simplecursoradapter - Android Where to call changecursor? -

i have custom simplecursoradapter getview this:

public view getview(int position, view convertview, viewgroup parent) {      //this.changecursor(c); tried didn't work.     this.c.movetoposition(position);     int urlcol = c.getcolumnindex("url");     final string url = c.getstring(urlcol);     //other code stuff.     imagedownloader.download(url, thumbnail, rowid, db,pb); 

the imagedownloader calls update on dbadapter c.getstring(urlcol) still gives me previous value. tried putting changecursor @ position above still got same value. should calling this? thanks!

i don't want listview redraw want latest data cursor. i'm passing in imageview , url imagedownloader class download image, set bitmap imageview , update database. noticed cursor not updated getview method returns me same data.

this custom simplecursoradapter declaration. getview mentioned above.

public class messagescursoradapter extends simplecursoradapter {  private final imagedownloader imagedownloader = new imagedownloader(); 

imagedownloader class

public void download(string url, imageview imageview, int rowid,         testdbadapter db,progressbar pb) {  //url can http:// or /mnt/sdcard/mnt/ etc etc  //some lenghty code check if exists physically on phone. else.... forcedownload(url, imageview, rowid, db,pb);  private void forcedownload(string url, imageview imageview, int rowid,         testdbadapter db,progressbar pb) {      bitmapdownloadertask task = new bitmapdownloadertask(imageview, rowid,             db,pb); 

asynctask class in imagedownloader class

class bitmapdownloadertask extends asynctask<string, void, bitmap> {     private string url;     private int rowid;     private testdbadapter db;     private progressbar pb;     private final weakreference<imageview> imageviewreference;           public bitmapdownloadertask(imageview imageview, int rowid,             testdbadapter db,progressbar pb) {         imageviewreference = new weakreference<imageview>(imageview);         this.rowid = rowid;         this.db = db;                    this.pb = pb;     }       @override     protected void onpreexecute() {         // todo auto-generated method stub         pb.setvisibility(view.visible);     }      @override     protected bitmap doinbackground(string... params) {                  url = params[0];         return downloadbitmap(url);     }      @override     protected void onpostexecute(bitmap bitmap) {          if (iscancelled()) {             bitmap = null;         }          if (imageviewreference != null) {             imageview imageview = imageviewreference.get();             bitmapdownloadertask bitmapdownloadertask = getbitmapdownloadertask(imageview);              if ((this == bitmapdownloadertask)) {                 int pos = url.lastindexof("/");                 string filename = url.substring(pos, url.length());                 system.out.println(filename);                  string extloc = environment.getexternalstoragedirectory()                         + "/test";                  file folder = new file(extloc);                 if (!folder.exists()) {                     folder.mkdir();                 }                  try {                     fileoutputstream out = new fileoutputstream(extloc                             + filename);                       boolean result = db.updatemessageurl(rowid, extloc + filename); //should update cursor here, purpose change url link physical location on phone.                      bitmap.compress(bitmap.compressformat.jpeg, 95, out);                      bitmapfactory.options options = new bitmapfactory.options();                     options.intempstorage = new byte[24 * 1024];                     options.injustdecodebounds = false;                     options.insamplesize = 2;                      bitmap thumbnail = bitmapfactory.decodefile(extloc                             + filename, options);                       imageview.setimagebitmap(bitmap);                      addbitmaptocache(url, bitmap);                      pb.setvisibility(view.gone);                  } catch (exception e) {                     e.printstacktrace();                 }             }         }     } 

ok if looks weird, i'm hiding names.

first do:

c.movetofirst(); 

before access data rest want. in case call c.movetofirst(), not in getview() outside, since you'll same, because getview() called multiple times when performs populating. perhaps, call in method returning cursor.

when accessing, dont forget move cursor next data c.movetonext(); must inside getview();