1.Layout聲明ViewPager 並添加屬性

<androidx.viewpager.widget.ViewPager
        android:id="@+id/viewPager"
        android:layout_width="0dp"
        android:layout_height="0dp"
        android:layout_marginTop="8dp"
        android:layout_marginBottom="8dp"
        android:clipToPadding="false"     //最必要的屬性
        android:paddingLeft="15dp"        //最必要的屬性
        android:paddingRight="15dp"       //最必要的屬性
        app:layout_constraintBottom_toTopOf="@+id/guideline"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="parent" />

2.新增三個Layout 直接塞ImageView就好了

 <ImageView
        android:scaleType="centerCrop"
        android:id="@+id/imageView"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="parent"
        app:srcCompat="@drawable/bg1" />

 <ImageView
        android:scaleType="centerCrop"
        android:id="@+id/imageView"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="parent"
        app:srcCompat="@drawable/bg2" />

 <ImageView
        android:scaleType="centerCrop"
        android:id="@+id/imageView"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="parent"
        app:srcCompat="@drawable/bg3" />

3.將3個Layout塞入List中,並添加自定義Adapter

import android.annotation.SuppressLint
import android.os.Bundle
import android.view.LayoutInflater
import android.view.View
import android.view.ViewGroup
import androidx.appcompat.app.AppCompatActivity
import androidx.viewpager.widget.PagerAdapter
import kotlinx.android.synthetic.main.activity_main.*


class MainActivity : AppCompatActivity() {

    var list = mutableListOf<View>()

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

        list.add(LayoutInflater.from(this).inflate(R.layout.tab1, null))
        list.add(LayoutInflater.from(this).inflate(R.layout.tab2, null))
        list.add(LayoutInflater.from(this).inflate(R.layout.tab3, null))

        viewPager.pageMargin = 15  //圖片與圖片之間的距離大小
        viewPager.adapter = MyPageAdapter()
    }

    inner class MyPageAdapter : PagerAdapter() {

        override fun destroyItem(container: ViewGroup, position: Int, `object`: Any) {
            container.removeView(list[position])
        }

        override fun instantiateItem(container: ViewGroup, position: Int): Any {
            container.addView(list[position])
            return list[position]
        }

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

        override fun getCount() = list.size
    }
}

4.效果展示