[Do it! 안드로이드 앱] 자바) 세 개 이상의 화면 만들어 전환하기

도전과제 08

 

실행화면

 

디자인

 

프로젝트 설명

앱에서 사용될 수 있는 여러 화면을 구성하고 각 화면을 전환하면서 토스트로 메세지를 띄워주도록 한다

 

1. 로그인 화면과 메뉴 화면 그리고 세 개의 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

activity_mainxml

<?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"
    xmlns:tools="http://schemas.android.com/tools"
    android:padding="50dp"
    android:orientation="vertical"
    tools:context=".MainActivity">

    <TextView
        android:text="로그인하기"
        android:layout_height="wrap_content"
        android:layout_width="wrap_content"
        android:textSize="30dp"
        android:gravity="center_horizontal"/>

    <EditText
        android:id="@+id/EdtLogin"
        android:layout_width="200dp"
        android:layout_height="wrap_content"
        android:hint="아이디"
        android:layout_marginTop="50dp"
        />

    <EditText
        android:id="@+id/EdtPass"
        android:layout_width="200dp"
        android:layout_height="wrap_content"
        android:hint="비밀번호"
        android:inputType="textPassword"
        android:layout_marginTop="10dp"
        android:layout_below="@id/EdtLogin"/>

    <Button
        android:id="@+id/BtnLogin"
        android:layout_width="200dp"
        android:layout_height="100dp"
        android:layout_below="@id/EdtPass"
        android:layout_marginLeft="210dp"
        android:layout_marginTop="-98dp"
        android:text="로그인" />
</RelativeLayout>

MainActivity.java

package com.sample.doitmission_08;

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;

public class MainActivity extends AppCompatActivity {
    EditText edtLogin, edtPass;
    Button btnLogin;
    String id, pass;

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

        btnLogin = findViewById(R.id.BtnLogin);
        edtLogin = findViewById(R.id.EdtLogin);
        edtPass = findViewById(R.id.EdtPass);

        btnLogin.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                id = String.valueOf(edtLogin.getText());
                pass = String.valueOf(edtPass.getText());

                if (id == null && pass == null) {
                    Toast.makeText(getApplicationContext(), "아이디와 패스워드를 입력해주세요", Toast.LENGTH_SHORT).show();
                }
                else {
                    Intent intent = new Intent(MainActivity.this, MenuActivity.class);
                    startActivity(intent);
                }
            }
        });


    }
}

activity_menu.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    xmlns:tools="http://schemas.android.com/tools"
    tools:context=".MenuActivity"
    android:orientation="vertical">

    <TextView
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:textSize="60dp"
        android:text="메인메뉴" />

    <Button
        android:id="@+id/Btn1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_gravity="center"
        android:layout_marginTop="100dp"
        android:textSize="30dp"
        android:text="고객 관리"/>
    <Button
        android:id="@+id/Btn2"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_gravity="center"
        android:layout_marginTop="15dp"
        android:layout_marginBottom="15dp"
        android:textSize="30dp"
        android:text="매출 관리"/>
    <Button
        android:id="@+id/Btn3"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_gravity="center"
        android:textSize="30dp"
        android:text="상품 관리"/>

</LinearLayout>

MenuActivity.java

package com.sample.doitmission_08;

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

import androidx.appcompat.app.AppCompatActivity;

public class MenuActivity extends AppCompatActivity {
    Button btn1, btn2, btn3;

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

        btn1 = findViewById(R.id.Btn1);
        btn2 = findViewById(R.id.Btn2);
        btn3 = findViewById(R.id.Btn3);

        btn1.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                Intent intent = new Intent(MenuActivity.this, CustomerActivity.class);
                startActivity(intent);
            }
        });

        btn2.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                Intent intent = new Intent(MenuActivity.this, SaleActivity.class);
                startActivity(intent);
            }
        });

        btn3.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                Intent intent = new Intent(MenuActivity.this, ProductActivity.class);
                startActivity(intent);
            }
        });

    }
}

activity_customerxml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    xmlns:tools="http://schemas.android.com/tools"
    tools:context=".CustomerActivity"
    android:orientation="vertical">

    <TextView
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:textSize="60dp"
        android:text="고객 관리" />

    <Button
        android:id="@+id/Btn1_1"
        android:layout_width="200dp"
        android:layout_height="wrap_content"
        android:layout_gravity="center"
        android:layout_marginTop="100dp"
        android:textSize="30dp"
        android:text="메뉴로"/>
    <Button
        android:id="@+id/Btn1_2"
        android:layout_width="200dp"
        android:layout_height="wrap_content"
        android:layout_gravity="center"
        android:layout_marginTop="15dp"
        android:layout_marginBottom="15dp"
        android:textSize="30dp"
        android:text="로그인으로"/>
</LinearLayout>

CustomerActivity.java

package com.sample.doitmission_08;

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 CustomerActivity extends AppCompatActivity {
        Button btn1_1, btn1_2;

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

            btn1_1 = findViewById(R.id.Btn1_1);
            btn1_2 = findViewById(R.id.Btn1_2);

            btn1_1.setOnClickListener(new View.OnClickListener() {
                @Override
                public void onClick(View view) {
                    Intent intent = new Intent(CustomerActivity.this, MenuActivity.class);
                    startActivity(intent);
                }
            });

            btn1_2.setOnClickListener(new View.OnClickListener() {
                @Override
                public void onClick(View view) {
                    Intent intent = new Intent(CustomerActivity.this, MainActivity.class);
                    startActivity(intent);
                }
            });
    }
}

activity_salexml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    xmlns:tools="http://schemas.android.com/tools"
    tools:context=".SaleActivity"
    android:orientation="vertical">

    <TextView
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:textSize="60dp"
        android:text="매출 관리" />

    <Button
        android:id="@+id/Btn2_1"
        android:layout_width="200dp"
        android:layout_height="wrap_content"
        android:layout_gravity="center"
        android:layout_marginTop="100dp"
        android:textSize="30dp"
        android:text="메뉴로"/>
    <Button
        android:id="@+id/Btn2_2"
        android:layout_width="200dp"
        android:layout_height="wrap_content"
        android:layout_gravity="center"
        android:layout_marginTop="15dp"
        android:layout_marginBottom="15dp"
        android:textSize="30dp"
        android:text="로그인으로"/>
</LinearLayout>

SaleActivity.java

package com.sample.doitmission_08;

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

import androidx.appcompat.app.AppCompatActivity;

public class SaleActivity extends AppCompatActivity {
    Button btn2_1, btn2_2;

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

        btn2_1 = findViewById(R.id.Btn2_1);
        btn2_2 = findViewById(R.id.Btn2_2);

        btn2_1.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                Intent intent = new Intent(SaleActivity.this, MenuActivity.class);
                startActivity(intent);
            }
        });

        btn2_2.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                Intent intent = new Intent(SaleActivity.this, MainActivity.class);
                startActivity(intent);
            }
        });
    }
}

activity_productxml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    xmlns:tools="http://schemas.android.com/tools"
    tools:context=".ProductActivity"
    android:orientation="vertical">

    <TextView
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:textSize="60dp"
        android:text="상품 관리" />

    <Button
        android:id="@+id/Btn3_1"
        android:layout_width="200dp"
        android:layout_height="wrap_content"
        android:layout_gravity="center"
        android:layout_marginTop="100dp"
        android:textSize="30dp"
        android:text="메뉴로"/>
    <Button
        android:id="@+id/Btn3_2"
        android:layout_width="200dp"
        android:layout_height="wrap_content"
        android:layout_gravity="center"
        android:layout_marginTop="15dp"
        android:layout_marginBottom="15dp"
        android:textSize="30dp"
        android:text="로그인으로"/>
</LinearLayout>

ProductActivity.java

package com.sample.doitmission_08;

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

import androidx.appcompat.app.AppCompatActivity;

public class ProductActivity extends AppCompatActivity {
    Button btn3_1, btn3_2;

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

        btn3_1 = findViewById(R.id.Btn3_1);
        btn3_2 = findViewById(R.id.Btn3_2);

        btn3_1.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                Intent intent = new Intent(ProductActivity.this, MenuActivity.class);
                startActivity(intent);
            }
        });

        btn3_2.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                Intent intent = new Intent(ProductActivity.this, MainActivity.class);
                startActivity(intent);
            }
        });
    }
}

 

Manifest.xml

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