[안드로이드][코틀린] 하단 네비게이션바(bottom navigation)-프래그먼트(fragment) 연결

참고 강의

 

 

 

구현 계획

하단 네비게이션바 탭에 맞춰 프래그먼트 전환하기

 

 

gradle(Module) 파일에 라이브러리 싱크

dependencies {

    implementation 'com.fxn769:ariana:1.0'
    
}

 

 

 

각 fragment의 xml 파일 작성

TextView 추가

<TextView
        android:id="@+id/text_add"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="ADD"
        android:textSize="50dp"
        android:textColor="#fff"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintTop_toTopOf="parent"
        app:layout_constraintLeft_toLeftOf="parent"
        app:layout_constraintRight_toRightOf="parent"/>

 

 

 

activity_main.xml

ImageView, ViewPager 추가

<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.ConstraintLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical">

    <ImageView
        android:id="@+id/img_view"
        android:layout_width="match_parent"
        android:layout_height="0dp"
        app:layout_constraintTop_toBottomOf="parent"
        app:layout_constraintBottom_toTopOf="@+id/chip_navigation"
        app:layout_constraintLeft_toLeftOf="parent"
        app:layout_constraintRight_toRightOf="parent"/>

    <androidx.viewpager.widget.ViewPager
        android:id="@+id/view_pg"
        android:layout_width="0dp"
        android:layout_height="0dp"
        app:layout_constraintTop_toBottomOf="parent"
        app:layout_constraintBottom_toTopOf="@+id/chip_navigation"
        app:layout_constraintLeft_toLeftOf="parent"
        app:layout_constraintRight_toRightOf="parent"
        />


    <com.ismaeldivita.chipnavigation.ChipNavigationBar
        android:id="@+id/chip_navigation"
        android:layout_width="match_parent"
        android:layout_height="70dp"
        android:background="#fff"
        android:gravity="center"
        android:elevation="16dp"
        app:cnb_menuResource="@menu/bottom_navigation"
        app:layout_constraintBottom_toBottomOf="parent"
        />


</androidx.constraintlayout.widget.ConstraintLayout>

 

 

 

뷰페이저 어댑터 만들기

package com.myapplication2.Adapter

import android.os.Bundle
import android.view.LayoutInflater
import android.view.View
import android.view.ViewGroup
import androidx.fragment.app.Fragment
import androidx.fragment.app.FragmentManager
import androidx.fragment.app.FragmentPagerAdapter
import com.myapplication2.R
import kotlinx.android.synthetic.main.fragment_mood.view.*


private  const val ARG_PARAM1 = "param1"
class NavigationViewPagerAdapter (supportFragmentManager: FragmentManager): FragmentPagerAdapter(supportFragmentManager) {

    var list = ArrayList<String>()
    override fun getItem(position: Int): Fragment {
    	
        //첫 페이지가 될 fragment
        return Mood.newInstance(list[position])
    }

    override fun getCount(): Int {
        return list.size
    }

    class Mood: Fragment() {
        private var param1: String? = ""
        override fun onCreate(savedInstanceState: Bundle?) {
            super.onCreate(savedInstanceState)
            arguments?.let {
                param1 = it.getString(ARG_PARAM1)
            }
        }

        companion object {
            @JvmStatic
            fun newInstance(
                param1: String
            )=Mood().apply {
                arguments = Bundle().apply {
                    putString(ARG_PARAM1, param1)
                }
            }
        }

        override fun onCreateView(
            inflater: LayoutInflater,
            container: ViewGroup?,
            savedInstanceState: Bundle?
        ): View? {
            var rootView = LayoutInflater.from(context).inflate(R.layout.fragment_mood, null, false)
            rootView.text_mood.text = param1
            return rootView
        }
    }

}

 

 

 

MainActivity.kt

class MainActivity : AppCompatActivity() {

    private val fragmentManager: FragmentManager = supportFragmentManager
    private var fragmentAdd: AddFragment = AddFragment()
    private var fragmentMood: MoodFragment = MoodFragment()
    private var fragmentHabit: HabitFragment = HabitFragment()
    private var fragmentChart: ChartFragment = ChartFragment()
    private var fragmentProfile: ProfileFragment = ProfileFragment()

    override fun onCreate(savedInstanceState: Bundle?) {

        super.onCreate(savedInstanceState)
        setContentView(R.layout.activity_loginresult)

		//chip_navigation: activity_main.xml에서 네비게이션바 id
        //id: menu디렉토리에서 정한 각 item의 id
        chip_navigation.setOnItemSelectedListener { id ->
            when (id) {
                R.id.mood -> view_pg.currentItem = 0
                R.id.habit_tracker -> view_pg.currentItem = 1
                R.id.add -> view_pg.currentItem = 2
                R.id.chart -> view_pg.currentItem = 3
                R.id.profile -> view_pg.currentItem = 4

            }
        }


		//view_pg: activity_main.xml에서 viewpager의 id
        view_pg.adapter = NavigationViewPagerAdapter(supportFragmentManager).apply {
            list = ArrayList<String>().apply {
                add("Mood")
                add("Habit")
                add("Add")
                add("Chart")
                add("Profile")
            }
        }
		
        //img_view: activity_main.xml의 이미지뷰 id
        view_pg.addOnPageChangeListener(
            ArianaBackgroundListener(
                getColors(),
                img_view,
                view_pg
            )
        )
    }

    private fun getColors():IntArray{
        return intArrayOf(
        	//R.color.색깔name(color.xml파일 확인)
            ContextCompat.getColor(this, R.color.navigation_color_moodtracker),
            ContextCompat.getColor(this, R.color.navigation_color_habittracker),
            ContextCompat.getColor(this, R.color.navigation_color_add),
            ContextCompat.getColor(this, R.color.navigation_color_chart),
            ContextCompat.getColor(this, R.color.navigation_color_profile)

        )
    }
}

 

 

 

수정해야 할 사항

로그인 후 보일 첫 프래그먼트의 네비게이션바 탭이 선택돼 있도록