안드로이드 하단 메뉴바 활용하기

이전 포스팅 : 안드로이드 프래그먼트 활용하기

안드로이드 프래그먼트 활용하기

 

사전 작업
1. res 폴더 우클릭 -> New -> Android Resources Directory -> menu 폴더 생성
2. res/drawable -> New -> Vector Asset -> 사용할 Clipart 이미지 생성

MainActivity.java

public class MainActivity extends AppCompatActivity {
    private FragmentManager fragmentManager;
    private Fragment_Main fragment_main;
    private Fragment_MyPage fragment_my_page;
    private FragmentTransaction fragmentTransaction;

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

        fragmentManager = getSupportFragmentManager();

        fragment_main = new Fragment_Main();
        fragment_my_page = new Fragment_MyPage();

        fragmentTransaction = fragmentManager.beginTransaction();
        fragmentTransaction.replace(R.id.frameLayout, fragment_my_page).commitNowAllowingStateLoss();
 
 	// 이벤트 리스너 등록
        BottomNavigationView bottomNavigationView = findViewById(R.id.navBar);
        bottomNavigationView.setOnNavigationItemSelectedListener(new MenuClickEventListener()); 
    }
    class MenuClickEventListener implements BottomNavigationView.OnNavigationItemSelectedListener{
        @Override
        public boolean onNavigationItemSelected(@NonNull MenuItem item) {
            fragmentTransaction = fragmentManager.beginTransaction();

            switch(item.getItemId())
            {
                case R.id.btn_main:
                    fragmentTransaction.replace(R.id.frameLayout, fragment_main).commitNowAllowingStateLoss();
                    break;
                case R.id.btn_my_page:
                    fragmentTransaction.replace(R.id.frameLayout, fragment_my_page).commitNowAllowingStateLoss();
                    break;
            }
            return true;
        }
    }

    /* 
    // 이전 포스팅 코드
    public void MenuClickHandler(View v){
        fragmentManager = getSupportFragmentManager();
        fragmentTransaction = fragmentManager.beginTransaction();

        switch (v.getId()){
            case R.id.btn_main:
                fragmentTransaction.replace(R.id.frameLayout, fragment_main).commitNowAllowingStateLoss();
                break;
            case R.id.btn_my_page:
                fragmentTransaction.replace(R.id.frameLayout, fragment_my_page).commitNowAllowingStateLoss();
                break;
        }
    }*/
}

 

res/menu/nav.xml

<?xml version="1.0" encoding="utf-8"?>
<menu xmlns:android="http://schemas.android.com/apk/res/android">
    <item
        android:id="@+id/btn_main"
        android:icon="@drawable/ic_baseline_home_24"
        android:title="Main" />
    <item
        android:id="@+id/btn_my_page"
        android:icon="@android:drawable/ic_menu_manage"
        android:title="My Page" />
</menu>

 

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">

    <FrameLayout
        android:id="@+id/frameLayout"
        android:layout_width="match_parent"
        android:layout_height="0dp"
        app:layout_constraintBottom_toTopOf="@id/navBar"
        app:layout_constraintLeft_toLeftOf="parent"
        app:layout_constraintRight_toRightOf="parent"
        app:layout_constraintTop_toTopOf="parent">

    </FrameLayout>

    <com.google.android.material.bottomnavigation.BottomNavigationView
        android:id="@+id/navBar"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:background="?android:attr/windowBackground"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintLeft_toLeftOf="parent"
        app:layout_constraintRight_toLeftOf="parent"
        app:menu="@menu/nav" />

</androidx.constraintlayout.widget.ConstraintLayout>

최종 결과물

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