media - android scanning all .mp3 files in SD Card -


i'm trying scan .mp3 files in sd card , save name. here fragment of code responsible that. 1.what i'm doing wrong? 1. correct path sd card /mnt/sdcard or /sdcard ?

public class playeractivity extends activity {      public void oncreate(bundle savedinstancestate)     {          super.oncreate(savedinstancestate);          setcontentview(r.layout.player_activity);      }     public class songsmanager      {         // sdcard path         //final string media_path = new string(mediastore.audio.media.getcontenturi("external").tostring());         private arraylist<hashmap<string, string>> songslist = new arraylist<hashmap<string, string>>();          public songsmanager()         {          }          public arraylist<hashmap<string, string>> getplaylist()         {          //   file home = new file(media_path);             file home = environment.getexternalstoragedirectory();              if (home.listfiles(new fileextensionfilter()).length > 0)              {                  (file file : home.listfiles(new fileextensionfilter()))                  {                     hashmap<string, string> song = new hashmap<string, string>();                     song.put("songtitle", file.getname().substring(0, (file.getname().length() - 4)));                     song.put("songpath", file.getpath());                      // adding each song songlist                     songslist.add(song);                  }             }             // return songs list array             return songslist;          }           class fileextensionfilter implements filenamefilter          {             public boolean accept(file dir, string name)              {                 return (name.endswith(".mp3") || name.endswith(".mp3"));             }         }      } }

thanks in advance.

try code snippet

final string media_path = environment.getexternalstoragedirectory()         .getpath() + "/"; private arraylist<hashmap<string, string>> songslist = new arraylist<hashmap<string, string>>(); private string mp3pattern = ".mp3";  // constructor public songsmanager() {  }  /**  * function read mp3 files , store details in  * arraylist  * */ public arraylist<hashmap<string, string>> getplaylist() {     system.out.println(media_path);     if (media_path != null) {         file home = new file(media_path);         file[] listfiles = home.listfiles();         if (listfiles != null && listfiles.length > 0) {             (file file : listfiles) {                 system.out.println(file.getabsolutepath());                 if (file.isdirectory()) {                     scandirectory(file);                 } else {                     addsongtolist(file);                 }             }         }     }     // return songs list array     return songslist; }  private void scandirectory(file directory) {     if (directory != null) {         file[] listfiles = directory.listfiles();         if (listfiles != null && listfiles.length > 0) {             (file file : listfiles) {                 if (file.isdirectory()) {                     scandirectory(file);                 } else {                     addsongtolist(file);                 }              }         }     } }  private void addsongtolist(file song) {     if (song.getname().endswith(mp3pattern)) {         hashmap<string, string> songmap = new hashmap<string, string>();         songmap.put("songtitle",                 song.getname().substring(0, (song.getname().length() - 4)));         songmap.put("songpath", song.getpath());          // adding each song songlist         songslist.add(songmap);     } }

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