Android Convert bytes array to File and Save file in SD card

Question

I convert one file in byte array in server and send as a by json string to Android Client.. by this code i convert that file :

FileInputStream fileInputStream=null;

        File file = new File("C:\\testing.txt");

        byte[] bFile = new byte[(int) file.length()];

        try {
            //convert file into array of bytes
        fileInputStream = new FileInputStream(file);
        fileInputStream.read(bFile);
        fileInputStream.close();
}catch(Exception e){
            e.printStackTrace();
        }

and in Android Client i got the value like : "SGVsbG8gRG93bmxvYWQgaXMgd29ya2luZw==" (In String Type)

So how i convert this code into byte and convert in file and save in sd card?

This is base64. Try and see if the Android JDK has a method for reading this kind of stuff and converting it to binary. — fge, Jun 17 '13 at 13:53
http://stackoverflow.com/questions/15470221/convert-binary-stream-into-byte/15470323#15470323 hope this will give you some solution.. — Nirmal, Jun 17 '13 at 14:02

score 3 · Answer 1 · answered Jun 17 '13 at 13:55

3

You have binary data encoded using BASE64 encoding.

To decode it you can use android.util.Base64 class.

To learn how to write file to an external store read this article.

answered Jun 17 '13 at 13:55

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score 1 · Answer 2 · answered May 31 '17 at 11:39

try {
     /* file_byte is yous json string*/
    byte[] decodestring = Base64.decode(file_byte, Base64.DEFAULT);
    File file = Environment.getExternalStorageDirectory();
    File dir = new File(file.getAbsolutePath() + "/VPM/Document/");
     if (!dir.exists()) {
         dir.mkdirs();
     }
     File document = new File(dir, doc_name);

     if (document.exists()) {
         document.delete();
      }

     FileOutputStream fos = new FileOutputStream(document.getPath());
      fos.write(decodestring);
      fos.close();
   } catch (Exception e) {
    Log.e(TAG, "error: " + e.getMessage());
    runOnUiThread(new Runnable() {
    @Override
        public void run() {
            Snackbar.make(root_doc, "Failed to download file..", Snackbar.LENGTH_LONG)
            .setAction("Action", null).show();
        }
    });
}

Android Convert bytes array to File and Save file in SD card

2 Answers2