Android Listview GC_FOR_ALLOC freed: DDMS android.graphics.Bitmap -

i'm having trouble listview in android. when start scrolling down list, slow , see gc called. when i'm @ bottom of list, works fine , smooth. think @ point viewholder work.

but can't find source calling gc. searched lead to:

ddms     436816    byte[]   1   android.graphics.bitmap    nativecreate  

i can't interpret line. arrayadapter , it's getview method looks this:

 public class diagnoseadapter extends arrayadapter<visualizer> {    @override    public view getview(int position, view convertview, viewgroup parent) {      int type = type_default;     final visualizer item = getitem(position);      switch(item.gettype()){          case type_default:                 convertview = defaulttextview.getview(position, convertview, mlayoutinflater, item, parent);             break;       // more cases/types      }   return convertview;   } } 

which calling following getview method of class defaulttextview

public class defaulttextview{   public static view getview(int position, view convertview, layoutinflater layoutinflater, visualizer item, viewgroup parent){     viewholder holder;     if (convertview == null || item.getreleatedobject() == null || convertview.gettag()!=tag_default) {         convertview = layoutinflater.inflate(r.layout.diagnose_item, null);       holder = new viewholder();       holder.value = (textview) convertview.findviewbyid(r.id.diagnose_function_value);      holder.name = (textview) convertview.findviewbyid(r.id.diagnose_function_setname);      holder.mlinlayout = (linearlayout) convertview.findviewbyid(r.id.default_linlayout);       convertview.settag(tag_default);      convertview.settag(r.layout.diagnose_item,holder);      item.setreleatedobject(convertview);      } else {      holder = (viewholder) convertview.gettag(r.layout.diagnose_item);      }      holder.value.settext(item.tostring());     holder.name.settext(item.gettooltip());           holder.mlinlayout.removeallviews();          if (item.getupdateflag(4)) {              if (holder.back == null){                 holder.back = new imageview(convertview.getcontext());                 holder.back.setscaletype(scaletype.fit_center);                 holder.back.setadjustviewbounds(true);                 holder.back.setimagebitmap(bm1);              }              holder.mlinlayout.addview(holder.back);          }           if (item.getupdateflag(1)) {              if (holder.update == null){                     holder.update = new imageview(convertview.getcontext());                     holder.update.setscaletype(scaletype.fit_center);                     holder.update.setadjustviewbounds(true);                     holder.update.setimagebitmap(bm2);                   }              holder.mlinlayout.addview(holder.update);         }           if (item.getupdateflag(2)) {             if (holder.timer == null){                 holder.timer = new imageview(convertview.getcontext());                 holder.timer.setscaletype(scaletype.fit_center);                 holder.timer.setadjustviewbounds(true);                 holder.timer.setimagebitmap(bm3)               }             holder.mlinlayout.addview(holder.timer);         }           if (item.getupdateflag(3)) {             if (holder.log == null){                 holder.log = new imageview(convertview.getcontext());                 holder.log.setscaletype(scaletype.fit_center);                 holder.log.setadjustviewbounds(true);                 holder.log.setimagebitmap(bm4);               }             holder.mlinlayout.addview(holder.log);         }          if (item.getupdateflag(0)) {             if (holder.forward == null){                 holder.forward = new imageview(convertview.getcontext());                 holder.forward.setscaletype(scaletype.fit_center);                 holder.forward.setadjustviewbounds(true);                 holder.forward.setimagebitmap(bm5);               }             holder.mlinlayout.addview(holder.forward);         }      return convertview; }  static class viewholder {                 textview name, value;                 imageview back, update, timer, log, forward;     linearlayout mlinlayout; }   } 

even if comment linearlayout out, have list 2 textviews.

so question. miss anything. stupid thing? how listview smoother? btw: read in different thread, happening if listview has attribute android:cachecolorhint="#00000000. don't have attribute.

i hope has solution. thanks!

about source of gc calls. if i'm understanding code correctly, everytime listview items recycled , call removeallviews(), dynamically created imageview removed , bitmap garbage collected. so, maybe gc calls avoided if use same imageview declaring in xml layout , replace bitmap according getupdateflag().

and 2 more things listviews , images. first thing if image big, listview going laggy no matter what. need scale image down if case( loading large bitmaps efficiently). , second, maybe need implement lazy list, loads images on demand, there famous question --> how do lazy load of images in listview?