android - You need to use a Theme.AppCompat theme (or descendant) with this activity. Change to Theme.AppCompat causes other error -

i use appcompat v22.1.0 in app , use toolbar. fine when use theme.appcompat.light.noactionbar. when start implement alertdialog, produce error this:

java.lang.illegalstateexception: need use theme.appcompat theme (or descendant) activity.         @ android.support.v7.app.appcompatdelegateimplbase.oncreate(appcompatdelegateimplbase.java:113)         @ android.support.v7.app.appcompatdelegateimplv7.oncreate(appcompatdelegateimplv7.java:146)         @ android.support.v7.app.appcompatdialog.<init>(appcompatdialog.java:47)         @ android.support.v7.app.alertdialog.<init>(alertdialog.java:92)         @ android.support.v7.app.alertdialog$builder.create(alertdialog.java:882)         @ com.ramabmtr.map.findingmoo.mainactivity.onoptionsitemselected(mainactivity.java:216)         @ android.app.activity.onmenuitemselected(activity.java:2572)         @ android.support.v4.app.fragmentactivity.onmenuitemselected(fragmentactivity.java:353)         @ android.support.v7.app.appcompatactivity.onmenuitemselected(appcompatactivity.java:144)         @ android.support.v7.internal.view.windowcallbackwrapper.onmenuitemselected(windowcallbackwrapper.java:99)         @ android.support.v7.internal.view.windowcallbackwrapper.onmenuitemselected(windowcallbackwrapper.java:99)         @ android.support.v7.internal.app.toolbaractionbar$2.onmenuitemclick(toolbaractionbar.java:74)         @ android.support.v7.widget.toolbar$1.onmenuitemclick(toolbar.java:164)         @ android.support.v7.widget.actionmenuview$menubuildercallback.onmenuitemselected(actionmenuview.java:740)         @ android.support.v7.internal.view.menu.menubuilder.dispatchmenuitemselected(menubuilder.java:802)         @ android.support.v7.internal.view.menu.menuitemimpl.invoke(menuitemimpl.java:153)         @ android.support.v7.internal.view.menu.menubuilder.performitemaction(menubuilder.java:949)         @ android.support.v7.internal.view.menu.menubuilder.performitemaction(menubuilder.java:939)         @ android.support.v7.widget.actionmenuview.invokeitem(actionmenuview.java:598)         @ android.support.v7.internal.view.menu.actionmenuitemview.onclick(actionmenuitemview.java:139)         @ android.view.view.performclick(view.java:4084)         @ android.view.view$performclick.run(view.java:16989)         @ android.os.handler.handlecallback(handler.java:615)         @ android.os.handler.dispatchmessage(handler.java:92)         @ android.os.looper.loop(looper.java:137)         @ android.app.activitythread.main(activitythread.java:4812)         @ java.lang.reflect.method.invokenative(native method)         @ java.lang.reflect.method.invoke(method.java:511)         @ com.android.internal.os.zygoteinit$methodandargscaller.run(zygoteinit.java:792)         @ com.android.internal.os.zygoteinit.main(zygoteinit.java:559)         @ dalvik.system.nativestart.main(native method) 

based on error, change theme theme.appcompat , put this:

<item name="windowactionbar">false</item> <item name="windownotitle">true</item> 

to theme. produce same error.

style.xml (old)

<resources> <style name="apptheme" parent="theme.appcompat.light.noactionbar">     <item name="colorprimary">@color/colorprimary</item>     <item name="colorprimarydark">@color/colorprimarydark</item> </style> </resources> 

style.xml (new)

<resources> <style name="apptheme" parent="theme.appcompat">     <item name="windowactionbar">false</item>     <item name="windownotitle">true</item>     <item name="colorprimary">@color/colorprimary</item>     <item name="colorprimarydark">@color/colorprimarydark</item> </style> </resources> 

anyone knows how fix it??

mainactivity.java

package com.ramabmtr.map.findingmoo;  import android.content.dialoginterface; import android.graphics.typeface; import android.os.bundle; import android.support.v4.widget.drawerlayout; import android.support.v7.app.actionbardrawertoggle; import android.support.v7.app.alertdialog; import android.support.v7.app.appcompatactivity; import android.support.v7.widget.recyclerview; import android.support.v7.widget.toolbar; import android.view.view; import android.widget.textview; import android.widget.toast;  public class mainactivity extends appcompatactivity {  private toolbar toolbar; private textview toolbartitle;  @override protected void oncreate(bundle savedinstancestate) {     super.oncreate(savedinstancestate);     setcontentview(r.layout.activity_main);      toolbar = (toolbar) findviewbyid(r.id.toolbar);     setsupportactionbar(toolbar);     getsupportactionbar().setdisplayshowtitleenabled(false);      typeface mytypeface = typeface.createfromasset(getassets(), "fonts/panpizza.ttf");     toolbartitle = (textview) findviewbyid(r.id.toolbar_title);     toolbartitle.settypeface(mytypeface);      alertdialog.builder builder = new alertdialog.builder(getapplicationcontext());     builder.settitle(r.string.filter_title);     builder.setmessage("test");     builder.setpositivebutton(r.string.ok_button, new dialoginterface.onclicklistener() {         @override         public void onclick(dialoginterface dialog, int id) {             dialog.dismiss();         }     });     builder.setnegativebutton(r.string.cancel_button, new dialoginterface.onclicklistener() {         @override         public void onclick(dialoginterface dialog, int id) {             dialog.dismiss();         }     });     alertdialog dialog = builder.create();     dialog.show(); } } 

basically activity using toolbar (which replaces action bar) need use style activity has no action bar theme.appcompat.light.noactionbar. if have own style dialog need inherit proper appcompat theme.

<style name="mydialog" parent="theme.appcompat.dialog">     <item name="android:windownotitle">true</item>     ... </style> 

alertdialog.builder builder = new alertdialog.builder(new contextthemewrapper(this, r.style.mydialog));