[Android] 로그인&회원가입 기능(2) - 중복체크(php, 프로젝트 소스코드 포함)

 

 

https://haruvely.tistory.com/32 1편입니다

 

+) 아이디 중복체크 기능 추가

 

 

 

<ValidateRequest.java>

public class ValidateRequest extends StringRequest {
    //서버 url 설정(php파일 연동)
    final static  private String URL="http://ip:port/UserValidate.php";
    private Map<String,String> map;

    public ValidateRequest(String userID, Response.Listener<String>listener){
        super(Method.POST,URL,listener,null);

        map=new HashMap<>();
        map.put("userID",userID);
    }

    @Override
    protected Map<String, String> getParams() throws AuthFailureError {
        return map;
    }
}

ip:port 사용하시는 ip, port 번호로 바꿔주시면 됩니다

 

 

<activity_register.xml>

<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.ConstraintLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context=".RegisterActivity">

    <EditText
        android:id="@+id/et_id"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginStart="8dp"
        android:layout_marginLeft="8dp"
        android:layout_marginTop="200dp"
        android:layout_marginEnd="8dp"
        android:layout_marginRight="8dp"
        android:ems="10"
        android:hint="아이디"
        android:inputType="textPersonName"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="parent" />

    <EditText
        android:id="@+id/et_pass"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginTop="16dp"
        android:ems="10"
        android:hint="비밀번호"
        android:inputType="textPersonName"
        app:layout_constraintEnd_toEndOf="@+id/et_id"
        app:layout_constraintStart_toStartOf="@+id/et_id"
        app:layout_constraintTop_toBottomOf="@+id/et_id" />

    <EditText
        android:id="@+id/et_name"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginTop="16dp"
        android:ems="10"
        android:hint="이름"
        android:inputType="textPersonName"
        app:layout_constraintEnd_toEndOf="@+id/et_pass"
        app:layout_constraintStart_toStartOf="@+id/et_pass"
        app:layout_constraintTop_toBottomOf="@+id/et_pass" />

    <EditText
        android:id="@+id/et_age"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginTop="16dp"
        android:ems="10"
        android:hint="나이"
        android:inputType="textPersonName"
        app:layout_constraintEnd_toEndOf="@+id/et_name"
        app:layout_constraintStart_toStartOf="@+id/et_name"
        app:layout_constraintTop_toBottomOf="@+id/et_name" />

    <Button
        android:id="@+id/btn_register"
        android:layout_width="0dp"
        android:layout_height="wrap_content"
        android:layout_marginTop="16dp"
        android:text="회원가입"
        app:layout_constraintEnd_toEndOf="@+id/et_age"
        app:layout_constraintStart_toStartOf="@+id/et_age"
        app:layout_constraintTop_toBottomOf="@+id/et_age" />

    <Button
        android:id="@+id/btn_validateCheck"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginStart="8dp"
        android:layout_marginTop="200dp"
        android:text="중복체크"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toEndOf="@+id/et_id"
        app:layout_constraintTop_toTopOf="parent" />

</androidx.constraintlayout.widget.ConstraintLayout>

 

 

 

<RegisterActivity.java>

public class RegisterActivity extends AppCompatActivity {

    private EditText et_id, et_pass, et_name, et_age;
    private Button btn_register, btn_validateCheck;
    private AlertDialog dialog;
    private boolean validate = false;

    @Override
    protected void onCreate(Bundle savedInstanceState) { // 액티비티 시작시 처음으로 실행되는 생명주기!
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_register);

        // 아이디 값 찾아주기
        et_id = findViewById(R.id.et_id);
        et_pass = findViewById(R.id.et_pass);
        et_name = findViewById(R.id.et_name);
        et_age = findViewById(R.id.et_age);

        // 아이디 중복 체크
        btn_validateCheck = findViewById(R.id.btn_validateCheck);
        btn_validateCheck.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                String userID = et_id.getText().toString();
                if (validate) {
                    return; // 검증 완료
                }
                if (userID.equals("")) {
                    AlertDialog.Builder builder = new AlertDialog.Builder(RegisterActivity.this);
                    dialog = builder.setMessage("아이디를 입력하세요.").setPositiveButton("확인", null).create();
                    dialog.show();
                    return;
                }
                Response.Listener<String> responseListener = new Response.Listener<String>() {
                    @Override
                    public void onResponse(String response) {
                        try {
                            Log.d("response1 : ", response);
                            JSONObject jsonResponse = new JSONObject(response);
                            boolean success = jsonResponse.getBoolean("success");

                            if (success) {
                                AlertDialog.Builder builder = new AlertDialog.Builder(RegisterActivity.this);
                                dialog = builder.setMessage("사용할 수 있는 아이디입니다.").setPositiveButton("확인", null).create();
                                dialog.show();
                                et_id.setEnabled(false); //아이디값 고정
                                validate = true; //검증 완료
                                btn_validateCheck.setBackgroundColor(getResources().getColor(R.color.colorGray));
                            }
                            else {
                                AlertDialog.Builder builder = new AlertDialog.Builder(RegisterActivity.this);
                                dialog = builder.setMessage("이미 존재하는 아이디입니다.").setNegativeButton("확인", null).create();
                                dialog.show();
                            }
                        } catch (JSONException e) {
                            e.printStackTrace();
                        }
                    }
                };
                ValidateRequest validateRequest = new ValidateRequest(userID,responseListener);
                RequestQueue queue = Volley.newRequestQueue(RegisterActivity.this);
                queue.add(validateRequest);
            }
        });

        // 회원가입 버튼 클릭 시 수행
        btn_register = findViewById(R.id.btn_register);
        btn_register.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                // EditText에 현재 입력되어있는 값을 get(가져온다)해온다.
                String userID = et_id.getText().toString();
                String userPass = et_pass.getText().toString();
                String userName = et_name.getText().toString();
                int userAge = Integer.parseInt(et_age.getText().toString());

                if(validate) {
                    Response.Listener<String> responseListener = new Response.Listener<String>() {
                        @Override
                        public void onResponse(String response) {
                            try {
                                Log.d("response2 : ", response);
                                JSONObject jsonObject = new JSONObject(response);
                                boolean success = jsonObject.getBoolean("success");
                                if (success) { // 회원등록에 성공한 경우
                                    Toast.makeText(getApplicationContext(), "회원 등록에 성공하였습니다.", Toast.LENGTH_SHORT).show();
                                    Intent intent = new Intent(RegisterActivity.this, LoginActivity.class);
                                    startActivity(intent);
                                } else { // 회원등록에 실패한 경우
                                    Toast.makeText(getApplicationContext(), "회원 등록에 실패하였습니다.", Toast.LENGTH_SHORT).show();
                                    return;
                                }
                            } catch (JSONException e) {
                                e.printStackTrace();
                            }
                        }
                    };
                    // 서버로 Volley를 이용해서 요청을 함.
                    RegisterRequest registerRequest = new RegisterRequest(userID, userPass, userName, userAge, responseListener);
                    RequestQueue queue = Volley.newRequestQueue(RegisterActivity.this);
                    queue.add(registerRequest);
                } else {
                    AlertDialog.Builder builder = new AlertDialog.Builder(RegisterActivity.this);
                    dialog = builder.setMessage("아이디 중복체크 해주세요.").setNegativeButton("확인", null).create();
                    dialog.show();
                }
            }
        });

    }
}

 

 

 

<UserValidate.php>

<?php
    $con = mysqli_connect("127.0.0.1:3310", "root", "1233", "user");
    mysqli_query($con,'SET NAMES utf8');

    $userID = isset($_POST["userID"]) ? $_POST["userID"] : "";
        
    $statement = mysqli_prepare($con, "SELECT * FROM user WHERE userID = ?");
    mysqli_stmt_bind_param($statement, "s", $userID);
    mysqli_stmt_execute($statement);

    $response = array();
    $response["success"] = true;
 
    while(mysqli_stmt_fetch($statement)) {
        $response["success"] = false;
        $response["userID"] = $userID;
    }

    echo json_encode($response);

?>

 

 

 

궁금한 점은 댓글 남겨주세요

 

감사합니다