recycleview 卡片 下拉刷新-百家乐凯发k8

1.添加依赖

 implementation 'androidx.cardview:cardview:1.0.0'
    implementation 'androidx.recyclerview:recyclerview:1.0.0'
    implementation "androidx.swiperefreshlayout:swiperefreshlayout:1.1.0"

2.主界面

package com.example.myapplication3
import android.graphics.color
import android.os.bundle
import android.os.handler
import androidx.appcompat.app.appcompatactivity
import androidx.recyclerview.widget.linearlayoutmanager
import androidx.recyclerview.widget.recyclerview
import androidx.swiperefreshlayout.widget.swiperefreshlayout
class mainactivity : appcompatactivity() {
    private lateinit var recyclerview: recyclerview
    private lateinit var swipe_view: swiperefreshlayout
    private lateinit var viewadapter: recyclerview.adapter<*>
    private lateinit var viewmanager: recyclerview.layoutmanager
    override fun oncreate(savedinstancestate: bundle?) {
        super.oncreate(savedinstancestate)
        setcontentview(r.layout.activity_main);
        val mydataset = mutablelistof()
        for (i in 0 until 20) {
            mydataset.add(i.tostring())
        }
        viewmanager = linearlayoutmanager(this)
        viewadapter = myadapter(mydataset)
        recyclerview = findviewbyid(r.id.recycle_view).apply {
            sethasfixedsize(true)
            layoutmanager = viewmanager
            adapter = viewadapter
        }
        swipe_view = findviewbyid(r.id.swipe_view)
        swipe_view.setcolorschemecolors(resources.getcolor(r.color.white))
        swipe_view.setprogressbackgroundcolorschemeresource(r.color.gray)
        swipe_view.setonrefreshlistener {
            //your code handler
            handler().postdelayed({ swipe_view.isrefreshing = false }, 2000)
        }
    }
}

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3.适配器

package com.example.myapplication3
import android.util.log
import android.view.layoutinflater
import android.view.view
import android.view.viewgroup
import android.widget.textview
import androidx.recyclerview.widget.recyclerview
class myadapter(private val mydataset: mutablelist) : recyclerview.adapter() {
    class myviewholder(v: view) : recyclerview.viewholder(v) {
        val textview: textview
        init {
            v.setonclicklistener { log.e("tag", "$adapterposition") }
            textview = v.findviewbyid(r.id.textviews)
        }
    }
    override fun oncreateviewholder(parent: viewgroup, viewtype: int): myviewholder {
        val v = layoutinflater.from(parent.context).inflate(r.layout.layout_item, parent, false);
        return myviewholder(v)
    }
    override fun getitemcount(): int {
        return mydataset.size
    }
    override fun onbindviewholder(holder: myviewholder, position: int) {
        holder.textview.text = mydataset[position];
    }
    companion object {
        private val tag = "customadapter"
    }
}

4.主界面布局：

5.item布局

6.color资源

   #fff
    #999

运行效果：