Android : Clickable text for each row in Android textview

I am working in an android application where I want to display all rows of table in a textview with a "Read more" link at the end of each row.

I need the output as :

Part_Of_row1 ...Read more

Part_Of_row2 ...Read more

When Read more link is clicked,the respective complete row should be displayed. It works fine when only one row is displayed. When I use loop to display all rows , "Read more" link is not working.

This is the piece of code in my textview,

TextView txt = (TextView) findViewById(R.id.tv);

db = openOrCreateDatabase("DB", MODE_PRIVATE, null);

            Cursor cur = db.rawQuery("select * from TABLE", null);

            cur.moveToFirst()

            String show = "";
            do {

                String pt = "//data retrieved from table(row-wise)";
                SpannableStringBuilder sb = new SpannableStringBuilder();
                    String sub1 = pt.substring(0, 40);
                    String sub2 = "...";
                    String sub3 = "Read more";
                    sb.append(sub1);
                    sb.append(sub2);
                    sb.append(sub3);
                    final String finalPt = pt;
                    sb.setSpan(new ClickableSpan() {
                        @Override
                        public void onClick (View view){
                            txt.setText(finalPt);
                        }
                    },sb.length()-sub3.length(),sb.length(),
                             Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);


                show = show + sb+"\n\n";
            } while (cur.moveToNext());
            txt.setText(show);
            txt.setMovementMethod(LinkMovementMethod.getInstance());

Thanks in advance.