ViewPager2 with Fragment 프레그먼트 뷰페이저2

안드로이드 앱 프로그래밍 with 코틀린 11-5 뷰페이저2

 

<?xml version="1.0" encoding="utf-8"?>
<FrameLayout 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"
    tools:context=".OneFragment">
 
    <!-- TODO: Update blank fragment layout -->
    <TextView
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:background="#FF0000"
        android:gravity="center_horizontal|center_vertical"
        android:text="One Fragment" />
 
</FrameLayout>

 

fragment_one.xml

 

package com.example.myapplication
 
import android.os.Bundle
import androidx.fragment.app.Fragment
import android.view.LayoutInflater
import android.view.View
import android.view.ViewGroup
 
class OneFragment : Fragment() {
    override fun onCreateView(
        inflater: LayoutInflater, container: ViewGroup?,
        savedInstanceState: Bundle?
    ): View? {
        // Inflate the layout for this fragment
        return inflater.inflate(R.layout.fragment_one, container, false)
    }
}

 

OneFragment.kt

같은 형태로 TextView 배경색만 바꿔서 TwoFragment, ThreeFragment도 만들어 준다.

 

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout 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">
 
    <androidx.viewpager2.widget.ViewPager2
        android:id="@+id/viewpager"
        android:layout_width="match_parent"
        android:layout_height="match_parent" />
</LinearLayout>

 

activity_main.xml

 

package com.example.myapplication
 
import androidx.appcompat.app.AppCompatActivity
import android.os.Bundle
import android.util.Log
import androidx.fragment.app.Fragment
import androidx.fragment.app.FragmentActivity
import androidx.viewpager2.adapter.FragmentStateAdapter
import androidx.viewpager2.widget.ViewPager2
 
class MainActivity : AppCompatActivity() {
    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        setContentView(R.layout.activity_main)
 
        val viewPager2: ViewPager2 = findViewById(R.id.viewpager)
        viewPager2.adapter = MyFragmentPagerAdapter(this)
 
        //viewPager2.orientation = ViewPager2.ORIENTATION_VERTICAL
        // 이 설정을 적용하면 스와이프 방향이 세로로 바뀐다.
    }
}
 
class MyFragmentPagerAdapter(activity: FragmentActivity) : FragmentStateAdapter(activity) {
    val fragments: List<Fragment>
    init {
        fragments = listOf(OneFragment(), TwoFragment(), ThreeFragment())
        Log.d("Sean", "Fragments size: ${fragments.size}")
    }
 
    override fun getItemCount(): Int {
        return fragments.size
    }
 
    override fun createFragment(position: Int): Fragment {
        return fragments[position]
    }
}

 

MainActivity.kt

 

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