Android ActionBar 返回為NULL

標籤：

AndroidBar返回為NULL。是因為values-v11和values-v14下面的style的主題的設定的原因。

在SDK 11的裝置上，會使用第二處，SDK 14會使用第三處。

只需要將三個地方的主題分別設定就可以，結構如下：

values--------

<resources>

    <!--
        Base application theme, dependent on API level. This theme is replaced
        by AppBaseTheme from res/values-vXX/styles.xml on newer devices.
    -->
    <style name="AppBaseTheme" parent="Theme.AppCompat.Light">
        <!--
            Theme customizations available in newer API levels can go in
            res/values-vXX/styles.xml, while customizations related to
            backward-compatibility can go here.
        -->
    </style>

    <!-- Application theme. -->
    <style name="AppTheme" parent="AppBaseTheme">
        <!-- All customizations that are NOT specific to a particular API-level can go here. -->
    </style>

</resources>

 

values-v11--------

 

<resources>    <!--        Base application theme for API 11+. This theme completely replaces        AppBaseTheme from BOTH res/values/styles.xml and        res/values-v11/styles.xml on API 14+ devices.    -->    <style name="AppBaseTheme" parent="android:Theme.Holo.Light">        <!-- API 14 theme customizations can go here. -->        <item name="android:actionBarStyle">@style/my_actionbar_style</item>    </style>    <style name="my_actionbar_style" parent="@android:style/Widget.Holo.Light.ActionBar">        <item name="android:background">#ff8c00</item>        <item name="android:titleTextStyle">@style/AcBar_titleStyle</item>        <item name="android:displayOptions">showTitle</item>    </style>    <style name="AcBar_titleStyle">        <item name="android:textColor">#FFFFFF</item>        <item name="android:textSize">20sp</item>    </style>    <style name="AppTheme" parent="AppBaseTheme"></style></resources>

 

values-v14--------

<resources xmlns:android="http://schemas.android.com/apk/res/android">    <!--        Base application theme for API 14+. This theme completely replaces        AppBaseTheme from BOTH res/values/styles.xml and        res/values-v11/styles.xml on API 14+ devices.    -->    <style name="AppBaseTheme" parent="android:Theme.Holo.Light.DarkActionBar">        <!-- API 14 theme customizations can go here. -->        <item name="android:actionBarStyle">@style/my_actionbar_style</item>     </style>    <style name="my_actionbar_style" parent="@android:style/Widget.Holo.Light.ActionBar">          <item name="android:background">#ff8c00</item>          <item name="android:titleTextStyle">@style/AcBar_titleStyle</item>         <item name="android:displayOptions">showTitle</item>    </style>    <style name="AcBar_titleStyle">            <item name="android:textColor">#FFFFFF</item>        <item name="android:textSize">20sp</item>      </style>    <style name="AppTheme" parent="AppBaseTheme"></style></resources>

 

主要注意紅色部分

Android ActionBar 返回為NULL