[Kotlin] ViewPager2 + RecyclerView.Adapter

build.gradle (Module: app)

dependencies {
	implementation 'androidx.viewpager2:viewpager2:1.0.0'
}

 

 

 

 

 

 

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"
    tools:context=".MainActivity">

    <androidx.viewpager2.widget.ViewPager2
        android:id="@+id/viewPage2"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        app:layout_constraintTop_toTopOf="parent"
        app:layout_constraintLeft_toLeftOf="parent"
        app:layout_constraintRight_toRightOf="parent"
        app:layout_constraintBottom_toBottomOf="parent"/>

</androidx.constraintlayout.widget.ConstraintLayout>

activity_main.xml

 

 

 

 

 

 

 

viewpager_item.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:gravity="center"
    android:background="#FFBBAA"
    android:orientation="vertical">

    <TextView
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:text="혀가 길지 않은 개발자"
        android:textStyle="bold"
        android:textSize="30dp"
        android:gravity="center"/>

    <TextView
        android:id="@+id/txtCount"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:text="1 page"
        android:textSize="30dp"
        android:textStyle="bold"
        android:gravity="center" />

</LinearLayout>

viewpager_item.xml

 

 

 

 

 

 

ViewPagerAdapter.kt

package com.jwsoft.kotlinproject

import android.content.Context
import android.view.LayoutInflater
import android.view.View
import android.view.ViewGroup
import android.widget.TextView
import androidx.recyclerview.widget.RecyclerView

class ViewPagerAdapter(strData: ArrayList<String>)
    : RecyclerView.Adapter<ViewPagerAdapter.MyViewHolder>() {

    val arrData = strData

    inner class MyViewHolder(itemView: View) : RecyclerView.ViewHolder(itemView) {
        var txtCount: TextView = itemView.findViewById(R.id.txtCount)
    }

    override fun onCreateViewHolder(parent: ViewGroup, viewType: Int): MyViewHolder {
        val context = parent.context
        val inflater: LayoutInflater = context.getSystemService(Context.LAYOUT_INFLATER_SERVICE) as LayoutInflater
        val view: View = inflater.inflate(R.layout.viewpager_item, parent, false)
        val viewHolder = MyViewHolder(view)

        return viewHolder
    }

    override fun onBindViewHolder(holder: MyViewHolder, position: Int) {
        holder.txtCount.text = arrData[position]
    }

    override fun getItemCount(): Int {
        return arrData.size
    }

}

 

 

 

 

 

 

 

MainActivity.kt

package com.jwsoft.kotlinproject

import androidx.appcompat.app.AppCompatActivity
import android.os.Bundle
import androidx.viewpager2.widget.ViewPager2

class MainActivity : AppCompatActivity() {

    private lateinit var viewPager2: ViewPager2

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

        var arrStr: ArrayList<String> = ArrayList()
        for (i in 1..100) {
            arrStr.add(i.toString())
        }

        var adapter = ViewPagerAdapter(arrStr)

        viewPager2 = findViewById(R.id.viewPage2)
        viewPager2.orientation = ViewPager2.ORIENTATION_HORIZONTAL
        viewPager2.adapter = adapter

    }
}

실행 결과