery { for (NSUInteger i = 0; i < kMaxPictures; i++) { NSInteger imgTag

问题 Nautilus shows me a thumbnail of a file, if its an image it will show me a preview, if its a video it will show a frame from the video, if its a document it will show me the application icon. How can I access the image? I see they are cached in ~/.thumbnail/ however they are all given unique names. 回答1: the thumbnail filename is an md5 of the filename. However the filename is the absolute URI to the image (without a newline). So you need to do: echo -n 'file:///home/yuzem/pics/foo.jpg' |

问题 I'm having problems generating thumbnails of images with an Alpha channel (transparency). The code I use is this: public void saveThumbnail(File file, String imageType) { if (bufferedThumb == null) { return; } if(bufferedImage.getColorModel().hasAlpha()) { logger.debug("Original image has Alpha channel"); } BufferedImage bi = new BufferedImage(bufferedThumb.getWidth(null), bufferedThumb.getHeight(null), BufferedImage.TYPE_INT_ARGB); Graphics g = bi.getGraphics(); g.drawImage(bufferedThumb, 0,

问题 I'm having problems generating thumbnails of images with an Alpha channel (transparency). The code I use is this: public void saveThumbnail(File file, String imageType) { if (bufferedThumb == null) { return; } if(bufferedImage.getColorModel().hasAlpha()) { logger.debug("Original image has Alpha channel"); } BufferedImage bi = new BufferedImage(bufferedThumb.getWidth(null), bufferedThumb.getHeight(null), BufferedImage.TYPE_INT_ARGB); Graphics g = bi.getGraphics(); g.drawImage(bufferedThumb, 0,

问题 I have created an application and associated on registry a file extension on Windows 10, so when you double click a file associated with my extension, it opens my app with the file as parameter. Now, I want the files associated to my application to behave in Windows 10 just like images - I mean, having a thumbnail preview, so when the user selects "large icons", he would be able to see a preview of the file. I wonder how can I do it. What kind of metadata my file should have so Windows would

问题 I am using this for reference: Getting thumbnail from a video url or data in IPhone SDK The method is using the MPMoviePlayerController class instead of the AVFoundation, and I think I want to use that as well because the people said that MPMoviePlayer way is faster than the AVFoundation way. The problem is, the method used to create the thumbnails, [player thumbnailImageAtTime:1.0 timeOption:MPMovieTimeOptionNearestKeyFrame] is deprecated in iOS 7.0. By looking at the apple docs, the

问题 I have created a grid of images using Bootstrap 3's .thumbnail class. Everything seems to be working great with regards to the images resizing, and the columns changing depending on the window size. The only problem is the images are all different sizes, and both portrait/landscape orientation. This causes awkward breaks and "pile-ups" with the thumbnail divs… I was hoping to find a way to create a grid of SQUARE responsive divs using the .thumbnail class. So in other words, the width

问题 I'm budiling an application and it lists all the videos i recorded using the recorder in a list. Is it possible for me to create a thumbnail with the help of Uri instead of the string??? my current code goes as below but it no longer works as my input to the constructor is Uri not string. bmThumbnail = ThumbnailUtils.createVideoThumbnail( (db_results.get(position)), Thumbnails.MICRO_KIND); imageThumbnail.setImageBitmap(bmThumbnail); I'm returned the error The method createVideoThumbnail

问题 What's the shortest way to combine say 20 256x256 thumbnails into a single large image of 4 rows by 5 columns using RMagick? 回答1: Assuming all the images are in the current directory and named from 1.jpg to n.jpg and row * col = n. include Magick row = NUM_ROWS col = NUM_COLS ilg = ImageList.new 1.upto(col) {|x| il = ImageList.new 1.upto(row) {|y| il.push(Image.read((y + (x-1)*col).to_s + ".jpg").first)} ilg.push(il.append(false))} ilg.append(true).write("out.jpg") 来源： https://stackoverflow