android - Null Pointer in SearchView AppCompatActivity? -

i beginner , searched question here found 4-5 question did not helped me.i trying searchview in actionbar, activity appcompatactivity code below.i using toolbar in activity. , using library too. oncreatoptionmenu:

 @override public boolean oncreateoptionsmenu(menu menu) {      menuinflater inflater = getmenuinflater();     inflater.inflate(r.menu.menu_main, menu);     searchmanager smanager =  (searchmanager) getsystemservice(context.search_service);     menuitem searchmenuitem = menu.finditem(r.id.action_search);     searchview searchviewaction = (searchview) menuitemcompat.getactionview(searchmenuitem);     searchviewaction.setsearchableinfo(smanager.getsearchableinfo(getcomponentname()));     searchviewaction.seticonifiedbydefault(false);      return super.oncreateoptionsmenu(menu); } 

xml:

<item android:id="@+id/action_search"     android:title="action_search"     mainactivity:showasaction="ifroom"     mainactivity:actionviewclass="android.support.v7.widget.searchview" /> 

and logcat:

java.lang.nullpointerexception         @ algonation.com.spm.mainactivity.oncreateoptionsmenu(mainactivity.java:183)         @ android.app.activity.oncreatepanelmenu(activity.java:2571)         @ android.support.v4.app.fragmentactivity.oncreatepanelmenu(fragmentactivity.java:277)         @ android.support.v7.internal.view.windowcallbackwrapper.oncreatepanelmenu(windowcallbackwrapper.java:84)         @ android.support.v7.app.appcompatdelegateimplbase$appcompatwindowcallback.oncreatepanelmenu(appcompatdelegateimplbase.java:251)         @ android.support.v7.internal.view.windowcallbackwrapper.oncreatepanelmenu(windowcallbackwrapper.java:84)         @ android.support.v7.internal.app.toolbaractionbar.populateoptionsmenu(toolbaractionbar.java:449)         @ android.support.v7.internal.app.toolbaractionbar$1.run(toolbaractionbar.java:66)         @ android.os.handler.handlecallback(handler.java:808)         @ android.os.handler.dispatchmessage(handler.java:103)         @ android.os.looper.loop(looper.java:193)         @ android.app.activitythread.main(activitythread.java:5292)         @ java.lang.reflect.method.invokenative(native method)         @ java.lang.reflect.method.invoke(method.java:515)         @ com.android.internal.os.zygoteinit$methodandargscaller.run(zygoteinit.java:824)         @ com.android.internal.os.zygoteinit.main(zygoteinit.java:640)         @ dalvik.system.nativestart.main(native method) 

if need whole code of mainactivity please let me know.. thank much.

you getting nullpointerexception because below line returning null.

smanager.getsearchableinfo(getcomponentname()

you need

1 - declare activity(which needs perform search) accept action_search intent, in <intent-filter> element.

2 - specify searchable configuration use, in <meta-data> element.

assuming performing search in mainactivity (which appcompatactivity want) see below example:

public class mainactivity extends appcompatactivity {  @override protected void oncreate(bundle savedinstancestate) {     super.oncreate(savedinstancestate);     setcontentview(r.layout.activity_my_main); }   @override public boolean oncreateoptionsmenu(menu menu) {     // inflate menu; adds items action bar if present.     getmenuinflater().inflate(r.menu.my_main, menu);      menuitem searchmenuitem = menu.finditem(r.id.action_search);     searchview searchviewaction = (searchview) menuitemcompat             .getactionview(searchmenuitem);      // searchview , set searchable configuration     searchmanager searchmanager = (searchmanager) getsystemservice(context.search_service);     searchableinfo searchableinfo = searchmanager              .getsearchableinfo(getcomponentname());     searchviewaction.setsearchableinfo(searchableinfo);     searchviewaction.seticonifiedbydefault(false);      return true;  }  @override public boolean onoptionsitemselected(menuitem item) {     // handle action bar item clicks here. action bar     // automatically handle clicks on home/up button, long     // specify parent activity in androidmanifest.xml.     int id = item.getitemid();     if (id == r.id.action_settings) {         return true;     }     return super.onoptionsitemselected(item); } } 

androidmanifest.xml

 <application     android:allowbackup="true"     android:icon="@drawable/ic_launcher"     android:label="@string/app_name"     android:theme="@style/apptheme" >     <activity         android:name=".mainactivity"         android:label="@string/app_name" >         <intent-filter>             <action android:name="android.intent.action.main" />              <category android:name="android.intent.category.launcher" />         </intent-filter>            <intent-filter>              <action android:name="android.intent.action.search" />           </intent-filter>            <meta-data                android:name="android.app.searchable"                android:resource="@xml/searchable" />      </activity>  </application> 

menu/activity_main.xml

<item     android:id="@+id/action_search"     app:actionviewclass="android.support.v7.widget.searchview"     app:showasaction="ifroom"     android:title="@string/action_search"/> 

res/xml/searchable.xml

<?xml version="1.0" encoding="utf-8"?> <searchable xmlns:android="http://schemas.android.com/apk/res/android"     android:label="@string/app_label"     android:hint="@string/search_hint" > </searchable> 

hope solve problem & reference see here.