在實際開發(fā)尤其是電商項目的開發(fā)過程中瓶珊，經(jīng)常會用到分類的橫向滑動列表蚤吹，但是如果用普通的橫向列表在點擊的過程無法直接展示，這里我們就需要做到點擊每一個item去聯(lián)動滑動顯示在可視化的界面中，直接上效果

所需效果圖

import android.content.Context;
import android.util.DisplayMetrics;

import androidx.recyclerview.widget.LinearLayoutManager;
import androidx.recyclerview.widget.LinearSmoothScroller;
import androidx.recyclerview.widget.RecyclerView;

/**
 * Create by Carson on 2021/8/18.
 * 自定義recyclerView點擊item滑動居中
 */
public class CenterLayoutManager extends LinearLayoutManager {

    static int lastPosition = 0;
    static int targetPosition = 0;

    public CenterLayoutManager(Context context, int orientation, boolean reverseLayout) {
        super(context, orientation, reverseLayout);
    }

    @Override
    public void smoothScrollToPosition(RecyclerView recyclerView, RecyclerView.State state, int position) {
        CenterSmoothScroller smoothScroller = new CenterSmoothScroller(recyclerView.getContext());
        smoothScroller.setTargetPosition(position);
        startSmoothScroll(smoothScroller);
    }

    public void smoothScrollToPosition(RecyclerView recyclerView, RecyclerView.State state, int lastPosition, int position) {
        CenterLayoutManager.lastPosition = lastPosition;
        CenterLayoutManager.targetPosition = position;
        smoothScrollToPosition(recyclerView, state, position);
    }

    public static class CenterSmoothScroller extends LinearSmoothScroller {
        private static float duration = 400f;

        public CenterSmoothScroller(Context context) {
            super(context);
        }

        @Override
        public int calculateDtToFit(int viewStart, int viewEnd, int boxStart, int boxEnd, int snapPreference) {
            return (boxStart + (boxEnd - boxStart) / 2) - (viewStart + (viewEnd - viewStart) / 2);
        }

        @Override
        protected float calculateSpeedPerPixel(DisplayMetrics displayMetrics) {
            float newDuration = duration / (Math.abs(targetPosition - lastPosition));
            return newDuration / displayMetrics.densityDpi;
        }

        @Override
        protected int calculateTimeForScrolling(int dx) {
            return super.calculateTimeForScrolling(dx);
        }
    }
}

接下來就是在adapter中進(jìn)行引用了

CenterLayoutManager centerLayoutManager =
        new CenterLayoutManager(mContext, LinearLayoutManager.HORIZONTAL, false);
binding.recyclerTabSort.setLayoutManager(centerLayoutManager);
//這里省略adapter布局的方法
...
...
...
tabSortAdapter.setOnItemClickListener((adapter, view, position) -> {
    centerLayoutManager.smoothScrollToPosition(binding.recyclerTabSort,
            new RecyclerView.State(), indexPosition, position);
    if (indexPosition != position) {
        indexPosition = position;
    }
    tabSortAdapter.notifyDataSetChanged();
});