android - Add section to navigation drawer -

i have below code :

activity.xml

<android.support.v4.widget.drawerlayout xmlns:android="http://schemas.android.com/apk/res/android"     android:id="@+id/drawer_layout"     android:layout_width="match_parent"     android:layout_height="match_parent" >      <!-- framelayout display fragments -->      <framelayout         android:id="@+id/frame_container"         android:layout_width="match_parent"         android:layout_height="match_parent" />     <!-- listview display slider menu -->      <listview         android:id="@+id/list_slidermenu"         android:layout_width="240dp"         android:layout_height="match_parent"         android:layout_gravity="start"         android:background="@color/list_background"         android:choicemode="singlechoice"         android:divider="@color/list_divider"         android:dividerheight="1dp"         android:listselector="@drawable/list_selector" />  </android.support.v4.widget.drawerlayout> 

mainactivity.java

public class mainactivity extends activity {     private drawerlayout mdrawerlayout;     private listview mdrawerlist;     private actionbardrawertoggle mdrawertoggle;      // nav drawer title     private charsequence mdrawertitle;      // used store app title     private charsequence mtitle;      // slide menu items     private string[] navmenutitles;     private typedarray navmenuicons;      private arraylist<navdraweritem> navdraweritems;     private navdrawerlistadapter adapter;      @override     protected void oncreate(bundle savedinstancestate) {         super.oncreate(savedinstancestate);         setcontentview(r.layout.activity_main);          mtitle = mdrawertitle = gettitle();          // load slide menu items         navmenutitles = getresources().getstringarray(r.array.nav_drawer_items);          // nav drawer icons resources         navmenuicons = getresources()                 .obtaintypedarray(r.array.nav_drawer_icons);          mdrawerlayout = (drawerlayout) findviewbyid(r.id.drawer_layout);         mdrawerlist = (listview) findviewbyid(r.id.list_slidermenu);          navdraweritems = new arraylist<navdraweritem>();          // adding nav drawer items array         // home         navdraweritems.add(new navdraweritem(navmenutitles[0], navmenuicons                 .getresourceid(0, -1)));         // find people         navdraweritems.add(new navdraweritem(navmenutitles[1], navmenuicons                 .getresourceid(1, -1)));         // photos         navdraweritems.add(new navdraweritem(navmenutitles[2], navmenuicons                 .getresourceid(2, -1)));         // communities, add counter here         navdraweritems.add(new navdraweritem(navmenutitles[3], navmenuicons                 .getresourceid(3, -1), true, "22"));         // pages         navdraweritems.add(new navdraweritem(navmenutitles[4], navmenuicons                 .getresourceid(4, -1)));         // what's hot, add counter here         navdraweritems.add(new navdraweritem(navmenutitles[5], navmenuicons                 .getresourceid(5, -1), true, "50+"));          // recycle typed array         navmenuicons.recycle();          mdrawerlist.setonitemclicklistener(new slidemenuclicklistener());          // setting nav drawer list adapter         adapter = new navdrawerlistadapter(getapplicationcontext(),                 navdraweritems);         mdrawerlist.setadapter(adapter);          // enabling action bar app icon , behaving toggle button         getactionbar().setdisplayhomeasupenabled(true);         getactionbar().sethomebuttonenabled(true);          mdrawertoggle = new actionbardrawertoggle(this, mdrawerlayout,                 r.drawable.ic_drawer, // nav menu toggle icon                 r.string.app_name, // nav drawer open - description                                     // accessibility                 r.string.app_name // nav drawer close - description                                     // accessibility         ) {             public void ondrawerclosed(view view) {                 getactionbar().settitle(mtitle);                 // calling onprepareoptionsmenu() show action bar icons                 invalidateoptionsmenu();             }              public void ondraweropened(view drawerview) {                 getactionbar().settitle(mdrawertitle);                 // calling onprepareoptionsmenu() hide action bar icons                 invalidateoptionsmenu();             }         };         mdrawerlayout.setdrawerlistener(mdrawertoggle);          if (savedinstancestate == null) {             // on first time display view first nav item             displayview(0);         }     }      /**      * slide menu item click listener      * */     private class slidemenuclicklistener implements             listview.onitemclicklistener {         @override         public void onitemclick(adapterview<?> parent, view view, int position,                 long id) {             // display view selected nav drawer item             displayview(position);         }     }      @override     public boolean oncreateoptionsmenu(menu menu) {         getmenuinflater().inflate(r.menu.main, menu);         return true;     }      @override     public boolean onoptionsitemselected(menuitem item) {         // toggle nav drawer on selecting action bar app icon/title         if (mdrawertoggle.onoptionsitemselected(item)) {             return true;         }         // handle action bar actions click         switch (item.getitemid()) {         case r.id.action_settings:             return true;         default:             return super.onoptionsitemselected(item);         }     }      /* *      * called when invalidateoptionsmenu() triggered      */     @override     public boolean onprepareoptionsmenu(menu menu) {         // if nav drawer opened, hide action items         boolean draweropen = mdrawerlayout.isdraweropen(mdrawerlist);         menu.finditem(r.id.action_settings).setvisible(!draweropen);         return super.onprepareoptionsmenu(menu);     }      /**      * diplaying fragment view selected nav drawer list item      * */     private void displayview(int position) {         // update main content replacing fragments         fragment fragment = null;         switch (position) {         case 0:              fragment = new homefragment();             break;          case 1:             fragment = new findpeoplefragment();             break;         case 2:             fragment = new photosfragment();             break;         case 3:             fragment = new communityfragment();             break;         case 4:             fragment = new pagesfragment();             break;         case 5:             fragment = new whatshotfragment();             break;          default:             break;         }          if (fragment != null) {             fragmentmanager fragmentmanager = getfragmentmanager();             fragmentmanager.begintransaction()                     .replace(r.id.frame_container, fragment).commit();              // update selected item , title, close drawer             mdrawerlist.setitemchecked(position, true);             mdrawerlist.setselection(position);             settitle(navmenutitles[position]);             mdrawerlayout.closedrawer(mdrawerlist);         } else {             // error in creating fragment             log.e("mainactivity", "error in creating fragment");         }     }      @override     public void settitle(charsequence title) {         mtitle = title;         getactionbar().settitle(mtitle);     }      /**      * when using actionbardrawertoggle, must call during      * onpostcreate() , onconfigurationchanged()...      */      @override     protected void onpostcreate(bundle savedinstancestate) {         super.onpostcreate(savedinstancestate);         // sync toggle state after onrestoreinstancestate has occurred.         mdrawertoggle.syncstate();     }      @override     public void onconfigurationchanged(configuration newconfig) {         super.onconfigurationchanged(newconfig);         // pass configuration change drawer toggls         mdrawertoggle.onconfigurationchanged(newconfig);     }  } 

and section have below xml :

<?xml version="1.0" encoding="utf-8"?> <relativelayout xmlns:android="http://schemas.android.com/apk/res/android"     android:layout_width="fill_parent"     android:layout_height="wrap_content"     android:background="#fff" >      <textview         android:id="@+id/navmenusection_label"         style="?android:attr/listseparatortextviewstyle"         android:layout_width="fill_parent"         android:layout_height="wrap_content"         android:background="#bbb"         android:paddingbottom="7dp"         android:paddingtop="7dp"         android:text="section"         android:textcolor="#ffffff"         android:textsize="18sp" />  </relativelayout> 

so how can add section in navigation drawer. ? have change navdrawerlistadapter.java file :

public class navdrawerlistadapter extends baseadapter {      private context context;     private arraylist<navdraweritem> navdraweritems;      public navdrawerlistadapter(context context,             arraylist<navdraweritem> navdraweritems) {         this.context = context;         this.navdraweritems = navdraweritems;     }      @override     public int getcount() {         return navdraweritems.size();     }      @override     public object getitem(int position) {         return navdraweritems.get(position);     }      @override     public long getitemid(int position) {         return position;     }      @override     public view getview(int position, view convertview, viewgroup parent) {         if (convertview == null) {             layoutinflater minflater = (layoutinflater) context                     .getsystemservice(activity.layout_inflater_service);             convertview = minflater.inflate(r.layout.drawer_list_item, null);             /*              * convertview = minflater.inflate(r.layout.navdrawer_section,              * parent, false);              */         }          imageview imgicon = (imageview) convertview.findviewbyid(r.id.icon);         textview txttitle = (textview) convertview.findviewbyid(r.id.title);         textview txtcount = (textview) convertview.findviewbyid(r.id.counter);          imgicon.setimageresource(navdraweritems.get(position).geticon());         txttitle.settext(navdraweritems.get(position).gettitle());          // displaying count         // check whether set visible or not         if (navdraweritems.get(position).getcountervisibility()) {             txtcount.settext(navdraweritems.get(position).getcount());         } else {             // hide counter view             txtcount.setvisibility(view.gone);         }          return convertview;     }  } 

convertview = minflater.inflate(r.layout.navdrawer_section, parent, false);

i have put in getview() getting error .

logcat :

 fatal exception: main  process: com.novumlogic.euphoria, pid: 26846  java.lang.nullpointerexception     @ com.novumlogic.euphoria.adapter.navdrawerlistadapter.getview(navdrawerlistadapter.java:59)     @ android.widget.abslistview.obtainview(abslistview.java:2338)     @ android.widget.listview.makeandaddview(listview.java:1812)     @ android.widget.listview.filldown(listview.java:698)     @ android.widget.listview.fillfromtop(listview.java:759)     @ android.widget.listview.layoutchildren(listview.java:1631)     @ android.widget.abslistview.onlayout(abslistview.java:2149)     @ android.view.view.layout(view.java:15125)     @ android.view.viewgroup.layout(viewgroup.java:4862)     @ android.support.v4.widget.drawerlayout.onlayout(drawerlayout.java:702)     @ android.view.view.layout(view.java:15125)     @ android.view.viewgroup.layout(viewgroup.java:4862)     @ android.widget.framelayout.layoutchildren(framelayout.java:515)     @ android.widget.framelayout.onlayout(framelayout.java:450)     @ android.view.view.layout(view.java:15125)     @ android.view.viewgroup.layout(viewgroup.java:4862)     @ com.android.internal.widget.actionbaroverlaylayout.onlayout(actionbaroverlaylayout.java:374)     @ android.view.view.layout(view.java:15125)     @ android.view.viewgroup.layout(viewgroup.java:4862)     @ android.widget.framelayout.layoutchildren(framelayout.java:515)     @ android.widget.framelayout.onlayout(framelayout.java:450)     @ android.view.view.layout(view.java:15125)     @ android.view.viewgroup.layout(viewgroup.java:4862)     @ android.view.viewrootimpl.performlayout(viewrootimpl.java:2317)     @ android.view.viewrootimpl.performtraversals(viewrootimpl.java:2023)     @ android.view.viewrootimpl.dotraversal(viewrootimpl.java:1189)     @ android.view.viewrootimpl$traversalrunnable.run(viewrootimpl.java:6223)     @ android.view.choreographer$callbackrecord.run(choreographer.java:788)     @ android.view.choreographer.docallbacks(choreographer.java:591)     @ android.view.choreographer.doframe(choreographer.java:560)     @ android.view.choreographer$framedisplayeventreceiver.run(choreographer.java:774)     @ android.os.handler.handlecallback(handler.java:808)     @ android.os.handler.dispatchmessage(handler.java:103)     @ android.os.looper.loop(looper.java:193)     @ android.app.activitythread.main(activitythread.java:5333)     @ java.lang.reflect.method.invokenative(native method)     @ java.lang.reflect.method.invoke(method.java:515)     @ com.android.internal.os.zygoteinit$methodandargscaller.run(zygoteinit.java:824)     @ com.android.internal.os.zygoteinit.main(zygoteinit.java:640)     @ dalvik.system.nativestart.main(native method) 

how can add section ?

first remove changes have done causes null pointer exception go drwer_list_item.xml , add text view section part, go navdraweritem.class , add:

private string section; 

change constructor this:

public navdraweritem(string title, int icon,string section){     this.title = title;     this.icon = icon;     this.section= section; } 

you have add getters , setters private section instanse:

public string getsection(){     return this.section; }  public void setsection(string section){     this.section = section; } 

then go navdrewerlistadapter.class , add this:

textview txtsection = (textview) convertview.findviewbyid(r.id.section); 

last thing have change navdraweritems.add this:

navdraweritems.add(new navdraweritem(navmenutitles[index], navmenuicons             .getresourceid(index, -1))); 

to this:

navdraweritems.add(new navdraweritem(navmenutitles[index], navmenuicons             .getresourceid(index, -1),"string section")); 

hope help.