android列表侧滑删除&置顶，安卓开发项目实例

android:orientation=“vertical”>

</com.mcxtzhang.swipemenulib.SwipeMenuLayout>

适配器中的代码，就是普通的RecyclerView适配器，我们只需要把删除、置顶的两个点击回调，写2个对应删除、置顶的方法即可。删除方法，就是list集合删除当前的position，然后notifyDataSetChanged一下就可以了，置顶方法就是list集合，添加当前的position到集合的起始位置。

class SampleAdapter(val list: ArrayList): RecyclerView.Adapter<SampleAdapter.ViewHolder>() {
inner class ViewHolder(view:View):RecyclerView.ViewHolder(view){
val tvName:TextView=view.findViewById(R.id.tvName)
val btnTop:TextView=view.findViewById(R.id.btnTop)
val btnDelete:TextView=view.findViewById(R.id.btnDelete)
}
override fun onCreateViewHolder(parent: ViewGroup, viewType: Int): SampleAdapter.ViewHolder {
val view=LayoutInflater.from(parent.context).inflate(R.layout.item_sample,parent,false)
return ViewHolder(view)
}

override fun getItemCount()=list.size

override fun onBindViewHolder(holder: SampleAdapter.ViewHolder, position: Int) {
holder.tvName.setText(list.get(position))

//删除按钮
holder.btnDelete.setOnClickListener {
onItemClickDelete.invoke(it,position)
}
//置顶按钮
holder.btnTop.setOnClickListener {
onItemClickTop.invoke(it,position)
}
}

//删除
fun delete(position: Int){
list.removeAt(position)
notifyDataSetChanged()
}
//置顶
fun top(position: Int){
list.add(0,list.removeAt(position))
notifyDataSetChanged()
}

lateinit var onItemClickDelete: (v: View, pos: Int) -> Unit//删除
lateinit var onItemClickTop: (v: View, pos: Int) -> Unit//置顶
}

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.recyclerview.widget.RecyclerView
android:id="@+id/rv_sample"
android:layout_width=“match_parent”
android:layout_height=“match_parent”/>

</androidx.constraintlayout.widget.ConstraintLayout>

MainAcivity

class MainActivity : AppCompatActivity() {
private lateinit var rvSample:RecyclerView
override fun onCreate(savedInstanceState: Bundle?) {
super.onCreate(savedInstanceState)
setContentView(R.layout.activity_main)
rvSample=findViewById(R.id.rv_sample)

//布局管理器
val layoutManager=LinearLayoutManager(this)
layoutManager.orientation=LinearLayoutManager.VERTICAL
rvSample.layoutManager=layoutManager

val list=ArrayList()
//集合添加数据

标签：parent,安卓,list,position,android,置顶,view
来源： https://blog.csdn.net/m0_65146105/article/details/121872955