[Android] Do it! 안드로이드 도전08세 개 이상의 화면 만들어 전환하기

세 개 이상의 화면 만들어 전환하기

(Do it! 안드로이드앱 프로그래밍 도전과제 _08)

앱에서 사용될 수 있는 여러 화면을 구성하고
각 화면을 전환하면서 토스트로
메시지를 띄워주도록 만들어 보세요

① 로그인 화면과 메뉴 화면 그리고 세개의 서브 화면 (고객 관리 화면, 매출 관리 화면, 상품 관리 화면)을
     각각 액티비티로 만듭니다.
 
② 로그인 화면에는 두 개의 입력상자와 하나의 버튼이 들어가도록 합니다.
 
③ 메뉴 화면에는 세 개의 버튼이 들어가도록 하고 각각 '고객 관리', '매출 관리', '상품 관리'라는 이름으로
    표시합니다.
 
④ 로그인 화면의 [로그인] 버튼을 누르면 메뉴 화면으로 이동합니다.  만약 사용자 이름이나 비밀번호가
    입력되어 있지 않은 상태에서 [로그인] 버튼을 누르면 토스트로 입력하라는 메시지를 보여주고 대기합니다.
 
⑤ 메뉴 화면의 버튼 중에서 하나를 누르면 해당 서브 화면으로 이동합니다.  메뉴 화면에 있는 [로그인] 버튼을
    누르면 로그인 화면으로 이동하고 각 서브 화면에 있는 [메뉴] 버튼을 누르면 메뉴 화면으로 이동합니다.

 

※ 참고할 점
각 화면은 액티비티로 만들고 startActivityForResult 메서드로 새로 띄우건 finish 메서드를 사용해서
원래의 화면으로 돌아올 수 있게 합니다.
그리고 어떤 화면으로부터 보내온 응답인지 모두 확인하여 모두 확인하여 토스트 메시지로 보여줍니다.

 
 

---

[CODE]

<activity_main.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=".MainActivity">

    <TextView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="Hello World!"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="parent" />

</androidx.constraintlayout.widget.ConstraintLayout>

---

<activity_login.xml>

<?xml version="1.0"?>
<RelativeLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent">
    
    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:orientation="vertical">

        <TextView
            android:id="@+id/textView"
            android:layout_width="match_parent"
            android:layout_height="110dp"
            android:layout_gravity="center"
            android:layout_margin="10dp"
            android:paddingTop="50dp"
            android:text="로그인하기"
            android:textSize="20sp"
            android:textStyle="bold" />
    </LinearLayout>

    <RelativeLayout
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:background="#aaffffff"
        android:layout_centerInParent="true"
        android:layout_margin="10dp">

        <LinearLayout

            android:layout_toLeftOf="@+id/loginButton"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_margin="4dp"
            android:layout_alignParentLeft="true"
            android:orientation="vertical">

            <LinearLayout
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:layout_margin="4dp"
                android:orientation="horizontal">

                <TextView
                    android:id="@+id/usernameLabel"
                    android:layout_width="wrap_content"
                    android:layout_height="wrap_content"
                    android:textSize="16dp"
                    android:textColor="#ff222222"
                    android:text="사용자명 : " />

                <EditText
                    android:id="@+id/usernameInput"
                    android:layout_width="170dp"
                    android:layout_height="wrap_content"
                    android:layout_alignBaseline="@id/usernameLabel"/>

        </LinearLayout>

        <LinearLayout
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_margin="4dp"
            android:orientation="horizontal">

            <TextView
                android:id="@+id/passwordLabel"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:textSize="16dp"
                android:textColor="#ff222222"
                android:text="비밀번호 : "/>

            <EditText
                android:id="@+id/passwordInput"
                android:layout_width="170dp"
                android:layout_height="wrap_content"
                android:layout_alignBaseline="@id/passwordLabel"
                android:inputType="textPassword"
                android:layout_below="@+id/usernameInput"/>

         </LinearLayout>
        </LinearLayout>

    <Button
        android:id="@+id/loginButton"
        android:layout_width="100dp"
        android:layout_height="100dp"
        android:text="로그인"
        android:layout_marginRight="4dp"
        android:layout_centerVertical="true"
        android:layout_alignParentRight="true"/>

    </RelativeLayout>

</RelativeLayout>

---

<activity_menu.xml>

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:layout_margin="20dp">
    
    <TextView
        android:id="@+id/textView"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="메인메뉴"
        android:textSize="25sp"
        android:textStyle="bold" />

    <LinearLayout
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_centerInParent="true"
        android:background="#aaffffff"
        android:orientation="vertical"
        android:padding="20dp">

        <Button
            android:id="@+id/menu01Button"
            android:layout_width="180dp"
            android:layout_height="wrap_content"
            android:text="고객관리"
            android:textSize="18sp"
            android:textStyle="bold" />

        <Button
            android:id="@+id/menu02Button"
            android:layout_width="180dp"
            android:layout_height="wrap_content"
            android:layout_marginTop="30dp"
            android:text="매츌관리"
            android:textSize="18sp"
            android:textStyle="bold" />

        <Button
            android:id="@+id/menu03Button"
            android:layout_width="180dp"
            android:layout_height="wrap_content"
            android:text="상품관리"
            android:layout_marginTop="30dp"
            android:textSize="18sp"
            android:textStyle="bold" />

        <Button
            android:id="@+id/backButton"
            android:layout_height="wrap_content"
            android:layout_width="180dp"
            android:textStyle="bold"
            android:textSize="18dp"
            android:text="로그인 화면"
            android:layout_marginTop="30dp"/>
    </LinearLayout>
</RelativeLayout>

---

<activity_customer.xml>

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent" >


    <LinearLayout
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:background="#aaffffff"
        android:layout_centerInParent="true"
        android:padding="20dp"
        android:layout_margin="20dp"
        android:orientation="vertical">

        <TextView
            android:id="@+id/titleText"
            android:layout_width="180dp"
            android:layout_height="wrap_content"
            android:textColor="#ff333333"
            android:textStyle="bold"
            android:textSize="18dp"
            android:text="고객 관리"
            android:gravity="center_horizontal" />

        <Button
            android:id="@+id/backButton"
            android:layout_width="180dp"
            android:layout_height="wrap_content"
            android:textStyle="bold"
            android:textSize="18dp"
            android:text="메뉴 화면"
            android:layout_marginTop="30dp"/>

    </LinearLayout>

</RelativeLayout>

---

<activity_product.xml>

<?xml version="1.0" encoding="utf-8"?>
    <RelativeLayout
        xmlns:android="http://schemas.android.com/apk/res/android"
        android:layout_width="match_parent"
        android:layout_height="match_parent">

       <LinearLayout
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:background="#aaffffff"
            android:layout_centerInParent="true"
            android:padding="20dp"
            android:layout_margin="20dp"
            android:orientation="vertical">

            <TextView
                android:id="@+id/titleText"
                android:layout_width="180dp"
                android:layout_height="wrap_content"
                android:textColor="#ff333333"
                android:textStyle="bold"
                android:textSize="18dp"
                android:text="상품 관리"
                android:gravity="center_horizontal" />

            <Button
                android:id="@+id/backButton"
                android:layout_width="180dp"
                android:layout_height="wrap_content"
                android:textStyle="bold"
                android:textSize="18dp"
                android:text="메뉴 화면"
                 android:layout_marginTop="30dp"/>

        </LinearLayout>

</RelativeLayout>

---

<activity_revenue.xml>

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent">


    <LinearLayout
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:background="#aaffffff"
        android:layout_centerInParent="true"
        android:padding="20dp"
        android:layout_margin="20dp"
        android:orientation="vertical">

        <TextView
            android:id="@+id/titleText"
            android:layout_width="180dp"
            android:layout_height="wrap_content"
            android:textColor="#ff333333"
            android:textStyle="bold"
            android:textSize="18dp"
            android:text="매출 관리"
            android:gravity="center_horizontal" />

        <Button
            android:id="@+id/backButton"
            android:layout_width="180dp"
            android:layout_height="wrap_content"
            android:textStyle="bold"
            android:textSize="18dp"
            android:text="메뉴 화면"
            android:layout_marginTop="30dp"/>

    </LinearLayout>

</RelativeLayout>

---

<MainActivity.java>

package com.example.mission_08;

import androidx.appcompat.app.AppCompatActivity;

import android.os.Bundle;

public class MainActivity extends AppCompatActivity {

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

---

<LoginActivity.java>

package com.example.mission_08;

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 androidx.appcompat.app.AppCompatActivity;

public class LoginActivity extends AppCompatActivity {
    public static final int REQUEST_CODE_MENU = 101;

    EditText usernameInput;
    EditText passwordInput;

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

        Button loginButton = findViewById(R.id.loginButton);
        loginButton.setOnClickListener(new View.OnClickListener() {
            public void onClick(View v) {
                String username = usernameInput.getText().toString();
                String password = passwordInput.getText().toString();

                Intent intent = new Intent(getApplicationContext(), MenuActivity.class);
                intent.putExtra("username", username);
                intent.putExtra("password", password);

                startActivityForResult(intent, REQUEST_CODE_MENU);
            }
        });
        usernameInput = findViewById(R.id.usernameInput);
        passwordInput = findViewById(R.id.passwordInput);

    }

    protected void onActivityResult(int requestCode, int resultCode, Intent intent) {
        super.onActivityResult(requestCode, resultCode, intent);

        if (requestCode == REQUEST_CODE_MENU) {
            if (intent != null) {
                String menu = intent.getStringExtra("menu");
                String message = intent.getStringExtra("message");

                Toast toast = Toast.makeText(getBaseContext(), "result code : " + resultCode + ", " +
                        "menu : " + menu + ", message : " + message, Toast.LENGTH_LONG);
                toast.show();
            }
        }

    }

}

---

<MenuActivity.java>

package com.example.mission_08;

import static com.example.mission_08.R.id.menu01Button;

import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.Toast;

import androidx.appcompat.app.AppCompatActivity;

public class MenuActivity extends AppCompatActivity {
    public static final int REQUEST_CODE_CUSTOMER = 201;
    public static final int REQUEST_CODE_REVENUE =202 ;
    public static final int REQUEST_CODE_PRODUCT = 203;


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

        // process received intent
        Intent receivedIntent = getIntent();
        String username = receivedIntent.getStringExtra("username");
        String password = receivedIntent.getStringExtra("password");

        Toast.makeText(this, "username : " + username + ", password : " + password, Toast.LENGTH_LONG).show();

        Button backButton = findViewById(R.id.backButton);
        backButton.setOnClickListener(new View.OnClickListener() {
            public void onClick(View v) {
                Intent resultIntent = new Intent();
                resultIntent.putExtra("message", "result message is OK!");

                setResult(Activity.RESULT_OK, resultIntent);
                finish();
            }
        });

        Button menu01Button = findViewById(R.id.menu01Button);
        menu01Button.setOnClickListener(new View.OnClickListener() {
            public void onClick(View v) {
                Intent intent = new Intent(getApplicationContext(), CustomerActivity.class);
                intent.putExtra("titleMsg", "고객관리 화면");

               
                startActivityForResult(intent, REQUEST_CODE_CUSTOMER);
            }
        });

        Button menu02Button = findViewById(R.id.menu02Button);
        menu02Button.setOnClickListener(new View.OnClickListener() {


            public void onClick(View v) {
                Intent intent = new Intent(getApplicationContext(), RevenueActivity.class);
                intent.putExtra("titleMsg", "매출관리 화면");


                startActivityForResult(intent, REQUEST_CODE_REVENUE);
            }
        });

        Button menu03Button = findViewById(R.id.menu03Button);
        menu03Button.setOnClickListener(new View.OnClickListener() {


            public void onClick(View v) {
                Intent intent = new Intent(getApplicationContext(), ProductActivity.class);
                intent.putExtra("titleMsg", "상품관리 화면");

                startActivityForResult(intent, REQUEST_CODE_PRODUCT);
            }
        });
        
    }

    protected void onActivityResult(int requestCode, int resultCode, Intent intent) {
        super.onActivityResult(requestCode, resultCode, intent);

        if (intent != null) {
            if (requestCode == REQUEST_CODE_CUSTOMER) {
                String message = intent.getStringExtra("message");

                if (message != null) {
                    showToast("고객관리 응답, result code : " + resultCode + ", message : " + message);
                }
            } else if (requestCode == REQUEST_CODE_REVENUE) {
                String message = intent.getStringExtra("message");

                if (message != null) {
                    showToast("매출관리 응답, result code : " + resultCode + ", message : " + message);
                }
            } else if (requestCode == REQUEST_CODE_PRODUCT) {
                String message = intent.getStringExtra("message");

                if (message != null) {
                    showToast("상품관리 응답, result code : " + resultCode + ", message : " + message);
                }
            }
        }

    }

    private void showToast(String s) {
        Toast.makeText(getApplicationContext(), "message", Toast.LENGTH_SHORT).show();
    }
}

---

<CustometActivity.java>

package com.example.mission_08;

import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.TextView;
import android.widget.Toast;

import androidx.appcompat.app.AppCompatActivity;

public class CustomerActivity extends AppCompatActivity {
    TextView titleText;

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

        titleText = findViewById(R.id.titleText);

        // process received intent
        Intent receivedIntent = getIntent();
        String titleMsg = receivedIntent.getStringExtra("titleMsg");

        Toast.makeText(this, "titleMsg : " + titleMsg, Toast.LENGTH_LONG).show();

        if (titleText != null) {
            titleText.setText(titleMsg);
        }


        Button backButton = findViewById(R.id.backButton);
        backButton.setOnClickListener(new View.OnClickListener() {
            public void onClick(View v) {
                Intent resultIntent = new Intent();
                resultIntent.putExtra("message", "result message is OK!");

                setResult(Activity.RESULT_OK, resultIntent);
                finish();
            }
        });

    }

}

---

<ProductActivity.java>

import android.annotation.SuppressLint;
import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.TextView;
import android.widget.Toast;

import androidx.appcompat.app.AppCompatActivity;

public class ProductActivity extends AppCompatActivity {
    TextView titleText;

    @SuppressLint("MissingInflatedId")
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_product);

        titleText = findViewById(R.id.titleText);

        // process received intent
        Intent receivedIntent = getIntent();
        String titleMsg = receivedIntent.getStringExtra("titleMsg");

        Toast.makeText(this, "titleMsg : " + titleMsg, Toast.LENGTH_LONG).show();

        if (titleText != null) {
            titleText.setText(titleMsg);
        }


        Button backButton = findViewById(R.id.backButton);
        backButton.setOnClickListener(new View.OnClickListener() {
            public void onClick(View v) {
                Intent resultIntent = new Intent();
                resultIntent.putExtra("message", "result message is OK!");

                setResult(Activity.RESULT_OK, resultIntent);
                finish();
            }
        });

    }

}

---

<RevenueActivity.java>

public class RevenueActivity extends AppCompatActivity {

    TextView titleText;

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

        titleText = (TextView) findViewById(R.id.titleText);

        // process received intent
        Intent receivedIntent = getIntent();
        String titleMsg = receivedIntent.getStringExtra("titleMsg");

        Toast.makeText(this, "titleMsg : " + titleMsg, Toast.LENGTH_LONG).show();

        if (titleText != null) {
            titleText.setText(titleMsg);
        }


        Button backButton = (Button) findViewById(R.id.backButton);
        backButton.setOnClickListener(new View.OnClickListener() {
            public void onClick(View v) {
                Intent resultIntent = new Intent();
                resultIntent.putExtra("message", "result message is OK!");

                setResult(Activity.RESULT_OK, resultIntent);
                finish();
            }
        });

    }

}

---

<Manifest.xml>

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools">

    <application
        android:allowBackup="true"
        android:dataExtractionRules="@xml/data_extraction_rules"
        android:fullBackupContent="@xml/backup_rules"
        android:icon="@mipmap/ic_launcher"
        android:label="@string/app_name"
        android:roundIcon="@mipmap/ic_launcher_round"
        android:supportsRtl="true"
        android:theme="@style/Theme.MyMission_08"
        tools:targetApi="31">

        <activity android:label="@string/app_name"
            android:name=".LoginActivity"
            android:exported="true">

            <intent-filter>
                <action android:name="android.intent.action.MAIN"/>
                <category android:name="android.intent.category.LAUNCHER"/>
            </intent-filter>
        </activity>

        <activity android:name=".MenuActivity"/>
        <activity android:name=".CustomerActivity"/>
        <activity android:name=".ProductActivity"/>
        <activity android:name=".RevenueActivity"/>

    </application>

</manifest>

---

<실행결과 화면>
 

---

2023.09.13 - [STUDY/안드로이드] - [안드로이드앱] 로그인 화면과 메뉴 화면 전환하기

[안드로이드앱] 로그인 화면과 메뉴 화면 전환하기