getSupportActionBar returns null in android 4.1 and above -
getsupportactionbar returns null in android 4.1 , above. using support v4 , sherlockfragmentactivity.
this logcat.
03-10 11:35:47.876: e/crittercism(4778): java.lang.runtimeexception: unable start activity componentinfo{com.cx.android/com.cx.android.ui.homeactivity}: java.lang.nullpointerexception 03-10 11:35:47.876: e/crittercism(4778): @ android.app.activitythread.performlaunchactivity(activitythread.java:2245) 03-10 11:35:47.876: e/crittercism(4778): @ android.app.activitythread.handlelaunchactivity(activitythread.java:2299) 03-10 11:35:47.876: e/crittercism(4778): @ android.app.activitythread.access$700(activitythread.java:150) 03-10 11:35:47.876: e/crittercism(4778): @ android.app.activitythread$h.handlemessage(activitythread.java:1280) 03-10 11:35:47.876: e/crittercism(4778): @ android.os.handler.dispatchmessage(handler.java:99) 03-10 11:35:47.876: e/crittercism(4778): @ android.os.looper.loop(looper.java:137) 03-10 11:35:47.876: e/crittercism(4778): @ android.app.activitythread.main(activitythread.java:5283) 03-10 11:35:47.876: e/crittercism(4778): @ java.lang.reflect.method.invokenative(native method) 03-10 11:35:47.876: e/crittercism(4778): @ java.lang.reflect.method.invoke(method.java:511) 03-10 11:35:47.876: e/crittercism(4778): @ com.android.internal.os.zygoteinit$methodandargscaller.run(zygoteinit.java:1102) 03-10 11:35:47.876: e/crittercism(4778): @ com.android.internal.os.zygoteinit.main(zygoteinit.java:869) 03-10 11:35:47.876: e/crittercism(4778): @ dalvik.system.nativestart.main(native method) 03-10 11:35:47.876: e/crittercism(4778): caused by: java.lang.nullpointerexception 03-10 11:35:47.876: e/crittercism(4778): @ com.cx.android.ui.homeactivity.oncreate(homeactivity.java:71) 03-10 11:35:47.876: e/crittercism(4778): @ android.app.activity.performcreate(activity.java:5283) 03-10 11:35:47.876: e/crittercism(4778): @ android.app.instrumentation.callactivityoncreate(instrumentation.java:1097) 03-10 11:35:47.876: e/crittercism(4778): @ android.app.activitythread.performlaunchactivity(activitythread.java:2209) 03-10 11:35:47.876: e/crittercism(4778): ... 11 more this edit. class returns npe.
public class homeactivity extends sherlockfragmentactivity implements onnavigationlistener { public static final string tag = "homeactivity"; private homedropdownlistadapter homeadapter; private fragmentmanager fragmentmanager; private dashboardfragment dashboard; private actionbar actionbar; private static homeactivity staticinstance; @override protected void oncreate(bundle savedinstancestate) { super.oncreate(savedinstancestate); setcontentview(r.layout.view_main); staticinstance = this; fragmentmanager = getsupportfragmentmanager(); navstack = new stack<long>(); // action bar actionbar = homeactivity.this.getsupportactionbar(); actionbar.setdisplayshowhomeenabled(false); //actionbar.setdisplayoptions(10); actionbar.setdisplayshowtitleenabled(false); actionbar.setnavigationmode(actionbar.navigation_mode_list); homeadapter = new homedropdownlistadapter(this); actionbar.setlistnavigationcallbacks(homeadapter, this); actionbar.setselectednavigationitem(app.starting_nav_index); edit 2: added manifest theme: called application tag's theme:
<style name="theme.maintheme" parent="@style/theme.sherlock"> <item name="actionbarstyle">@style/widget.styled.actionbar</item> <item name="android:actionbarstyle">@style/widget.styled.actionbar</item> <item name="android:windowbackground">@color/background</item> <item name="actionbarsize">54dp</item> <item name="android:actionbarsize">54dp</item> </style> <style name="widget.styled.actionbar" parent="widget.sherlock.actionbar.solid"> <item name="background">@drawable/actionbar_background</item> <item name="android:background">@drawable/actionbar_background</item> </style> <style name="theme.dialog" parent="@android:style/theme.dialog"> <item name ="android:windowactionbar">false</item> </style>
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