android - ListView scroll position not maintained after loading content using CWAC Endless Adpater -

update

basically, bbrakenhoff has answered question there 1 more thing left fix. how can update contents of endlessfeedadapter (mendlsfidadptr)? need clear item , reload. i'm using cwac endlessadapater. there trick clear contents or easier program method? after done scroll position should maintaind.

---

i getting data server , updating endlessfeedadapter when content changes. each time updating adapter , reloading content. problem after reloading list jumps right top scroll position not maintained. have tried setselection , setselectionfromtop extensively, without positive results.

how maintain scroll position after adapter has been updated?

i have been going through forums searching answer nothing seems working.

i have tried these: maintain/save/restore scroll position when returning listview

this didn't work:

int index = mlist.getfirstvisibleposition(); view v = mlist.getchildat(0); int top = (v == null) ? 0 : v.gettop();    // restore index , position mlist.setselectionfromtop(index, top); 

nor this:

// save listview state parcelable state = listview.onsaveinstancestate();  // set new items listview.setadapter(adapter);  // restore previous state (including selected item index , scroll position) listview.onrestoreinstancestate(state); 

nor other solutions such setting runnable or setting scrollpositiony. setting notifydatachanged didn't work loading different lists.

my code:

private void showfeed() {      if (mfeedactivity.minfeed) {         mquickreturnview.setvisibility(view.visible);     } else {         mquickreturnview.setvisibility(view.gone);     }                                        activity actvt= getactivity();     if (actvt == null || mfeedlistview == null) return;      actvt.invalidateoptionsmenu();      mfeedlistview.setvisibility(view.visible);      //updated response     if (madapter == null){         madapter = new feedadapter(actvt, 0, mfeed.getitems().getfeeditemlist(), this);     } else {         madapter.clear();         madapter.addall(mfeed.getitems().getfeeditemlist());         madapter.notifydatasetchanged();     }      mendlsfidadptr = new endlessfeedadapter(actvt, madapter, r.layout.progress_row, mfeed.isshowmorebar(),      mendlsfidadptr.setruninbackground(false);      //parcelable state = mfeedlistview.onsaveinstancestate();     mfeedlistview.setadapter(mendlsfidadptr);     //mfeedlistview.onrestoreinstancestate(state);        mfeedlistview.setselectionfromtop(mfirstvisibleitem, mvisibleitemoffset);      if(!(mfeedscope.equalsignorecase(feedscope.bookmarks.xmlvalue()) ||             mfeedscope.equalsignorecase(feedscope.document.xmlvalue()) ||             mfeedscope.equalsignorecase(feedscope.notifications.xmlvalue()) ||             mfeedscope.equalsignorecase(feedscope.received_tasks.xmlvalue()) ||             mfeedscope.equalsignorecase(feedscope.send_tasks.xmlvalue()))) {    mfeedlistview.getviewtreeobserver().addongloballayoutlistener(mgloballayoutlistener);           mfeedlistview.setonscrolllistener(new abslistview.onscrolllistener() {             @override             public void onscrollstatechanged(abslistview view, int scrollstate) {                  mcanshowhide = scrollstate == scroll_state_fling;              }               @override             public void onscroll(abslistview view, int firstvisibleitem, int visibleitemcount, int totalitemcount) {                  view v = mfeedlistview.getchildat(0);                 //view v = null;                 if(!mfeedactivity.minfeed || v == null)                     return;                  int top = v.gettop();                  if(misanimating) {                     mvisibleitemoffset = top;                     mfirstvisibleitem = firstvisibleitem;                     return;                 }                  boolean hide = false;                 boolean show = false;                 float stickyheight = getresources().getdimension(r.dimen.sticky_height);                  if(firstvisibleitem == mfirstvisibleitem) {                     if((top + stickyheight) < mvisibleitemoffset) {                         // content scrolled down                         // if shown hide quickactionview                         if(mquickreturnshown) {                             hide = true;                         }                      } else if (top > mvisibleitemoffset) {                         // content scrolled                         // if hidden show quickactionview                         if(!mquickreturnshown) {                             show = true;                         }                      }                  } else if(firstvisibleitem > mfirstvisibleitem) {                     // content scrolled down                     // if shown hide quickactionview                     if(mquickreturnshown) {                         hide = true;                     }                  } else if (firstvisibleitem < mfirstvisibleitem) {                     // content scrolled                     // if hidden show quickactionview                     if(!mquickreturnshown) {                         show = true;                     }                 }                  if((show && mcanshowhide) || (top == 0 && !mquickreturnshown)) {                     mtranslateanimation = new translateanimation(0, 0, -mquickreturnheight, 0);                     mtranslateanimation.setduration(duration_millis);                     mtranslateanimation.setanimationlistener(new animation.animationlistener() {                         @override                         public void onanimationstart(animation animation) {                             misanimating = true;                         }                          @override                         public void onanimationend(animation animation) {                             misanimating = false;                             mquickreturnshown = true;                             mquickreturnview.setvisibility(view.visible);                         }                          @override                         public void onanimationrepeat(animation animation) {                          }                     });                      mquickreturnview.startanimation(mtranslateanimation);                 }                  if(hide) {                     mtranslateanimation = new translateanimation(0, 0, 0, -mquickreturnheight);                     mtranslateanimation.setduration(duration_millis);                     mtranslateanimation.setanimationlistener(new animation.animationlistener() {                         @override                         public void onanimationstart(animation animation) {                             misanimating = true;                         }                          @override                         public void onanimationend(animation animation) {                             misanimating = false;                             mquickreturnshown = false;                             mquickreturnview.setvisibility(view.gone);                         }                          @override                         public void onanimationrepeat(animation animation) { }                     });                       mquickreturnview.startanimation(mtranslateanimation);                 }                  mvisibleitemoffset = top;                 mfirstvisibleitem = firstvisibleitem;             }         });     } else {         mfeedlistview.setonscrolllistener(null);      }      mfeedlistview.setselectionfromtop(mfirstvisibleitem, mvisibleitemoffset);      //mfeedlistview.scrollto(mcurrentx,mcurrenty);      if(mfeed.getitems().getfeeditemlist().size() == 0) {         memptyfeedview.setvisibility(view.visible);     } } 

any appreciated!

are calling method showfeed() everytime received new data? if yes, maybe try refill adapter instead of assigning new 1 every time.

i don't know doing in adapter, i'll show how did in 1 of apps.

in activity/fragment when want update list new items:

private void refreshcalendar(arraylist<calendarday> newcalendar) {     if (madapter == null) {         madapter = new calendaradapter(getactivity(), newcalendar);         mexpandablelistview.setadapter(madapter);     }     else {         madapter.refill(newcalendar);     }      restoreinstancestate(); } 

and in adapter:

public void refill(arraylist<calendarday> newcalendar) {     mcalendar.clear();     mcalendar.addall(newcalendar);     notifydatasetchanged(); }