Android的选择为选择项不起作用不起作用、Android

由网友(再叽歪废了你)分享简介:我有一个列表视图,在这里我想强调一个自定义的方式选择的项目。我设置每个项目的属性在适配器的 getView 的方法,包括 itemView.setSelected(真)。I have a listview, where I want to highlight selected items in a custom wa...

我有一个列表视图,在这里我想强调一个自定义的方式选择的项目。我设置每个项目的属性在适配器的 getView 的方法,包括 itemView.setSelected(真)

I have a listview, where I want to highlight selected items in a custom way. I'm setting every item properties in the adapter's getView method, including itemView.setSelected(true).

的主要布局定义列表视图中的方式如下:

The main layout defines the listview in the following way:

<ListView
android:id="@+id/list"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:choiceMode="multipleChoice"
android:listSelector="@drawable/list_selector" />

(与选择模式播放也没有帮助)。

(Playing with choice mode does not help either).

在 list_selector 是一个几乎空存根:

<?xml version="1.0" encoding="utf-8"?>
<selector xmlns:android="http://schemas.android.com/apk/res/android" >
    <item android:drawable="@android:color/transparent" />
</selector>

我不需要特定的样式列表视图作为一个整体,所以我要离开一个默认的,但根据这个答案,我们需要选择一个列表视图的项目选择工作。总之,没有在 list_selector 问题仍然存在。

I don't need specific styles for listview as a whole, so I'd leave a default one, but according to this answer, we need a selector for a listview for item selector to work. Anyway, without the list_selector the problem remains.

在ListView项目布局:

The listview item layout:

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" 
    android:layout_width="fill_parent"
    android:layout_height="wrap_content"
    android:minHeight="?android:attr/listPreferredItemHeight"
    android:background="@drawable/listitem_background"
    android:orientation="vertical">

和它引用下面的 listitem_background 选择:

<?xml version="1.0" encoding="utf-8"?>
<selector xmlns:android="http://schemas.android.com/apk/res/android">
    <item android:state_selected="true" android:drawable="@android:color/white" />
    <item android:drawable="@android:color/transparent" />
</selector>

的问题是,所选择的项目不具有白色背景

The problem is, that selected items do not have white background.

如果我修改安卓state_selected =真正的选择在 listitem_background 即可,例如,机器人: STATE_ pressed =真正的,然后选择开始工作,这是项目的背景变成白色,如果一个项目是感动。

If I change android:state_selected="true" selector in the listitem_background to, for example, android:state_pressed="true", then the selector starts to work, that is item background becomes white if an item is touched.

所以,我认为,有错误或者在选择器,或我怎么选择项目的方式。

So, I suppose, there is an error either in the selectors, or in the way how I select items.

我可以从Java设置背景或利用辨认的状态写入一个解决办法,但我想了解和解决当前的问题与选择。先谢谢了。

I can write a workaround by setting background from Java or utilizing checkable states, but I want to understand and fix current problem with selectors. Thanks in advance.

推荐答案

那么在你的项目视图中添加这一行?

What about adding this line in your item view?

android:background="?android:attr/activatedBackgroundIndicator"

例如:

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="?android:attr/activatedBackgroundIndicator"
android:orientation="vertical" >

<TextView
    android:id="@+id/textViewListRowOption"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:gravity="center_vertical" />
</LinearLayout>

然后选择看起来是这样的:

Then the selector looks something like this:

<selector xmlns:android="http://schemas.android.com/apk/res/android"
android:exitFadeDuration="@android:integer/config_mediumAnimTime">

<item android:drawable="@drawable/list_pressed" android:state_pressed="true"/>
<item android:drawable="@drawable/list_selected" android:state_activated="true"/>
<item android:drawable="@drawable/list_default"/>

</selector>

和列表视图:

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical" >

<ListView
    android:id="@+id/listViewMainFragment"
    android:layout_width="match_parent"
    android:layout_height="wrap_content" 
    android:listSelector="@drawable/list_item_selector"
    android:choiceMode="singleChoice">
</ListView>

</LinearLayout>
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