Got it, thanks! Here's the snippet of code:

            Signature[] sigs = 
getBaseContext().getPackageManager().getPackageInfo(getPackageName(), 
PackageManager.GET_SIGNATURES).signatures;
            for(Signature sig : sigs)
            {
                byte[] hexBytes = sig.toByteArray();                
                MessageDigest digest = MessageDigest.getInstance("MD5");
                byte[] md5digest = new byte[0];
                if(digest != null)
                {
                    md5digest = digest.digest(hexBytes);
                    StringBuilder sb = new StringBuilder();
                    for(int i = 0; i < b.length; ++i)
                    {
                        sb.append((Integer.toHexString((b[i] & 0xFF) | 
0x100)).substring(1, 3));
                    }
                    String fingerprintMD5 = sb.toString();
                }
            }
    

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