机器人 - 多可视项目的水平滚动 [英] Android - horizontal scrolling of multiple viewable items

问题描述

编辑：看到了自己的答案简单的解决方案

See my own answer for easy solution

重要：赏金供清晰的方式来修改ViewPager满足下面列出的场景。请不要提供Horizo​​ntalScrollView - 我需要全生命周期的片段场景覆盖的

我需要实施片段为基础的观点，其中一个项目是在中心和项目水平滚动的左/右部分或完全可见。 ViewPager 病适合的任务，因为它专注于显示一个项目在每个时间。

I need to implement horizontal scrolling of Fragments-based views in which one item is in the center and items to the right/left are partially or fully visible. ViewPager is ill suitable for the task since it's focused on displaying one item at each time.

要更容易地理解下面是一个快速草图，其中1，5和6项是可视区域之外。而且，想使这个可视数字配置的，因此例如在纵向视图我将只显示2（或可能只有一个）项目。

To make it easier to understand below is a quick sketch in which items 1, 5 and 6 are outside of viewable area. And and want to make this viewable number configurable so for example in portrait view I will only show 2 (or possibly just one) items.

我不是适合说3个项目在屏幕上，只要中央项目显示为其他人可以进行裁剪。在小屏幕即可有1个中心项目，并在尺寸多为画面的增长（裁剪即可）项应显示

I'm not trying to fit say 3 items on the screen, as long as central item is shown others can be cropped. On the small screen is OK to have 1 central item and as screen grows in size multiple (cropped is OK) items should be shown

据我所知，这看起来像一个画廊但同样的项目不是简单的图像，但片段与垂直滚动列表中的每个片段

I understand that this looks like a gallery but again the items are not simple images but Fragments with a vertically scrollable list in each fragment

P.S。发现这个博文由@Commonsware的列表3种不同的方法的。对于我的需要，我喜欢＃3

P.S. Found this blogpost by @Commonsware that list 3 different approaches. For my need I like #3

推荐答案

这其中有令人惊讶的简单的答案，我甚至不知道为什么它没有公布的时候了。所有这一切，我需要做的就是确切的作用是覆盖 PagerAdapter＃getPageWidth 方法。默认情况下它返回1，但如果你将其设置为0.5，你会得到2页，0.33会给你3等。根据宽度寻呼机项之间的分隔符，你可能要稍微降低的价值。

This one has surprisingly easy answer, I'm not even sure why it wasn't posted right away. All that I needed to do to get the exact effect was to override PagerAdapter#getPageWidth method. By default it returns 1 but if you set it to 0.5 you will get 2 pages, 0.33 will give you 3, etc. Depending on width of the separator between pager items you may have to slightly decrease the value.

请参阅下面的代码片断：

See the following snippet:

    @Override
    public float getPageWidth(final int position) {
        // this will have 3 pages in a single view
        return 0.32f;
    }

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