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Android Studio注册不起作用

[英]Android studio sign up not working

 原文  2017-08-23 19:38:57  6   1    java/ php/ android/ performance

问题描述

我正在使用android studio为android创建社交网络。 当我在所有字段中输入文本并单击Register没有任何反应。 我之前检查了Android Monitor并打印出我没有使用Internet权限。 所以我在中添加了它。 现在，我没有收到任何错误，单击“注册”后仍然没有任何反应。 当我单击注册时，如果注册成功，则用户的信息进入数据库，然后他们进入登录屏幕。 有人可以帮我解决这个问题吗？

Android清单： 

<uses-permission android:name="android.permission.INTERNET"/>
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE"/>

registeractivity.java： 

public class RegisterActivity extends AppCompatActivity {

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

    final EditText etUsername = (EditText) findViewById(R.id.etUsername);
    final EditText etPw = (EditText) findViewById(R.id.etPw);
    final EditText etEmail = (EditText) findViewById(R.id.etEmail);
    final Button bRegister = (Button) findViewById(R.id.bRegister);

    final TextView loginLink = (TextView) findViewById(R.id.tvLoginHere);

    loginLink.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            Intent loginIntent = new Intent(RegisterActivity.this, LoginActivity.class);
            RegisterActivity.this.startActivity(loginIntent);

        }
    });

    bRegister.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View view) {
            final String username = etUsername.getText().toString();
            final String pw = etPw.getText().toString();
            final String email = etEmail.getText().toString();

            if (etUsername.getText().toString().trim().length() <= 0) {
                Toast.makeText(RegisterActivity.this, "Username is empty", Toast.LENGTH_SHORT).show();
            }

            if (etPw.getText().toString().trim().length() <= 0) {
                Toast.makeText(RegisterActivity.this, "Password is empty", Toast.LENGTH_SHORT).show();
            }

            if (etEmail.getText().toString().trim().length() <= 0) {
                Toast.makeText(RegisterActivity.this, "E-mail is empty", Toast.LENGTH_SHORT).show();
            }

            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("Register Failed")
                                    .setNegativeButton("Retry", null)
                                    .create()
                                    .show();
                        }

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

                }
            };

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

registerrequest.java： 

public class RegisterRequest extends StringRequest {

private static final String REGISTER_REQUEST_URL = "http://hash.host22.com/register.php";
private Map<String, String> params;

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

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

}
}

register.php： 

 if(isset($_POST['bRegister'])) {

        if (empty($_POST["username"])) {
            echo"Fill in username to sign up";
                } else {

                if (empty($_POST["pw"])) {
                 echo"Fill in password to sign up";
                } else {

                if (empty($_POST["pw2"])) {
                echo"Confirm password to sign up";
                 } else {

                if (empty($_POST["email"])) {
                     echo"Fill in email to sign up";
                 } else {

                 if ($_POST['pw'] == $_POST['pw2']) {
                 $username = mysqli_real_escape_string($con, $_POST["username"]);
                 $pw= mysqli_real_escape_string($con, $_POST["pw"]);
                 $email = mysqli_real_escape_string($con, $_POST["email"]);

         $result = mysqli_query($con ,"SELECT * FROM users WHERE username='" . $username . "'");

                    if(mysqli_num_rows($result) > 0)
                    {
                    echo "Username exists";
                    } else {

                       $result2 = mysqli_query($con ,"SELECT * FROM users WHERE email='" . $email. "'");

                       if(mysqli_num_rows($result2) > 0)
                       {
                       echo "Email exist";
                       } else {

                       $pw = password_hash($pw, PASSWORD_BCRYPT, array('cost' => 14));          

               $sql = "INSERT INTO users (username, pw, email) VALUES('" . $username . "', '" . $pw . "', '" . $email . "')";
                       if(mysqli_query($con, $sql)){                                  
                       // if insert checked as successful echo username and password saved successfully
            echo"success";
                       }else{
                       echo mysqli_error($con);
                       }   

                    } } } else{
                              echo "The passwords do not match.";  // and send them back to registration page
            }}}}}
     }

请帮助谢谢。

1 个解决方案

解决方案1
 0  2017-08-23 20:00:14

我的应用程序上有一个注册活动，该活动使用一对与您相似的java文件（一个registerActivity和一个registerRequest），但是对于我的php文件，我使用了一些更简单的方法。 我将其发布在下面，如果需要，可以尝试一下，或者改编自己的代码以适合它，但是使用000webhost db对我而言，它的工作时间为100％。 

$con = mysqli_connect("host", "username", "password", "db_name");

$name = $_POST["name"];
$email = $_POST["email"];
$password = $_POST["password"];

$response = array();
$response["success"] = 0;  

$email_check = mysqli_query($con, "SELECT * FROM tableName WHERE email = '$email'");
if(mysqli_num_rows($email_check)) {
    $response["success"] = 1;
    echo json_encode($response);
    exit;
}

$statementR = mysqli_prepare($con, "INSERT INTO tableName (name, email, password) VALUES (?, ?, ?)");
mysqli_stmt_bind_param($statementR, "sss", $name, $email, $password);
mysqli_stmt_execute($statementR);


$statement = mysqli_prepare($con, "SELECT * FROM tableName WHERE email = ?");
mysqli_stmt_bind_param($statement, "s", $email);
mysqli_stmt_execute($statement);
mysqli_stmt_store_result($statement);
mysqli_stmt_bind_result($statement, $user_id, $name, $email, $password);

while(mysqli_stmt_fetch($statement)){
    $response["success"] = 2;  
    $response["user_id"] = $user_id;    
    $response["name"] = $name;
    $response["email"] = $email;

}

echo json_encode($response);

email_check方法检查是否已存在电子邮件，然后返回带有整数值的响应，然后由应用程序解释。

我的php脚本中没有任何密码/用户名检查，因为这一切都在应用程序端完成，因为它可以防止不必要的数据库调用（如果您愿意，我也可以发布该代码）。 如果愿意，您可以将服务器端数据检查添加到上面的代码中。

为您修改了register.php文件： 

$con = mysqli_connect("host", "username", "password", "db_name");

$name = $_POST["username"];
$email = $_POST["email"];
$pw = $_POST["pw"];

$response = array();
$response["success"] = 0;  

$email_check = mysqli_query($con, "SELECT * FROM users WHERE email = '$email'");
if(mysqli_num_rows($email_check)) {
    $response["success"] = 1;
    echo json_encode($response);
    exit;
}

$statementR = mysqli_prepare($con, "INSERT INTO users (username, pw, email) VALUES (?, ?, ?)");
mysqli_stmt_bind_param($statementR, "sss", $username, $pw, $email);
mysqli_stmt_execute($statementR);


$statement = mysqli_prepare($con, "SELECT * FROM users WHERE email = ?");
mysqli_stmt_bind_param($statement, "s", $email);
mysqli_stmt_execute($statement);
mysqli_stmt_store_result($statement);
mysqli_stmt_bind_result($statement, $username, $pw, $email);

while(mysqli_stmt_fetch($statement)){
    $response["success"] = 2;  
    $response["username"] = $username;    
    $response["pw"] = $pw;
    $response["email"] = $email;

}

echo json_encode($response);

同样在您的RegisterActivity中，将if(success){...}行更新为if(success == 2){...} 。

为了清楚起见，这是我的RegisterActivity（与您的非常相似）： 

public class RegisterActivity extends AppCompatActivity {

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

    final EditText registerName = (EditText) findViewById(R.id.registerName);
    final EditText registerEmail = (EditText) findViewById(R.id.registerEmail);
    final EditText registerPassword = (EditText) findViewById(R.id.registerPassword);
    final EditText registerConfirm = (EditText) findViewById(R.id.registerPasswordConfirm);

    final Button registerButton = (Button) findViewById(R.id.registerButton);

    final TextView registerLogInLink = (TextView) findViewById(R.id.registerLogInLink);

    registerButton.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            final String name = registerName.getText().toString();
            final String email = registerEmail.getText().toString();
            final String password = registerPassword.getText().toString();
            final String passwordCheck = registerConfirm.getText().toString();

            if(name.length() > 1 & email.length() > 5 & password.length() > 5 & password.equals(passwordCheck)) {

            Response.Listener<String> responseListener = new Response.Listener<String>() {
                @Override
                public void onResponse(String response) {
                    try {
                        System.out.println(response);
                        JSONObject jsonResponse = new JSONObject(response);
                        int success = jsonResponse.getInt("success");

                        System.out.println(jsonResponse);
                        System.out.println(success);

                        if (success == 2) {
                            Integer user_id = jsonResponse.getInt("user_id");
                            String name = jsonResponse.getString("name");
                            String email = jsonResponse.getString("email");

                            UserCredentials.setUserLoggedInStatus(getApplicationContext(), true);
                            UserCredentials.setLoggedInUserEmail(getApplicationContext(), email);
                            UserCredentials.setLoggedInUserName(getApplicationContext(), name);
                            UserCredentials.setLoggedInUserID(getApplicationContext(), user_id);

                            Intent intent = new Intent(RegisterActivity.this, MainScreen.class);
                            RegisterActivity.this.startActivity(intent);

                        } else if (success == 1) {
                            AlertDialog.Builder alertMessage = new AlertDialog.Builder(RegisterActivity.this);
                            alertMessage.setMessage("Registration failed, email already registered.")
                                    .setNegativeButton("Try again", null)
                                    .create()
                                    .show();

                        } else {
                            AlertDialog.Builder alertMessage = new AlertDialog.Builder(RegisterActivity.this);
                            alertMessage.setMessage("Registration failed, please try again")
                                    .setNegativeButton("Try again", new DialogInterface.OnClickListener() {
                                        public void onClick(DialogInterface dialog,int id) {
                                            RegisterActivity.this.recreate();}})

                                    .create().show();

                        }

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

                RegisterRequest registerRequest = new RegisterRequest(name, email, password, responseListener);
                RequestQueue queue = Volley.newRequestQueue(RegisterActivity.this);
                queue.add(registerRequest);

            } else if(name.length() > 1 & email.length() <= 5 & password.length() <=5) {
                AlertDialog.Builder alertMessage = new AlertDialog.Builder(RegisterActivity.this);
                alertMessage.setMessage("Registration failed, email and password invalid. Passwords must be more than 5 characters.")
                        .setNegativeButton("Retry", null)
                        .create()
                        .show();

            } else if(name.length() > 1 & email.length() <= 5 & password.length() > 5) {
                AlertDialog.Builder alertMessage = new AlertDialog.Builder(RegisterActivity.this);
                alertMessage.setMessage("Registration failed, email invalid.")
                        .setNegativeButton("Retry", null)
                        .create()
                        .show();

            } else if(name.length() > 1 & email.length() > 5 & password.length() <= 5) {
                AlertDialog.Builder alertMessage = new AlertDialog.Builder(RegisterActivity.this);
                alertMessage.setMessage("Registration failed, invalid password. Passwords must be more than 5 characters.")
                        .setNegativeButton("Retry", null)
                        .create()
                        .show();

            } else if(name.length() <= 1 & email.length() <= 5 & password.length() <=5) {
                AlertDialog.Builder alertMessage = new AlertDialog.Builder(RegisterActivity.this);
                alertMessage.setMessage("Registration failed, all credentials invalid.")
                        .setNegativeButton("Retry", null)
                        .create()
                        .show();

            } else if(name.length() <= 1 & email.length() <= 5 & password.length() > 5) {
                AlertDialog.Builder alertMessage = new AlertDialog.Builder(RegisterActivity.this);
                alertMessage.setMessage("Registration failed, name and email invalid.")
                        .setNegativeButton("Retry", null)
                        .create()
                        .show();

            } else if(name.length() <= 1 & email.length() > 5 & password.length() <= 5) {
                AlertDialog.Builder alertMessage = new AlertDialog.Builder(RegisterActivity.this);
                alertMessage.setMessage("Registration failed, name and password invalid. Passwords must be more than 5 characters.")
                        .setNegativeButton("Retry", null)
                        .create()
                        .show();

            }  else if(name.length() > 1 & email.length() > 5 & password.length() > 5 & !password.equals(passwordCheck)) {
                AlertDialog.Builder alertMessage = new AlertDialog.Builder(RegisterActivity.this);
                alertMessage.setMessage("Registration failed, passwords do not match.")
                        .setNegativeButton("Retry", null)
                        .create()
                        .show();

            } else {
                AlertDialog.Builder alertMessage = new AlertDialog.Builder(RegisterActivity.this);
                alertMessage.setMessage("Something went wrong, please try again.")
                        .setNegativeButton("Retry", null)
                        .create()
                        .show();
            }
        }
    });

    registerLogInLink.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            Intent LogInIntent = new Intent(RegisterActivity.this, LogInActivity.class);
            RegisterActivity.this.startActivity(LogInIntent);

        }
});

您可以忽略alertDialogs，除非您需要自定义警报，在这种情况下，可以随意复制它们。 还要确保您的RegisterRequest文件正在连接到正确的URL。

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