显示当前选择在ListView [英] Showing the current selection in a listview

问题描述

正如在Gmail中的平板电脑版和谷歌谈我试图显示当前选择的列表视图。我知道这是不是标准的做法和必要。我的计划时，列表视图常是在屏幕上，单击的项目显示了一个新的片段向右（类似Gmail和谷歌谈）应尽​​量避免。

要避免用户在猜测哪些项目已经选定我想显示当前选择，我试图创造一个选择，但它被点击它变回正常的背景后。

我怎样才能做到这一点？

这是我的选择XML

 ＆LT;选择的xmlns：机器人=htt​​p://schemas.android.com/apk/res/android＆GT;
＆LT;项目机器人：可绘制=@可绘制/ list_item_bg2机器人：STATE_ pressed =假的Andr​​oid版本：state_selected =假
    机器人：state_focused =FALSE/＆GT;
＆LT;项目机器人：可绘制=@可绘制/ list_item_selected_bg2机器人：STATE_ pressed =真/＆GT;
＆LT;项目机器人：可绘制=@可绘制/ list_item_selected_bg2机器人：STATE_ pressed =假的Andr​​oid版本：state_focused =假
    机器人：state_selected =真正的机器人：state_checked =FALSE/＆GT;
＆LT;项目机器人：可绘制=@可绘制/ list_item_selected_bg2机器人：STATE_ pressed =假的Andr​​oid版本：state_focused =真
    机器人：state_selected =FALSE/＆GT;
＆LT;项目机器人：可绘制=@可绘制/ list_item_selected_bg2机器人：STATE_ pressed =假的Andr​​oid版本：state_focused =假
    机器人：state_selected =假的Andr​​oid版本：state_checked =真/＆GT;
＆LT;项目机器人：可绘制=@可绘制/ list_item_selected_bg2机器人：STATE_ pressed =真正的机器人：state_focused =真
    机器人：state_selected =真正的机器人：state_checked =真/＆GT;
＆LT;项目机器人：可绘制=@可绘制/ list_item_selected_bg2机器人：STATE_ pressed =真/＆GT;



＆LT; /选择器＆GT;
 

解决方案

什么Gmail和类似的应用程序使用的是启动状态，用适当的行布局。参见：

• <一个href="http://stackoverflow.com/questions/5274982/setting-android-background-persistence-menu-bar-using-attribute-on-older-ver">Setting Android的背景和放大器;持久性菜单栏 - 在旧版本使用属性导致崩溃 - 是否有一个主题/模式方法
？
• <一个href="http://stackoverflow.com/questions/6588750/change-colour-of-activated-list-item-background-on-honeycomb">Change激活列表项的背景蜂窝
颜色

简而言之，您：

• 使用一排布置与活化的背景下（例如， android.R.layout.simple_list_item_activated_1 ）
• 使用 setChoiceMode（ListView.CHOICE_MODE_SINGLE）在的ListView
• 在检查，应该用被激活的行 setItemChecked（）在的ListView 启用启动状态，并且有持续的亮点

As seen in the tablet version of gmail and google talk I am trying to show the current selection in a listview. I know this is not standard practice and should be avoided when necessary.in my program the listview is alway on the screen and the item clicked shows a new fragment to the right (similar to gmail and google talk).

To avoid the user from guessing what item has been selected I would like to show the current selection, I tried creating a selector but after it is clicked it changes back to the normal background.

how can I achieve this?

this is my selector xml

<selector xmlns:android="http://schemas.android.com/apk/res/android" >
<item android:drawable="@drawable/list_item_bg2" android:state_pressed="false" android:state_selected="false"
    android:state_focused="false"/>
<item android:drawable="@drawable/list_item_selected_bg2" android:state_pressed="true"/>
<item android:drawable="@drawable/list_item_selected_bg2" android:state_pressed="false" android:state_focused="false"
    android:state_selected="true" android:state_checked="false"/>
<item android:drawable="@drawable/list_item_selected_bg2" android:state_pressed="false" android:state_focused="true"
    android:state_selected="false"/>
<item android:drawable="@drawable/list_item_selected_bg2" android:state_pressed="false" android:state_focused="false"
    android:state_selected="false" android:state_checked="true"/>
<item android:drawable="@drawable/list_item_selected_bg2" android:state_pressed="true" android:state_focused="true"
    android:state_selected="true" android:state_checked="true"/>
<item android:drawable="@drawable/list_item_selected_bg2" android:state_pressed="true"/>



</selector> 

解决方案

What Gmail and similar apps use is the activated state, with an appropriate row layout. See:

• Setting Android Background & Persistence Menu Bar - Using attribute on older versions causes crash - Is there a theme /pattern approach?
• Change colour of activated list item background on Honeycomb

In a nutshell, you:

• Use a row layout with an activated background (e.g., android.R.layout.simple_list_item_activated_1)
• Use setChoiceMode(ListView.CHOICE_MODE_SINGLE) on your ListView
• "Check" the row that should be activated using setItemChecked() on your ListView to enable the "activated" state and have the persistent highlight

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