Recycleview1 显示垂直排布框，点击弹出对应id

Recycleadapter 适配器文件内容

package Recyclerview;//Recycleview的适配器

import android.content.Context;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.AdapterView;
import android.widget.ListAdapter;
import android.widget.TextView;
import android.widget.Toast;

import androidx.annotation.NonNull;
import androidx.recyclerview.widget.RecyclerView;
import androidx.recyclerview.widget.RecyclerView.Adapter;

import com.example.myapplication1.R;

public class RecycleAdapter extends Adapter<RecycleAdapter.LinearViewHolder> {//可以当成一个模版套用
    private Context mContext;
    private OnItemClickListner mlistener;


    public RecycleAdapter(Context context, OnItemClickListner listener){
        this.mContext = context;
        this.mlistener = listener;
    }

    @NonNull
    @Override
    public RecycleAdapter.LinearViewHolder onCreateViewHolder(@NonNull ViewGroup parent, int viewType) {//获得一个new布局

        return new LinearViewHolder(LayoutInflater.from(mContext).inflate(R.layout.layout_linear_item,parent,false));//
    }

    @Override
    public void onBindViewHolder(@NonNull RecycleAdapter.LinearViewHolder holder, final int position) {
        holder.textView.setText("hello world");//单纯的输入文字
        holder.itemView.setOnClickListener(new View.OnClickListener() {//跳出弹窗显示对应的图框的id；
            @Override
            public void onClick(View view) {
                //Toast.makeText(mContext,"click+..."+position,Toast.LENGTH_SHORT).show();
                mlistener.onClick(position);
            }
        });
    }

    @Override
    public int getItemCount() {//列表的长度
        return 30;
    }

    class LinearViewHolder extends RecyclerView.ViewHolder {//在这里声明layout——linear_item布局里的控件
        private TextView textView;
        public LinearViewHolder(@NonNull View itemView) {
            super(itemView);
            textView = itemView.findViewById(R.id._tv_title);
        }
    }

    public interface OnItemClickListner{//创建一个接口
        void onClick(int pos);
    }
}

Recycler2Activity文件

package Recyclerview;

import androidx.annotation.NonNull;
import androidx.appcompat.app.AppCompatActivity;
import androidx.recyclerview.widget.LinearLayoutManager;
import androidx.recyclerview.widget.RecyclerView;

import android.graphics.Rect;
import android.os.Bundle;
import android.view.View;
import android.widget.Toast;

import com.example.myapplication1.R;

public class Recyclerview2Activity extends AppCompatActivity {

    private RecyclerView mrecycle;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_recyclerview2);
        mrecycle = findViewById(R.id._recycle);
        mrecycle.setLayoutManager(new LinearLayoutManager(Recyclerview2Activity.this));//线性布局管理器；
        mrecycle.addItemDecoration(new myDecoration());//分割线
        mrecycle.setAdapter(new RecycleAdapter(Recyclerview2Activity.this, new RecycleAdapter.OnItemClickListner() {
            @Override
            public void onClick(int pos) {
                Toast.makeText(Recyclerview2Activity.this, "click"+pos, Toast.LENGTH_SHORT).show();
            }
        })); //调用adapter
    }

    class myDecoration extends RecyclerView.ItemDecoration{//设置分割线，recycleview2中的背景色是分割线的颜色，linearitem里面的颜色是每一个框框颜色。
        @Override
        public void getItemOffsets(@NonNull Rect outRect, @NonNull View view, @NonNull RecyclerView parent, @NonNull RecyclerView.State state) {
            super.getItemOffsets(outRect, view, parent, state);
            outRect.set(0,0,0,getResources().getDimensionPixelOffset(R.dimen.dividerHeight));
        }
    }
}

本文地址：https://blog.csdn.net/hahahaki/article/details/107519098