android - Context menu does not show in long click even of listview -


i have listview. want show context menu when press long click in item. , context menu show "delete" , "edit". implemented below code. however, not show context menu when press long click item. note that, long click item implemented successfully, however, not show context menu. fix me? 

public class manageactivity extends activity {   private listview mainlistview ;   public void oncreate(bundle savedinstancestate) {     super.oncreate(savedinstancestate);     setcontentview(r.layout.list_main);         // find listview resource.      mainlistview = (listview) findviewbyid( r.id.mainlistview );     mainlistview.setadapter( listadapter );          registerforcontextmenu(mainlistview);  }  mainlistview.setonitemlongclicklistener(new android.widget.adapterview.onitemlongclicklistener() {          public boolean onitemlongclick(adapterview<?> arg0, view arg1,                 int pos, long id) {             // todo auto-generated method stub             string  audio_file_name    = (string) mainlistview.getitematposition(pos);             log.v("long clicked",string.valueof(audio_file_name));             return true;         }     });    }   @override   public void oncreatecontextmenu(contextmenu menu, view v, contextmenuinfo menuinfo){       menu.add(0, v.getid(), 0, "edit");       menu.add(0, v.getid(), 0, "delete");   }   @override   public boolean oncontextitemselected(menuitem item){       if(item.gettitle()=="edit")toast.maketext(getapplicationcontext(), "edit clicked", toast.length_long).show();       if(item.gettitle()=="delete")toast.maketext(getapplicationcontext(), "delete clicked", toast.length_long).show();       return true;   }

update log

09-30 15:24:35.611: e/androidruntime(26204): fatal exception: main 09-30 15:24:35.611: e/androidruntime(26204): java.lang.nullpointerexception 09-30 15:24:35.611: e/androidruntime(26204):    @ com.example.test.manageactivity.oncontextitemselected(manageactivity.java:91) 09-30 15:24:35.611: e/androidruntime(26204):    @ android.app.activity.onmenuitemselected(activity.java:2728) 09-30 15:24:35.611: e/androidruntime(26204):    @ com.android.internal.policy.impl.phonewindow$dialogmenucallback.onmenuitemselected(phonewindow.java:4342) 09-30 15:24:35.611: e/androidruntime(26204):    @ com.android.internal.view.menu.menubuilder.dispatchmenuitemselected(menubuilder.java:735) 09-30 15:24:35.611: e/androidruntime(26204):    @ com.android.internal.view.menu.menuitemimpl.invoke(menuitemimpl.java:152) 09-30 15:24:35.611: e/androidruntime(26204):    @ com.android.internal.view.menu.menubuilder.performitemaction(menubuilder.java:874) 09-30 15:24:35.611: e/androidruntime(26204):    @ com.android.internal.view.menu.menudialoghelper.onclick(menudialoghelper.java:204) 09-30 15:24:35.611: e/androidruntime(26204):    @ com.android.internal.app.alertcontroller$alertparams$3.onitemclick(alertcontroller.java:994) 09-30 15:24:35.611: e/androidruntime(26204):    @ android.widget.adapterview.performitemclick(adapterview.java:308) 09-30 15:24:35.611: e/androidruntime(26204):    @ android.widget.abslistview.performitemclick(abslistview.java:1509) 09-30 15:24:35.611: e/androidruntime(26204):    @ android.widget.abslistview$performclick.run(abslistview.java:3471) 09-30 15:24:35.611: e/androidruntime(26204):    @ android.widget.abslistview$3.run(abslistview.java:4834) 09-30 15:24:35.611: e/androidruntime(26204):    @ android.os.handler.handlecallback(handler.java:733) 09-30 15:24:35.611: e/androidruntime(26204):    @ android.os.handler.dispatchmessage(handler.java:95) 09-30 15:24:35.611: e/androidruntime(26204):    @ android.os.looper.loop(looper.java:146) 09-30 15:24:35.611: e/androidruntime(26204):    @ android.app.activitythread.main(activitythread.java:5602) 09-30 15:24:35.611: e/androidruntime(26204):    @ java.lang.reflect.method.invokenative(native method) 09-30 15:24:35.611: e/androidruntime(26204):    @ java.lang.reflect.method.invoke(method.java:515) 09-30 15:24:35.611: e/androidruntime(26204):    @ com.android.internal.os.zygoteinit$methodandargscaller.run(zygoteinit.java:1283) 09-30 15:24:35.611: e/androidruntime(26204):    @ com.android.internal.os.zygoteinit.main(zygoteinit.java:1099) 09-30 15:24:35.611: e/androidruntime(26204):    @ dalvik.system.nativestart.main(native method)

try this

@override public void oncreatecontextmenu(contextmenu menu, view v, contextmenuinfo menuinfo){     menu.add(v.getid(), 1, 0, "edit");     menu.add(v.getid(), 2, 0, "delete"); }

and oncontextitemselected() method should this.

@override public boolean oncontextitemselected(menuitem item) {      adapterview.adaptercontextmenuinfo acmi = (adaptercontextmenuinfo) item.getmenuinfo();     string  audio_file_namej = (string) mainlistview.getitematposition(acmi.position);     log.v("long clicked",string.valueof(audio_file_name));      switch (item.getitemid()) {     case 1:         toast.maketext(getapplicationcontext(), "edit clicked", toast.length_long).show();         break;     case 2:         toast.maketext(getapplicationcontext(), "delete clicked", toast.length_long).show();         break;     }     return true; }

Comments

Post a Comment

Popular posts from this blog

html - Outlook 2010 Anchor (url/address/link) -

i'm trying link specific pdf page msoutlook'10 or msword'10, #page=... anchor particularly useful , works fine elsewhere. unfortunately when click [ctr-k] in outlook or winword, links re-formatted assuming unc path. pdf file located on shared drive. using "file:" prefix links open pdf in adobe reader (outside of browser), , "http:" open inside browser. issue seem need open in browser "file:" prefix in order anchor work. know anchors work inside browser. outlook uses windows/explorer default program (based on file extension) seems open in adobe reader neglecting anchor. is aware of solution, link specific page or bookmark of shared-pdf ms outlook and/or winword link? common references: mailermailer.com/...anchor-tags-html-emails campaignmonitor.com/...anchor-links-in-email-newsletters/ stackoverflow.com/...anchor-in-pdf-document
Read more

javascript - Why does running this loop 9 times take 100x longer than running it 8 times? -

consider code: test = function() { } t = new test(); (var = 0; < 8; i++) { result = t instanceof test; } if change number of iterations 8 9 , loop take 100 times longer complete in latest version of firefox (41.0.1). tested on 2 different pcs , magic limit 8. here jsperf test used: http://jsperf.com/instanceof-8-times-vs-9-times does have idea why might happen? seems specific instanceof . not happen if else object, example check property. note: filed bugzilla bug this. jan de mooij mozilla team has posted details in bugzilla thread . here's simplistic interpretation of highly technical answers: in i < 8 case, firefox smart enough hoist result = t instanceof test; statement out of loop (according tests, doesn't seem omit altogether). in i < 9 case, apparently doesn't optimization . why? reason not clear, related fact 9 iterations threshold above function considered "hot" enough run through jit compiler. i < 8 cas...
Read more

Getting gateway time-out Rails app with Nginx + Puma running on Digital Ocean -

following this guide setup app on digital ocean droplet, not working. site not loading , it's throwing: "gateway time-out". the puma server works, since ps aux | grep puma prints: root 15878 0.0 0.4 376832 2168 ? sl 12:50 0:00 puma 2.13.4 (unix:///var/www/myapp/shared/tmp/sockets/myapp-puma.sock) [20150930164940] root 15881 0.0 0.7 903676 3692 ? sl 12:50 0:06 puma: cluster worker 0: 15878 [20150930164940] root 24654 0.0 0.1 11748 916 pts/2 s+ 18:00 0:00 grep --color=auto puma my nginx config: user root; worker_processes 1; events { worker_connections 1024; } http { upstream puma { server unix:///var/www/myapp/shared/tmp/sockets/myapp-puma.sock; } server { listen 80; server_name myapp.com; root /var/www/myapp/current/public; access_log /var/www/myapp/current/log/access.log; error_log /...
Read more