首先，我对这种东西不熟悉。我有一个注册活动的应用程序。除了成功/不成功尝试后的消息，一切正常。 Android工作室给了我
JSONException: Value of type java.lang.String cannot be converted to JSONObject
我完全不知道如何解决这个问题。这里的任何人至少可以帮助一下吗？谢谢！
package info.logirej.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 info.logirej.R;
import info.logirej.app.AppConfig;
import info.logirej.app.AppController;
import info.logirej.helper.SQLiteHandler;
import info.logirej.helper.SessionManager;
public class RegisterActivity extends Activity {
private static final String TAG = RegisterActivity.class.getSimpleName();
private Button btnRegister;
private Button btnLinkToLogin;
private EditText inputImie;
private EditText inputNazwisko;
private EditText inputEmail;
private EditText inputPassword;
private EditText inputPin;
private EditText inputTelefon;
private ProgressDialog pDialog;
private SessionManager session;
private SQLiteHandler db;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_register);
inputImie = (EditText) findViewById(R.id.imie);
inputNazwisko = (EditText) findViewById(R.id.nazwisko);
inputEmail = (EditText) findViewById(R.id.email);
inputPassword = (EditText) findViewById(R.id.password);
inputPin = (EditText) findViewById(R.id.pin);
inputTelefon = (EditText) findViewById(R.id.telefon);
btnRegister = (Button) findViewById(R.id.btnRegister);
btnLinkToLogin = (Button) findViewById(R.id.btnLinkToLoginScreen);
// Progress dialog
pDialog = new ProgressDialog(this);
pDialog.setCancelable(false);
// Session manager
session = new SessionManager(getApplicationContext());
// SQLite database handler
db = new SQLiteHandler(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(RegisterActivity.this,
MainActivity.class);
startActivity(intent);
finish();
}
// Register Button Click event
btnRegister.setOnClickListener(new View.OnClickListener() {
public void onClick(View view) {
String imie = inputImie.getText().toString().trim();
String nazwisko = inputNazwisko.getText().toString().trim();
String email = inputEmail.getText().toString().trim();
String password = inputPassword.getText().toString().trim();
String pin = inputPin.getText().toString().trim();
String telefon = inputTelefon.getText().toString().trim();
if (!imie.isEmpty() && !nazwisko.isEmpty() && !email.isEmpty() && !password.isEmpty() && !pin.isEmpty() && !telefon.isEmpty()) {
registerUser(imie, nazwisko, email, password, pin, telefon);
} else {
Toast.makeText(getApplicationContext(),
"Prosze wprowadzić dane!", Toast.LENGTH_LONG)
.show();
}
}
});
// Link to Login Screen
btnLinkToLogin.setOnClickListener(new View.OnClickListener() {
public void onClick(View view) {
Intent i = new Intent(getApplicationContext(),
LoginActivity.class);
startActivity(i);
finish();
}
});
}
/**
* Function to store user in MySQL database will post params(tag, name,
* email, password) to register url
* */
private void registerUser(final String imie, final String nazwisko, final String email, final String pin, final String telefon,
final String password) {
// Tag used to cancel the request
String tag_string_req = "req_register";
pDialog.setMessage("Tworzę konto");
showDialog();
StringRequest strReq = new StringRequest(Method.POST,
AppConfig.URL_REGISTER, new Response.Listener<String>() {
@Override
public void onResponse(String response) {
Log.d(TAG, "Stan rejestracji: " + response.toString());
hideDialog();
try {
JSONObject jObj = new JSONObject(response);
boolean error = jObj.getBoolean("error");
if (!error) {
// User successfully stored in MySQL
// Now store the user in sqlite
String uid = jObj.getString("uid");
JSONObject user = jObj.getJSONObject("user");
String imie = user.getString("imie");
String nazwisko = user.getString("nazwisko");
String email = user.getString("email");
String pin = user.getString("pin");
String telefon = user.getString("telefon");
String created_at = user
.getString("created_at");
// Inserting row in users table
db.addUser(imie, nazwisko, email, pin, telefon, uid, created_at);
Toast.makeText(getApplicationContext(), "Konto zostało utworzone! Zapraszamy do logowania!", Toast.LENGTH_LONG).show();
// Launch login activity
Intent intent = new Intent(
RegisterActivity.this,
LoginActivity.class);
startActivity(intent);
finish();
} else {
// Error occurred in registration. Get the error
// message
String errorMsg = jObj.getString("error_msg");
Toast.makeText(getApplicationContext(),
errorMsg, Toast.LENGTH_LONG).show();
}
} catch (JSONException e) {
e.printStackTrace();
}
}
}, new Response.ErrorListener() {
@Override
public void onErrorResponse(VolleyError error) {
Log.e(TAG, "Błąd rejestracji: " + error.getMessage());
Toast.makeText(getApplicationContext(),
error.getMessage(), Toast.LENGTH_LONG).show();
hideDialog();
}
}) {
@Override
protected Map<String, String> getParams() {
// Posting params to register url
Map<String, String> params = new HashMap<String, String>();
params.put("imie", imie);
params.put("nazwisko", nazwisko);
params.put("email", email);
params.put("password", password);
params.put("pin", pin);
params.put("telefon", telefon);
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();
}
}
答案 0 :(得分：0)
您的问题在以下一行：
JSONObject jObj = new JSONObject(response);
显然，您的回复是无效的JSON，因为我无法看到它是如何构建的，不能告诉您更多。
尝试在此处验证您的JSON响应 http://jsonlint.com/#