Android copy from assets to files directory -


hi have a collection of json files in assets/data/ folder on launch want check see if files exists in internal files directory if of them dont exist want copy them assets/data/ folder internal storage files directory. @ moment i'm detecting if files exist or not struggling copy them assets. know how achieve this?

heres have tried far

public static void loaddata(context context){          keydata[] = {"1","2","3","4","5","6"}     jsonarray exists = new jsonarray();     log.v("data", "keydata = " + keydata);     log.v("data", "keydata.length = " + keydata.length);          (string directory : keydata ) {               file file = new file(directory);                if(file.exists() && file.isdirectory()){                    exists.put("true");                } else {                    exists.put("false");                }         }      log.v("data", "exists = " + exists);     if(exists.tostring().contains("false")){          for(int i=0; < keydata.length; i++){             string filename = keydata[i];             copyfilefromassetstointernalstorage(context,filename);         }        } }       public static void copyfilefromassetstointernalstorage(context context,string filename){       string destinationfile = context.getfilesdir().getpath() + file.separator + filename;      if (!new file(destinationfile).exists()) {        try {          copyfromassetstostorage(context, "data/" + filename, destinationfile);        } catch (ioexception e) {          // todo auto-generated catch block          e.printstacktrace();        }      }  }        private static void copyfromassetstostorage(context context, string sourcefile, string destinationfile) throws ioexception {        inputstream = context.getassets().open(sourcefile);        outputstream os = new fileoutputstream(destinationfile);        copystream(is, os);        os.flush();        os.close();        is.close();      }      private static void copystream(inputstream input, outputstream output) throws ioexception {        byte[] buffer = new byte[5120];        int length = input.read(buffer);        while (length > 0) {          output.write(buffer, 0, length);          length = input.read(buffer);        }      }    public final static void writedatatofile(context activitycontext, string writablestring, string filename){          fileoutputstream fos=null;         try {             fos=activitycontext.openfileoutput(filename, 0);             activitycontext.getfilesdir();             fos.write(writablestring.getbytes());           } catch (filenotfoundexception e) {              log.e("createfile", e.getlocalizedmessage());         }         catch (ioexception e) {              log.e("createfile", e.getlocalizedmessage());         }          finally{             if(fos!=null){                 try {                     // drain stream                     fos.flush();                     fos.close();                 } catch (ioexception e) {                     // todo auto-generated catch block                     e.printstacktrace();                 }             }         }      }


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