private void login()
    {
        Log.e("info_Login","session:"+s);
        id=i.getText().toString();
        password=p.getText().toString();
        code=c.getText().toString();
        FormBody body=new FormBody.Builder()
                .add("returnUrl","")
                .add("number",id)
                .add("passwd",password)
                .add("code",code)
         //       .add("submit","登录")
                .build();
        Request request=new Request.Builder()
                .url("http://58.194.172.34/reader/login.php")
                .post(body)
                .build();
        okhttp3.Call call2 = okHttpClient.newCall(request);
        call2.enqueue(new Callback()
        {
            @Override
            public void onFailure(okhttp3.Call call, IOException e)
            {
                e.printStackTrace();
            }
            @Override
            public void onResponse(okhttp3.Call call, final Response response) throws IOException
            {
                if(response.isSuccessful()){
                    Log.i("info_call2success",response.body().string());
                }
                Headers headers = response.headers();
                Log.e("info_respons.headers",headers+"");
            }
        });
    }

解决方案 »

  1.   

    if (response.isSuccessful()) {//这里的成功是请求成功,并非登录成功
    Log.i("info_call2success", response.body().string());
    }
    另外你提供的这个url   http://58.194.172.34/reader/login.php只是登录界面,并非登录接口
    你可以看看response.body().string()返回的数据结果:

    <!DOCTYPE HTML>
    <html>
    <head>
    <meta http-equiv="Content-Type" content="text/html; charset=utf-8">
    <title>山东大学图书馆v5.0书目检索系统 </title>
    <link type="text/css" rel="stylesheet" href="../tpl/css/style.css">
    <link type="text/css" rel="stylesheet" href="../tpl/css/mylib.css" />
    <link type="text/css" rel="stylesheet" href="../tpl/css/ui-lightness/jquery-ui-1.8.13.custom.css">
    <script  type="text/javascript" src="../tpl/js/jquery.1.7.1.min.js"></script>
    <script  type="text/javascript" src="../tpl/js/jquery-ui-1.8.13.custom.min.js"></script>
    <script  type="text/javascript" src="../tpl/js/highlighter.js"></script>
    </head>
    <body>
    <div id="header_opac">
    <h1 class="header_opac_img">
        <div class="header_opac_logo">
         山东大学图书馆书目检索系统<br>
            <p>Online Public Access Catalogue</p>
            
        </div>
        </h1>
        <div class="header_right header_right_top">
          <p class="header_right_font">       </p>
          <p style="margin-top:60px;" class="header_right_font">
            <a href="../opac/book_cart.php">暂存书架(<span id="bookcartCount">0</span>)</a> | <font color="blue"></font> <a href="../reader/login.php" style="color:#ff0000;">登录</a></p>
           </div>
    </div>
    <div id="menubar">
        <ul id="menu_top">
            <li><a href="../opac/search.php" target="_self" >书目检索</a></li>
          <li><a href="../top/top_lend.php" target="_self" >热门推荐</a></li>
          <li><a href="../browse/cls_browsing.php" target="_self" >分类浏览</a></li>
          <li><a href="../newbook/newbook_cls_browse.php" target="_self" >新书通报</a></li>
          <li><a href="../peri/peri_nav_e.php" target="_self" >期刊导航</a></li>
          <li><a href="../asord/asord_hist.php" target="_self" >读者荐购</a></li>
          <li><a href="../shelf/curriculum.php" target="_self" >学科参考</a></li>
          <li><a href="../info/info_guide.php" target="_self" >信息发布</a></li>
          <li><a class="menu_top_on" style="color:#6C5B23;" href="../reader/redr_info.php" target="_self" >我的图书馆</a></li>
               <div class="clear"></div>
        </ul>
    </div>
    <div id="submenu">
            <div class="clear"></div>
    </div>   <div id="mainbox">
       <div id="container">
          <div id="left_tab">
          <h5 class="box_bgcolor"><strong>登录我的图书馆</strong></h5>
           <form action="redr_verify.php" name="frm_login" method="POST">
            <table width="95%" border="0" cellpadding="3" cellspacing="1">
              <tr>
                <td align="right">用户名: </td>
                <td align="left"><input class="input" name="number" type="text" size="20" style="width:150px" ></td>
              </tr>
              <tr>
                <td align="right">密码: </td>
                <td align="left"><input class="input" name="passwd" type="password" size="20" style="width:150px" ></td>
              </tr>
              <tr>
                <td align="right">验证码: </td>
                <td align="left"><input style="width:50px" name="code" type="text"><img id="regimg" src="yz.php" align="absmiddle" /> <a href="javascript:changeRegImg()" class="h12" >看不清换一张</a></td>
              </tr>   <tr>
       <td></td>
       <td></td>
      </tr>
              <tr>
                <td align="right">&nbsp;</td>
                <td align="left"><input class="btn btn-danger" type="submit"   value="登录"><input type="hidden" name="returnUrl" value="" />
        <!--        <input class="btn" type="button" value="忘记密码" onclick="document.location='change_passwd.php'" /> --> </td>
      </tr>
      <tr>
       <td></td>
       <td><font color="red"> </font></td>
      </tr>
            </table>
            </form>    
          </div>
          
          <div id="right_con">
              <h5>提示</h5>
              <div id="content_note">
                <ul>
                 <li>用户名
    <br>新版校园卡请使用6位账号登录;旧版校园卡请使用校园卡号后6位登录,后6位的前面一位或两位有0的,去掉0.
    </li>
    <li>密码
    <br> 密码为校园卡的查询密码.
    </li>
    <li><font color=red><strong>未持有山东大学校园卡的读者,请在校园卡处输入原有证件的条形码号,密码为原有密码。</strong></font>
                        <li>
    因个人误操作而导致注销的读者,可持<font color=red>本人身份证</font>、<font color=red>校园卡</font>及<font color=red>学院出具的证明材料</font>,到所在校区分馆办证处进行恢复
    </li>
        </ul>
                
            </div>
          </div>
          <div class="clear"></div>
       </div>
       <div class="clear"></div>     
    </div><div id="footer"><div id="copy"><p> 山东大学图书馆&nbsp;&nbsp; OPAC v5.0  &nbsp;&nbsp;</p><p>&copy; 1999-2012 <a target="_blank" href="http://www.libsys.com.cn">Jiangsu Huiwen Software Ltd. 江苏汇文软件有限公司</a></p></div></div></body></html>
    这就是你那个学校登录页的H5,更充分说明你这url并不是登录接口