java - on listview filtration is not working properly -

i facing problem while filtration of list .i using ontextchange() method .it working problem type single character in edit text soft keyboard gets disappear , have tap edit text again type complete string .i have done code soft keyboard not disappear after text change type still have tap on edit text.here code :

 search.addtextchangedlistener(new textwatcher() {         @ override         public void ontextchanged(charsequence s, int start, int before, int count) {             // todo auto-generated method stub             string startwith = s.tostring();             arraylist < myshares > filterlist = new arraylist < myshares > ();             (int = 0; < filelist.size(); i++) {                 if (filelist.get(i).getname().tolowercase().startswith(startwith) || filelist.get(i).getname().touppercase().startswith(startwith)) {                     filterlist.add(filelist.get(i));                 }             }             adapter = new mlistadapter(playlistactivity.this, filterlist);              playlistview.setadapter(adapter);             adapter.notifydatasetchanged();          }         @         override         public void beforetextchanged(charsequence s, int start, int count,             int after) {             }         @         override         public void aftertextchanged(editable s) {             search.setselection(search.gettext().length());             inputmethodmanager imm = (inputmethodmanager) getsystemservice(context.input_method_service);             imm.showsoftinput(search, inputmethodmanager.show_implicit);         }     }); 

here xml code edit text:

<edittext          android:ems="10"         android:id="@+id/search_bar"         android:layout_width="fill_parent"         android:layout_height="wrap_content"         android:layout_gravity="center"         android:layout_margin="5dp"         android:layout_weight="2"         android:background="@drawable/searchbox"         android:editable="true"         android:focusable="true"         android:inputtype="textfilter"         android:hint="search"         android:keepscreenon="true"         android:paddingleft="10dp"         android:textsize="15dp" /> 

i have set android:focusable="false " property on list view doesn't overlap soft keyboard. problem edit text still same .here screenshots

as insert single character list gets filter , cursor gone edit text box.

i went through arrayadapter's actual source code , looks written behave way.

arrayadapter has 2 lists begin with: mobjects , moriginalvalues. mobjects primary data set adapter work with. taking add() function, example:

public void add(t object) {     if (moriginalvalues != null) {     synchronized (mlock) {         moriginalvalues.add(object);         if (mnotifyonchange) notifydatasetchanged();     }  } else {     mobjects.add(object);     if (mnotifyonchange) notifydatasetchanged();  } 

}

moriginalvalues null operations (add, insert, remove, clear) default targeted mobjects. fine until moment decide enable filtering on list , perform one. filtering first time initializes moriginalvalues whatever mobjects has:

 private class arrayfilter extends filter {      @override      protected filterresults performfiltering(charsequence prefix) {     filterresults results = new filterresults();     if (moriginalvalues == null) {         synchronized (mlock) {             moriginalvalues = new arraylist<t>(mobjects);             //moriginalvalues no longer null         }     }     if (prefix == null || prefix.length() == 0) {         synchronized (mlock) {             arraylist<t> list = new arraylist<t>(moriginalvalues);             results.values = list;             results.count = list.size();         }      } else {         //filtering work happens here , new filtered set stored in newvalues         results.values = newvalues;         results.count = newvalues.size();      }      return results;   } @override protected void publishresults(charsequence constraint, filterresults results) {     //noinspection unchecked     mobjects = (list<t>) results.values;     if (results.count > 0) {         notifydatasetchanged();      } else {         notifydatasetinvalidated();      }   }  } 

moriginalvalues has copy of, well, original values/items, adapter work , display filtered list thru mobjects without losing pre-filtered data.

now forgive me (and please tell , explain) if thinking incorrect find weird because moriginalvalues no longer null, subsequent calls of adapter operations modify moriginalvalues. since adapter set @ mobjects primary data set, appear on screen nothing happening. until perform round of filtering. removing filter triggers this:

    if (prefix == null || prefix.length() == 0) {         synchronized (mlock) {             arraylist<t> list = new arraylist<t>(moriginalvalues);             results.values = list;             results.count = list.size();         }     } 

moriginalvalues, we've been modifying since our first filter (although couldn't see happening on screen) stored in list , copied on mobjects, displaying changes made. nevertheless point onwards: operations done on moriginalvalues, , changes appear after filtering.

as solution, i've come @ moment either (1) put boolean flag tells adapter operations if there ongoing filtering or not--if filtering complete, copy on contents of moriginalvalues mobjects, or (2) call adapter's filter object , pass empty string *.getfilter().filter("") force filter after every operation [as suggested santhosh].

it highly appreciated if can shed more light on issue or confirm did. thank you!