[Android][Kotlin] View Pager 뷰페이저 기본 사용법

class Fruit(
    var name: String,
    var image: String,
    var content: String
) {
    fun getImageId(context: Context): Int {
        return context.resources.getIdentifier(image, "drawable", context.packageName)
    }
}

/* MainActivity.kt */

class MainActivity : AppCompatActivity() {

    override fun onCreate(savedInstanceState: Bundle?) {
        ...
    }

    companion object {
        val fruitList = arrayListOf(
            Fruit("Banana", "banana", "A banana is an edible fruit – botanically a berry – produced by several kinds of large herbaceous flowering plants in the genus Musa."),
            Fruit("Strawberry", "strawberry", "The garden strawberry is a widely grown hybrid species of the genus Fragaria, collectively known as the strawberries, which are cultivated worldwide for their fruit."),
            Fruit("Tangerine", "tangerine", "The tangerine is a group of orange-colored citrus fruit consisting of hybrids of mandarin orange."),
            Fruit("Plum", "plum", "A plum is a fruit of the subgenus Prunus of the genus Prunus.")
        )
    }
}

class FruitPagerAdapter(private val list: ArrayList<Fruit>): PagerAdapter() {

    override fun instantiateItem(container: ViewGroup, position: Int): Any {
        val inflater = LayoutInflater.from(container.context)
        val view = inflater.inflate(R.layout.layout_fruit, container, false)

        view.tvItemTitle.text = list[position].name
        view.ivItem.setImageResource(list[position].getImageId(container.context))
        view.tvItemContent.text = list[position].content

        container.addView(view)
        return view
    }

    override fun destroyItem(container: ViewGroup, position: Int, obj: Any) {
        container.removeView(obj as View?)
    }

    override fun isViewFromObject(view: View, obj: Any): Boolean {
        return view == obj
    }

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

/* MainActivity.kt */
class MainActivity : AppCompatActivity() {

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

        val adapter = FruitPagerAdapter(fruitList)
        mViewPager.adapter = adapter
    }

    companion object {
        val fruitList = arrayListOf(
            Fruit("Banana", "banana", "A banana is an edible fruit – botanically a berry – produced by several kinds of large herbaceous flowering plants in the genus Musa."),
            Fruit("Strawberry", "strawberry", "The garden strawberry is a widely grown hybrid species of the genus Fragaria, collectively known as the strawberries, which are cultivated worldwide for their fruit."),
            Fruit("Tangerine", "tangerine", "The tangerine is a group of orange-colored citrus fruit consisting of hybrids of mandarin orange."),
            Fruit("Plum", "plum", "A plum is a fruit of the subgenus Prunus of the genus Prunus.")
        )
    }
}