RecyclervIew添加分割线

创建一个类

package com.bwei.administrator.dailinxiangmu.adapter;import android.content.Context;import android.graphics.Canvas;import android.graphics.Color;import android.graphics.Paint;import android.graphics.Rect;import android.support.v7.widget.RecyclerView;import android.view.View;/** * Created by dailin on 2017/10/11. */public class Rc_ItemDecoration extends RecyclerView.ItemDecoration {    Context con;    private Paint mPaint;    private float mDividerHeight;    public Rc_ItemDecoration(Context con) {        this.con=con;        mPaint = new Paint();        mPaint.setAntiAlias(true);        mPaint.setColor(Color.parseColor("#CDC5BF"));    }    @Override    public void onDraw(Canvas c, RecyclerView parent, RecyclerView.State state) {        super.onDraw(c, parent, state);        int childCount = parent.getChildCount();        for ( int i = 0; i < childCount; i++ ) {            View view = parent.getChildAt(i);            int index = parent.getChildAdapterPosition(view);            //第一个ItemView不需要绘制            if ( index == 0 ) {                continue;            }            float dividerTop = view.getTop() - mDividerHeight;            float dividerLeft = parent.getPaddingLeft();            float dividerBottom = view.getTop();            float dividerRight = parent.getWidth() - parent.getPaddingRight();            c.drawRect(dividerLeft,dividerTop,dividerRight,dividerBottom,mPaint);        }    }    @Override    public void onDrawOver(Canvas c, RecyclerView parent, RecyclerView.State state) {        super.onDrawOver(c, parent, state);    }    @Override    public void getItemOffsets(Rect outRect, View view, RecyclerView parent, RecyclerView.State state) {        super.getItemOffsets(outRect, view, parent, state);        if (parent.getChildAdapterPosition(view) != 0){            //这里直接硬编码为1px            outRect.top = 15;            outRect.left=12;            outRect.right=12;            mDividerHeight =5;        }    }}

然后需要在主类里面比如添加布局管理器那块用RecyclerView的空件添加addItemDecoration（）就可以了

如：

//添加分割线recy_one.addItemDecoration(new Rc_ItemDecoration(getActivity()));因为我的是在Fragment里面 所以传getActivity（）；