安卓用RecyclerView实现横向滑动列表

本文主要是介绍安卓用RecyclerView实现横向滑动列表，希望对大家解决编程问题提供一定的参考价值，需要的开发者们随着小编来一起学习吧！

背景

通常我们遇到的是纵向滑动列表,但是也会有横向滑动列表.那横向的怎么做呢?

解决方案

其实很简单,绝大部分代码和纵向是一样的,只有一个设置不一样.

实现效果
关键代码

recyclerView.layoutManager = LinearLayoutManager(this, RecyclerView.HORIZONTAL, false)

完整代码
1). MainActivity.kt

class MainActivity : AppCompatActivity() {lateinit var adapter: RvAdapteroverride fun onCreate(savedInstanceState: Bundle?) {super.onCreate(savedInstanceState)setContentView(R.layout.activity_main)initRecyclerView()loadData()}private fun initRecyclerView() {recyclerView.layoutManager = LinearLayoutManager(this, RecyclerView.HORIZONTAL, false)adapter = RvAdapter()recyclerView.adapter = adapter}private fun loadData() {val data = ArrayList<String>(100)for (i in 0..99) {data.add("text-$i")}adapter.setData(data)}
}

2). RvAdapter.kt

class RvAdapter : RecyclerView.Adapter<RecyclerView.ViewHolder>() {private var mDataList = mutableListOf<String>()private lateinit var mContext: Contextoverride fun onBindViewHolder(holder: RecyclerView.ViewHolder, position: Int) {val data = mDataList[position]holder.itemView.textView.text = dataholder.itemView.setOnClickListener {setOnItemClickListener(data)}}fun setData(dataList: List<String>) {mDataList.clear()mDataList.addAll(dataList)notifyDataSetChanged()}override fun getItemCount(): Int = mDataList.sizeoverride fun onCreateViewHolder(parent: ViewGroup, viewType: Int): ViewHolder {mContext = parent.contextval view = LayoutInflater.from(mContext).inflate(R.layout.item_rv, parent, false)return ViewHolder(view)}private fun setOnItemClickListener(data: String) {mContext.toast(data)}class ViewHolder(itemView: View?) : RecyclerView.ViewHolder(itemView!!)}

3). 布局文件

activity_main.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"xmlns:tools="http://schemas.android.com/tools"android:layout_width="match_parent"android:layout_height="match_parent"tools:context=".MainActivity"><androidx.recyclerview.widget.RecyclerViewandroid:id="@+id/recyclerView"android:layout_gravity="center"android:layout_width="match_parent"android:layout_height="wrap_content" />
</LinearLayout>

item_rv.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"android:layout_width="wrap_content"android:layout_height="wrap_content"android:layout_gravity="center"android:orientation="vertical"><Viewandroid:layout_width="match_parent"android:layout_height="1dp"android:background="@android:color/darker_gray" /><LinearLayoutandroid:layout_width="wrap_content"android:layout_height="100dp"><TextViewandroid:id="@+id/textView"android:layout_width="wrap_content"android:layout_height="match_parent"android:layout_marginLeft="10dp"android:layout_marginRight="10dp"android:gravity="center"android:text="text" /><Viewandroid:layout_width="1dp"android:layout_height="match_parent"android:background="@android:color/darker_gray" /></LinearLayout><Viewandroid:layout_width="match_parent"android:layout_height="1dp"android:background="@android:color/darker_gray" />
</LinearLayout>