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POAndroid support-v7-appcompat issue with 4.0 & above
 

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  1. POAndroid support-v7-appcompat issue with 4.0 & above
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    <p>I am backporting my Android application to support older devices (2.3.3+). Previously, it was 4.0+.</p> <p>I am using ActionBar and doing custom styling on it in code in the base class. After conversion to Support ActionBar, the styling code is:</p> <pre><code>public static void styleActionBar(final ActionBarActivity activity) { /* Setup the actionbar as required */ final ActionBar actionBar = activity.getSupportActionBar(); if (actionBar != null) { actionBar.setBackgroundDrawable(new ColorDrawable(0xfffffff)); actionBar.setDisplayOptions(ActionBar.DISPLAY_SHOW_CUSTOM); actionBar.setCustomView(R.layout.customview_actionbar); .... } } </code></pre> <p>After this change, all things work perfectly on 2.3.3. But, for 4.0+, it crashes at the line</p> <pre><code> actionBar.setBackgroundDrawable(new ColorDrawable(0xfffffff)); </code></pre> <p>Also, if I comment this line out, I can see that it crashes at <code>actionBar.setCustomView</code> also.</p> <p>Stack trace on 4.2:</p> <pre><code>.... Caused by: java.lang.NullPointerException at android.support.v7.app.ActionBarImplICS.setBackgroundDrawable(ActionBarImplICS.java:176) at com.mycompany.myproj.ProjBaseActivity.styleActionBar(ProjBaseActivity.java:68) at com.mycompany.myproj.ProjBaseActivity.onCreate(ProjBaseActivity.java:32) at com.mycompany.myproj.TextSearchActivity.onCreate(TextSearchActivity.java:60) at android.app.Activity.performCreate(Activity.java:5008) at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1079) at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2139) </code></pre> <p>It works perfectly in 2.3.3 &amp; it looks to me like an issue in support-v7-appcompat.</p> <p>Any clues / help on overcoming or working around ? Thanks in advance.</p> <p>Edit 1: <code>values-v14/styles.xml</code> content:</p> <pre><code>&lt;resources&gt; &lt;style name="MyTheme" parent="@style/Theme.AppCompat.Light"&gt; &lt;item name="android:actionBarStyle"&gt;@style/MyTheme.ActionBarStyle&lt;/item&gt; &lt;/style&gt; &lt;style name="MyTheme.ActionBarStyle" parent="@style/Widget.AppCompat.Light.ActionBar"&gt; &lt;item name="android:titleTextStyle"&gt;@style/MyTheme.ActionBar.TitleTextStyle&lt;/item&gt; &lt;/style&gt; &lt;style name="MyTheme.ActionBar.TitleTextStyle" parent="@style/TextAppearance.AppCompat.Widget.ActionBar.Title"&gt; &lt;item name="android:textColor"&gt;@color/proj_theme_color&lt;/item&gt; &lt;/style&gt; &lt;/resources&gt; </code></pre>
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    1. USShameem
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      1. POAndroid support-v7-appcompat issue with 4.0 & above
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    2. VO
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    1. COWhen exactly are you calling that method?
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      1. USLuksprog
    2. COin `onCreate()` of the activity just after `super.onCreate()`
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      1. USShameem
    3. COSorry about the previous question, it was obvious from the stacktrace. Do you have different themes per API level(`values-v14` etc)? Some themes don't have an `ActionBar`(like dialog based themes).
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      1. POAndroid support-v7-appcompat issue with 4.0 & above
      1. USLuksprog
 

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