Passing byte[] in Chilkat Java API

I have a working hashing task in VB.NET as follows:

    Dim operand As Byte() = some bytes....
    Dim ckCrypt As New Chilkat.Crypt2()
    ckCrypt.EncodingMode = "Base64"
    ckCrypt.HashAlgorithm = "sha1"
    Dim lNewDigest As String = ckCrypt.HashBytesENC(operand)

This works perfectly. The variable lNewDigest gets the Digest value as expected.

Now I have a need to have the same task in Android.

So my code is:

    byte[] operand= some bytes....
    CkCrypt2 ckCrypt = new CkCrypt2();
    ckCrypt.put_EncodingMode( "Base64");
    ckCrypt.put_HashAlgorithm ( "sha1");
    String lNewDigest = ckCrypt.HashBytesENC(operand);

I saw some example on using CkByteData in between. But I am totally lost. I did not have any luck in appending plain bytes (operand) to CkByteData.