本文实例为大家分享了Android自定义SpaceItemDecoration分割线的具体代码，供大家参考，具体内容如下
此线是在RecyclerView中的GridlayoutManager中使用的 效果图如下：
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/** * author: Y_Qing * date: 2018/5/7 */public class SpaceItemDecoration extends RecyclerView.ItemDecoration { private int space; Paint mPaint; public SpaceItemDecoration(int space) { this.space = space; mPaint = new Paint(Paint.ANTI_ALIAS_FLAG); mPaint.setColor(0xffededed); mPaint.setStyle(Paint.Style.FILL); } private static final int HORIZONTAL = 355; @Override public void getItemOffsets(Rect outRect, View view, RecyclerView parent, RecyclerView.State state) { int itemViewType = parent.getLayoutManager().getItemViewType(view); if (itemViewType == HORIZONTAL) { //根据ViewType类型来判断是否展示线 outRect.bottom = space; if (parent.getChildLayoutPosition(view) % 2 == 0) { outRect.right = space / 2; outRect.left = space; } else { outRect.right = space; outRect.left = space / 2; } } } @Override public void onDraw(Canvas c, RecyclerView parent, RecyclerView.State state) { c.save(); if (parent.getLayoutManager() instanceof GridLayoutManager) { if ((((GridLayoutManager) parent.getLayoutManager())).getSpanCount() == 2) { draw(c, parent); } } c.restore(); } //绘制横向 item 分割线 private void draw(Canvas canvas, RecyclerView parent) { int childSize = parent.getChildCount(); for (int i = 0; i < childSize; i++) { View child = parent.getChildAt(i); RecyclerView.LayoutParams layoutParams = (RecyclerView.LayoutParams) child.getLayoutParams(); int left = child.getLeft(); int right = child.getRight(); int top = child.getBottom() + layoutParams.bottomMargin; int bottom = top + space; if (mPaint != null) { canvas.drawRect(left, top, right, bottom, mPaint);//绘制图片下放的水平线 } if (parent.getChildLayoutPosition(child) % 2 == 0) { canvas.drawRect(0, child.getTop(), left, child.getBottom() + space, mPaint);//绘制左边图片的左间线 } top = child.getTop(); bottom = child.getBottom() + space; left = child.getRight() + layoutParams.rightMargin; right = left + space; if (mPaint != null) { canvas.drawRect(left, top, right, bottom, mPaint);//绘制图片的右间线 } } }} |
使用方法下:
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private void initSpaceLine() { if (decor == null) { decor = new SpaceItemDecoration(ViewUtil.dp2px(5)); recycleListView.addItemDecoration(decor); } } |
以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持服务器之家。
原文链接：https://blog.csdn.net/u014469691/article/details/80666215
