android - ListFragment doesn't update data from CursorLoader -

i need show data server. there several fragments items can displayed, not easy mantain updates. decided cache data in db , use contentprovider access it. have strange issue.

initially, there no data in database. create cursorloader , set cursoradapter adapter listfragment. receive server , insert several records. supposed loader automatically notified them , reload data. nothing happens, , listfragment stays empty.

the other strange thing related. i've wrote code add actionbar menu fragment. in situation oncreateoptionsmenu not called (despite of sethasoptionsmenu(true) in oncreate) , menu not added. when db has data, works normally.

it seems broken inside fragment, there nothing in logs. think, doing wrong?

here sample fragment, works this:

import android.database.cursor; import android.os.bundle; import android.support.v4.app.listfragment; import android.support.v4.app.loadermanager; import android.support.v4.content.cursorloader; import android.support.v4.content.loader; import android.support.v4.widget.simplecursoradapter; import android.view.menu; import android.view.menuinflater;  public class feedfragment3 extends listfragment implements loadermanager.loadercallbacks<cursor> {     private static final int loader_id = 1;      private simplecursoradapter madapter;      @override     public void oncreate(bundle savedinstancestate) {         super.oncreate(savedinstancestate);         sethasoptionsmenu(true);     }      @override     public void onresume() {         super.onresume();         getactivity().getactionbar().settitle(r.string.feed_ab_title);     }      @override     public void oncreateoptionsmenu(menu menu, menuinflater inflater) {         inflater.inflate(r.menu.feed, menu);     }      @override     public void onactivitycreated(bundle savedinstancestate) {         super.onactivitycreated(savedinstancestate);          madapter = new simplecursoradapter(getactivity(), android.r.layout.simple_list_item_1, null,             new string[] {"title"},             new int[] {android.r.id.text1}         );         setlistadapter(madapter);          getactivity().getsupportloadermanager().initloader(loader_id, null, this);     }      @override     public loader<cursor> oncreateloader(int id, bundle args) {         return new cursorloader(getactivity(), consts.getfeedcontenturi(), null, null, null, null);     }      @override     public void onloadfinished(loader<cursor> loader, cursor data) {         madapter.changecursor(data);     }      @override     public void onloaderreset(loader<cursor> loader) {         madapter.changecursor(null);     } } 

here part of contentprovider. suppose calling notifychange in insert , setnotificationuri in query make contentprovider notified changes. may not enough?

public class feedcontentprovider extends contentprovider {     ...      @override     public cursor query(uri uri, string[] projection, string selection, string[] selectionargs, string sortorder) {         dplog.it(tag, "query: [%s]", uri);          sqlitequerybuilder qb = new sqlitequerybuilder();         qb.settables("feed");         qb.setprojectionmap(mprojectionmap);          cursor c = qb.query(db, projection, selection, selectionargs, null, null, null);         c.setnotificationuri(getcontext().getcontentresolver(), uri);         return c;     }      @override     public uri insert(uri uri, contentvalues values) {         dplog.it(tag, "insert: [%s]", uri);          string tablename = mtablenamesforcode.get(murimatcher.match(uri));         mdb.getwritabledatabase().insert(tablename, null, values);          getcontext().getcontentresolver().notifychange(uri, null);          return uri;     }      ... } 

opening fragment in activity:

private void openfeedfragment() {     mfeedfragment = new feedfragment3();     showrootfragment(mfeedfragment);     updatefeed(); }  private void updatefeed() {     mapi.requestfeed(         new response.listener<feedresponse>() {             @override             public void onresponse(feedresponse response) {                 uri uri = postscontract.getfeedcontenturi();                 set<long> existingids = getpostids(uri);                  arraylist<contentprovideroperation> operations = createmergeoperations();                  try {                     getcontentresolver().applybatch(postscontract.authority, operations);                 } catch (remoteexception e) {                     ...                 } catch (operationapplicationexception e) {                     ...                 }             }         },         null     ); } 

logs when creating fragment

03-21 19:12:35.041  22005-22344/com.app d/app.contentprovider﹕ cursor size: [0] 03-21 19:12:35.061  22005-22005/com.app v/app.checkpoint-checkpoint﹕ com.app.ui.fragment.feedfragment3.onloadfinished (feedfragment3.java:60) 03-21 19:12:36.012  22005-22066/com.app d/app.api﹕ request 'feed' finished 03-21 19:12:36.092  22005-22066/com.app d/dalvikvm﹕ gc_for_alloc freed 1417k, 11% free 12805k/14256k, paused 25ms, total 25ms 03-21 19:12:36.122  22005-22005/com.app i/app.contentprovider﹕ query: [content://com.app.content.posts/feed] (postscontentprovider.java:59) 03-21 19:12:36.122  22005-22005/com.app d/app.contentprovider﹕ cursor size: [0] (postscontentprovider.java:78) 03-21 19:12:36.142  22005-22005/com.app i/app.contentprovider﹕ insert: [content://com.app.content.posts/feed] (postscontentprovider.java:97) 03-21 19:12:36.262  22005-22005/com.app d/app.contentprovider﹕ inserted id: [1] (postscontentprovider.java:102) ... 03-21 19:12:37.453  22005-22005/com.app d/app.contentprovider﹕ inserted id: [21] (postscontentprovider.java:102) 03-21 19:12:37.453  22005-22348/com.app i/app.contentprovider﹕ query: [content://com.app.content.posts/feed] (postscontentprovider.java:59) 03-21 19:12:37.453  22005-22348/com.app d/app.contentprovider﹕ cursor size: [21] (postscontentprovider.java:78) 03-21 19:12:37.463  22005-22073/com.app i/app.contentprovider﹕ query: [content://com.app.content.posts/feed] (postscontentprovider.java:59) 03-21 19:12:37.463  22005-22073/com.app d/app.contentprovider﹕ cursor size: [21] (postscontentprovider.java:78) 03-21 19:12:37.463  22005-22005/com.app v/app.checkpoint-checkpoint﹕ com.app.ui.fragment.feedfragment3.onloadfinished (feedfragment3.java:60) 

in code :-

use swapcursor(data) instead of changecursor(data)

 @override     public loader<cursor> oncreateloader(int id, bundle args) {         return new cursorloader(getactivity(), consts.getfeedcontenturi(), null, null, null, null);     }      @override     public void onloadfinished(loader<cursor> loader, cursor data) {         madapter.swapcursor(data);     }      @override     public void onloaderreset(loader<cursor> loader) {         madapter.swapcursor(null);     } 

try