测试两个RecyclerView联动效果，仅做Demo测试用

纯粹给自己留个记录，日后开发到类似功能可以有些想法。

MainActivity.java

package com.example.qxb_810.recyclervieweditdemo;

import android.content.Context;
import android.graphics.Color;
import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.support.v7.widget.LinearLayoutManager;
import android.support.v7.widget.PagerSnapHelper;
import android.support.v7.widget.RecyclerView;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.LinearLayout;
import android.widget.TextView;

import java.util.ArrayList;
import java.util.List;

import butterknife.BindView;
import butterknife.ButterKnife;

/**
 * 此Demo用于测试两个RecyclerView联动效果
 */
public class MainActivity extends AppCompatActivity {

    @BindView(R.id.rv_left)
    RecyclerView rvLeft;
    @BindView(R.id.ll_left)
    LinearLayout llLeft;
    @BindView(R.id.rv_right)
    RecyclerView rvRight;
    @BindView(R.id.ll_right)
    LinearLayout llRight;

    private MyAdapter mLeftAdapter;
    private MyAdapter mRightAdapter;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        ButterKnife.bind(this);

        List list = new ArrayList();
        list.add("1");
        list.add("2");
        list.add("3");
        list.add("4");
        list.add("5");
        list.add("6");
        list.add("7");
        list.add("8");
        list.add("9");
        list.add("10");
        list.add("11");
        list.add("12");
        list.add("13");
        list.add("14");
        list.addAll(list);

        // 左边
        mLeftAdapter = new MyAdapter(list, this, 1);
        rvLeft.setLayoutManager(new LinearLayoutManager(this, LinearLayoutManager.VERTICAL, false));
        rvLeft.setAdapter(mLeftAdapter);

        // 右边
        mRightAdapter = new MyAdapter(list, this, 2);
        // 限制其滑动只能一次一个item
        PagerSnapHelper snapHelper = new PagerSnapHelper();
        snapHelper.attachToRecyclerView(rvRight);
        rvRight.setLayoutManager(new LinearLayoutManager(this, LinearLayoutManager.VERTICAL, false));
        rvRight.setAdapter(mRightAdapter);
        rvRight.addOnScrollListener(new RecyclerView.OnScrollListener() {
            @Override
            public void onScrolled(RecyclerView recyclerView, int dx, int dy) {
                super.onScrolled(recyclerView, dx, dy);
                LinearLayoutManager rvRightLayoutManager = (LinearLayoutManager) rvRight.getLayoutManager();
                LinearLayoutManager rvLeftLayoutManager = (LinearLayoutManager) rvLeft.getLayoutManager();
                int position = rvRightLayoutManager.findFirstVisibleItemPosition();// 找到第一个可见的item, 获取其position
                rvLeftLayoutManager.scrollToPosition(position);
                mLeftAdapter.setCurrPostion(position);
                mLeftAdapter.notifyDataSetChanged();
            }
        });

    }

    public class MyAdapter extends RecyclerView.Adapter {
        private List list;
        private Context context;
        private int type = -1;
        private int currPosition = -1;

        public MyAdapter(List list, Context context, int type) {
            this.list = list;
            this.context = context;
            this.type = type;
        }

        @Override
        public MyViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
            View view = LayoutInflater.from(context).inflate(type == 1 ? R.layout.rv_left_item : R.layout.rv_right_item, parent, false);
            return new MyViewHolder(view);
        }

        @Override
        public void onBindViewHolder(MyViewHolder holder, int position) {
            holder.tvText.setText(list.get(position));
            if (currPosition >= 0 && currPosition < list.size() && currPosition == position) {
                holder.tvText.setTextColor(Color.BLUE);
            } else {
                holder.tvText.setTextColor(Color.BLACK);
            }
        }

        /**
         *  设置当前显示position
         * @param position
         */
        public void setCurrPostion(int position) {
            currPosition = position;
        }

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

        class MyViewHolder extends RecyclerView.ViewHolder {
            TextView tvText;

            public MyViewHolder(View itemView) {
                super(itemView);
                tvText = itemView.findViewById(R.id.tv_text);
                if (type == 1) {
                    setEvent();
                }
            }

            private void setEvent() {
                tvText.setOnClickListener(new View.OnClickListener() {
                    @Override
                    public void onClick(View v) {
                        setCurrPostion(getPosition());
                        rvRight.scrollToPosition(getPosition());
                        notifyDataSetChanged();
                    }
                });
            }
        }
    }
}

MainActivity布局