我一直在用安卓上的凌空，似乎我真的不能让这个特别的部分工作
这是我的json

{
  "code": 1,
  "status": ​200,
  "data": "bla... bla..."
}

这是活动课

try
{
    JSONObject json_response = new JSONObject(response);
    String status = json_response.getString("status");

    if (status.equals("200"))
    {
        do something
    }
    else
    {
        Toast.makeText(getApplicationContext(), status, Toast.LENGTH_LONG).show();
    }
}

它总是跳过该条件，因为它不匹配，toast打印值200作为状态返回值的证明，并且该值是200
我试过了

int status = json_response.getInt("status");

if (status == 200)

哪个返回“jsonexception:java.lang.string类型的值不能转换为jsonobject”，有什么见解吗？
编辑：
下面是完整的loginactivity.java

package my.sanik.loginandregistration.activity;

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

import com.android.volley.Request.Method;
import com.android.volley.Response;
import com.android.volley.VolleyError;
import com.android.volley.toolbox.StringRequest;

import org.json.JSONException;
import org.json.JSONObject;

import java.util.HashMap;
import java.util.Map;

import my.sanik.loginandregistration.R;
import my.sanik.loginandregistration.app.AppConfig;
import my.sanik.loginandregistration.app.AppController;
import my.sanik.loginandregistration.helper.SessionManager;

public class LoginActivity extends Activity
{
    private static final String TAG = RegisterActivity.class.getSimpleName();
    private Button btnLogin;
    private Button btnLinkToRegister;
    private EditText inputEmail;
    private EditText inputPassword;
    private ProgressDialog pDialog;
    private SessionManager session;

    @Override
    public void onCreate(Bundle savedInstanceState)
    {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_login);

        inputEmail = (EditText) findViewById(R.id.email);
        inputPassword = (EditText) findViewById(R.id.password);
        btnLogin = (Button) findViewById(R.id.btnLogin);
        btnLinkToRegister = (Button) findViewById(R.id.btnLinkToRegisterScreen);

        // Progress dialog
        pDialog = new ProgressDialog(this);
        pDialog.setCancelable(false);

        // Session manager
        session = new SessionManager(getApplicationContext());

        // Check if user is already logged in or not
        if (session.isLoggedIn())
        {
            // User is already logged in. Take him to main activity
            Intent intent = new Intent(LoginActivity.this, MainActivity.class);
            startActivity(intent);
            finish();
        }

        // Login button Click Event
        btnLogin.setOnClickListener(new View.OnClickListener()
        {
            public void onClick(View view)
            {
                String email = inputEmail.getText().toString().trim();
                String password = inputPassword.getText().toString().trim();

                // Check for empty data in the form
                if (!email.isEmpty() && !password.isEmpty())
                {
                    // login user
                    checkLogin(email, password);
                }
                else
                {
                    // Prompt user to enter credentials
                    Toast.makeText(getApplicationContext(), "Please enter the credentials!", Toast.LENGTH_LONG).show();
                }
            }

        });

        // Link to Register Screen
        btnLinkToRegister.setOnClickListener(new View.OnClickListener()
        {
            public void onClick(View view)
            {
                Intent i = new Intent(getApplicationContext(), RegisterActivity.class);
                startActivity(i);
                finish();
            }
        });

    }

    private void checkLogin(final String email, final String password)
    {
        // Tag used to cancel the request
        String tag_string_req = "req_login";

        pDialog.setMessage("Logging in ...");
        showDialog();

        StringRequest strReq = new StringRequest(Method.POST, AppConfig.URL_LOGIN, new Response.Listener<String>()
        {
            @Override
            public void onResponse(String response)
            {
                Log.d(TAG, "Login Response: " + response.toString());
                hideDialog();

                try
                {
                    JSONObject json_response = new JSONObject(response);
                    String status = json_response.getString("status");

                    if (status.equals("200"))
                    {
                        session.setLogin(true);

                        // Launch main activity
                        Intent intent = new Intent(LoginActivity.this, MainActivity.class);
                        startActivity(intent);
                        finish();
                    }
                    else
                    {
                        // Error in login. Get the error message
                        Toast.makeText(getApplicationContext(), "Wrong username or password", Toast.LENGTH_LONG).show();
                    }
                }
                catch (JSONException e)
                {
                    // JSON error
                    e.printStackTrace();
                    Toast.makeText(getApplicationContext(), "Json error: " + e.getMessage(), Toast.LENGTH_LONG).show();
                }
            }
        }, new Response.ErrorListener()
        {

            @Override
            public void onErrorResponse(VolleyError error)
            {
                Log.e(TAG, "Login Error: " + error.getMessage());
                Toast.makeText(getApplicationContext(), error.getMessage(), Toast.LENGTH_LONG).show();
                hideDialog();
            }
        }) {

            @Override
            protected Map<String, String> getParams()
            {
                // Posting parameters to login url
                Map<String, String> params = new HashMap<>();
                params.put("email", email);
                params.put("password", password);

                return params;
            }

        };

        // Adding request to request queue
        AppController.getInstance().addToRequestQueue(strReq, tag_string_req);
    }

    private void showDialog()
    {
        if (!pDialog.isShowing()) pDialog.show();
    }

    private void hideDialog()
    {
        if (pDialog.isShowing()) pDialog.dismiss();
    }
}