分析数据时出错：JSONException:Value<；无法将java.lang.String类型的br转换为JSONObject

我正在做登记表。我有两个类：

ClientServer.java

和

JSONParser.java

ClientServer.java:

package com.example.mapsdemo;        
    import java.util.ArrayList;
    import java.util.List;      
    import org.apache.http.NameValuePair;
    import org.apache.http.message.BasicNameValuePair;
    import org.json.JSONException;
    import org.json.JSONObject;



    import android.app.Activity;
    import android.content.Intent;
    import android.os.AsyncTask;
    import android.os.Bundle;
    import android.util.Log;
    import android.view.View;
    import android.view.View.OnClickListener;
    import android.widget.Button;
    import android.widget.EditText;

    public class Clientserver extends Activity {            
        EditText username,email,password;
        Button signup,intent;
        String mpostusername,mpostpassword,mpostemail;

           private static final String TAG_SUCCESS = "success";
         JSONParser jsonParser = new JSONParser();

        @Override
        protected void onCreate(Bundle savedInstanceState) {
            super.onCreate(savedInstanceState);
            setContentView(R.layout.activity_clientserver);        

            username = (EditText) findViewById(R.id.username);

            email = (EditText) findViewById(R.id.email);

            password = (EditText) findViewById(R.id.password);

            signup  = (Button)findViewById(R.id.signup);

            intent = (Button)findViewById(R.id.go);

                    //Setup the Button's OnClickListener
                    signup.setOnClickListener(new OnClickListener() {
                        @Override
                        public void onClick(View v) {
                            //Get the data
                             new CreateNewAccount().execute();

                                Log.d("my", "in onclick...create new account executed");
                }
            });

                    intent.setOnClickListener(new View.OnClickListener() {

                        @Override
                        public void onClick(View v) {
                            // TODO Auto-generated method stub
                            Intent i = new Intent(Clientserver.this,MainActivity.class);
                            startActivity(i);
                        }
                    });
        }

        class CreateNewAccount extends AsyncTask<String, String, String> {

            /**
             * Before starting background thread Show Progress Dialog
             * */

            /**
             * Creating product
             * */
            protected String doInBackground(String... args) {

                Log.d("my", "in doInBackground()");     

                mpostusername = username.getText().toString();
                 mpostemail = email.getText().toString();
                 mpostpassword = password.getText().toString();


                    Log.d("my", "getting inputs is executed");
                 List<NameValuePair> params = new ArrayList<NameValuePair>();

                    params.add(new BasicNameValuePair("username",mpostusername));
                    params.add(new BasicNameValuePair("email",mpostemail));
                    params.add(new BasicNameValuePair("password",mpostpassword));
                    Log.d("my", "parameter adding executed");

                JSONObject json = jsonParser.makeHttpRequest("http://<ip_address>/android_connect/register.php","POST", params);        

                if(json!=null){
                      // do something                    
                Log.d("my", "http request made successfully");

                try {
                    int success = json.getInt(TAG_SUCCESS);         
                    Log.d("my", "JSON tag_success is working");                         
                    if (success == 1) {                         
                        Log.d("my", "in success=1"); 
                        // successfully created product
                        Intent i = new Intent(getApplicationContext(), MainActivity.class);
                        startActivity(i);

                        // closing this screen
                        finish();
                    } else {                            
                        Log.d("my", "In else");                          
                    }
                } catch (JSONException e) {
                    e.printStackTrace();
                }
                }
                return null;
            }
        }
    }

注意： 1.我在SO上见过许多类似的问题，也尝试过许多解决方案，但在尝试了大约2个小时后都不起作用，所以，请不要将其标记为dulicate.plz帮助

我知道，我的php代码受到SQL注入的影响。但是，这只是为了练习，将来我会用mysqli和PDO编辑它们

---

尝试将isset放在PHP中，以确保它们获得所有的值（类似于必填字段），我认为问题出在您的查询中

$result = mysql_query("INSERT INTO accounts(email, password, username) 
    values ('$email','$password','$username')");

试试这个。另外，如果您的URL在命令提示符中出现问题，请使用ipconfig并获取最顶端的ipv4地址，并将其作为您的端口。

/Json Handler

公共类ServiceHandler{

static String response = null;
public final static int GET = 1;
public final static int POST = 2;

public ServiceHandler() {

}

/**
 * Making service call
 * @url - url to make request
 * @method - http request method
 * */
public String makeServiceCall(String url, int method) {
    return this.makeServiceCall(url, method, null);
}

/**
 * Making service call
 * @url - url to make request
 * @method - http request method
 * @params - http request params
 * */
public String makeServiceCall(String url, int method,
        List<NameValuePair> params) {
    try {
        // http client
        DefaultHttpClient httpClient = new DefaultHttpClient();
        HttpEntity httpEntity = null;
        HttpResponse httpResponse = null;

        // Checking http request method type
        if (method == POST) {
            HttpPost httpPost = new HttpPost(url);
            // adding post params
            if (params != null) {
                httpPost.setEntity(new UrlEncodedFormEntity(params));
            }

            httpResponse = httpClient.execute(httpPost);

        } else if (method == GET) {
            // appending params to url
            if (params != null) {
                String paramString = URLEncodedUtils
                        .format(params, "utf-8");
                url += "?" + paramString;
            }
            HttpGet httpGet = new HttpGet(url);

            httpResponse = httpClient.execute(httpGet);

        }
        System.out.println("Status in url =====" + httpResponse.getStatusLine().getStatusCode());
        httpEntity = httpResponse.getEntity();
        response = EntityUtils.toString(httpEntity);

    } catch (UnsupportedEncodingException e) {
        e.printStackTrace();
    } catch (ClientProtocolException e) {
        e.printStackTrace();
    } catch (IOException e) {
        e.printStackTrace();
    }

    return response;

}

静态字符串响应=null；
公共最终静态int GET=1；
公共最终静态int POST=2；
公共服务处理程序（）{
}
/**
*拨打服务电话
*@url-发出请求的url
*@method-http请求方法
* */
公共字符串makeServiceCall（字符串url，int方法）{
返回此.makeServiceCall（url，方法，null）；
}
/**
*拨打服务电话
*@url-发出请求的url
*@method-http请求方法
*@params-http请求参数
* */
公共字符串makeServiceCall（字符串url，int方法，
列表参数）{
试一试{
//http客户端
DefaultHttpClient httpClient=新的DefaultHttpClient（）；
HttpEntity HttpEntity=null；
HttpResponse HttpResponse=null；
//检查http请求方法类型
if（方法==POST）{
HttpPost HttpPost=新的HttpPost（url）；
//添加post参数
如果（参数！=null）{
setEntity（新的UrlEncodedFormEntity（参数））；
}
httpResponse=httpClient.execute（httpPost）；
}else if（方法==GET）{
//将参数附加到url
如果（参数！=null）{
String paramString=URLEncodedUtils
.格式（参数“utf-8”）；
url+=“？”+参数字符串；
}
HttpGet HttpGet=新的HttpGet（url）；
httpResponse=httpClient.execute（httpGet）；
}
System.out.println（“url中的状态===”+httpResponse.getStatusLine（）.getStatusCode（））；
httpEntity=httpResponse.getEntity（）；
response=EntityUtils.toString（httpEntity）；
}捕获（不支持的编码异常e）{
e、 printStackTrace（）；
}捕获（客户端协议例外e）{
e、 printStackTrace（）；
}捕获（IOE异常）{
e、 printStackTrace（）；
}
返回响应；
}

---

}

发布您的

JSON

响应@ṁᾶƔƏňツ 好的，我正在编辑@ṁᾶƔƏňツ 我已经编辑过了。我想你没有得到json响应，而是得到了一些html标记。检查您是否从服务器获得了正确的响应，然后发布

JSON

响应。关键是，就我们所知，您的代码可能完全正确。服务器没有返回JSON。这可能是服务器的问题，或者你可能点击了错误的URL，但我们无法从这里判断。嗨…我已经更新了我的问题…你现在能帮我吗？

<?php
    require('db_connect.php');    
   $response = array();            
   $username= $_POST['username'];       
   $email = $_POST['email'];            
   $password = $_POST['password'];              

        $query = "INSERT INTO `account` (username,email,password) VALUES ('$username', '$email', '$password')";
        $result = mysql_query($query); 
        if($result){
  $response["success"] = 1;
        $response["message"] = "account successfully created.";     
        // echoing JSON response
        echo json_encode($response);                
        }
        else
        {
             $response["success"] = 0;
        $response["message"] = "Oops! An error occurred.";

        // echoing JSON response
        echo json_encode($response);
         }
    ?>

10-06 12:31:09.800: D/my(11813): in onclick...create new account executed
10-06 12:31:09.800: D/my(11813): in doInBackground()
10-06 12:31:09.800: D/my(11813): getting inputs is executed
10-06 12:31:09.800: D/my(11813): parameter adding executed
10-06 12:31:09.800: D/my(11813): method equals POST is working
10-06 12:31:09.800: D/my(11813): HTTp client is working
10-06 12:31:09.800: D/my(11813): HTTp post is working
10-06 12:31:09.800: D/my(11813): url encoded
10-06 12:31:12.090: D/my(11813): HTTp response is working
10-06 12:31:12.090: D/my(11813): HTTp entity is working
10-06 12:31:12.090: D/my(11813): getcontent is working

$result = mysql_query("INSERT INTO accounts(email, password, username) 
    values ('$email','$password','$username')");

static String response = null;
public final static int GET = 1;
public final static int POST = 2;

public ServiceHandler() {

}

/**
 * Making service call
 * @url - url to make request
 * @method - http request method
 * */
public String makeServiceCall(String url, int method) {
    return this.makeServiceCall(url, method, null);
}

/**
 * Making service call
 * @url - url to make request
 * @method - http request method
 * @params - http request params
 * */
public String makeServiceCall(String url, int method,
        List<NameValuePair> params) {
    try {
        // http client
        DefaultHttpClient httpClient = new DefaultHttpClient();
        HttpEntity httpEntity = null;
        HttpResponse httpResponse = null;

        // Checking http request method type
        if (method == POST) {
            HttpPost httpPost = new HttpPost(url);
            // adding post params
            if (params != null) {
                httpPost.setEntity(new UrlEncodedFormEntity(params));
            }

            httpResponse = httpClient.execute(httpPost);

        } else if (method == GET) {
            // appending params to url
            if (params != null) {
                String paramString = URLEncodedUtils
                        .format(params, "utf-8");
                url += "?" + paramString;
            }
            HttpGet httpGet = new HttpGet(url);

            httpResponse = httpClient.execute(httpGet);

        }
        System.out.println("Status in url =====" + httpResponse.getStatusLine().getStatusCode());
        httpEntity = httpResponse.getEntity();
        response = EntityUtils.toString(httpEntity);

    } catch (UnsupportedEncodingException e) {
        e.printStackTrace();
    } catch (ClientProtocolException e) {
        e.printStackTrace();
    } catch (IOException e) {
        e.printStackTrace();
    }

    return response;

}