Question

In my android application. I got binary code from a jpeg image from the code as follows.

byte[] val = stream.toByteArray();
          BigInteger bi = new BigInteger(val);
    String s =  bi.toString(2);

This string s prints the binary value of the image.
My question is how to convert this binary format into a jpeg image??

Answer 1

I’m not really sure what you want.

• If you want to create a Bitmap-instance directly from the stream you can use BitmapFactory and display that Bitmap in an ImageView-instance afterwards:

  Bitmap image = BitmapFactory.decodeStream(stream);
  imageView.setImageBitmap(image);
  

• If you want to convert your string representation with radix 2 back to a binary array you can use BigInteger too:

  BigInteger bigInt = new BigInteger(s, 2);
  byte[] binaryData = bigInt.toByteArray();