android - How can I call one of my activity using navigation drawer ? -

i have navigation drawer activity mainactivity class , have homepage.class activity made. since navigation drawer uses fragments, unable call homepage class through drawer. plz me.

here code drawer-

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;  @suppresslint("newapi") @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); } 

}

one of fragments -

    public class homefragment extends fragment {  public homefragment(){}  @override public view oncreateview(layoutinflater inflater, viewgroup container,         bundle savedinstancestate) {      intent intent = new intent();     intent.setclass(getactivity(), homepage.class);     startactivity(intent);       view rootview = inflater.inflate(r.layout.activity_main, container, false);        return rootview;      }  

homepage activity want call when item on navigation drawer clicked :

    public class homepage extends mainactivity { private static final string tag = mainactivity.class.getsimplename(); private listview listview; private feedlistadapter listadapter; private list<feeditem> feeditems; private string url_feed = "https://gist.githubusercontent.com/anonymous/e6c3336c57bf40c794ab/raw/022058ac0ceafd15bfed89a72e6b741dd84da130/blob.json";   @override protected void oncreate(bundle savedinstancestate) {     super.oncreate(savedinstancestate);    setcontentview(r.layout.fragment_home);      listview = (listview) findviewbyid(r.id.list);      feeditems = new arraylist<feeditem>();      listadapter = new feedlistadapter(this, feeditems);     listview.setadapter(listadapter);      // these 2 lines not needed,     // of facebook (changing background color & hiding icon)     getactionbar().setbackgrounddrawable(new colordrawable(color.parsecolor("#ef7b00")));   //  getactionbar().seticon(               // new colordrawable(getresources().getcolor(android.r.color.transparent)));      // first check cached request     cache cache = appcontroller.getinstance().getrequestqueue().getcache();     entry entry = cache.get(url_feed);     if (entry != null) {         // fetch data cache         try {             string data = new string(entry.data, "utf-8");             try {                 parsejsonfeed(new jsonobject(data));             } catch (jsonexception e) {                 e.printstacktrace();             }         } catch (unsupportedencodingexception e) {             e.printstacktrace();         }      } else {         // making fresh volley request , getting json         jsonobjectrequest jsonreq = new jsonobjectrequest(method.get,                 url_feed, null, new response.listener<jsonobject>() {                      @override                     public void onresponse(jsonobject response) {                         volleylog.d(tag, "response: " + response.tostring());                         if (response != null) {                             parsejsonfeed(response);                         }                     }                 }, new response.errorlistener() {                      @override                     public void onerrorresponse(volleyerror error) {                         volleylog.d(tag, "error: " + error.getmessage());                     }                 });          // adding request volley request queue         appcontroller.getinstance().addtorequestqueue(jsonreq);     }  }  /**  * parsing json reponse , passing data feed view list adapter  * */ private void parsejsonfeed(jsonobject response) {     try {         jsonarray feedarray = response.getjsonarray("feed");          (int = 0; < feedarray.length(); i++) {             jsonobject feedobj = (jsonobject) feedarray.get(i);              feeditem item = new feeditem();             item.setid(feedobj.getint("id"));             item.setname(feedobj.getstring("name"));              // image might null             string image = feedobj.isnull("image") ? null : feedobj                     .getstring("image");             item.setimge(image);             item.setstatus(feedobj.getstring("status"));             item.setprofilepic(feedobj.getstring("profilepic"));             item.settimestamp(feedobj.getstring("timestamp"));              // url might null             string feedurl = feedobj.isnull("url") ? null : feedobj                     .getstring("url");             item.seturl(feedurl);              feeditems.add(item);         }          // notify data changes list adapater         listadapter.notifydatasetchanged();     } catch (jsonexception e) {         e.printstacktrace();     } }  @override public boolean oncreateoptionsmenu(menu menu) {     getmenuinflater().inflate(r.menu.main, menu);     return true; }      } 

xml drawer:

    <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">      </framelayout>          <!-- 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> 

and xml activity want called -

    <linearlayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="match_parent" android:layout_height="match_parent">  <listview     android:id="@+id/list"     android:layout_width="fill_parent"     android:layout_height="wrap_content"     android:divider="@null" />      </linearlayout> 

the api starting activity not change when using navigation drawer. still need call startactivity() launch different activity.

in case, code this:

private void displayview(int position) {     // update main content replacing fragments     fragment fragment = null;     switch (position) {         case 0: // or whatever nav item position should start activity             startactivity(new intent(this, homepage.class));             return;          // rest of cases } 

note when after calling startactivity() homepage item, return instead of break displayview() doesn't try replace displayed fragment.