为什么在使用Android排球时，JSONObject的getBoolean总是返回false

Question

我正在使用android volley对RESTful API执行一些网络请求。当我使用邮递员在本地测试API时，它返回预期值'true'。当我使用AsyncTask从返回的JSON对象中获取布尔结果时，它也返回相同的'true'值。但是，当我使用volley执行相同操作时，即使返回的值实际为真，返回的JSON响应也始终为“false”。

这是我的RESTful API代码。

 $app->post('/login', function () use ($app) {

// reading post params
$email = $app->request()->post('email');
$password = $app->request()->post('password');
$response = array();

//$db = new DbHandler ();
// check for correct email and password
if (true) {
    // get the user by email
    //$user = $db->getUserByEmail($email);



    $response ['error'] = true;
    $response ['message'] = 'Login failed. Incorrect credentials';



} else {
    // user credentials are wrong
    $response ["error"] = false;
    $response ['message'] = "Login Successful";
}

   echoRespnse(200, $response);
 });

这是我使用邮递员

运行时返回的值

这是我的截击操作

public class LoginActivity extends AppCompatActivity {

private Button login;
private EditText email, password;
private boolean error;
private String message;

@Override
        public void onClick(View v) {

            final RegisterInBackground registerGCMID = new RegisterInBackground();
            //registerGCMID.execute();

            HashMap<String, String> params = new HashMap<String, String>();


            params.put("email", email.getText().toString());
            params.put("password", password.getText().toString());

            RequestQueue requestQueue = VolleySingleton.getInstance().getRequestQueue();
            JsonObjectRequest request = new JsonObjectRequest(Request.Method.POST, ApplicationConstants.url_sign_in, new JSONObject
                    (params), new Response.Listener<JSONObject>() {
                @Override
                public void onResponse(JSONObject response) {
                    try {
                        error = response.getBoolean(TAG_ERROR);
                        message = response.getString(TAG_MESSAGE);
                        Toast.makeText(LoginActivity.this, error + " value of error", Toast.LENGTH_LONG).show();
                    } catch (JSONException e) {
                        e.printStackTrace();
                    }


                    Toast.makeText(LoginActivity.this, message, Toast.LENGTH_SHORT).show();


                }
            }, new Response.ErrorListener() {
                @Override
                public void onErrorResponse(VolleyError error) {

                    //Toast.makeText(LoginActivity.this, error.getMessage(), Toast.LENGTH_SHORT).show();

                }
            });

            requestQueue.add(request);


   if (!error) { //when it reaches here the error changes from true to false
   //Toast.makeText(LoginActivity.this, error + "", Toast.LENGTH_SHORT).show();
                Intent i = new Intent(LoginActivity.this, SportSelection.class);
                startActivity(i);
                finish();
            }

然而，当我使用AsyncTask

执行完全相同的操作时它会起作用

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

    JSONObject json;
    //boolean error;
    String message, userEmail, accountType;

 @Override
    protected String doInBackground(String... args) {


        Intent i;

        List<NameValuePair> params = new ArrayList<NameValuePair>();

        params.add(new BasicNameValuePair("email", email.getText().toString()));
        params.add(new BasicNameValuePair("password", password.getText().toString()));

        json = jsonParser.makeHttpRequest(ApplicationConstants.url_sign_in, "POST", params);

        // check log cat for response
        //Log.d("Create Response", json.toString());

        try {
            error = json.getBoolean(TAG_ERROR);
            message = json.getString(TAG_MESSAGE);


            if (!error) {


                i = new Intent(LoginActivity.this.getApplicationContext(),
                        SportSelection.class);
                startActivity(i);
                LoginActivity.this.finish();


                //Log.d("Message is", message);
            }
        } catch (JSONException e) {

            e.printStackTrace();
        }

        return null;
    }

在为错误分配值为true后，错误值被更改为false是什么？