直接从CipherInputStream解密和读取mp3文件，而无需存储

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();