android - ImageView crashing custom adapter at getView() -


my list view crashing @ getview. when application first loads works as navigate away or take screenshot , try share app crashes. custom adapter.

public class customadapter extends baseadapter { private list<alarmitem> alarms; private context context;  public customadapter(list<alarmitem> alarms,context context) {     this.context = context;     this.alarms = alarms; }   @override public int getcount() {     return alarms.size(); }  @override public alarmitem getitem(int position) {     return alarms.get(position); }  @override public long getitemid(int position) {     return position; }  @override public view getview(int position, view convertview, viewgroup parent) {      final alarmitem item = getitem(position);     holder holder;      if(convertview==null)     {         layoutinflater layoutinflater = (layoutinflater)context.getsystemservice(context.layout_inflater_service);         convertview = layoutinflater.inflate(r.layout.my_alarm_row,parent,false);         holder = new holder();         holder.image= (roundedimageview)convertview.findviewbyid(r.id.picture);         holder.waketext =(robotolight)convertview.findviewbyid(r.id.waketext);         holder.name =(robotoregular)convertview.findviewbyid(r.id.name);         holder.period = (robotolight)convertview.findviewbyid(r.id.period);         holder.time = (robotoregular)convertview.findviewbyid(r.id.time);         holder.day1 =(robotolight)convertview.findviewbyid(r.id.day1);         holder.day2 =(robotolight)convertview.findviewbyid(r.id.day2);         holder.day3 =(robotolight)convertview.findviewbyid(r.id.day3);         holder.day4 =(robotolight)convertview.findviewbyid(r.id.day4);         holder.day5 =(robotolight)convertview.findviewbyid(r.id.day5);         holder.day6 =(robotolight)convertview.findviewbyid(r.id.day6);         holder.day7 =(robotolight)convertview.findviewbyid(r.id.day7);     }     else     {         holder = (holder)convertview.gettag();     }       urlimageviewhelper.seturldrawable(holder.image, "http://graph.facebook.com/" + item.getprofileid().trim() + "/picture?style=large");       holder.waketext.settext(context.getstring(r.string.wake_message));     holder.name.settext(item.getname()+" ");     holder.period.settext(item.getperiod());     holder.time.settext(item.gettime());      /**      * block code places sets color of particular day. if active      * sets particular colour if not inactive colour remains.      */     list<robotolight> daylist = new arraylist<robotolight>();     daylist.add(holder.day1);     daylist.add(holder.day2);     daylist.add(holder.day3);     daylist.add(holder.day4);     daylist.add(holder.day5);     daylist.add(holder.day6);     daylist.add(holder.day7);       for(int x=0;x<7;x++)     {         /**          * if day @ particular point in string equal 1 means active          * therefore set active color.          */         if(item.getdays().charat(x) == '1')         {              daylist.get(x).settextcolor(r.color.alarm_day_active);         }         else         {             daylist.get(x).settextcolor(r.color.alarm_day_inactive);         }     }       return convertview; }  public static class holder {      roundedimageview image;     robotolight waketext;     robotoregular name;     robotolight period;     robotoregular time;     robotolight day1;     robotolight day2;     robotolight day3;     robotolight day4;     robotolight day5;     robotolight day6;     robotolight day7; }    }

this log cat

    09-04 08:02:45.948: error/androidruntime(9402): fatal exception: main     java.lang.nullpointerexception     @ com.wake.friend.adapter.alarmadapter.getview(alarmadapter.java:82)     @ android.widget.abslistview.obtainview(abslistview.java:2334)     @ android.widget.listview.makeandaddview(listview.java:1937)     @ android.widget.listview.fillspecific(listview.java:1483)     @ android.widget.listview.layoutchildren(listview.java:1765)     @ android.widget.abslistview.onlayout(abslistview.java:2178)     @ android.view.view.layout(view.java)     @ android.view.viewgroup.layout(viewgroup.java:4380)     @ android.widget.relativelayout.onlayout(relativelayout.java:948)     @ android.view.view.layout(view.java)     @ android.view.viewgroup.layout(viewgroup.java:4380)     @ android.widget.framelayout.onlayout(framelayout.java:448)     @ android.view.view.layout(view.java)     @ android.view.viewgroup.layout(viewgroup.java:4380)     @ android.support.v4.view.viewpager.onlayout(viewpager.java:1141)     @ android.view.view.layout(view.java)

and line 82 saying null pointer exception being thrown @ this.

urlimageviewhelper.seturldrawable(holder.image, "http://graph.facebook.com/" + item.getprofileid().trim() + "/picture?style=large");

i using image downloading helper retrieve images web.

the reason error occurring because accessing elements of holder class outside if statement checked if convertview null. therefore works first time when list view called again , convertview isn't null holder can't accessed in same way.therefore best if put assignment inside if function so. 

 public class customadapter extends baseadapter { private list<alarmitem> alarms; private context context;  public customadapter(list<alarmitem> alarms,context context) { this.context = context; this.alarms = alarms; }   @override public int getcount() { return alarms.size(); }  @override public alarmitem getitem(int position) { return alarms.get(position); }  @override public long getitemid(int position) { return position; }  @override  public view getview(int position, view convertview, viewgroup parent)  {  final alarmitem item = getitem(position); holder holder;  if(convertview==null) {     layoutinflater layoutinflater = (layoutinflater)context.getsystemservice(context.layout_inflater_service);     convertview = layoutinflater.inflate(r.layout.my_alarm_row,parent,false);     holder = new holder();     holder.image= (roundedimageview)convertview.findviewbyid(r.id.picture);     holder.waketext =(robotolight)convertview.findviewbyid(r.id.waketext);     holder.name =(robotoregular)convertview.findviewbyid(r.id.name);     holder.period = (robotolight)convertview.findviewbyid(r.id.period);     holder.time = (robotoregular)convertview.findviewbyid(r.id.time);     holder.day1 =(robotolight)convertview.findviewbyid(r.id.day1);     holder.day2 =(robotolight)convertview.findviewbyid(r.id.day2);     holder.day3 =(robotolight)convertview.findviewbyid(r.id.day3);     holder.day4 =(robotolight)convertview.findviewbyid(r.id.day4);     holder.day5 =(robotolight)convertview.findviewbyid(r.id.day5);     holder.day6 =(robotolight)convertview.findviewbyid(r.id.day6);     holder.day7 =(robotolight)convertview.findviewbyid(r.id.day7);      urlimageviewhelper.seturldrawable(holder.image, "http://graph.facebook.com/" + item.getprofileid().trim() + "/picture?style=large");       holder.waketext.settext(context.getstring(r.string.wake_message));     holder.name.settext(item.getname()+" ");     holder.period.settext(item.getperiod());     holder.time.settext(item.gettime());      /**      * block code places sets color of particular day. if active      * sets particular colour if not inactive colour remains.      */     list<robotolight> daylist = new arraylist<robotolight>();     daylist.add(holder.day1);     daylist.add(holder.day2);     daylist.add(holder.day3);     daylist.add(holder.day4);     daylist.add(holder.day5);     daylist.add(holder.day6);     daylist.add(holder.day7);       for(int x=0;x<7;x++)     {         /**          * if day @ particular point in string equal 1 means active          * therefore set active color.          */         if(item.getdays().charat(x) == '1')         {              daylist.get(x).settextcolor(r.color.alarm_day_active);         }         else         {             daylist.get(x).settextcolor(r.color.alarm_day_inactive);         }     } } else {     holder = (holder)convertview.gettag(); }      return convertview; }  public static class holder {  roundedimageview image; robotolight waketext; robotoregular name; robotolight period; robotoregular time; robotolight day1; robotolight day2; robotolight day3; robotolight day4; robotolight day5; robotolight day6; robotolight day7; }    }

Comments

Post a Comment

Popular posts from this blog

html - How to style widget with post count different than without post count -

i have border below li elements in wordpress widget types appropriate. element inside set block gives them nice easy click full width. the problem, when choose option "show post count" when adding widget such categories or archives displays post count plain text after tag , because tag block pushes post number text line below. whether choose show post count or not show post count still gives exact same element identifyer example "widget_categories". how style post count not on next line still keep links non post count list items full width? here's example on sidebar www.bbmthemes.com/themes/modular/blog-standard/ in order solve problem need remove display:block; for ul.widgets ul a , add in it's place line-height: 33px; what going achieve have same visual effect. what going lose doing links going work on text , not on "box". the other way out of find post count coming , make changes this. example change text count i
Read more

How to remove text and logo OR add Overflow on Android ActionBar using AppCompat on API 8? -

have researched death , cannot find answer. i have actionbar using appcompat. supporting api v7 (api v8 do). actionbar works api v11. api < v11 has problem of removing icon (and feature) actionbar without supplying overflow. big picture have app logo, app title, , 3 icons squidging same actionbar on low end phone. trying make room! i happy 1 of 2 solutions. either: a method of getting overflow functionality can retrieved pull down. (preferred) method of removing icon , text actionbar below current xml api 11+: <resources> <!-- base application theme api 11+. theme replaces appbasetheme res/values/styles.xml on api 11+ devices. --> <style name="appbasetheme" parent="theme.appcompat.light.darkactionbar"> <item name="android:actionbarstyle">@style/liteactionbarstyle</item> <item name="actionbarstyle">@style/liteactionbarstyle</item> </st
Read more

javascript - storing input from prompt in array and displaying the array -

i want take the inputs user prompt, store input in array, , display it. want take 10 inputs user using for loop. have tried do-while shown below. var givennames = new array(); var pattern = /[\w\d]{1,}/ig; do{ var name = prompt("enter names. letters , digits accepted!\nentering empty field stops asking",""); if(name && name.match(pattern)){givennames.push(name);} } while(name != ""); function displaynames(){ if(givennames.length > 0){ document.getelementbyid("list").innerhtml = "<span style='color:navy;font- weight:bold;'>given names are:<\/span><br><br>" + givennames.join("<br><br>"); } else { document.getelementbyid("list").innerhtml = "<span style='color:navy;font-weight:bold;'>nothing has been given!<\/span>"; } } how replace for loop? var givennames = new array();
Read more