[Android Studio/Kotlin] Fragment, Include

[안드로이드 스튜디오/코틀린] 프래그먼트, 인클루드

Fragment

Layout에서 우클릭해 New, Layout Resource File 선택

File name에 frag1 입력 후 OK

frag1.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">

    <TextView
        android:id="@+id/textView"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="Fragment 1"
        android:textSize="30sp"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="parent" />
    
</androidx.constraintlayout.widget.ConstraintLayout>

frag2.xml

frag1.xml을 복붙해 frag2.xml도 만든다

<?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">

    <TextView
        android:id="@+id/textView"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="Fragment 2"
        android:textSize="30sp"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="parent" />

</androidx.constraintlayout.widget.ConstraintLayout>

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"
    android:orientation="vertical"
    tools:context=".MainActivity">

    <FrameLayout
        android:id="@+id/frameLayout"
        android:layout_width="match_parent"
        android:layout_height="0dp"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toBottomOf="@+id/btn2">

    </FrameLayout>

    <Button
        android:id="@+id/btn1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="BUTTON 1"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintHorizontal_bias="0.049"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="parent"
        app:layout_constraintVertical_bias="0.025" />

    <Button
        android:id="@+id/btn2"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="BUTTON 2"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintHorizontal_bias="0.95"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="parent"
        app:layout_constraintVertical_bias="0.025" />

</androidx.constraintlayout.widget.ConstraintLayout>

MainActivity.kt

package com.shinyelee.android_study2

import androidx.appcompat.app.AppCompatActivity
import android.os.Bundle
import android.view.LayoutInflater
import android.view.View
import android.view.ViewGroup
import androidx.fragment.app.Fragment
import com.shinyelee.android_study2.databinding.ActivityMainBinding

class MainActivity : AppCompatActivity() {

    private var vBinding : ActivityMainBinding? = null
    private val binding get() = vBinding!!

    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        vBinding = ActivityMainBinding.inflate(layoutInflater)
        setContentView(binding.root)

        binding.btn1.setOnClickListener {
            supportFragmentManager.beginTransaction().replace(R.id.frameLayout, OneFragment()).commit()
        }

        binding.btn2.setOnClickListener {
            supportFragmentManager.beginTransaction().replace(R.id.frameLayout, TwoFragment()).commit()
        }
    }

    override fun onDestroy() {
        vBinding = null
        super.onDestroy()
    }

}

class OneFragment: Fragment() {
    override fun onCreateView(
        inflater: LayoutInflater,
        container: ViewGroup?,
        savedInstanceState: Bundle?
    ) = inflater.inflate(R.layout.frag1, container, false)
}

class TwoFragment: Fragment() {
    override fun onCreateView(
        inflater: LayoutInflater,
        container: ViewGroup?,
        savedInstanceState: Bundle?
    ) = inflater.inflate(R.layout.frag2, container, false)
}

버튼1을 클릭하면

frag1,

버튼2를 클릭하면

frag2를 화면에 표시함

---

Include

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"
    android:orientation="vertical"
    tools:context=".MainActivity">

    <FrameLayout
        android:id="@+id/frameLayout"
        android:layout_width="match_parent"
        android:layout_height="0dp"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toBottomOf="@+id/btn2">

        <include
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            layout="@layout/frag1" />

    </FrameLayout>

    <!-- 생략 -->

</androidx.constraintlayout.widget.ConstraintLayout>

MainActivity.kt

package com.shinyelee.android_study2

import androidx.appcompat.app.AppCompatActivity
import android.os.Bundle
import com.shinyelee.android_study2.databinding.ActivityMainBinding

class MainActivity : AppCompatActivity() {

    private var vBinding : ActivityMainBinding? = null
    private val binding get() = vBinding!!

    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        vBinding = ActivityMainBinding.inflate(layoutInflater)
        setContentView(binding.root)
    }

    override fun onDestroy() {
        vBinding = null
        super.onDestroy()
    }

}

frag1이 삽입됨

---

참고