android - Add new string to resource string array dynamically -

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im making workout log , want ther user able add new exercise types.

i made string array in resources , spinner take strings string array in resources.

im not sure how add new string resources string array java code. tried code, exception.

thanks helping :)

public void onclick(view v) {      switch(v.getid()){      case r.id.setnewexercise:         string[] exercisestringarray = getresources().getstringarray(r.array.exercisetypes);         arrayadapter<charsequence> list = arrayadapter.createfromresource(this, r.array.exercisetypes, android.r.layout.simple_list_item_1);          string exercisecheck = addnewexercise.gettext().tostring();         try{         (int = 0; < exercisestringarray.length; i++)         {             if (exercisecheck.equals(exercisestringarray[i]))             {                 toast.maketext(getapplicationcontext(), "this exercise exist", toast.length_long).show();                 break;             }             else if (i == exercisestringarray.length - 1 && exercisecheck.equals(exercisestringarray[i]) == false)             {                 list.add(exercisecheck);                 toast.maketext(getapplicationcontext(), "added successfully", toast.length_long).show();                 break;             }         }         }catch(exception e){              toast.maketext(getapplicationcontext(), "wtf", toast.length_long).show();         }      }  }

ive tried code, , spinner loaded empty , force closed when trying save new string.

    /////////////////////exercise spinner/////////////////////     // create arrayadapter using string array , default spinner layout     list = new arraylist<charsequence>();     exerciseadapter = new arrayadapter<charsequence>(this, r.array.exercisetypes, list);      // specify layout use when list of choices appears     exerciseadapter.setdropdownviewresource(android.r.layout.simple_spinner_dropdown_item);      // apply adapter spinner     workoutchoose.setadapter(exerciseadapter);   }  @override public void onclick(view v) {      switch(v.getid()){      case r.id.setnewexercise:           string exercisecheck = addnewexercise.gettext().tostring();          try{              if (exerciseadapter.getposition(exercisecheck) >= 0)             {                 toast.maketext(getapplicationcontext(), "this exercise exist", toast.length_long).show();                 break;             }             else              {                 exerciseadapter.add(exercisecheck);                 exerciseadapter.notifydatasetchanged();                  toast.maketext(getapplicationcontext(), "added successfully", toast.length_long).show();                 break;             }         }         catch(exception e){              toast.maketext(getapplicationcontext(), "wtf", toast.length_long).show();         }      }  }

you cannot modify resources themselves. welcome convert string[] arraylist<string> , add in additional strings, obtained elsewhere (e.g., file, database, sharedpreferences) if wish.

add() on arrayadapter works if arrayadapter made arraylist, not java array ([]), java array's size cannot changed @ runtime.


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