android - how to create .bin file on external storage -


i used lot of examples trying understand why doesnt create file didn't , need help.

file myfile = new file(environment.getexternalstoragepublicdirectory(environment.directory_downloads), "fffffffff.bin"); try {     myfile.createnewfile();     setoutputstream(new fileoutputstream(myfile));         (short = 1; <= this.array.length; i++) {             this.array[i-1] = new myobject(i);         }         get_objoutputstream().writeobject(this.array);         getoutputstream().close();     } catch (filenotfoundexception e) {         e.printstacktrace();     } catch (ioexception e) {         e.printstacktrace();     }

the getters/setters regular, worked when wrote internal file before changed little problem not error or related array of objects

thanks help

updates:

i got no errors, run , cant find file when im looking when plug phone pc after installing , running.

and yes did wrote premition, not problem

did add permission in manifest file?

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

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