Android访问php取回json数据

     PHP代码：    <br />    <pre class="brush:php; toolbar: true; auto-links: false;">$array = array(   'username'=>'杨铸',   'password'=>'123456',   'user_id'=>1 ); echo json_encode($array); </pre>    <pre class="brush:java; toolbar: true; auto-links: false;">private void startUrlCheck(String username,String password) {  HttpClient client = new DefaultHttpClient();  StringBuilder builder = new StringBuilder();   HttpGet myget = new HttpGet("http://10.0.2.2/Android/index.php");  try {   HttpResponse response = client.execute(myget);   BufferedReader reader = new BufferedReader(new InputStreamReader(   response.getEntity().getContent()));   for (String s = reader.readLine(); s != null; s = reader.readLine()) {    builder.append(s);   }   JSONObject jsonObject = new JSONObject(builder.toString());   String re_username = jsonObject.getString("username");   String re_password = jsonObject.getString("password");   int re_user_id = jsonObject.getInt("user_id");   setTitle("用户id_"+re_user_id);   Log.v("url response", "true="+re_username);   Log.v("url response", "true="+re_password);  } catch (Exception e) {   Log.v("url response", "false");   e.printStackTrace();  } }</pre>其中http://10.0.2.2为Android访问本机url的ip地址。对应电脑上测试的http://127.0.0.1 另外执行代码时会抛出异常 java.net.SocketException: Permission denied 此为应用访问网络的权限不足 在AndroidManifest.xml中，需要进行如下配置：    <uses-permission android:name="android.permission.INTERNET">     就加在 之前就好了然后测试通过。    </uses-permission>