bytearray

问题 So far I have: using (MemoryStream ms = new MemoryStream(imageData)) { Bitmap img = (Bitmap)Image.FromStream(ms); } And then I would imagine I would be able to get a BitmapSource from img somehow? If this is totally wrong please feel free to correct me. 回答1: Try using BitmapSource.Create(). But you need to create pallete first: var colors = new List<Color>(); colors.Add(Colors.Red); colors.Add(Colors.Blue); colors.Add(Colors.Green); var palette = new BitmapPalette(colors); 回答2: Got the

问题 i got the image from post response PostMethod post = new PostMethod(action); HttpClient httpClient = createHttpClient(); ........ httpClient.executeMethod(post); try { log.info("post successfully"); String contentType = post.getResponseHeader("Content-type").getValue(); int contentLength = (int) post.getResponseContentLength(); byte[] responseBody = FileUtils.convertInputStreamtoByteArray(post.getResponseBodyAsStream()); log.info("get response sucessfully : size "+ responseBody.length +"

问题 The BLOB field (pic) is turning out as 0 Bytes when trying to send ByteArray through as3 to PHP, so i assume the PHP script or the HTTP_RAW_POST_DATA isn't working. I think the Flash part is working, I have set a trace() to see if the bitmapdata is coming through and it seems it is, so I'm assuming its my php side. I'll post both parts of the code in hope someone here can fix it for me. Thanks. AS3 private function export():void { var bmd:BitmapData = new BitmapData(600, 290); bmd.draw(board)

问题 After a lot of learning on ByteArrays & BLOBS, I managed to write the below Java code to write an image into Access DB (Using ucanaccess) and writing it back to Disk. When I write an image back to disk the image is in incorrect format or something is messed up that you cannot open that image. I understand it is not a good practice to store Images on DB but, this is only for my learning. public static void Update_to_DB() throws SQLException, IOException { String URL = "jdbc:ucanaccess://C:\

问题 I am working on a project in which a UDP connection must be used to send an arbitrary file between two unix machines. The main crux of the project is to encode data into byte arrays and send them between the two machines. My original plan was to take byte arrays, form a list out of them, and then serialize them with pickle and send. However, I was just told today by my instructor that using lists and serializing with pickle was not an acceptable solution to the problem. To quote his words:

问题 I would like to get a ByteArray from a BitmapData in AS3. I tried the following: var ba:ByteArray = myBitmapData.getPixels(0,0); It didn't work and I got this error ArgumentError: Error #1063: Argument count mismatch on flash.display::BitmapData/getPixels(). Expected 1, got 2. : 回答1: As Adobe said about BitmapData.getPixels : " Generates a byte array from a rectangular region of pixel data... ", so your parameter should be a Rectangle object. Take this example from Adobe.com : import flash

问题 I have written a ByteArray in a file. And then I am trying to read that ByteArray back from that same file.. public static void main(String[] args) throws Exception { //.. some code writeFile(allWrittenBytesTest); readFile(); } /** * Write the file in Java * @param byteArray */ public static void writeFile(byte[] byteArray) { try{ File file = new File("bytearrayfile"); boolean success = file.delete(); if(!success) { System.out.println("not able to delete the file"); } FileOutputStream output

问题 When we are using cryptography always we are seeing byte arrays are being used instead of String values. But when we are looking at the techniques of most of the cryptography algorithms they uses hex values to do any operations. Eg. AES: MixColumns, SubBytes all these techniques(I suppose it uses) uses hex values to do those operations. Can you explain how these byte arrays are used in these operations as hex values. I have an assignment to develop a encryption algorithm , therefore any

问题 I am stuck in a situation. I have some set of 10 images in drawable folder. During my code I have just the image name. for e.g "elephant.png" and I want the byte array of the image( drawable ) corressponding to image name. String imageName = getResources().getResourceEntryName(GroupIconAdapter.mThumbIds[position]); From here I get the image name and I want byte array. Is is possible? Thanks 回答1: Put this images into your assests directory and you can access like this way String url = "file://

问题 My server sends a encoded Base64 string to my android device. After that, I decode the Base64 string in this method to make a drawable of it. I can't see the image when I add it in an Itemizedoverlay. public Drawable seticon(String input){ byte[] b = Base64.decode(input, Base64.DEFAULT); Bitmap decodedByte = BitmapFactory.decodeByteArray(b, 0, b.length); Drawable drawable = new BitmapDrawable(decodedByte); drawable.setBounds(0, 0, 50, 50); return drawable; } public void setphotopoint(String