database - Backup/Restore to sdcard in Android -

i'm trying backup/restore app database external sdcard preferences activity. able save database external sdcard, don't understand how can transfer file default path (data\package.app\databases). idea?

i this:

export:

inputstream myinput;             string dbpath = "/data/"+pckgname+"/databases/refuel_db";             string sdpath = environment.getexternalstoragedirectory().getpath();              try {                  myinput = new fileinputstream(environment.getdatadirectory()                         + dbpath);                   // set output folder on scard                 file directory = new file(sdpath + "/refuel");                 // create folder if doesn't exist:                 if (!directory.exists()) {                     directory.mkdirs();                 }                 // set output file stream up:                  outputstream myoutput = new fileoutputstream(directory.getpath()                         + "/refuel_db");                  // transfer bytes input file output file                 byte[] buffer = new byte[1024];                 int length;                 while ((length = myinput.read(buffer)) > 0) {                     myoutput.write(buffer, 0, length);                 }                 // close , clear streams                  myoutput.flush();                  myoutput.close();                  myinput.close();                  toast.maketext(getactivity(), "backup done succesfully!", toast.length_long)                         .show();              } catch (filenotfoundexception e) {                 toast.maketext(getactivity(), "error " + e, toast.length_long).show();                  // todo auto-generated catch block                 e.printstacktrace();             } catch (ioexception e) {                 toast.maketext(getactivity(), "error " + e, toast.length_long).show();                  // todo auto-generated catch block                 e.printstacktrace();             } 

import:

 outputstream myoutput;              string dbpath = "/data/"+pckgname+"/databases/refuel_db";             string sdpath = environment.getexternalstoragedirectory().getpath();              try {                  myoutput = new fileoutputstream(environment.getdatadirectory()                         + dbpath);                  // set folder on sdcard                 file directory = new file(sdpath + "/refuel");                 // set input file stream up:                  inputstream myinputs = new fileinputstream(directory.getpath()                         + "/refuel_db");                  // transfer bytes input file output file                 byte[] buffer = new byte[1024];                 int length;                 while ((length = myinputs.read(buffer)) > 0) {                     myoutput.write(buffer, 0, length);                 }                  // close , clear streams                 myoutput.flush();                  myoutput.close();                  myinputs.close();                  toast.maketext(getactivity(), "import done succesfully!", toast.length_long)                         .show();              } catch (filenotfoundexception e) {                 toast.maketext(getactivity(), "error " + e, toast.length_long).show();                  // todo auto-generated catch block                 e.printstacktrace();             } catch (ioexception e) {                 toast.maketext(getactivity(), "error " + e, toast.length_long).show();                  // todo auto-generated catch block                 e.printstacktrace();             }