Android ScrollView 布局问题

Android ScrollView layout problem

提问by Aaron

I have several ListViews in a LinearLayout. It's listing things by day, so I have a TextView containing "Sunday:" followed by a list of items, followed by a "Monday" TextView, etc. Works great, but doesn't fit in the screen. So I added a ScrollView as a parent of the LinearLayout. Now it scrolls, but the ListViews all have room for 2 entries, whether they have 0 or 3 entries. Something about adding the ScrollView parent caused the ListViews to not size dynamically. I tried calling requestLayout() on the ScrollView after the list adapters had filled their views, but that didn't do anything. Any ideas?

我在 LinearLayout 中有几个 ListView。它按天列出事物，所以我有一个包含“Sunday:”的 TextView，然后是项目列表，然后是“Monday”TextView 等。效果很好，但不适合屏幕。所以我添加了一个 ScrollView 作为 LinearLayout 的父级。现在它会滚动，但 ListViews 都有 2 个条目的空间，无论它们是 0 还是 3 个条目。添加 ScrollView 父级的一些事情导致 ListViews 无法动态调整大小。在列表适配器填充视图后，我尝试在 ScrollView 上调用 requestLayout() ，但这没有做任何事情。有任何想法吗？

Edit: From http://www.anddev.org/viewtopic.php?p=25194and other links it seems that ListViews inside a ScrollView are not handled correctly. Anyone have a good suggestion for implementing a list-of-lists?

编辑：从http://www.anddev.org/viewtopic.php?p=25194和其他链接看来，ScrollView 中的 ListViews 没有正确处理。任何人都对实施列表列表有很好的建议吗？

回答by svens

I'm interested in that topic too, so I did a bit of research. First: Never put a ListView in a ScrollView (as you found out yourself). Unfortunately googling this problem doesn't lead to any solutions, so I tried my suggestion from my comment above.

我对这个话题也很感兴趣，所以我做了一些研究。第一：永远不要将 ListView 放在 ScrollView 中（正如您自己发现的那样）。不幸的是，谷歌搜索这个问题并没有找到任何解决方案，所以我尝试了我上面评论中的建议。

I implemented a custom ListAdapter and put the ListViews into one parent ListView. This doesn't work (leads to the same problem as with a ScrollView). Speaking to the guys on the official android-irc #android-dev on freenode, they told me that putting ListViews into a ListView is as bad as or even worse than putting them into a ScrollView. Unfortunately they also couldn't help me with the problem.

我实现了一个自定义 ListAdapter 并将 ListViews 放入一个父 ListView。这不起作用（导致与 ScrollView 相同的问题）。在与 freenode 上的官方 android-irc #android-dev 上的人交谈时，他们告诉我将 ListViews 放入 ListView 与将它们放入 ScrollView 一样糟糕甚至更糟。不幸的是，他们也无法帮助我解决这个问题。

There seems to be only one way to achieve what you want to do; see the answer on this similar question Scrolling with Multiple ListViews for Android. The idea is to merge all ListViews into a single one by a custom adapter and to insert some kind of headers between entries. This is absolutely doable but might require some special effort.

似乎只有一种方法可以实现您想做的事情；请参阅此类似问题的答案Scrolling with Multiple ListViews for Android。这个想法是通过自定义适配器将所有 ListViews 合并为一个，并在条目之间插入某种标题。这是绝对可行的，但可能需要一些特殊的努力。

回答by Kiran Parmar

I know it's late to answer this right now, but still - it may be useful to others who arrive here in case of similar problems.

我知道现在回答这个问题为时已晚，但仍然 - 如果遇到类似问题，它可能对到达这里的其他人有用。

I'd suggest that you use an Expandable ListView for this. It would solve all of your problems. You can have the main/parent names as that of week, and when you expand it, you would have the list of entries for that particular day/week/whatever. Also, you wouldn't have to worry about scrolling as it is taken care by android :)

我建议您为此使用可扩展的 ListView。它会解决你所有的问题。您可以将主要/父名称作为周的名称，当您展开它时，您将拥有该特定日期/周/任何内容的条目列表。此外，您不必担心滚动，因为它是由 android 照顾的 :)

If you DO try this, then please let me know if this works out for your problem Try searching for examples on Expandable ListView.

如果您尝试这样做，请告诉我这是否能解决您的问题 尝试在可扩展 ListView 上搜索示例。

edit:check example here - http://mylifewithandroid.blogspot.com/2008/05/expandable-lists.html

编辑：在这里检查示例 - http://mylifewithandroid.blogspot.com/2008/05/expandable-lists.html