Android custom CursorAdapter with AsyncTask -


i'm trying build list image taken device , text. turns out taking images phone phone's camera task takes while i'm trying make fast possible user experience won't slower. got looks images loaded in 1 imageview , images spread other imageviews (i'm not sure implementation of viewholder technique , custom cursoradapter correct).

public class mycustomcurseradapter extends cursoradapter {   static class viewholder {     public textview nametext;     public imageview imagethumbnail;   }     cursor cursor;    public mycustomcurseradapter(context context, cursor c, int flags) {     super(context, c, flags);     // todo auto-generated constructor stub   }    @override   public void bindview(view view, context arg1, cursor cursor) {      viewholder holder = (viewholder)view.gettag();       int pathcol = cursor.getcolumnindex(newpicsqlitehelper.column_path);     string imageinsd = cursor.getstring(pathcol);       file imgfile = new  file(imageinsd);      if(imgfile.exists()){          int namecol = cursor.getcolumnindex(newpicsqlitehelper.column_pic_name);         string name = cursor.getstring(namecol);          if (name != null)              holder.nametext.settext(name);          imagetask task = new imagetask(holder.imagethumbnail);         task.execute(imgfile);     }    }    @override   public view newview(context arg0, cursor cur, viewgroup parent) {     layoutinflater inflater = layoutinflater.from(parent.getcontext());     view view = inflater.inflate(r.layout.new_pic_item, parent, false);     viewholder holder = new viewholder();      holder = new viewholder();     holder.nametext = (textview) view.findviewbyid(r.id.pic_name_entry);     holder.imagethumbnail = (imageview) view.findviewbyid(r.id.pic_thumbnail);      // tag can object, happens viewholder     view.settag(holder);       return view;   }     private class imagetask extends asynctask<file, void, bitmap>{     private final weakreference <imageview> imageviewreference;      public imagetask(imageview imageview) {         imageviewreference = new weakreference <imageview> (imageview);     }      @override     protected bitmap doinbackground(file... params) {         string path = params[0].getabsolutepath();          return decodesampledbitmapfromresource(path,75,75);     }      @override     protected void onpostexecute(bitmap result) {         if (imageviewreference != null) {             imageview imageview = imageviewreference.get();             if (imageview != null) {                 if (result != null) {                     imageview.setimagebitmap(result);                     imageview.setvisibility(imageview.visible);                 } else {                                     imageview.setvisibility(imageview.invisible);                 }             }          }      }      private bitmap decodesampledbitmapfromresource(string orgimagepath, int reqwidth, int reqheight) {       }      private int calculateinsamplesize(bitmapfactory.options options, int reqwidth, int reqheight) {    } }

i think probable reason thats taking time because images of @ least 1 mb size further can change thumbnail , retrieve , if still taking time put lazy downloading done when take image server(basically loads text , shows image when image)


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