SpannableString ss = new SpannableString("foo bar 2.00 foo foo");
ClickableSpan clickableSpan = new ClickableSpan() {
@Override
public void onClick(View textView) {
    startActivity(new Intent(MyActivity.this, NextActivity.class));
}
@Override
public void updateDrawState(TextPaint ds) {
        super.updateDrawState(ds);
        ds.setUnderlineText(false);
    }
};
ss.setSpan(clickableSpan, i, j, Spanned.SPAN_EXCLUSIVE_EXCLUSIVE); // where i and j should be the start and end index of your clickable string.
textView.setText(ss);