How to set the part of the text view is clickable like "Terms of Service" or "Privacy Policy"

gistfile1.java

private void setClickableMessage(TextView textView) {
    String message = "By signing up, you agree to our Terms of Service";
    String linkText = "Terms of Service";
    int indexStart = message.indexOf(linkText);
    textView.setMovementMethod(LinkMovementMethod.getInstance());
    textView.setText(message, TextView.BufferType.SPANNABLE);
    Spannable spannable = (Spannable)textView.getText();
    ClickableSpan clickableSpan = new ClickableSpan() {
        @Override
        public void onClick(View textView) {
      /* do something */
            startActivity(new Intent(MyActivity.this, NextActivity.class));
        }
        @Override
        public void updateDrawState(TextPaint ds){
            ds.setUnderlineText(true);
            ds.setColor(Color.rgb(255, 255, 255));
        }
    };

    try {
        spannable.setSpan(clickableSpan, indexStart, indexStart + linkText.length(), Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);
    } catch (Exception e) {
        Log.e("TAG", "Exception");
    }
}