RecyclearView的基本使用

        <androidx.recyclerview.widget.RecyclerView
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:id="@+id/rcv"
        />

创建一个布局文件为Recylerview设置显示的格式
创建Adapter

public class MyRecyclerAdapter extends RecyclerView.Adapter<MyRecyclerAdapter.MyViewHolder> {

    private List<ItemBean> itemBeans;
    private LayoutInflater layoutInflater;
    private Context context;

    public MyRecyclerAdapter(Context context , List<ItemBean> itemBeans){
        this.context = context;
        this.itemBeans = itemBeans;
        layoutInflater = LayoutInflater.from(context);
    }

    //创建ViewHolder
    @NonNull
    @Override
    public MyViewHolder onCreateViewHolder(@NonNull ViewGroup parent, int viewType) {
        //实例化显示格式的布局文件
        View view = layoutInflater.inflate(R.layout.list_item_layout, parent, false);
        MyViewHolder myViewHolder = new MyViewHolder(view);
        return myViewHolder;
    }

    @Override
    public void onBindViewHolder(@NonNull MyViewHolder holder, int position) {
        ItemBean itemBean = itemBeans.get(position);
        holder.textViewTitle.setText(itemBean.getTitle());
        holder.textViewBody.setText(itemBean.getContent());
        holder.relativeLayout.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                
            }
        });


    }

    @Override
    public int getItemCount() {
        return itemBeans.size();
    }

    class MyViewHolder extends RecyclerView.ViewHolder{
        TextView textViewTitle;
        TextView textViewBody;
        ImageView imageView;
        //点击事件 （头id）
        RelativeLayout relativeLayout;
        public MyViewHolder(@NonNull View itemView) {
            super(itemView);
            textViewTitle = itemView.findViewById(R.id.tv_title);
            textViewBody = itemView.findViewById(R.id.tv_body);
            imageView = itemView.findViewById(R.id.iv_img);
            //点击事件
            relativeLayout = itemView.findViewById(R.id.rl_item_container);
        }
    }
}

Activity

    private RecyclerView recyclerView;
    private List<ItemBean> itemBeans;
    private MyRecyclerAdapter myRecyclerAdapter;

    private void initView() {
        recyclerView = findViewById(R.id.rcv);
    }

        private void initData() {
        //创建数组
        itemBeans = new ArrayList<>();
        //准备数据
        ItemBean itemBean1 = new ItemBean();
        itemBean1.setTitle("我是i但撒谎嗲是丢啊是大i撒谎的奥萨蒂还大还大阿萨");
        itemBean1.setContent("ldksudoijclxjd4fef51er35f1");
        //数据添加到数组中
        itemBeans.add(itemBean1);
    }

    private void initAdapter() {
        myRecyclerAdapter = new MyRecyclerAdapter(this,itemBeans);
        recyclerView.setAdapter(myRecyclerAdapter);
        //设置显示模式 有三种
        //线性布局 (第一个参数上下文、第二个显示的方向、第三个是否反转(从下往上))
        //LinearLayoutManager linearLayoutManager = new LinearLayoutManager(this,LinearLayoutManager.HORIZONTAL,false);
        //网格布局 (第一个参数上下文、第二个显示的格子几个、第三个是否反转(从下往上))
        //GridLayoutManager gridLayoutManager = new GridLayoutManager(this,2);
        //破布流布局 (第一个每行几个、第二个方向、)
        StaggeredGridLayoutManager staggeredGridLayoutManager = new StaggeredGridLayoutManager(3, StaggeredGridLayoutManager.HORIZONTAL);
        recyclerView.setLayoutManager(staggeredGridLayoutManager);
    }