用于更改行和列跨度的 RecyclerView 布局管理器

问题描述

我希望创建以下布局(红色正方形不一定是正方形，自定义固定高度也可以).布局看起来很简单，但我没有找到适合我需求的布局管理器.

我尝试了 StaggeredGridLayoutManager 但这仅允许设置列或行的跨度，不能同时设置两者.

是否有一个能够做到这一点的自定义布局管理器?我看过 TwoWayView 但改变高度似乎有问题，图书馆没有得到维护.

有人遇到这个问题并解决了吗?

解决方案

有点晚了，但可能对其他人有帮助...

我一直在寻找相同的东西，最后，经过 2 天的谷歌搜索，我找到了一个解决方案.非常感谢

解决方案很简单:

1.下载 SpannableGridLayoutManager

样式错误将这些行放入 attrs.xml

<attr name="android:orientation"/><attr name="spanCount"/><attr name="aspectRatio" format="string"/></declare-styleable>

I am looking to create the following layout (red sqaures does not really have to be squares, a custom fixed height is also fine). The layout seems very simple yet I did not find a layout manager which suits my needs.

I tried the StaggeredGridLayoutManager but this only allows to set the span of either the column or the row, not both.

Is there floating around a custom layout manager which is able to do this?I have looked at TwoWayView but changing height seems to be problematic and the library is not being maintained.

Anyone having this problem and solved it?

解决方案

A little bit late, but it might help everyone else...

I was looking for the same and finally, after 2 days of googling I found a solution. Big thanks to Nick Butcher! His layout manager called SpannableGridLayoutManager is capable of doing this. In my case I was doing a pattern like your first two rows:

Solution is easy:

1. Download SpannableGridLayoutManager from here

For some reason I had to change this line:

while (availableSpace > 0 && lastVisiblePosition < lastItemPosition) {

to

while (lastVisiblePosition < lastItemPosition) {

to got the manager working.

2. Set SpannableGridLayoutManger to your RecyclerView

In my case:

    SpannedGridLayoutManager manager = new SpannedGridLayoutManager(
            new SpannedGridLayoutManager.GridSpanLookup() {
                @Override
                public SpannedGridLayoutManager.SpanInfo getSpanInfo(int position) {
                    // Conditions for 2x2 items
                    if (position % 6 == 0 || position % 6 == 4) {
                        return new SpannedGridLayoutManager.SpanInfo(2, 2);
                    } else {
                        return new SpannedGridLayoutManager.SpanInfo(1, 1);
                    }
                }
            },
            3, // number of columns
            1f // how big is default item
    );

Which gave me exactly what I wanted (numbers are position of item in adapter):

EDIT: error with styleablePut those lines into attrs.xml

<declare-styleable name="SpannedGridLayoutManager">
    <attr name="android:orientation" />
    <attr name="spanCount" />
    <attr name="aspectRatio" format="string" />
</declare-styleable>

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