【Android 界面效果49】RecyclerView高度随Item自适应

最新推荐文章于 2024-09-03 14:30:08 发布

mazouri

最新推荐文章于 2024-09-03 14:30:08 发布

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本文链接：https://blog.youkuaiyun.com/dongdong230/article/details/50452246

编写RecyclerView.ItemDecoration时，在onDraw方法中，Drawable的高度等于RecyclerView的高度减去RecyclerView的上下padding。

@Override
    public void onDraw(Canvas c, RecyclerView parent, State state) {
        int top = parent.getPaddingTop();
        int bottom = parent.getHeight() - parent.getPaddingBottom();
        int childCount = parent.getChildCount();
        for(int i=0;i < childCount;i++){
            View child = parent.getChildAt(i);
            RecyclerView.LayoutParams layoutParams = (RecyclerView.LayoutParams)child.getLayoutParams();
            int left = child.getRight() + layoutParams.rightMargin;
            int right = left + mDivider.getIntrinsicWidth();
            mDivider.setBounds(left, top, right, bottom);
            mDivider.draw(c);
        }
    }