Android实现ViewPager适配器kotlin简单实现
Android实现ViewPager适配器kotlin
效果
在n个视图间水平滑动切换
注意是viewpager实现的，viewpager2的适配器和1不同
1.适配器类kotlin代码
类名：VPAdapter
属性：
layoutList整型列表，保存要切换的视图id
context上下文，即调用它的Activity
itemCount：页数，从1开始
override时记得把高亮的todo提示删掉
package com.xayah.gesturesdemo.activity.tiktok
import android.content.Context
import android.view.View
import android.view.ViewGroup
import androidx.recyclerview.widget.RecyclerView
import androidx.recyclerview.widget.RecyclerView.Adapter
import androidx.viewpager.widget.PagerAdapter
import com.xayah.gesturesdemo.R
/*
*name: GesturesDemo
*description:
*/
class VPAdapter() : PagerAdapter () {
private lateinit var layoutList: IntArray
private lateinit var context: Context
private var itemCount = 1
constructor(context: Context,itemCount:Int,layoutList:IntArray) : this(){
this.context = context
this.itemCount = itemCount
this.layoutList = layoutList
}
override fun getCount(): Int {
return this.itemCount
}
override fun isViewFromObject(view: View, `object`: Any): Boolean {
return view==`object`
}
override fun instantiateItem(container: ViewGroup, position: Int): Any {
val view = View.inflate(context,this.layoutList[position],null)
container.addView(view)
return view
}
override fun destroyItem(container: ViewGroup, position: Int, `object`: Any) {
super.destroyItem(container, position, `object`)
}
}
2.activity调用适配器
var layouts = intArrayOf(
R.layout.activity_tiktok_view1,
R.layout.activity_tiktok_view2
)
var viewPager = findViewById<ViewPager>(R.id.tiktok_viewpage)
viewPager.adapter = VPAdapter(this,2,layouts)
很简单吧
参考：
https://blog.csdn.net/whjk20/article/details/107338023