Saving a spinner position to a text file [Android] -

i'm trying save selected location of spinner in text file when click save button.

currently have. spinner works fine when try add part save spinner position (savesettings) problems lie.

i getting following errors:

error:(56, 85) error: incompatible types: string cannot converted file  error:(61, 40) error: method getposition in class arrayadapter<t> cannot applied given types; required: charsequence found: no arguments reason: actual , formal argument lists differ in length t type-variable: t extends object declared in class arrayadapter 

error:execution failed task ':app:compiledebugjavawithjavac'.

compilation failed; see compiler error output details.

i think problem tried combine 2 different approaches i'm still learning i'm confusing myself correct method saving selected spinner position.

public class mainactivity extends appcompatactivity {     spinner spinner;     arrayadapter<charsequence> adapter;     string selectedserver;      /**     * attention: auto-generated implement app indexing api.     * see https://g.co/appindexing/androidstudio more information.     */     private googleapiclient client;      @override     protected void oncreate(bundle savedinstancestate) {         super.oncreate(savedinstancestate);         setcontentview(r.layout.activity_main);          spinner = (spinner) findviewbyid(r.id.spinner);         adapter = arrayadapter.createfromresource(this, r.array.serverurl, android.r.layout.simple_spinner_item);         adapter.setdropdownviewresource(android.r.layout.simple_spinner_dropdown_item);         spinner.setadapter(adapter);         spinner.setonitemselectedlistener(new adapterview.onitemselectedlistener() {             @override             public void onitemselected(adapterview<?> parent, view view, int position, long id) {                  selectedserver = parent.getitematposition(position).tostring();              }              @override             public void onnothingselected(adapterview<?> parent) {              }           });     }      public void savesettings(view view) {          file txtfolder = new file(environment.getexternalstoragedirectory().getabsolutepath()+"/myfolder/");         if (!txtfolder.exists()) {             txtfolder.mkdir();         }         file file = new file(txtfolder, "setting.txt");         string.valueof(selectedserver.getbytes());         try {             fileoutputstream fos = new fileoutputstream(file);             fos.write(selectedserver.getbytes());             fos.close();             toast.maketext(getapplicationcontext(),"setting saved", toast.length_long).show();         } catch (filenotfoundexception e) {             e.printstacktrace();         } catch (ioexception e) {             e.printstacktrace();         }      } } 

so looking in fixing problem. advice appreciated.

dave

this line first error:

file txtfolder = environment.getexternalstoragedirectory().getabsolutepath()+"/myfolder/"; 

you assigning string value file. might wanna put value in constructor new file(string path):

file txtfolder = new file(environment.getexternalstoragedirectory().getabsolutepath()+"/myfolder/"); 

the second error this:

string selectedserver = adapter.getposition().tostring(); 

i use string.valueof(adapter.getposition()); or implicit conversion ""+adapter.getposition();.

if that's not case, need check getposition returns (maybe it's empty).