android - Issue with the clear(); statement placement within ListViewAdpater -


so having problems duplicate items showing in listview when switching between fragments using drop down menu in action, placed clear(); statement fixed problem, crashes convertview.setonclicklistener below it. if remove clear(); statement works fine duplicate items in listview. using actionbarsherlock , code taken http://www.androidbegin.com/tutorial/implementing-actionbarsherlock-search-collapsible-view-in-android/ appriciated in trying figure out how can work together. if there other code need, let me know.

public class listviewadapter extends baseadapter { // declare variables context mcontext; layoutinflater inflater; private list<errorcode> errorcodelist = null; private arraylist<errorcode> arraylist;  public listviewadapter(context context, list<errorcode> errorcodelist)  {     mcontext = context;     this.errorcodelist = errorcodelist;     inflater = layoutinflater.from(mcontext);     this.arraylist = new arraylist<errorcode>();     this.arraylist.addall(errorcodelist); }  public class viewholder  {     textview errorname;     textview codevalue;     textview description;     textview solution; }  @override public int getcount()  {     return errorcodelist.size(); }  @override public errorcode getitem(int position)  {     return errorcodelist.get(position); }  @override public long getitemid(int position)  {     return position; }   public view getview(final int position, view convertview, viewgroup parent)  {     final viewholder holder;     if (convertview == null)      {         holder = new viewholder();         convertview = inflater.inflate(r.layout.listview_item, null);         // locate textviews in listview_item.xml         holder.errorname = (textview) convertview.findviewbyid(r.id.errorname);         holder.codevalue = (textview) convertview.findviewbyid(r.id.codevalue);         holder.description = (textview) convertview.findviewbyid(r.id.description);         holder.solution = (textview) convertview.findviewbyid(r.id.solution);         convertview.settag(holder);     }     else      {          holder = (viewholder) convertview.gettag();     }     // set results textviews     holder.errorname.settext(errorcodelist.get(position).geterrorname());     holder.codevalue.settext(errorcodelist.get(position).getcodevalue());     holder.description.settext(errorcodelist.get(position).getdescription());     holder.solution.settext(errorcodelist.get(position).getsolution());     errorcodelist.clear();      // listen listview item click     convertview.setonclicklistener(new onclicklistener()      {         public void onclick(view arg0)          {             // send single item click data singleitemview class             intent intent = new intent(mcontext, singleitemview.class);             // pass data errorname             intent.putextra("errorname",(errorcodelist.get(position).geterrorname()));             // pass data errorcode             intent.putextra("codevalue",(errorcodelist.get(position).getcodevalue()));             // pass data description             intent.putextra("description",(errorcodelist.get(position).getdescription()));             // pass data solution             intent.putextra("solution",(errorcodelist.get(position).getsolution()));             // start singleitemview class             mcontext.startactivity(intent);         }      });     return convertview; }  // filter class public void filter(string chartext)  {     chartext = chartext.tolowercase(locale.getdefault());     errorcodelist.clear();     if (chartext.length() == 0)      {         errorcodelist.addall(arraylist);     }     else     {         (errorcode ec : arraylist)         {             // search filter code             if (ec.geterrorname().tolowercase(locale.getdefault()).contains(chartext))             {                 errorcodelist.add(ec);             }             if (ec.getcodevalue().tolowercase(locale.getdefault()).contains(chartext))             {                 errorcodelist.add(ec);             }         }      }            notifydatasetchanged(); }  }

here logcat when convertview.setonclicklistener crashes:

10-07 15:09:26.872: e/androidruntime(21500): fatal exception: main 10-07 15:09:26.872: e/androidruntime(21500): java.lang.indexoutofboundsexception: invalid index 0, size 0 10-07 15:09:26.872: e/androidruntime(21500):    @ java.util.arraylist.throwindexoutofboundsexception(arraylist.java:251) 10-07 15:09:26.872: e/androidruntime(21500):    @ java.util.arraylist.get(arraylist.java:304) 10-07 15:09:26.872: e/androidruntime(21500):    @ com.testapplication.test2v5.listviewadapter$1.onclick(listviewadapter.java:93) 10-07 15:09:26.872: e/androidruntime(21500):    @ android.view.view.performclick(view.java:4204) 10-07 15:09:26.872: e/androidruntime(21500):    @ android.view.view$performclick.run(view.java:17355) 10-07 15:09:26.872: e/androidruntime(21500):    @ android.os.handler.handlecallback(handler.java:725) 10-07 15:09:26.872: e/androidruntime(21500):    @ android.os.handler.dispatchmessage(handler.java:92) 10-07 15:09:26.872: e/androidruntime(21500):    @ android.os.looper.loop(looper.java:137) 10-07 15:09:26.872: e/androidruntime(21500):    @ android.app.activitythread.main(activitythread.java:5041) 10-07 15:09:26.872: e/androidruntime(21500):    @ java.lang.reflect.method.invokenative(native method) 10-07 15:09:26.872: e/androidruntime(21500):    @ java.lang.reflect.method.invoke(method.java:511) 10-07 15:09:26.872: e/androidruntime(21500):    @ com.android.internal.os.zygoteinit$methodandargscaller.run(zygoteinit.java:793) 10-07 15:09:26.872: e/androidruntime(21500):    @ com.android.internal.os.zygoteinit.main(zygoteinit.java:560) 10-07 15:09:26.872: e/androidruntime(21500):    @ dalvik.system.nativestart.main(native method)

you cannot alter list being iterated adapter inside own adapter methods, because changing positions. worst clear list. explains new error. so, remove clear() inside getview method.

the duplicated items comming filter, because can add 1 item twice if matches error , code. change to:

         // search filter code         if (ec.geterrorname().tolowercase(locale.getdefault()).contains(chartext))         {             errorcodelist.add(ec);         }         else if (ec.getcodevalue().tolowercase(locale.getdefault()).contains(chartext))         {             errorcodelist.add(ec);         }

Comments

Post a Comment

Popular posts from this blog

c++ - CryptStringToBinary API behavior -

i seeing strange behavior cryptstringtobinary cryptography api. please see below code (config: x64 debug): #include "stdafx.h" #include <windows.h> #include <strsafe.h> #include <iostream> #include <exception> void main() { dword dwskip; dword dwflags; dword dwdatalen; //lpcwstr pszinput = l"jaaaaaecaaadzgaaakqaagdnnl1l56bwgfjdgr3rpxtqqqn6daw3usv2emkjym4t"; //this works fine lpcwstr pszinput = l"mytest"; //doesnt work, api returns false,error code 0x0000000d // determine size of byte array , allocate memory. if(! cryptstringtobinary( pszinput, _tcslen( pszinput ) + 1, crypt_string_base64, null, &dwdatalen, &dwskip, &dwflags ) ) { dword dw = getlasterror(); //0x0000000d: data invalid throw std::exception( "error computing byte length." ); } byte *pbytebyte = null; try { ...
Read more

c++ - Correct method for redrawing a layered window -

i have window created ws_ex_layered window style. drawing onto memory bitmap using gdi+, , using updatelayeredwindow update graphical content of layered window. intend use window main window of application, require redraw frequently. seeing layered windows not receive wm_paint windows message [?] , need come appropriate method re-drawing window. optimisation not essential , it's nice have cake , eat too. therefore, in search of "correct" method use. here thoughts far: i guess it's idea render onto off-screen bitmap before bitblt ing or similar. 60 frames rendered per second should (more than?) enough (but how compare other applications' frame rates?). possible solutions: use settimer send wm_timer message on regular basis. useful because through specifying time-out value, can achieve desired frames per second, without requirement measure duration "frame" takes rendered. would cause input or other lags due frequency , speed of m...
Read more

java.util.scanner - How to read and add only numbers to array from a text file -

i'm learning java , have question regarding reading file want read numbers file contains strings well. here example of file: 66.56 "3 java 3-43 5-42 2.1 1 and here coding: public class test { public static void main (string [] args){ if (0 < args.length) { file x = new file(args[0]); try{ scanner in = new scanner( new fileinputstream(x)); arraylist<double> test = new arraylist<>(); while(in.hasnext()){ if(in.hasnextdouble()){ double f=in.nextdouble(); test.add(f);} else {in.next();} } catch(ioexception e) { system.err.println("exception during reading: " + e); } } my problem add 66.56,2.1 , 1 doesn't add 3 after "3 or ignores 3-43 , 5-42 can tell me how skip strings , add doubles here? thanks all said 3 ie; "3, 3-43 , 4-42 strings either u read string , split , check number @ " , - or put in space between characters , integers. jvm after compilation tre...
Read more