안드로이드 - Volley 로 웹요청하고 응답받기2 - Post방식 , 로그인-회원가입 (php,mysql 연동)

[ 회원테이블 - test_member ]

필자는 mysql, php 과 교신하여 안드로이드 예제앱을 만들어 보았다.

[ AndroidManifest.xml ]

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

[ build.gradle ] (앱 수준)

	
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			dependencies {
.....
    implementation 'com.android.volley:volley:1.1.0'
}
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			cs
		

위의 사진을 보면 MainActivity 에서 최초 로그인과 회원가입 버튼이 처음에 나타나게 되고,

로그인 화면 LoginActivity 와 로그인 POST 웹요청응답 처리를 하는 LoginRequest 클래스와

회원가입 화면 RegisterActivity 와 회원가입 POST 웹요청응답 처리를 하는 RegisterRequest 클래스로 어우러지게 하였다.

[ activity_main.xml ]

	
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			<?xml version="1.0" encoding="utf-8"?>
<LinearLayout 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"
    android:orientation="vertical"
    tools:context=".MainActivity">
 
    <TextView
        android:id="@+id/textView"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:gravity="center"
        android:layout_marginTop="20dp"
        android:text="회원가입 및 로그인 테스트"
        android:textSize="30dp"/>
 
    <FrameLayout
        android:id="@+id/frame1"
        android:layout_width="match_parent"
        android:layout_height="match_parent">
 
        <LinearLayout
            android:id="@+id/logoff_layout"
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:visibility="visible"
            android:orientation="vertical">
 
            <Button
                android:id="@+id/btn_login"
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:text="로그인"
                android:textSize="20dp"/>
            <Button
                android:id="@+id/btn_register"
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:text="회원가입"
                android:textSize="20dp"/>
        </LinearLayout>
 
        <LinearLayout
            android:id="@+id/logon_layout"
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:visibility="invisible"
            android:orientation="vertical">
 
            <TextView
                android:id="@+id/txt_login"
                android:layout_marginTop="20dp"
                android:textSize="20dp"
                android:layout_width="match_parent"
                android:layout_height="wrap_content"/>
            <Button
                android:id="@+id/btn_logout"
                android:text="로그아웃"
                android:textSize="20dp"
                android:layout_width="match_parent"
                android:layout_height="wrap_content"/>
        </LinearLayout>
 
    </FrameLayout>
</LinearLayout>
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			cs
		

위의 소스에서는 25라인, 46라인처럼 logoff_layout, logon_layout 으로 각각 로그인상태, 로그아웃상태에 따라서 구분되도록 구성하였다.

[ activity_register.xml ] - 회원가입 디자인

	
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			<?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">
 
    <TextView
        android:id="@+id/textView3"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_marginTop="116dp"
        android:gravity="center"
        android:text="회원가입"
        android:textSize="40dp"
        app:layout_constraintTop_toTopOf="parent"
        tools:layout_editor_absoluteX="0dp" />
 
    <EditText
        android:id="@+id/register_et_id"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_marginTop="40dp"
        android:hint="아이디"
        app:layout_constraintTop_toBottomOf="@+id/textView3"
        tools:layout_editor_absoluteX="0dp" />
 
    <EditText
        android:id="@+id/register_et_pw"
        android:inputType="textPassword"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_marginTop="40dp"
        android:hint="비밀번호"
        app:layout_constraintTop_toBottomOf="@+id/register_et_id"
        tools:layout_editor_absoluteX="0dp" />
 
    <EditText
        android:id="@+id/register_et_name"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_marginTop="40dp"
        android:hint="이름"
        app:layout_constraintTop_toBottomOf="@+id/register_et_pw"
        tools:layout_editor_absoluteX="0dp" />
 
    <EditText
        android:id="@+id/register_et_age"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_marginTop="40dp"
        android:inputType="number"
        android:hint="나이"
        app:layout_constraintTop_toBottomOf="@+id/register_et_name"
        tools:layout_editor_absoluteX="0dp" />
 
    <Button
        android:id="@+id/register_btn1"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_marginTop="40dp"
        android:text="Register"
        android:textSize="38dp"
        app:layout_constraintTop_toBottomOf="@+id/register_et_age"
        tools:layout_editor_absoluteX="-16dp" />
 
</androidx.constraintlayout.widget.ConstraintLayout>
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			cs
		

[ json_register_test_member.php ] - post방식으로 회원가입 응답결과처리용 php파일

	
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			<?
header("Content-Type:application/json");
include "../inc/config_noHeader.php";
 
$arr = array();
if ($_SERVER["REQUEST_METHOD"]=="POST") {
    
    $user_id    = trim($_POST[user_id]);
    $user_pw    = trim($_POST[user_pw]);
    $user_name    = trim($_POST[user_name]);
    $age        = trim($_POST[age]);
 
    $user_id    = addslashes($user_id);
    $user_pw    = addslashes($user_pw);
    $user_name    = addslashes($user_name);
    $user_age    = addslashes($user_age);
 
    $reg_date = time();
 
    $query = "insert into test_member (user_id,user_pw,user_name,age,reg_date) values ('$user_id','$user_pw','$user_name','$user_age','$reg_date')";
    if (mysql_query($query)) {
        $arr["success"] = "1";
    } else {
        $arr["success"] = "-1";
    }
 
} else {
    $arr["success"] = "error";
}
echo json_encode($arr,JSON_PRETTY_PRINT+JSON_UNESCAPED_UNICODE);
?>
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			cs
		

[ RegisterRequest.java ] - POST 방식으로 웹요청할 회원가입 클래스

	
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			import com.android.volley.AuthFailureError;
import com.android.volley.Response;
import com.android.volley.toolbox.StringRequest;
 
import java.util.HashMap;
import java.util.Map;
 
public class RegisterRequest extends StringRequest {
 
    private final static String URL = "http://도메인주소/json/json_register_test_member.php";
    private Map<String, String> map;
 
    public RegisterRequest(String user_id, String user_pw, String user_name, int user_age, Response.Listener<String> listener, Response.ErrorListener errorListener) {
        super(Method.POST,URL, listener, errorListener);
 
        map = new HashMap<>();
        map.put("user_id",user_id);
        map.put("user_pw",user_pw);
        map.put("user_name",user_name);
        map.put("user_age",Integer.toString(user_age));
    }
 
    @Override
    protected Map<String, String> getParams() throws AuthFailureError {
        return map;
    }
}
 
Colored by Color Scripter

			cs
		

위 소스에서 24라인의 getParams() 가 POST 방식으로 보내질 매개변수들을 해시맵형태로 모아서 보내준다.

[ RegisterActivity.java ]

	
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			import androidx.appcompat.app.AppCompatActivity;
import android.content.Intent;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.Toast;
 
import com.android.volley.RequestQueue;
import com.android.volley.Response;
import com.android.volley.VolleyError;
import com.android.volley.toolbox.Volley;
 
import org.json.JSONException;
import org.json.JSONObject;
 
public class RegisterActivity extends AppCompatActivity {
 
    private EditText register_et_id,register_et_pw,register_et_name,register_et_age;
    private Button register_btn1;
 
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_register);
 
        register_et_id = findViewById(R.id.register_et_id);
        register_et_pw = findViewById(R.id.register_et_pw);
        register_et_name = findViewById(R.id.register_et_name);
        register_et_age = findViewById(R.id.register_et_age);
        register_btn1 = findViewById(R.id.register_btn1);
 
        register_btn1.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                register();
            }
        });
    }
 
    private void register() {
        String user_id = register_et_id.getText().toString();
        String user_pw = register_et_pw.getText().toString();
        String user_name = register_et_name.getText().toString();
        int user_age = Integer.parseInt(register_et_age.getText().toString());
 
        Response.Listener<String> resposneListener = new Response.Listener<String>() {
            @Override
            public void onResponse(String response) {
                try {
                    JSONObject jsonObject = new JSONObject(response);
                    String success = jsonObject.getString("success");
                    if (success != null && success.equals("1")) {  // 회원가입 완료
                        Toast.makeText(getApplicationContext(),"회원가입 성공!",Toast.LENGTH_SHORT).show();
                        Intent intent = new Intent(RegisterActivity.this,LoginActivity.class);
                        startActivity(intent);
                        finish();
                    } else {
                        Toast.makeText(getApplicationContext(),"회원가입 실패!",Toast.LENGTH_SHORT).show();
                        return;
                    }
                } catch (JSONException e) {
                    e.printStackTrace();
                }
            }
        };
 
        Response.ErrorListener errorListener = new Response.ErrorListener() {
            @Override
            public void onErrorResponse(VolleyError error) {
                Toast.makeText(getApplicationContext(),"회원가입 처리시 에러발생!",Toast.LENGTH_SHORT).show();
                return;
            }
        };
 
        // Volley 로 회원양식 웹으로 전송
        RegisterRequest registerRequest = new RegisterRequest(user_id,user_pw,user_name,user_age,resposneListener,errorListener);
        registerRequest.setShouldCache(false);
 
        RequestQueue queue = Volley.newRequestQueue(getApplicationContext());
        queue.add(registerRequest);
    }
}
Colored by Color Scripter

			cs
		

51라인부터 보면 응답성공시에 나오는 부분이다.

json_register_test_member.php 에 회원가입관련 정보를 POST방식으로 보내면 그 응답결과를

{"success":"1"} 이나 {"success":"error"} 등의 json 결과물을 받을수 있다.

이 값을 JSONObject의 객체형태로 변환시켜 받아 볼수 있다. 추가로 대괄호 형태의 json 결과물은 JSONArray 형태로 받으면 된다.

[ activity_login.xml ] - 로그인 디자인

	
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			<?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=".LoginActivity">
 
    <TextView
        android:id="@+id/textView2"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_marginTop="132dp"
        android:gravity="center"
        android:text="로그인"
        android:textSize="40dp"
        app:layout_constraintTop_toTopOf="parent"
        tools:layout_editor_absoluteX="0dp" />
 
    <LinearLayout
        android:id="@+id/linearLayout"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:orientation="horizontal"
        app:layout_constraintTop_toBottomOf="@+id/textView2"
        tools:layout_editor_absoluteX="-16dp">
 
        <TextView
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="아이디 : "
            android:textSize="30dp" />
 
        <EditText
            android:id="@+id/login_et_id"
            android:layout_width="match_parent"
            android:layout_height="wrap_content" />
    </LinearLayout>
 
    <LinearLayout
        android:id="@+id/linearLayout2"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_marginTop="42dp"
        android:orientation="horizontal"
        app:layout_constraintTop_toBottomOf="@+id/linearLayout"
        tools:layout_editor_absoluteX="0dp">
 
        <TextView
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="비밀번호 : "
            android:textSize="30dp" />
 
        <EditText
            android:id="@+id/login_et_pw"
            android:inputType="textPassword"
            android:layout_width="match_parent"
            android:layout_height="wrap_content" />
    </LinearLayout>
 
    <Button
        android:id="@+id/login_btn1"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_marginTop="52dp"
        android:text="Log in"
        android:textSize="28dp"
        app:layout_constraintTop_toBottomOf="@+id/linearLayout2"
        tools:layout_editor_absoluteX="0dp" />
 
</androidx.constraintlayout.widget.ConstraintLayout>
Colored by Color Scripter

			cs
		

[ json_login_test_member.php ] - post방식으로 로그인 응답결과처리용 php파일

	
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			<?
header("Content-Type:application/json");
include "../inc/config_noHeader.php";
 
$arr = array();
if ($_SERVER["REQUEST_METHOD"]=="POST") {
    
    $user_id    = trim($_POST[user_id]);
    $user_pw    = trim($_POST[user_pw]);
 
    $user_id    = addslashes($user_id);
    $user_pw    = addslashes($user_pw);
 
    $query = "select user_id from test_member where user_id='$user_id' and user_pw='$user_pw'";
    $res   = mysql_query($query);
    $row   = mysql_fetch_array($res);
    if ($row[user_id]) {
        $arr["success"] = "1";        // 로그인 성공
    } else {
        $arr["success"] = "-1";        // 로그인 실패
    }
 
} else {
    $arr["success"] = "error";
}
echo json_encode($arr,JSON_PRETTY_PRINT+JSON_UNESCAPED_UNICODE);
?>
Colored by Color Scripter

			cs
		

[ LoginRequest.java ] - POST 방식으로 웹요청할 로그인 클래스

	
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			import com.android.volley.AuthFailureError;
import com.android.volley.Response;
import com.android.volley.toolbox.StringRequest;
 
import java.util.HashMap;
import java.util.Map;
 
public class LoginRequest extends StringRequest {
    private final static String URL = "http://도메인주소/json/json_login_test_member.php";
    private Map<String,String> map;
 
    public LoginRequest(String user_id, String user_pw, Response.Listener<String> listener, Response.ErrorListener errorListener) {
        super(Method.POST, URL, listener, errorListener);
 
        map = new HashMap<>();
        map.put("user_id",user_id);
        map.put("user_pw",user_pw);
 
    }
 
    @Override
    protected Map<String, String> getParams() throws AuthFailureError {
        return map;
    }
}
Colored by Color Scripter

			cs
		

[ LoginActivity.java ]

	
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			import androidx.appcompat.app.AppCompatActivity;
 
import android.content.Intent;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.Toast;
 
import com.android.volley.RequestQueue;
import com.android.volley.Response;
import com.android.volley.VolleyError;
import com.android.volley.toolbox.Volley;
 
import org.json.JSONException;
import org.json.JSONObject;
 
public class LoginActivity extends AppCompatActivity {
    private EditText login_et_id,login_et_pw;
    private Button login_btn1;
 
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_login);
        setTitle("로그인");
 
        login_et_id = findViewById(R.id.login_et_id);
        login_et_pw = findViewById(R.id.login_et_pw);
        login_btn1 = findViewById(R.id.login_btn1);
 
        login_btn1.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                login();
            }
        });
    }
 
    private void login() {
        final String user_id = login_et_id.getText().toString();
        String user_pw = login_et_pw.getText().toString();
 
        Response.Listener<String> responseListener = new Response.Listener<String>() {
            @Override
            public void onResponse(String response) {
 
                try {
                    JSONObject jsonObject = new JSONObject(response);
                    String success = jsonObject.getString("success");
                    if (success != null && success.equals("1")) {
                        Toast.makeText(getApplicationContext(),"로그인 성공!",Toast.LENGTH_SHORT).show();
                        Intent intent = new Intent(LoginActivity.this,MainActivity.class);
                        intent.putExtra("user_id",user_id);
                        startActivity(intent);
                        finish();
 
                    } else {
                        Toast.makeText(getApplicationContext(),"로그인 실패!",Toast.LENGTH_SHORT).show();
                        return;
                    }
                } catch (JSONException e) {
                    e.printStackTrace();
                }
            }
        };
 
        Response.ErrorListener errorListener = new Response.ErrorListener() {
            @Override
            public void onErrorResponse(VolleyError error) {
                Toast.makeText(getApplicationContext(),"로그인 처리시 에러발생!",Toast.LENGTH_SHORT).show();
                return;
            }
        };
 
        // Volley 로 로그인 양식 웹전송
        LoginRequest loginRequest = new LoginRequest(user_id,user_pw,responseListener,errorListener);
        loginRequest.setShouldCache(false);
 
        RequestQueue queue = Volley.newRequestQueue(getApplicationContext());
        queue.add(loginRequest);
 
    }
}
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			cs
		

[ MainActivity.java ]

	
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			import androidx.appcompat.app.AlertDialog;
import androidx.appcompat.app.AppCompatActivity;
 
import android.content.DialogInterface;
import android.content.Intent;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.LinearLayout;
import android.widget.TextView;
 
public class MainActivity extends AppCompatActivity {
    LinearLayout logoff_layout, logon_layout;
    Button btn_login, btn_register, btn_logout;
    TextView txt_login;
 
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        setTitle("로그인,회원가입 테스트");
 
        logoff_layout = findViewById(R.id.logoff_layout);
        logon_layout = findViewById(R.id.logon_layout);
 
        btn_login = findViewById(R.id.btn_login);
        btn_logout = findViewById(R.id.btn_logout);
        btn_register = findViewById(R.id.btn_register);
        txt_login = findViewById(R.id.txt_login);
 
        Intent intent = getIntent();
        String user_id = intent.getStringExtra("user_id");
        if (user_id==null) {    // 로그아웃 상태
            logon_layout.setVisibility(View.INVISIBLE);
            logoff_layout.setVisibility(View.VISIBLE);
 
        } else {                // 로그인 상태
            logon_layout.setVisibility(View.VISIBLE);
            logoff_layout.setVisibility(View.INVISIBLE);
 
            txt_login.setText(user_id + " 회원님");
        }
 
 
        btn_login.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                login();
            }
        });
 
        btn_logout.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                logout();
            }
        });
 
        btn_register.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                register();
            }
        });
    }
 
    private void login() {
        Intent intent = new Intent(MainActivity.this,LoginActivity.class);
        startActivity(intent);
    }
 
    private void logout() {
        new AlertDialog.Builder(this)
                .setTitle("로그아웃").setMessage("로그아웃 하시겠습니까?")
                .setPositiveButton("로그아웃", new DialogInterface.OnClickListener() {
                    @Override
                    public void onClick(DialogInterface dialog, int which) {
                        // 로그아웃 처리
                        txt_login.setText("");
                        logon_layout.setVisibility(View.INVISIBLE);
                        logoff_layout.setVisibility(View.VISIBLE);
 
                        Intent intent = new Intent(MainActivity.this,LoginActivity.class);
                        intent.setFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP|Intent.FLAG_ACTIVITY_SINGLE_TOP);
                        startActivity(intent);
                    }
                })
                .setNegativeButton("취소", null)
                .show();
    }
 
    private void register() {
        Intent intent = new Intent(MainActivity.this,RegisterActivity.class);
        startActivity(intent);
    }
 
}
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			cs
		

Volley 로 웹요청하고 응답받기2 - Post방식 , 로그인-회원가입 (php,mysql 연동)

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