如何在Android中自定义上下左右间隔线-创新互联
本篇文章为大家展示了如何在Android中自定义上下左右间隔线,内容简明扼要并且容易理解,绝对能使你眼前一亮,通过这篇文章的详细介绍希望你能有所收获。
创新互联自2013年起,先为南乐等服务建站,南乐等地企业,进行企业商务咨询服务。为南乐企业网站制作PC+手机+微官网三网同步一站式服务解决您的所有建站问题。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:
private void initSpaceLine() { if (decor == null) { decor = new SpaceItemDecoration(ViewUtil.dp2px(5)); recycleListView.addItemDecoration(decor); } }
上述内容就是如何在Android中自定义上下左右间隔线,你们学到知识或技能了吗?如果还想学到更多技能或者丰富自己的知识储备,欢迎关注创新互联行业资讯频道。
本文标题:如何在Android中自定义上下左右间隔线-创新互联
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