code

 private void FindFile () {
        // TODO Auto-generated method stub

        String S1;
        S1 = "4F 45 4D 5F 49 4E 46 4F 03 00 00 00 12 00 00 00";
        String S2;
        int x;

        for (x = 1; x < 2; x++) {

            try {

                File file = new File("/storage/emulated/0/oeminfo.img");
                RandomAccessFile raf = new RandomAccessFile(file, "r");

                Log.d(TAG, "Position to start: " + a);
                raf.seek(a);
                byte[] arr = new byte[16];
                raf.readFully(arr, 0, 16);
                StringBuilder sb = new StringBuilder();
                for (byte b : arr) {
                   sb.append(String.format("%02X ", b));
                }
                S2 = sb.toString();
                Log.d(TAG, "We found: " + S2);
                Log.d(TAG, "NO found: " + S1);

                if (S2 != S1) {
                    Log.d(TAG, "Still not found. Searching next");
                    a=a+16384;
                    x=x-1;
                    Log.d(TAG, "---------------SEPARATOR---------------");
                }

                else {
                    Log.d(TAG, "We find int! Start file Address: " + a);
                    x=x+2;
                }

            } catch (Exception e) {
                e.printStackTrace();
            }
        }

    }