title: android span click event
body: <p>Ok. These are my problems.</p>
  
  <ol>
  <li>I need to user regular expressions to filet out everything except for letters and then I need to encase the found words within a  $word  tag.
  With this str = str.replaceAll(pattern, "$0");.
  right now I am filtering all of the right elements (punctuation, numbers etc) but its encasing every letter within each word in an a tag not the word. so how do I use the regular expression to group the letters to a word?</li>
  </ol>
  
  <p>from "(a tag open)t(a close)(a tag open)h(a close)(a tag open)i(a close)(a tag open)s(a close) (a tag open)i(a close)(a tag open)s(a close) (a tag open)w(a close)(a tag open)r(a close)(a tag open)o(a close)(a tag open)n(a close)(a tag open)g(a close)";</p>
  
  <p>to :</p>
  
  <p>"(a tag open)This(a close) (a tag open)is(a close) (a tag open)right(a close)";</p>
  
  <p>then I'm making them clickable and I need to catch the click event and get the position on screen on the clicked word as I want to use the clicked event to make a tool tip show up just below the clicked word. thank you for your help.</p>
  
  <p>public class MainActivity extends Activity {</p>
  
  <pre><code>public String text = "This is just a sentence to test you. 23 this is another number23!g?";
  public TextView tv;
  
  @Override
  protected void onCreate(Bundle savedInstanceState) {
      super.onCreate(savedInstanceState);
  
      setContentView(R.layout.activity_main);
  
      text = explode(text);
  
      tv = (TextView) findViewById(R.id.tv1);
  
      tv.setLinksClickable(true);
      tv.setMovementMethod(LinkMovementMethod.getInstance());
  
      Spanned article = Html.fromHtml(text, null, null);
      setHTML(article);
  }
  
  
  public void setHTML(Spanned html) {
        SpannableString message = new SpannableString(html.toString());
        Object[] spans = html.getSpans(0, html.length(), Object.class);
        for (Object span : spans) {
           int start = html.getSpanStart(span);
           int end = html.getSpanEnd(span);
           int flags = html.getSpanFlags(span);
           if (span instanceof URLSpan) {
              URLSpan urlSpan = (URLSpan) span;
              span = new CallbackSpan(urlSpan.getURL());
           }
           message.setSpan(span, start, end, flags);
        }
        tv.setText(message);
     }
      public String explode(String str){  
        String pattern = "([a-zA-Z])";
        str = str.replaceAll(pattern, "&lt;a href=\"$0\"&gt;$0&lt;/a&gt;");
        return str;
      }
  
     private final class CallbackSpan extends ClickableSpan {
  
        private String m_data;
        private String url_main;
  
        public CallbackSpan(String url) {
           m_data = url.substring(0);
           url_main = url;
  
        }
  
        public void onClick(View view) {
  
            TextView item = (TextView)findViewById(R.id.tv2);
            item.setText(url_main + " was clicked.");
            Log.d("item", url_main);
        }
     }
  </code></pre>
  
  <p>}</p>