android - Im trying to display album art within the listview, but having issues -

im able display album art on playing screen, not through listview using same code, difference really, being run through adapter class, artist name , title display each item in list

listview class

 public void getsonglist() {     //query external audio     contentresolver musicresolver = getcontentresolver();     // uri musicuri = android.provider.mediastore.audio.media.external_content_uri;     string selection = mediastore.audio.media.is_music + "!=0";     string sortorder = mediastore.audio.media.default_sort_order;     cursor musiccursor = musicresolver.query(urimusicshow, null, selection, null, sortorder);      //iterate on results if valid     if (musiccursor != null && musiccursor.movetofirst()) {         //get columns         int titlecolumn = musiccursor.getcolumnindex                 (android.provider.mediastore.audio.media.title);         int idcolumn = musiccursor.getcolumnindex                 (android.provider.mediastore.audio.media._id);         int artistcolumn = musiccursor.getcolumnindex                 (android.provider.mediastore.audio.media.artist);         long albumid = musiccursor.getlong(musiccursor.getcolumnindexorthrow(mediastore.audio.media.album_id));         bitmap artwork=null;          uri sartworkuri = uri.parse("content://media/external/audio/albumart");         uri uri = contenturis.withappendedid(sartworkuri, albumid);           //add songs list         {             long thisid = musiccursor.getlong(idcolumn);             string thistitle = musiccursor.getstring(titlecolumn);             string thisartist = musiccursor.getstring(artistcolumn);              try {                 artwork = mediastore.images.media.getbitmap(musicresolver, uri);             } catch (ioexception e) {                 e.printstacktrace();             }              songlist.add(new song(thistitle, thisartist, thisid, artwork));         }         while (musiccursor.movetonext());     } } 

adapter class

public class songadapter extends baseadapter {  //song list , layout public arraylist<song> songs; private layoutinflater songinf;  //constructor public songadapter(context c, arraylist<song> thesongs){     songs=thesongs;     songinf= layoutinflater.from(c); }  @override public int getcount() {     return songs.size(); }  @override public object getitem(int arg0) {     return null; }  @override public long getitemid(int arg0) {     return 0; }   @override public view getview(int position, view convertview, viewgroup parent) {     //map song layout     relativelayout songlay = (relativelayout)songinf.inflate(r.layout.song_item, parent, false);     //get title , artist views     textview songview = (textview)songlay.findviewbyid(r.id.song_title);     textview artistview = (textview)songlay.findviewbyid(r.id.song_artist);  //   imageview albumview = (imageview)songlay.findviewbyid(r.id.album_cover);     //get song using position     song currsong = songs.get(position);     //get title , artist strings     songview.settext(currsong.gettitle());     artistview.settext(currsong.getartist());  //   albumview.setimagebitmap(currsong.getart());     //set position tag     songlay.settag(position);     return songlay; }} 

and separate class

public class song { private long id; private string title; private string artist; private bitmap art;   public song(string songtitle,string songartist,long songid, bitmap albumart){     id=songid;     title=songtitle;     artist=songartist;     art=albumart; }   public long getid(){return id;} public string gettitle(){return title;} public string getartist(){return artist;} public bitmap getart(){return art;}} 

im not sure why not displaying needs display, great, thank you