bytearray

问题 I know how to read a bitmap file into a byte array. How is the byte array then converted to a Java Bitmap? 回答1: Use BitmapFactory if you already have your byte array: Bitmap bitmap = BitmapFactory.decodeByteArray(yourByteArray, offset, length); 回答2: Skip the byte array if you want: Bitmap bitmap = BitmapFactory.decodeFile(filename); 来源： https://stackoverflow.com/questions/4097088/how-to-read-a-file-into-a-java-bitmap

问题 I've been trying to figure out how to read a byte array from one of my resource files, I have tried the most popular hits on Google without clear success. I have a file stored in the resource collection of my program, I'd like to read this file as a byte array I'm currently just reading the file from the root directory of my program with the following code: FileStream fs = new FileStream(Path, FileMode.Open); BinaryReader br = new BinaryReader(fs); byte[] bin = br.ReadBytes(Convert.ToInt32(fs

问题 To keep this simple, I'll only be encoding/decoding a single byte. If I encode the byte 127, I get the base64 string "fw==" which can be successfully decoded back to byte 127. If, however, I encode a byte ≥ 128, then even though I can produce a base64 string without error (for example, byte 128 gives the string "gA=="), I get an error when I try to decode it. Here's my code which can be copy-pasted into any Xcode playground to reproduce the problem: func stringToByteArray(string: String) ->

问题 I have a post web service, where I need to send image in byte array, and as I need to send post parameters in JSON format, I have created its NSDictionary . My issue is how can I assign object to key in dictionary for Byte , I tried doing so and application crashes while creating NSDictionary . I am also explaining each steps with code for easy understanding of y question below :- Here is my code for converting image to Byte format :- NSData *data = [NSData dataWithContentsOfFile:filePath];

问题 I am using this code to find the MAC address of a machine. This code prints directly the MAC address, but I want to return it as a string. I am completely confused. please help. try { InetAddress add = InetAddress.getByName("10.123.96.102"); NetworkInterface ni1 = NetworkInterface.getByInetAddress(add); if (ni1 != null) { byte[] mac1 = ni1.getHardwareAddress(); if (mac1 != null) { for (int k = 0; k < mac1.length; k++) { System.out.format("%02X%s", mac1[k], (k < mac1.length - 1) ? "-" : ""); }

问题 I have a byte array representation of a Image. How to save it on disk as an image file. I have already done this OutputStream out = new FileOutputStream("a.jpg"); out.write(byteArray); out.flush(); out.close(); But when I open the image by double-clicking it, it doesn't show any image. 回答1: Other than failing to use a try/finally block (at least in the code you've shown) that should be fine. (You don't need to flush an output stream if you're closing it, by the way.) As it's not working, that

问题 This is a simple one, and one that I thought would have been answered. I did try to find an answer on here, but didn't come up with anything - so apologies if there is something I have missed. Anyway, is there an equivalent of StringBuilder but for byte arrays? I'm not bothered about all the different overloads of Append() - but I'd like to see Append(byte) and Append(byte[]) . Is there anything around or is it roll-your-own time? 回答1: Would MemoryStream work for you? The interface might not

问题 I'm new to go, so don't know a whole lot about the language specific constructs. My use case is first to read into memory an input file containing JSON blobs that are newline delimited. From this "array" of JSON source, I'd like to unmarshal each array element to deal with it in golang. The expected structure mapping is already defined. I typically like to read all lines at once, so ioutil.ReadFile() as mentioned in How can I read a whole file into a string variable in Golang? seems like a

问题 I'm trying to capture the picture I'm getting from webview.capturePicture() to save it to an sqliteDatabase, to do I need to convert the image to a byte[] to be able to save it as a BLOB in my table, and then by able to retrieve that byte[] and convert it back to a bitmap. Here is what I'm doing: Picture p = webView.capturePicture(); ByteArrayOutputStream bos = new ByteArrayOutputStream(); p.writeToStream(bos); byte[] ba = bos.toByteArray()); I then retrieve the image by: byte[] image =

问题 I need to convert numerical values into byte arrays. For example, to convert a long to a byte array, I have this method: public static byte[] longToBytes(long l) { ByteBuffer buff = ByteBuffer.allocate(8); buff.order(ByteOrder.BIG_ENDIAN); buff.putLong(l); return buff.array(); } It's pretty straightforward - take a long, allocate an array that can hold it, and throw it in there. Regardless of what the value of l is, I will get an 8 byte array back that I can then process and use as intended.