Question

几天以来，这个错误一次又一次地欢迎我，我不明白为什么。此外，我也不知道该如何解决。

我实际上有一个非常简单的SQL数据库形式的登录和注册原理。

创建它时，我遵循了本教程：https://www.youtube.com/playlist?list=PLe60o7ed8E-TztoF2K3y4VdDgT6APZ0ka我使用ProFreeHost而不是000webhost。但是，这不可能是原因。

这是两个php代码：

register.php

<?php
$con = mysqli_connect("sql310.unaux.com", "unaux_22474806", "***my password***", "unaux_22474806_m8finder");

$firstname = $_POST["firstname"];
$lastname = $_POST["lastname"];
$email = $_POST["email"];
$phonenumber = $_POST["phonenumber"];
$username = $_POST["username"];
$password = $_POST["password"];

$statement = mysqli_prepare($con, "INSERT INTO user (firstname, lastname, email, phonenumber, username, password) VALUES (?, ?, ?, ?, ?, ?)");
mysqli_stmt_bind_param($statement, "ssssss", $firstname, $lastname, $email, $phonenumber, $username, $password);
mysqli_stmt_execute($statement);

$response = array();
$response["success"] = true;

echo json_encode($response);
?>

login.php

<?php
$con = mysqli_connect("sql310.unaux.com", "unaux_22474806", "***my password***", "unaux_22474806_m8finder");

$username = $_POST["username"];
$password = $_POST["password"];

$statement = mysqli_prepare($con, "SELECT * FROM user WHERE username = ? AND password = ?");
mysqli_stmt_bind_param($statement, "ss", $username, $password);
mysqli_stmt_execute($statement);

mysqli_stmt_store_result($statement);
mysqli_stmt_bind_result($statement, $userID, $firstname, lastname, $email, phonenumber, $username, $password);

$response = array();
$response["success"] = false;

while(mysqli_stmt_fetch($statement)){
    $response["success"] = true;
    $response["firstname"] = $firstname;
    $response["lastname"] = $lastname;
    $response["email"] = $email;
    $response["phonenumber"] = $phonenumber;
    $response["username"] = $username;
    $response["password"] = $password;
}

echo json_encode($response);
?>

这是我的Java代码： RegisterRequest.java

public class RegisterRequest extends StringRequest {
private static final String REGISTER_REQUEST_URL = "http://m8finder.unaux.com/register.php";
private Map<String, String> params;

public RegisterRequest(String firstname, String lastname, String email, String phonenumber, String username, String password, Response.Listener<String> listener) {
    super(Method.POST, REGISTER_REQUEST_URL, listener, null);
    params = new HashMap<>();
    params.put("firstname", firstname);
    params.put("lastname", lastname);
    params.put("email", email);
    params.put("phonenumber", phonenumber);
    params.put("username", username);
    params.put("password", password);
}

@Override
public Map<String, String> getParams() {
    return params;
}}

RegisterActivity.java

public class RegisterActivity extends AppCompatActivity implements View.OnClickListener{

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

    final EditText editName = (EditText) findViewById(R.id.editName);
    final EditText editLastName = (EditText) findViewById(R.id.editLastName);
    final EditText editMail = (EditText) findViewById(R.id.editMail);
    final EditText editHandynummer = (EditText) findViewById(R.id.editHandynummer);
    final EditText editUsername = (EditText) findViewById(R.id.editUsername1);
    final EditText editPassword = (EditText) findViewById(R.id.editPassword1);
    final CardView register = (CardView) findViewById(R.id.card_register);

    register.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            final String firstname = editName.getText().toString();
            final String lastname = editLastName.getText().toString();
            final String email = editMail.getText().toString();
            final String phonenumber = editHandynummer.getText().toString();
            final String username = editUsername.getText().toString();
            final String password = editPassword.getText().toString();


            Response.Listener<String> responseListener = new Response.Listener<String>() {
                @Override
                public void onResponse(String response) {
                    try {
                        JSONObject jsonResponse = new JSONObject(response);
                        boolean success = jsonResponse.getBoolean("success");
                        if (success) {
                            Intent intent = new Intent(RegisterActivity.this, LoginActivity.class);
                            RegisterActivity.this.startActivity(intent);
                        } else {
                            AlertDialog.Builder builder = new AlertDialog.Builder(RegisterActivity.this);
                            builder.setMessage("Registrierung fehlgeschlagen.")
                                    .setNegativeButton("Erneut versuchen.", null)
                                    .create()
                                    .show();
                        }
                    } catch (JSONException e) {
                        e.printStackTrace();
                    }
                }
            };

            RegisterRequest registerRequest = new RegisterRequest(firstname, lastname, email, phonenumber, username, password, responseListener);
            RequestQueue queue = Volley.newRequestQueue(RegisterActivity.this);
            queue.add(registerRequest);
        }
    });

    CardView card_back = (CardView) findViewById(R.id.card_back);
    card_back.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            onBackPressed();
        }
    });

    CardView card_hilfe = (CardView) findViewById(R.id.card_hilfe);
    card_hilfe.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            Intent in = new Intent(getApplicationContext(),DataHelpActivity.class);
            startActivity(in);
        }
    });
}

@Override
public void onClick(View v) {
}}

LoginRequest

public class LoginRequest extends StringRequest {
private static final String LOGIN_REQUEST_URL = "http://m8finder.unaux.com/login.php";
private Map<String, String> params;

public LoginRequest(String username, String password, Response.Listener<String> listener) {
    super(Method.POST, LOGIN_REQUEST_URL, listener, null);
    params = new HashMap<>();
    params.put("username", username);
    params.put("password", password);
}

@Override
public Map<String, String> getParams() {
    return params;
}}

LoginActivity

public class LoginActivity extends AppCompatActivity implements View.OnClickListener{

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

    final EditText editUsername = (EditText) findViewById(R.id.editUsername);
    final EditText editPassword = (EditText) findViewById(R.id.editPassword);
    final CardView login = (CardView) findViewById(R.id.card_login);

    login.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            final String username = editUsername.getText().toString();
            final String password = editPassword.getText().toString();

            // Response received from the server
            Response.Listener<String> responseListener = new Response.Listener<String>() {
                @Override
                public void onResponse(String response) {
                    try {
                        JSONObject jsonResponse = new JSONObject(response);
                        boolean success = jsonResponse.getBoolean("success");

                        if (success) {
                            String firstname = jsonResponse.getString("firstname");
                            String lastname = jsonResponse.getString("lastname");
                            String phonenumber = jsonResponse.getString("phonenumber");

                            Intent intent = new Intent(LoginActivity.this, MainActivity.class);
                            intent.putExtra("firstname", firstname);
                            intent.putExtra("lastname", lastname);
                            intent.putExtra("phonenumber", phonenumber);
                            intent.putExtra("username", username);
                            LoginActivity.this.startActivity(intent);
                        } else {
                            AlertDialog.Builder builder = new AlertDialog.Builder(LoginActivity.this);
                            builder.setMessage("Einloggen fehlgeschlagen.")
                                    .setNegativeButton("Nochmal versuchen.", null)
                                    .create()
                                    .show();
                        }

                    } catch (JSONException e) {
                        e.printStackTrace();
                    }
                }
            };

            LoginRequest loginRequest = new LoginRequest(username, password, responseListener);
            RequestQueue queue = Volley.newRequestQueue(LoginActivity.this);
            queue.add(loginRequest);
        }
    });

    CardView card_back = (CardView) findViewById(R.id.card_back);
    card_back.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            onBackPressed();
        }
    });

    CardView card_forget = (CardView) findViewById(R.id.card_forget);
    card_forget.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            Intent in = new Intent(getApplicationContext(),PasswortActivity.class);
            startActivity(in);
        }
    });
}

@Override
public void onClick(View v) {
}}

我知道有很多代码需要阅读。因此，我非常感谢大家通读。

当我单击“注册”或“登录”时，没有任何反应，但该应用程序也没有崩溃。日志总是显示以下内容：

07-29 19：17：01.267 25567-25567 / com.matefinder.dgb.matefinder W / System.err：at com.matefinder.dgb.matefinder.RegisterActivity $ 1 $ 1.onResponse（RegisterActivity.java:49）在com.matefinder.dgb.matefinder.RegisterActivity $ 1 $ 1.onResponse（RegisterActivity.java:45）在com.android.volley.toolbox.StringRequest.deliverResponse（StringRequest.java:60）在com.android.volley.toolbox.StringRequest.deliverResponse（StringRequest.java:30）在com.android.volley.ExecutorDelivery $ ResponseDeliveryRunnable.run（ExecutorDelivery.java:99）在android.os.Handler.handleCallback（Handler.java:751）在android.os.Handler.dispatchMessage（Handler.java:95）在android.os.Looper.loop（Looper.java:154）在android.app.ActivityThread.main（ActivityThread.java:6682）在java.lang.reflect.Method.invoke（本机方法）在com.android.internal.os.ZygoteInit $ MethodAndArgsCaller.run（ZygoteInit.java:1520）在com.android.internal.os.ZygoteInit.main（ZygoteInit.java:1410） 07-29 19：17：04.725 25567-25567 / com.matefinder.dgb.matefinder D / ViewRootImpl @ 55e117b [RegisterActivity]：ViewPostImeInputStage processPointer 0 07-29 19：17：04.818 25567-25567 / com.matefinder.dgb.matefinder D / ViewRootImpl @ 55e117b [RegisterActivity]：ViewPostImeInputStage processPointer 1 07-29 19：17：04.822 25567-29431 / com.matefinder.dgb.matefinder I / System.out：（HTTPLog）-静态：isSBSettingEnabled false （HTTPLog）-静态：isSBSettingEnabled false 07-29 19：17：04.825 25567-29431 / com.matefinder.dgb.matefinder E / Volley：[40983] BasicNetwork.performRequest：http://m8finder.unaux.com/register.php的意外响应代码400

如果有人发现我的错误并向我展示或帮助我解决，我将非常感谢。附录包含MySQL表结构的屏幕截图。

此致

杰瑞

为何-E / Volley：[40983] BasicNetwork.performRequest：意外的响应代码400

0 个答案: