build.gragle
[code]
android {
buildFeatures {
viewBinding = true
}
}
[/code]
ActivityMain.kt
[code]
package kr.kbay.example1
import androidx.appcompat.app.AppCompatActivity
import android.os.Bundle
import kr.kbay.bogosa.databinding.ActivityMainBinding
class MainActivity : AppCompatActivity() {
val TAG: String = “로그”
lateinit var binding: ActivityMainBinding
lateinit var firstFragment: FirstFragment
lateinit var secondFragment: SecondFragment
lateinit var thirdFragment: ThirdFragment
override fun onCreate(savedInstanceState: Bundle?) {
super.onCreate(savedInstanceState)
binding = ActivityMainBinding.inflate(layoutInflater)
setContentView(binding.root)
setSupportActionBar(binding.toolbar.root)
binding.bottomNavigation.setOnNavigationItemSelectedListener {
when(it.itemId) {
R.id.firstFragment -> {
firstFragment = FirstFragment.newInstance()
supportFragmentManager.beginTransaction().replace(R.id.fragments_frame, firstFragment).commit()
}
R.id.secondFragment -> {
secondFragment = SecondFragment.newInstance()
supportFragmentManager.beginTransaction().replace(R.id.fragments_frame, secondFragment).commit()
}
R.id.thirdFragment -> {
thirdFragment = ThirdFragment.newInstance()
supportFragmentManager.beginTransaction().replace(R.id.fragments_frame, thirdFragment).commit()
}
}
true
}
}
}
[/code]
res.layout
activity_main.xml
[code]
<?xml version=”1.0″ encoding=”utf-8″?>
<RelativeLayout 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”>
<androidx.fragment.app.FragmentContainerView
android:id=”@+id/fragments_frame”
android:layout_width=”match_parent”
android:layout_height=”match_parent”
android:layout_below=”@id/toolbar”
android:layout_above=”@id/bottom_navigation”
/>
<com.google.android.material.bottomnavigation.BottomNavigationView
android:id=”@+id/bottom_navigation”
android:layout_width=”match_parent”
android:layout_height=”wrap_content”
app:itemBackground=”@color/cardview_dark_background”
app:itemTextColor=”@drawable/selector”
app:itemIconTint=”@drawable/selector”
app:menu=”@menu/menu_navigation”
android:layout_alignParentBottom=”true”
/>
</RelativeLayout>
[/code]
res.navigation
bot_navi.xml
[code]
<?xml version=”1.0″ encoding=”utf-8″?>
<navigation 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:id=”@+id/bot_navi”
app:startDestination=”@id/firstFragment”>
<fragment
android:id=”@+id/firstFragment”
android:name=”kr.kbay.bogosa.FirstFragment”
android:label=”fragment_first”
tools:layout=”@layout/fragment_first”
/>
<fragment
android:id=”@+id/secondFragment”
android:name=”kr.kbay.bogosa.SecondFragment”
android:label=”fragment_second”
tools:layout=”@layout/fragment_second” />
<fragment
android:id=”@+id/thirdFragment”
android:name=”kr.kbay.bogosa.ThirdFragment”
android:label=”fragment_third”
tools:layout=”@layout/fragment_third” />
</navigation>
[/code]
res.layout
fragment_first.xml
[code]
<?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”
xmlns:app=”http://schemas.android.com/apk/res-auto”
tools:context=”.FirstFragment”
android:orientation=”vertical”
android:gravity=”center”>
<TextView
android:layout_width=”wrap_content”
android:layout_height=”wrap_content”
android:text=”First”
android:textSize=”50dp”
/>
</LinearLayout>
[/code]
res.layout
fragment_second.xml
생략
res.layout
fragment_third.xml
생략
