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크게 작게 위로 아래로 댓글로 가기 인쇄 첨부
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크게 작게 위로 아래로 댓글로 가기 인쇄 첨부

 

먼저 그래들 dependencies 안에 material  관련 라이브러리를 추가하자. 

이러한 하단탭은 이 material 에서 가져온다.

 

[ build.gradle (app) ]

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dependencies {
........
 
    implementation 'com.google.android.material:material:1.0.0'
}
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[ /res/values/colors.xml ]

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<?xml version="1.0" encoding="utf-8"?>
<resources>
    <color name="colorPrimary">#008577</color>
    <color name="colorPrimaryDark">#00574B</color>
    <color name="colorAccent">#D81B60</color>
</resources>
 
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[ /res/menu/menu_bottom.xml ]

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<?xml version="1.0" encoding="utf-8"?>
<menu xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto">
 
    <item android:id="@+id/tab1"
        android:enabled="true"
        app:showAsAction="ifRoom"
        android:title="이메일"
        android:icon="@android:drawable/ic_dialog_email"/>
 
    <item android:id="@+id/tab2"
        app:showAsAction="ifRoom"
        android:title="정보"
        android:icon="@android:drawable/ic_dialog_info"/>
 
    <item android:id="@+id/tab3"
        app:showAsAction="ifRoom"
        android:title="위치"
        android:icon="@android:drawable/ic_dialog_map"/>
</menu>
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하단탭이 메뉴 형태로 깔끔하게 xml 으로 만든다.

 

 

[ /res/layout/activity_main.xml ]

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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=".MainActivity">
 
    <FrameLayout
        android:id="@+id/container"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        app:layout_behavior="@string/appbar_scrolling_view_behavior"/>
 
    <com.google.android.material.bottomnavigation.BottomNavigationView
        android:id="@+id/bottom_navigation"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_marginEnd="0dp"
        android:layout_marginStart="0dp"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintLeft_toLeftOf="parent"
        app:layout_constraintRight_toRightOf="parent"
        app:itemBackground="@color/colorPrimary"
        app:itemIconTint="@drawable/item_color"
        app:itemTextColor="@drawable/item_color"
        app:menu="@menu/menu_bottom" />
 
</androidx.constraintlayout.widget.ConstraintLayout>
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위의 소스에서 BottomNavigationView 가 하단탭 부분이다.

 

[ fragment1.xml ]

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<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical"
    android:background="@android:color/holo_blue_bright"
    tools:context=".Fragment1">
 
    <Button
        android:id="@+id/button"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:text="첫 번째" />
    
</LinearLayout>
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[ fragment2.xml ]

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<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical"
    android:background="@android:color/holo_orange_light"
    tools:context=".Fragment2">
 
    <Button
        android:id="@+id/button"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:text="두 번째" />
 
</LinearLayout>
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[ fragment3.xml ]

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<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical"
    android:background="@android:color/holo_purple"
    tools:context=".Fragment3">
 
    <Button
        android:id="@+id/button"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:text="세 번째" />
 
</LinearLayout>
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[ Fragment1.java ]

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import android.os.Bundle;
import androidx.fragment.app.Fragment;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
 
 
public class Fragment1 extends Fragment {
 
    public Fragment1() {
        // Required empty public constructor
    }
 
 
    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container,
                             Bundle savedInstanceState) {
        // Inflate the layout for this fragment
        return inflater.inflate(R.layout.fragment1, container, false);
    }
 
}
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[ Fragment2.java ]

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import android.os.Bundle;
import androidx.fragment.app.Fragment;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
 
 
public class Fragment2 extends Fragment {
 
 
    public Fragment2() {
        // Required empty public constructor
    }
 
 
    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container,
                             Bundle savedInstanceState) {
        // Inflate the layout for this fragment
        return inflater.inflate(R.layout.fragment2, container, false);
    }
 
}
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[ Fragment3.java ]

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import android.os.Bundle;
import androidx.fragment.app.Fragment;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
 
 
public class Fragment3 extends Fragment {
 
 
    public Fragment3() {
        // Required empty public constructor
    }
 
 
    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container,
                             Bundle savedInstanceState) {
        // Inflate the layout for this fragment
        return inflater.inflate(R.layout.fragment3, container, false);
    }
 
}
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[ MainActivity.java ]

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import androidx.annotation.NonNull;
import androidx.appcompat.app.AppCompatActivity;
import android.os.Bundle;
import android.view.MenuItem;
import android.widget.Toast;
 
import com.google.android.material.bottomnavigation.BottomNavigationView;
 
public class MainActivity extends AppCompatActivity {
 
    Fragment1 fragment1;
    Fragment2 fragment2;
    Fragment3 fragment3;
 
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
 
        fragment1 = new Fragment1();
        fragment2 = new Fragment2();
        fragment3 = new Fragment3();
 
        getSupportFragmentManager().beginTransaction().replace(R.id.container,fragment1).commit();
 
        BottomNavigationView bottomNavigation = findViewById(R.id.bottom_navigation);
        bottomNavigation.setOnNavigationItemSelectedListener(new BottomNavigationView.OnNavigationItemSelectedListener() {
            @Override
            public boolean onNavigationItemSelected(@NonNull MenuItem item) {
                switch (item.getItemId()) {
                    case R.id.tab1:
                        Toast.makeText(getApplicationContext(),"첫번째",Toast.LENGTH_SHORT).show();
                        getSupportFragmentManager().beginTransaction().replace(R.id.container,fragment1).commit();
                        return true;
 
                    case R.id.tab2:
                        Toast.makeText(getApplicationContext(),"두번째",Toast.LENGTH_SHORT).show();
                        getSupportFragmentManager().beginTransaction().replace(R.id.container,fragment2).commit();
                        return true;
 
                    case R.id.tab3:
                        Toast.makeText(getApplicationContext(),"세번째",Toast.LENGTH_SHORT).show();
                        getSupportFragmentManager().beginTransaction().replace(R.id.container,fragment3).commit();
                        return true;
                }
                return false;
            }
        });
    }
}
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27라인이 핵심이다. 24라인처럼 화면 로딩시 최초화면은 fragment1.xml 화면을 시작화면으로 한다.


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