Using span to insert tab in textview

Is there a way to add a tab character to a piece of text using span in textview? From the developer documentation, I came across TabStopSpan (see here) and tried to use it in a TextView like so:

String source = "Hello World! Let's select some text!!";

        SpannableString s = new SpannableString(source);
        s.setSpan(new TabStopSpan() {
            @Override
            public int getTabStop() {
                return 100;
            }
        }, 5, 10, 0);
ed.setText(s, BufferType.SPANNABLE);  

Where ed is a TextView. The above snippet does not do anything and the documentation is so less as to be pretty much useless. Is there any way to add a tab character to a TextView using spans?

Just add "\t" for a tab, "\n" for a new line. For example:

String source = "Hello!\tLets select some text!";