如何使用可选列表与上下文动作条？ [英] How do I use a selectable list with a contextual actionbar?
问题描述
我读了全新的Android设计标准在这里： http://developer.android。 COM /设计/模式/ selection.html 并想知道第一次如何使我的ListView选择（因为长presses现在应该选择项目，没有表现出像以前那样上下文菜单），然后找出如何将这些信息传递给动作条，以便根据什么选择（多少选择项目时）我可以做一个上下文动作条。我已经签出几个网站，包括 http://www.vogella.de/articles/ AndroidListView / article.html ，但它并没有说明如何做到这一点对ICS的动作条。
I was reading the new Android Design Standards here: http://developer.android.com/design/patterns/selection.html and was wondering first how to make my ListView selectable (because long presses are now supposed to select items, not show a context menu like before), then to figure out how to pass that information to the ActionBar so I can make a contextual ActionBar based on what is selected (and how many items are selected). I've checked out several sites, including http://www.vogella.de/articles/AndroidListView/article.html but it doesn't show how to do it for ICS with the ActionBar.
我不给任何code道歉，但我还没有与列表视图除了使自定义的做任何事情。
I apologize for not giving any code, but I haven't had to do anything with listviews aside from making custom ones.
推荐答案
在第一部分（选择列表项），你需要做两件事情：
For the first part (select list item), you need to do a couple things:
-Depending上下文，设置的ListView为单个或多个选择（取决于您的应用程序），使用setChoiceMode方法。
-Depending on the context, set your ListView to either single or multiple choice (depending on your app), using the setChoiceMode method.
lv.setChoiceMode(ListView.CHOICE_MODE_SINGLE);
// or
lv.setChoiceMode(ListView.CHOICE_MODE_MULTIPLE);
- 为了作为选择标记的项目，只是听久preSS并调用ListView的setItemChecked方法。
-in order to mark the item as selected, just listen for a long press and call the ListView's setItemChecked method.
lv.setItemChecked(position, true);
最后，为了使ListView项显示为选中状态，您需要将以下属性添加到该ListView项自定义XML布局：
安卓背景=机器人：ATTR / activatedBackgroundIndicator
Finally, in order for the listview item to show as selected, you need to add the following attribute to the custom XML layout for that listview item:
android:background="?android:attr/activatedBackgroundIndicator"
有关创建上下文动作条，这个过程稍微详细一点，但它在的使用上下文操作模式部分。
For creating contextual Action Bar, the process is a little more detailed, but it's outlined in the Android Developer guide in the Using Contextual Action Mode section.
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