title: The onClick() of ClickableSpan is not working for URLSpan?
body: <p>In a TextView, I want to popup a toast whenever a hyperlink is clicked, instead of opening the corresponding url in a browser. I use the following code, but the problem here is the onClick() method seems never be called!!:</p>
  
  <pre><code>String source = "&lt;a href=\"http://www.google.com\"&gt;link&lt;/a&gt; ";
  
  // Get SpannableStringBuilder object from HTML code
  CharSequence sequence = Html.fromHtml(source, imgGetter, null);
  SpannableStringBuilder strBuilder = new SpannableStringBuilder(sequence);
  
  // Get an array of URLSpan from SpannableStringBuilder object
  URLSpan[] urlSpans = strBuilder.getSpans(0, strBuilder.length(), URLSpan.class);
  
  // Add onClick listener for each of URLSpan object
  for (final URLSpan span : urlSpans) {
      int start = strBuilder.getSpanStart(span);
      int end = strBuilder.getSpanEnd(span);
  
      strBuilder.setSpan(new ClickableSpan()
      {
      @Override
      public void onClick(View widget) {
          Toast toast = Toast.makeText(context, "well done! you click " + span.getURL(), Toast.LENGTH_SHORT);
          toast.show();           
      }       
      }, start, end, Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);
  }
  
  TextView t4 = (TextView) findViewById(R.id.text4);
  t4.setText(strBuilder);
  // No action if this is not set
  t4.setMovementMethod(LinkMovementMethod.getInstance());
  </code></pre>
  
  <p>Can anyone tell me what's wrong with my code and how to fix it? Thanks.</p>