title: con.getInputStream() throw exception in Android project, how to fix?
body: <p>con.getInputStream() throw exception, when the code running on android,
  but when copy the code to regular java project it is working,<br>
  The thrown object e contain "detailMessage = Permission denied".
  my code::</p>
  
  <pre><code>            public static HttpData get(String sUrl) {
                  HttpData ret = new HttpData();
                  String str;
                  StringBuffer buff = new StringBuffer();
                  try {
                          URL url = new URL(sUrl);
                          URLConnection con = url.openConnection();
                          BufferedReader in = new BufferedReader(new InputStreamReader(con.getInputStream()));
                          while ((str = in.readLine()) != null) {
                                  buff.append(str);
                          }
                          ret.content = buff.toString();
  
                          //get headers
                          Map&lt;String, List&lt;String&gt;&gt; headers = con.getHeaderFields();
                          Set&lt;Entry&lt;String, List&lt;String&gt;&gt;&gt; hKeys = headers.entrySet();
                          for (Iterator&lt;Entry&lt;String, List&lt;String&gt;&gt;&gt; i = hKeys.iterator(); i.hasNext();) {
                                  Entry&lt;String, List&lt;String&gt;&gt; m = i.next();
  
                                  Log.w("HEADER_KEY", m.getKey() + "");
                                  ret.headers.put(m.getKey(), m.getValue().toString());
                                  if (m.getKey().equals("set-cookie"))
                                  ret.cookies.put(m.getKey(), m.getValue().toString());
                          }
                  } catch (Exception e) {
                          Log.e("HttpRequest", e.toString());
                  }
                  return ret;
          }
  </code></pre>
  
  <p><img src="https://i.stack.imgur.com/Ms6yG.jpg" alt="con object while debug"></p>