之前在使用XRecyclerView的實現下拉重新整理，上拉載入更多的時候，當資料量較少的時候，最下面一行的資料的分割線多了一個，很是鬱悶。如下圖

後來看了分割線的原始碼，發現由於新增分割線的時候把XRecyclerView的footerview也算成了一個childView，所以多添加了一個。所以解決辦法是在分割線類RecyclerViewDivider計算childView的個數完成後減一就行了

    final int childSize = parent.getChildCount()-1;

以下是萬能分割線修改之後的全部程式碼

public class RecyclerViewDivider
 
  extends RecyclerView.ItemDecoration {

        private Paint mPaint;
        private Drawable mDivider;
        private int mDividerHeight = 2;//分割線高度，預設為1px
        private int mOrientation;//列表的方向：LinearLayoutManager.VERTICAL或LinearLayoutManager.HORIZONTAL
        private static final int[] ATTRS = new
 
 int[]{android.R.attr.listDivider};

        /**
         * 預設分割線：高度為2px，顏色為灰色
         *
         * @param context
         * @param orientation 列表方向
         */
        public RecyclerViewDivider(Context context, int orientation) {
                if (orientation != LinearLayoutManager.VERTICAL && orientation != LinearLayoutManager.HORIZONTAL) {
                        throw
 
 new IllegalArgumentException("請輸入正確的引數！");
                }
                mOrientation = orientation;

                final TypedArray a = context.obtainStyledAttributes(ATTRS);
                mDivider = a.getDrawable(0);
                a.recycle();
        }

        /**
         * 自定義分割線
         *
         * @param context
         * @param orientation 列表方向
         * @param drawableId  分割線圖片
         */
        public RecyclerViewDivider(Context context, int orientation, int drawableId) {
                this(context, orientation);
                mDivider = ContextCompat.getDrawable(context, drawableId);
                mDividerHeight = mDivider.getIntrinsicHeight();
        }

        /**
         * 自定義分割線
         *
         * @param context
         * @param orientation   列表方向
         * @param dividerHeight 分割線高度
         * @param dividerColor  分割線顏色
         */
        public RecyclerViewDivider(Context context, int orientation, int dividerHeight, int dividerColor) {
                this(context, orientation);
                mDividerHeight = dividerHeight;
                mPaint = new Paint(Paint.ANTI_ALIAS_FLAG);
                mPaint.setColor(dividerColor);
                mPaint.setStyle(Paint.Style.FILL);
        }


        //獲取分割線尺寸
        @Override
        public void getItemOffsets(Rect outRect, View view, RecyclerView parent, RecyclerView.State state) {
                super.getItemOffsets(outRect, view, parent, state);
                outRect.set(0, 0, 0, mDividerHeight);
        }

        //繪製分割線
        @Override
        public void onDraw(Canvas c, RecyclerView parent, RecyclerView.State state) {
                super.onDraw(c, parent, state);
                if (mOrientation == LinearLayoutManager.VERTICAL) {
                        drawVertical(c, parent);
                } else {
                        drawHorizontal(c, parent);
                }
        }

        //繪製橫向 item 分割線
        private void drawHorizontal(Canvas canvas, RecyclerView parent) {
                final int left = parent.getPaddingLeft();
                final int right = parent.getMeasuredWidth() - parent.getPaddingRight();
                final int childSize = parent.getChildCount()-1;
                for (int i = 0; i < childSize; i++) {
                        final View child = parent.getChildAt(i);
                        RecyclerView.LayoutParams layoutParams = (RecyclerView.LayoutParams) child.getLayoutParams();
                        final int top = child.getBottom() + layoutParams.bottomMargin;
                        final int bottom = top + mDividerHeight;
                        if (mDivider != null) {
                                mDivider.setBounds(left, top, right, bottom);
                                mDivider.draw(canvas);
                        }
                        if (mPaint != null) {
                                canvas.drawRect(left, top, right, bottom, mPaint);
                        }
                }
        }

        //繪製縱向 item 分割線
        private void drawVertical(Canvas canvas, RecyclerView parent) {
                final int top = parent.getPaddingTop();
                final int bottom = parent.getMeasuredHeight() - parent.getPaddingBottom();
                final int childSize = parent.getChildCount()-1;
                for (int i = 0; i < childSize; i++) {
                        final View child = parent.getChildAt(i);
                        RecyclerView.LayoutParams layoutParams = (RecyclerView.LayoutParams) child.getLayoutParams();
                        final int left = child.getRight() + layoutParams.rightMargin;
                        final int right = left + mDividerHeight;
                        if (mDivider != null) {
                                mDivider.setBounds(left, top, right, bottom);
                                mDivider.draw(canvas);
                        }
                        if (mPaint != null) {
                                canvas.drawRect(left, top, right, bottom, mPaint);
                        }
                }
        }
}