如何显示不确定进度在刷新按钮pssed在$ P $ ActionBarSherlock 键，再次显示刷新按钮时的ViewGroup上刷新？

How to show Indeterminate ProgressBar when Refresh button is pressed in ActionBarSherlock and again show Refresh Button when ViewGroup on refreshed?

更新1： 我这里有一个答案是不完整的。我把对问题的赏金，让更多的开发者可以帮助建立一个很好的答案，可以对别人有用的未来。

Update 1: I have a answer here which is incomplete. I am placing a bounty on question so that more developers can help build a good answer which can useful to others in future.

我们如何能表现出不确定进度它看起来像图片中显示如下

How can we show a Indeterminate ProgressBar which looks like the one shown in the image below

推荐答案

这似乎是ActionBarSherlock不提供动画刷新菜单项具体方法。

It seems like ActionBarSherlock doesn't provide specific method to animate a refresh MenuItem.

你可以（通过使用经典的Andr​​oid API）什么是使用 setActionView（INT渣油）方法，并给出了一个布局ID与进度在里面。

What you can do (by using classic android API) is to use the setActionView(int resId) method and give the id of a layout with a ProgressBar in it.

在你的刷新操作的开始就叫：

At the beginning of your refresh action just call :

item.setActionView(R.layout.refresh_menuitem);

当你刷新动作完成的呼叫：

And when your refresh action is finished call :

item.setActionView(null);

下面是一个什么样的布局文件样本的 refresh_menuitem.xml 可以有：

Here is a sample of what your layout file refresh_menuitem.xml can have :

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
              android:layout_width="wrap_content"
              android:layout_height="wrap_content"
              android:addStatesFromChildren="true"
              android:focusable="true"
              android:paddingLeft="4dp"
              android:paddingRight="4dp"
              android:gravity="center"
              style="?attr/actionButtonStyle">
    <ProgressBar
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:focusable="true"
            style="@android:style/Widget.ProgressBar.Small"/>
</LinearLayout>