Getactionbar () NULL pointer exception

There are a lot of solutions online, but not for me, Google a new solution

　　

You can directly specify it in manifest file

1234	< application           android:icon = "@drawable/app_icon" &NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP; android:label = "@string/app_name" &NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP; android:theme = >

There is 3 themes available Theme.holo.light/theme.holo.dark/theme.holo.light.darkactionbar.

Theme.Holo.Light requires API level >=11 and Theme.holo.dark/theme.holo.light.darkactionbar requires API level > = 14

If you want to the change themes according to API level, you can specify a base apptheme, and override it in style files

1234	<application        android:icon="@drawable/app_icon"        android:label="@string/app_name"        android:theme="@style/appTheme">

Values/styles.xml

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<resources>    <!--        Base application theme, dependent on API level.    -->    <style name="AppBaseTheme" parent="android:Theme.Light">       </style>    <style name="AppTheme" parent="AppBaseTheme">           </style></resources>

Values-v14/styles.xml

1234567891011

<resources>    <!--        Base application theme for API 14+. This theme completely replaces        AppBaseTheme    -->    <style name="AppBaseTheme" parent="android:Theme.Holo.Light.DarkActionBar">           </style></resources>

If you want a consistent theme and maintain compatibility with lower API levels, look at what these people is doing op

The second solution is to request ActionBar feature manually instead making the theme does it for you. I am too lazy to try it myself. This link explain it pretty well. Op

Getactionbar () NULL pointer exception