how can add list items in navigationview, need 1 list items hiden in navigationview user can clik in item when click, list show items below item clicked, how next example:
you can in this example. added code here have full example.
first of need add custom adapter:
public class customexpandablelistadapter extends baseexpandablelistadapter { private context mcontext; private list<string> mexpandablelisttitle; private map<string, list<string>> mexpandablelistdetail; private layoutinflater mlayoutinflater; public customexpandablelistadapter(context context, list<string> expandablelisttitle, map<string, list<string>> expandablelistdetail) { mcontext = context; mexpandablelisttitle = expandablelisttitle; mexpandablelistdetail = expandablelistdetail; mlayoutinflater = (layoutinflater) mcontext.getsystemservice(context.layout_inflater_service); } @override public object getchild(int listposition, int expandedlistposition) { return mexpandablelistdetail.get(mexpandablelisttitle.get(listposition)) .get(expandedlistposition); } @override public long getchildid(int listposition, int expandedlistposition) { return expandedlistposition; } @override public view getchildview(int listposition, final int expandedlistposition, boolean islastchild, view convertview, viewgroup parent) { final string expandedlisttext = (string) getchild(listposition, expandedlistposition); if (convertview == null) { convertview = mlayoutinflater.inflate(r.layout.list_item, null); } textview expandedlisttextview = (textview) convertview .findviewbyid(r.id.expandedlistitem); expandedlisttextview.settext(expandedlisttext); return convertview; } @override public int getchildrencount(int listposition) { return mexpandablelistdetail.get(mexpandablelisttitle.get(listposition)) .size(); } @override public object getgroup(int listposition) { return mexpandablelisttitle.get(listposition); } @override public int getgroupcount() { return mexpandablelisttitle.size(); } @override public long getgroupid(int listposition) { return listposition; } @override public view getgroupview(int listposition, boolean isexpanded, view convertview, viewgroup parent) { string listtitle = (string) getgroup(listposition); if (convertview == null) { convertview = mlayoutinflater.inflate(r.layout.list_group, null); } textview listtitletextview = (textview) convertview .findviewbyid(r.id.listtitle); listtitletextview.settypeface(null, typeface.bold); listtitletextview.settext(listtitle); return convertview; } @override public boolean hasstableids() { return false; } @override public boolean ischildselectable(int listposition, int expandedlistposition) { return true; } } then can add source list:
public class expandablelistdatasource { /** * returns fake data of films * * @param context * @return */ public static map<string, list<string>> getdata(context context) { map<string, list<string>> expandablelistdata = new treemap<>(); list<string> filmgenres = arrays.aslist(context.getresources().getstringarray(r.array.film_genre)); list<string> actionfilms = arrays.aslist(context.getresources().getstringarray(r.array.actionfilms)); list<string> musicalfilms = arrays.aslist(context.getresources().getstringarray(r.array.musicals)); list<string> dramafilms = arrays.aslist(context.getresources().getstringarray(r.array.dramas)); list<string> thrillerfilms = arrays.aslist(context.getresources().getstringarray(r.array.thrillers)); list<string> comedyfilms = arrays.aslist(context.getresources().getstringarray(r.array.comedies)); expandablelistdata.put(filmgenres.get(0), actionfilms); expandablelistdata.put(filmgenres.get(1), musicalfilms); expandablelistdata.put(filmgenres.get(2), dramafilms); expandablelistdata.put(filmgenres.get(3), thrillerfilms); expandablelistdata.put(filmgenres.get(4), comedyfilms); return expandablelistdata; } } it takes data string.xml:
<resources> <string name="app_name">expandablenavigationdrawer</string> <string name="action_settings">settings</string> <string name="drawer_open">open navigation drawer</string> <string name="drawer_close">close navigation drawer</string> <string name="film_genres">film genres</string> <string name="website">https://en.wikipedia.org/wiki/film</string> <string name="date">22 oct 2015</string> <string name="selected_item">selected item</string> <string-array name="film_genre"> <item>action</item> <item>musical</item> <item>drama</item> <item>thriller</item> <item>comedy</item> </string-array> <string-array name="actionfilms"> <item>dr. no (1962)</item> <item>goldfinger (1964)</item> <item>thunderball (1965)</item> <item>live , let die (1973)</item> <item>moonraker (1979)</item> <item>for eyes (1981)</item> <item>octopussy (1983)</item> <item>a view kill (1985)</item> <item>licence kill (1989)</item> <item>goldeneye (1995)</item> </string-array> <string-array name="musicals"> <item>naughty marietta (1935)</item> <item>rose marie (1936)</item> <item>maytime (1937)</item> <item>sweethearts (1938)</item> <item>bitter sweet (1940)</item> <item>new moon (1940)</item> <item>i married angel (1942)</item> <item>lady (1941)</item> <item>ship ahoy (1942)</item> <item>sensations of 1945 (1944)</item> </string-array> <string-array name="dramas"> <item>home of brave (1949)</item> <item>the accused (1949)</item> <item>12 angry men (1957)</item> <item>compulsion (1959)</item> <item>inherit wind (1960)</item> <item>to kill mockingbird (1962)</item> <item>mrs. miniver (1942)</item> <item>since went away (1944)</item> <item>the champ (1931)</item> <item>nashville (1975)</item> </string-array> <string-array name="thrillers"> <item>alien (1979)</item> <item>the french connection (1971)</item> <item>high noon (1952)</item> <item>double indemnity (1944)</item> <item>safety last (1923)</item> <item>the lady shanghai (1948)</item> <item>the third man (1949)</item> <item>rear window (1954)</item> <item>the 39 steps (1935)</item> <item>shadow of doubt (1943)</item> </string-array> <string-array name="comedies"> <item>safety last (1923)</item> <item>duck soup (1933)</item> <item>cat ballou (1965)</item> <item>what\'s up, tiger lily? (1966)</item> <item>blazing saddles (1974)</item> <item>play again, sam (1972)</item> <item>the cheap detective (1978)</item> <item>the naked gun (1988)</item> <item>the freshman (1990)</item> <item>waiting guffman (1996) </item> </string-array> </resources> and can add mainactivity:
public class mainactivity extends actionbaractivity { private drawerlayout mdrawerlayout; private actionbardrawertoggle mdrawertoggle; private string mactivitytitle; private expandablelistview mexpandablelistview; private expandablelistadapter mexpandablelistadapter; private list<string> mexpandablelisttitle; private map<string, list<string>> mexpandablelistdata; private textview mselecteditemview; @override protected void oncreate(bundle savedinstancestate) { super.oncreate(savedinstancestate); setcontentview(r.layout.activity_main); mdrawerlayout = (drawerlayout) findviewbyid(r.id.drawer_layout); mactivitytitle = gettitle().tostring(); mexpandablelistview = (expandablelistview) findviewbyid(r.id.navlist); mselecteditemview = (textview) findviewbyid(r.id.selected_item); layoutinflater inflater = getlayoutinflater(); view listheaderview = inflater.inflate(r.layout.nav_header, null, false); mexpandablelistview.addheaderview(listheaderview); mexpandablelistdata = expandablelistdatasource.getdata(this); mexpandablelisttitle = new arraylist(mexpandablelistdata.keyset()); adddraweritems(); setupdrawer(); getsupportactionbar().setdisplayhomeasupenabled(true); getsupportactionbar().sethomebuttonenabled(true); } private void adddraweritems() { mexpandablelistadapter = new customexpandablelistadapter(this, mexpandablelisttitle, mexpandablelistdata); mexpandablelistview.setadapter(mexpandablelistadapter); mexpandablelistview.setongroupexpandlistener(new expandablelistview.ongroupexpandlistener() { @override public void ongroupexpand(int groupposition) { getsupportactionbar().settitle(mexpandablelisttitle.get(groupposition).tostring()); mselecteditemview.settext(mexpandablelisttitle.get(groupposition).tostring()); } }); mexpandablelistview.setongroupcollapselistener(new expandablelistview.ongroupcollapselistener() { @override public void ongroupcollapse(int groupposition) { getsupportactionbar().settitle(r.string.film_genres); mselecteditemview.settext(r.string.selected_item); } }); mexpandablelistview.setonchildclicklistener(new expandablelistview.onchildclicklistener() { @override public boolean onchildclick(expandablelistview parent, view v, int groupposition, int childposition, long id) { string selecteditem = ((list) (mexpandablelistdata.get(mexpandablelisttitle.get(groupposition)))) .get(childposition).tostring(); getsupportactionbar().settitle(selecteditem); mselecteditemview.settext(mexpandablelisttitle.get(groupposition).tostring() + " -> " + selecteditem); mdrawerlayout.closedrawer(gravitycompat.start); return false; } }); } private void setupdrawer() { mdrawertoggle = new actionbardrawertoggle(this, mdrawerlayout, r.string.drawer_open, r.string.drawer_close) { /** called when drawer has settled in open state. */ public void ondraweropened(view drawerview) { super.ondraweropened(drawerview); getsupportactionbar().settitle(r.string.film_genres); invalidateoptionsmenu(); // creates call onprepareoptionsmenu() } /** called when drawer has settled in closed state. */ public void ondrawerclosed(view view) { super.ondrawerclosed(view); getsupportactionbar().settitle(mactivitytitle); invalidateoptionsmenu(); // creates call onprepareoptionsmenu() } }; mdrawertoggle.setdrawerindicatorenabled(true); mdrawerlayout.setdrawerlistener(mdrawertoggle); } @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); mdrawertoggle.onconfigurationchanged(newconfig); } @override public boolean oncreateoptionsmenu(menu menu) { // inflate menu; adds items action bar if present. getmenuinflater().inflate(r.menu.menu_main, menu); 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(); //noinspection simplifiableifstatement if (id == r.id.action_settings) { return true; } // activate navigation drawer toggle if (mdrawertoggle.onoptionsitemselected(item)) { return true; } return super.onoptionsitemselected(item); } } you can try different approach: using 3rd party library called material drawer. in documentation , code can read how achieve collapsable menu. can refer sample app available in google play store well.
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