BottomNavigationView, Fragment

 

 

 

 

 

 

 

• activity_main.xml

<FrameLayout
        android:id="@+id/frame_fragments"
        android:layout_width="match_parent"
        android:layout_height="0dp"
        app:layout_constraintBottom_toTopOf="@+id/bottom_navigation" />


<com.google.android.material.bottomnavigation.BottomNavigationView
        android:id="@+id/bottom_navigation"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:background="#ffffff"
        app:itemIconTint="@color/bottom_navigation_color"
        app:itemTextColor="@color/bottom_navigation_color"
        app:layout_constraintBottom_toBottomOf="parent"
        app:menu="@menu/item_navigation" />

 

 

• color/bottom_navigation_color.xml

<?xml version="1.0" encoding="utf-8"?>
<selector xmlns:android="http://schemas.android.com/apk/res/android">
    <item android:color="#7A59C5" android:state_checked="true" />
    <item android:color="#9F9F9F" />
</selector>

 

 

• menu/item_navigation.xml

<?xml version="1.0" encoding="utf-8"?>
<menu xmlns:android="http://schemas.android.com/apk/res/android">
    <item
        android:id="@+id/action_home"
        android:enabled="true"
        android:icon="@drawable/ic_home"
        android:title="Home" />
    <item
        android:id="@+id/action_search"
        android:enabled="true"
        android:icon="@drawable/ic_search"
        android:title="Search"/>
    <item
        android:id="@+id/action_wish"
        android:enabled="true"
        android:icon="@drawable/ic_heart"
        android:title="Wish"/>
    <item
        android:id="@+id/action_star"
        android:enabled="true"
        android:icon="@drawable/ic_star"
        android:title="Star"/>
    <item
        android:id="@+id/action_mypage"
        android:enabled="true"
        android:icon="@drawable/ic_user"
        android:title="MyPage"/>

</menu>

 

 

 

• HomeFragment

class HomeFragment : Fragment() {
    companion object {
        fun newInstance() : HomeFragment = HomeFragment()
    }

    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
    }

    override fun onAttach(context: Context) {
        super.onAttach(context)
    }

    override fun onCreateView(
        inflater: LayoutInflater,
        container: ViewGroup?,
        savedInstanceState: Bundle?
    ): View? {
        return inflater.inflate(R.layout.fragment_home, container, false)
        //반환형 : View
    }
}

 

 

• MainActivity

class MainActivity : AppCompatActivity(), BottomNavigationView.OnNavigationItemSelectedListener {

    //멤버변수
    private lateinit var homeFragment: HomeFragment
    private lateinit var searchFragment: SearchFragment
    private lateinit var wishFragment: WishFragment
    private lateinit var starFragment: StarFragment
    private lateinit var mypageFragment: MypageFragment


    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        setContentView(R.layout.activity_main)

        bottom_navigation.setOnNavigationItemSelectedListener(this)

        homeFragment = HomeFragment.newInstance()
        supportFragmentManager.beginTransaction().add(R.id.frame_fragments, homeFragment).commit()
    }

    override fun onNavigationItemSelected(item: MenuItem): Boolean {
        when(item.itemId){
            R.id.menu_home ->{
                homeFragment = HomeFragment.newInstance()
                supportFragmentManager.beginTransaction().replace(R.id.frame_fragments, homeFragment).commit()
            }
            R.id.menu_search -> {
                searchFragment = SearchFragment.newInstance()
                supportFragmentManager.beginTransaction().replace(R.id.frame_fragments, searchFragment).commit()
            }
            R.id.menu_wish -> {
                wishFragment = WishFragment.newInstance()
                supportFragmentManager.beginTransaction().replace(R.id.frame_fragments, wishFragment).commit()
            }
            R.id.menu_star -> {
                starFragment = StarFragment.newInstance()
                supportFragmentManager.beginTransaction().replace(R.id.frame_fragments, starFragment).commit()
            }
            R.id.menu_mypage -> {
                mypageFragment = MypageFragment.newInstance()
                supportFragmentManager.beginTransaction().replace(R.id.frame_fragments, mypageFragment).commit()
            }
        }
        return true
    }
}