android - Some help understanding columnIndex in ViewBInder -

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the android app i'm building has simple table 3 columns:

_id integer primary key..., name text, color int

this table called categories. load categories database , feed them simplecursoradapter use spinner so:

string[] = new string[] {         listdbadapter.key_category_name,         listdbadapter.key_category_color }; int[] = new int[] { r.id.categoryspinneritem };  mcategoryspinneradapter = new simplecursoradapter(this,     r.layout.category_spinner_item, categorycursor, from, to);  mcategoryspinneradapter     .setviewbinder(new categoryspinnerviewbinder()); mcategoryspinner.setadapter(mcategoryspinneradapter); 

i set custom viewbinder because want category name text of spinner item, , color background color. viewbinder looks this:

private static final int name_column = 1; private static final int color_column = 2;  @override public boolean setviewvalue(view view, cursor cursor, int columnindex) {      textview textview = (textview) view;      string name = cursor.getstring(name_column);     int color = cursor.getint(color_column);      textview.settext(name);     textview.setbackgroundcolor(color);      return true; } 

here question (finally)

in setviewvalue method, columnindex supposed doing? documentation says "the column @ data can found in cursor" when debug through setviewvalue hit 3 times , columnindex 1.

i expecting debugger setviewvalue once each entry in array, columnindex first of 1 , 2. or maybe once each column in query results.

the above code works, can desired functionality because of name_column , color_column constants. i'd interested hear explanation of setviewvalue , parameters more experienced custom viewbinders.

in source of simplecursoradapter, setviewvalue called in bindview :

bound = binder.setviewvalue(v, cursor, from[i]); 

where third param from[i], interesting one, iteration on int[], represents column indexes used. index [i] iteration comes int[] to passed constructor of adapter, , in case, has 1 item - r.id.categoryspinneritem

edit: in 2 words, string[] , int[] should equivalent, same size , in same order - each column name need int r.id... first view id connected first column id from[0], second from[1] , on, , if pass 10 columns, have 3 r.id-s, from[2] :)