how to save a file in android, ENOENT IOexception -

how save file in android? have following code:

 final file file = new file(cont.getexternalfilesdir(null), filename);                 if (!file.exists()) {                     file.createnewfile();                 } 

and

03-21 11:31:29.903: w/system.err(31668): java.io.ioexception: open failed: enoent (no such file or directory) 03-21 11:31:29.903: w/system.err(31668):    @ java.io.file.createnewfile(file.java:948) 

exception complete code saving of file following:

final file file = new file(context.getexternalfilesdir(null), filename);             if (!file.exists()) {                 // file.mkdirs();                 file.createnewfile();             }             final outputstream output = new fileoutputstream(file);             try {                 try {                     final byte[] buffer = new byte[1024];                     int read;                     while ((read = input.read(buffer)) != -1)                         output.write(buffer, 0, read);                     output.flush();                 } {                     output.close();                 }                 log.i("save_file", "save disk ok");             } catch (exception e) {                 e.printstacktrace();             } 

i have permissions:

<uses-permission android:name="android.permission.read_external_storage" /> <uses-permission android:name="android.permission.write_external_storage" /> 

can 1 please point out i'm doing wrong, thanks

edited: problem name of file wanted save, shouldn't contain restricted chars, mine in format:"xxx/xxx.jpg" '/' not valid char file name. thanks

better use environment.getexternalstoragedirectory() instead of context.getexternalfilesdir(null) though seems same.

here code:

string extr = environment.getexternalstoragedirectory().tostring();         file mfolder = new file(extr + "/mainfolder_photo");          if (!mfolder.exists()) {             mfolder.mkdir();         }          string strf = mfolder.getabsolutepath();         msubfolder = new file(strf + "/pictures");          if (!msubfolder.exists()) {             msubfolder.mkdir();         }           // check file there or not;// if present delete          try {           file yourdir = new file(msubfolder.getabsolutefile().tostring());         (file f : yourdir.listfiles()) {              if (f.length()>0){          f.delete();              }          }         } catch (exception e) {             // todo: handle exception         }         // file name         string s = "puzzle_photo.png";          file f = new file(msubfolder.getabsolutepath(), s);          strmyimagepath = f.getabsolutepath();          outputstream output;         try {             output = new fileoutputstream(f);             url url = new url("file://" + filepath);// data             inputstream input = url.openstream();             byte[] buffer = new byte[1024];             int bytesread = 0;             while ((bytesread = input.read(buffer, 0, buffer.length)) >= 0) {                 output.write(buffer, 0, bytesread);             }              output.close();             input.close();              return true;          } catch (exception e) {              e.printstacktrace();         }