Uri uri = Uri.parse("content://com.google.android.providers.talk/messages" + "/" + msgId);

Uri uri = Messages.getContentUriByThreadId(50);

ContentResolver cr = getContentResolver();
Cursor c = cr.query(uri, null, null, null, null);
if (null != c)
{
     try
     {
          while (c.moveToNext())
          {
               printCursor(c);
          }
     } catch (Exception e){ Logger.l(e); }
     c.close();
}