ActionBarSherlock: changing homeAsUpIndicator doesn't work

文章摘自stackoverflow上的一个帖子，解决了actionBar上换home图标左侧的“<”不起作用的问题。

原文如下：

Ask：

I'm want to change the up icon with applying the following style to my activity, but it doesn't work and but I still get the default black '<' icon.

Can anyone find out what is missing here?

<style name="AppTheme.ActionBar" parent="@style/Theme.Sherlock.Light">
<item name="actionBarStyle">@style/actionBarStyle</item>
<item name="android:actionBarStyle">@style/actionBarStyle</item>
</style>

<style name="actionBarStyle" parent="@style/Widget.Sherlock.Light.ActionBar.Solid">
<item name="android:background">@drawable/header_bar</item>
<item name="background">@drawable/header_bar</item>

<item name="android:homeAsUpIndicator">@drawable/up_indicator</item>
<item name="homeAsUpIndicator">@drawable/up_indicator</item>
<item name="android:displayOptions">homeAsUp|showHome</item>
<item name="displayOptions">homeAsUp|showHome</item>

</style>

Answer：
If I remember correctly, I
worked around this issue by moving you should move the

android:homeAsUpIndicator

and

homeAsUpIndicator

elements
into the main theme declaration. In other words, try:

<style name="AppTheme.ActionBar" parent="@style/Theme.Sherlock.Light">
<item name="actionBarStyle">@style/actionBarStyle</item>
<item name="android:actionBarStyle">@style/actionBarStyle</item>
<item name="android:homeAsUpIndicator">@drawable/up_indicator</item>
<item name="homeAsUpIndicator">@drawable/up_indicator</item>
</style>

<style name="actionBarStyle" parent="@style/Widget.Sherlock.Light.ActionBar.Solid">
<item name="android:background">@drawable/header_bar</item>
<item name="background">@drawable/header_bar</item>
<item name="android:displayOptions">homeAsUp|showHome</item>
<item name="displayOptions">homeAsUp|showHome</item>
</style>

Not sure whether I also had to move up the

displayOptions

,
but you may want to give that a go too in case above doesn't work right away.

By the way, I find naming a style

AppTheme.ActionBar

and
then inheriting from

Theme.Sherlock.Light

rather
confusing. If it were an ActionBar specific style, I would've expected something like

Widget.Holo.Light.ActionBar

(or
any of the other widget styles) as the parent. If it's your main theme, I'd name it accordingly. Up to you of course.