我想建立一个平板电脑优化的应用程序，我想跟随Gmail的平板版本中选择相同的风格（右侧的选择的箭头）。我不知道如何获得相同的风格。有阴影和箭头的选择

I am trying to build a tablet optimized app and I would like to follow the same style of gmail tablet version in selections (the arrow on the right side of the selection). I don't know how to obtain the same style. There is a shadow and an arrow for the selection.

这是Gmail应用程序图像：

This is an image of gmail app:

感谢

推荐答案

箭头是列表项的背景的一部分。

The arrow is just part of the list item background.

下面是和例如，从电子邮件应用程序，其中list_selected_holo是包含在其右侧的箭头被拉伸（您可以用简单的谷歌搜索被拉伸）。

Here is and example from the Email application where list_selected_holo is a drawable that contains an arrow on its right side (You can find the drawable with simple google search).

<selector xmlns:android="http://schemas.android.com/apk/res/android">
    <item android:state_pressed="true"
          android:drawable="@drawable/list_pressed_holo" />
    <item android:state_focused="true"
          android:drawable="@drawable/list_focused_holo" />
    <item android:state_selected="true"
          android:drawable="@drawable/list_selected_holo" />
    <item android:drawable="@drawable/list_read_holo" />
</selector>

我建议在看开源电子邮件应用程序，它目前的股票风格的Gmail应用程序。裁判： https://github.com/android/platform_packages_apps_email 请注意，它需要从外部路径的一些资源，我找不到在github（框架的/ opt / mailcommon / RES）。

I would suggest looking at the open source Email application which now shares style with the Gmail application. ref: https://github.com/android/platform_packages_apps_email Note that it takes some resources from external path which I couldn't find on github (frameworks/opt/mailcommon/res).