ActionBarSherlock: changing homeAsUpIndicator does

问题:

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>

回答1:

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.

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Edit: Updated answer after Jake's comment.