简单有效的ItemDecoration--分割线

1、ItemDecoration

class ItemDecoration extends RecyclerView.ItemDecoration {        private Drawable mDivider;            public ItemDecoration(Drawable divider) {            mDivider = divider;        }                @Override        public void getItemOffsets(Rect outRect, View view, RecyclerView parent, RecyclerView.State state) {            super.getItemOffsets(outRect, view, parent, state);                    if (parent.getChildAdapterPosition(view) == 0) {                return;            }                    outRect.top = mDivider.getIntrinsicHeight();        }            @Override        public void onDraw(Canvas canvas, RecyclerView parent, RecyclerView.State state) {            int dividerLeft = parent.getPaddingLeft();            int dividerRight = parent.getWidth() - parent.getPaddingRight();                    int childCount = parent.getChildCount();            for (int i = 0; i < childCount - 1; i++) {                View child = parent.getChildAt(i);                            RecyclerView.LayoutParams params = (RecyclerView.LayoutParams) child.getLayoutParams();                            int dividerTop = child.getBottom() + params.bottomMargin;                int dividerBottom = dividerTop + mDivider.getIntrinsicHeight();                            mDivider.setBounds(dividerLeft, dividerTop, dividerRight, dividerBottom);                mDivider.draw(canvas);            }        }    }

2、divider drawable

如果想更改分割线颜色和宽度在下面改

<?xml version="1.0" encoding="utf-8"?><shape xmlns:android="http://schemas.android.com/apk/res/android"       android:shape="rectangle">    <size android:height="1px" />    <solid android:color="#888" />shape>

3、使用代码

Drawable drawable = mContext.getDrawable(R.drawable.divider);mRecyclerView.addItemDecoration(new ItemDecoration(drawable));

1、ItemDecoration

2、divider drawable

3、使用代码

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