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POHow to write String to txt file and send it to server
 

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  1. POHow to write String to txt file and send it to server
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    <p>I want to develop an application in android in which I need to capture image and convert that image to string and write that string in txt file and send it to server where server reads that file and convert that string to image again...</p> <p>now i have done with image taking part and converting that image into string and writing that string to txt file.</p> <p>but when am try to read that file and convert that string into the image it's not working...</p> <p>Code for converting image into string is</p> <pre><code>File imageFile = new File(path); Bitmap bitmap = BitmapFactory.decodeFile(imageFile.getAbsolutePath()); ByteArrayOutputStream stream = new ByteArrayOutputStream(); bitmap.compress(Bitmap.CompressFormat.PNG, 90, stream); byte[] image = stream.toByteArray(); imgstr = Base64.encodeToString(image, 0); </code></pre> <p>Code for writing that into file is</p> <pre><code>File file = new File("new.txt"); FileWriter w = new FileWriter("/sdcard/new/new.txt"); BufferedWriter out = new BufferedWriter(w); out.write(data); out.flush(); out.close(); </code></pre> <p>And code for read that file and convert that string to image again is</p> <pre><code>FileInputStream fstream = new FileInputStream("/sdcard/new/new.txt"); DataInputStream in = new DataInputStream(fstream); BufferedReader br = new BufferedReader(new InputStreamReader(in)); String strLine; ArrayList list=new ArrayList(); while ((strLine = br.readLine()) != null) { list.add(strLine); } Iterator itr; for (itr=list.iterator(); itr.hasNext(); ) { String str=itr.next().toString(); StringBuffer sb=new StringBuffer(str); int length=sb.length(); String imageDataString = sb.substring(0, length); byte[] decodedString = Base64.decode(imageDataString, Base64.DEFAULT); Bitmap decodedByte = BitmapFactory.decodeByteArray(decodedString, 0,decodedString.length); FileOutputStream imageOutFile = new FileOutputStream("/sdcard/new/android.jpg"); imageOutFile.write(decodedString); imageOutFile.close(); System.out.println("File converted"); </code></pre> <p>but its not converting that string into image please tell me solution for it...</p>
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    1. PTQuestion
    1. USNikita Beloglazov
    1. USYograj Shinde
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      1. POHow to write String to txt file and send it to server
      1. USVladimir
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      1. VTUpMod
    1. COTry to ouput String that you get after `Base64.encode` and stirng taht you are passing to `Base64.decode` to compare them. If they too long to compare - output they hash values and check if they equal.
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      1. POHow to write String to txt file and send it to server
      1. USNikita Beloglazov
    2. CO@yograjshinde exactly why do you want to convert an image to a string to send it? is this some kind of homebaked cryptography? the string's only advantage is content / format manipulation, but this is definitely NOT the way to manipulate images. why not just upload the images directly? PLUS, image data converted to string will probably occupy MORE space. please satisfy my curiosity, because you certainly have a reason to be doing this.
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      1. UStony gil
    3. COWhy image -> String -> image? Just send it as byte array.
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      1. USm0skit0
 

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