Decrypt and read mp3 file directly from CipherInputStream without storing

Question

I'm downloading and encrypting mp3 files in my android apps. But I'm trying to decrypt and READ the files without writing the file back to file system. When I try to use CipherInputStream to stream the mp3 to android Mediaplayer API, It cannot recognise the file. However, when I try to to convert to Byte array and stream it as ByteArrayInputStream, it works but I don't want to this because it could take much time for larger files and store the data in JVM.

Here is my code

FileInputStream fis = new FileInputStream(file);
CipherInputStream cis = new CipherInputStream(fis, cipher);
mbuffer = new ByteArrayInputStream(getByte(cis));
Response streamResponse = new Response(Status.OK, mimeType, mbuffer);

The above code works fine but the problem with this

new ByteArrayInputStream(getByte(cis));

in getByte method, I convert CipherInputStream to byte then convert it back to InputStream .

I'm trying to stream cis directly to

Response streamResponse = new Response(Status.OK, mimeType, cis);

But doesn't work with MediaPlayer

Answer 1

         File tempMp3 = File.createTempFile("kurchina", "mp3", getCacheDir());

         tempMp3.deleteOnExit();

         FileOutputStream fos = new FileOutputStream(tempMp3);

         fos.write(mp3SoundByteArray);

         fos.close();



         FileInputStream fis = new FileInputStream(tempMp3);

         mp.setDataSource(fis.getFD());



         mp.prepare();

         mp.start();