Add attachment to gmail app via intent android

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Android

I have an application which can open PDF via taping on app, openwith and also email attachment. I convert that file into inputstream and then to bytearray. Now I want this opened pdf to attach as attachment to gmail using Intent. I achieved this with the following code which adds pdf as attachment with no size, but received mail do not contain the attachment and a notification couldn't send attachment is displayed. Tried many ways.. but unsuccessful.. any help at the earliest. thanks in advance.

Intent sendIntent = new Intent(Intent.ACTION_VIEW);
                sendIntent.setType("application/pdf");
                sendIntent.setData(Uri.parse("testuurmi@gmail.com"));
                sendIntent.setClassName("com.google.android.gm", "com.google.android.gm.ComposeActivityGmail");
                sendIntent.putExtra(Intent.EXTRA_EMAIL, new String[] { "testuurmi@gmail.com" });
                sendIntent.putExtra(Intent.EXTRA_SUBJECT, "testPDF");
                sendIntent.putExtra(Intent.EXTRA_TEXT, "this is a PDF ");

                File pdfFile=null;
            try {
                pdfFile = new File(attachmentFileName);
                FileOutputStream fos = new FileOutputStream(pdfFile);
                fos.write(bytes);
            } catch (FileNotFoundException e) {
                e.printStackTrace();
            } catch (IOException e) {
                e.printStackTrace();
            }

                Uri fileuri = Uri.fromFile(pdfFile);
                 sendIntent.putExtra(Intent.EXTRA_STREAM, fileuri);
                //start the gmailapp intent
                startActivity(sendIntent);

What I have tried:

I tried to use inputstream and bytearray already available with me to generate uri and attach. I dont want to physically write the file into SD card. Avaialble inputstream or bytearray should be converted to pdf and attach to gmail.