在列表视图中显示当前选择 [英] Showing the current selection in a listview

问题描述

正如在平板电脑版的 gmail 和 google talk 中看到的那样，我试图在列表视图中显示当前选择.我知道这不是标准做法，必要时应该避免.在我的程序中，列表视图始终在屏幕上，单击的项目在右侧显示一个新片段(类似于 gmail 和 google talk).

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).

为了避免用户猜测已选择的项目，我想显示当前选择，我尝试创建一个选择器，但在单击它后它会变回正常背景.

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.

我怎样才能做到这一点?

how can I achieve this?

这是我的选择器 xml

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> 

推荐答案

Gmail 和类似应用使用的是 activated 状态，具有适当的行布局.见:

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

• 设置 Android 背景 &持久性菜单栏 - 在旧版本上使用属性会导致崩溃 - 是否有主题/模式方法?
• 更改蜂窝上已激活列表项背景的颜色

简而言之，您:

• 使用带有激活背景的行布局(例如，android.R.layout.simple_list_item_activated_1)
• 在您的 ListView
上使用 setChoiceMode(ListView.CHOICE_MODE_SINGLE)
• 检查"应使用 ListView 上的 setItemChecked() 激活的行以启用激活"状态并具有持久突出显示

• 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

这篇关于在列表视图中显示当前选择的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！