java - How to show IDs of objects in ArrayList -

java - How to show IDs of objects in ArrayList -

i have little application can write random stuff , save in sqllite database file. activity read informations , show in arraylist. created button delete first object of list. i'm trying alter bit user can take object deleted. , it's working great well. problem don't know how show ids of objects list on screen. can @ code , help me?

oncreate in activity shows list:

dbwrapper = new mydatabasewrapper(this); dbwrapper.open(); mycontactslist = dbwrapper.getallcontacts(); this.setlistadapter(new arrayadapter<mycontact>(this, android.r.layout.simple_list_item_1, mycontactslist));

getallcontacts function mydatabasewrapper:

public list<mycontact> getallcontacts() { list<mycontact> mylist = new arraylist<mycontact>(); cursor c = db.rawquery("select * " + contacts_table, null); c.movetofirst(); while (!c.isafterlast()) { mycontact mc = new mycontact(); mc.setdata(c.getint(0), c.getstring(1), c.getstring(2), c.getstring(3)); c.movetonext(); mylist.add(mc); } c.close(); homecoming mylist; }

and class convert values database string:

package com.example.sqlite; import java.util.arraylist; import java.util.list; public class mycontact { string imie; string nazwisko; string tel; int id; public mycontact() { // todo auto-generated constructor stub } public void setdata(int _id, string i, string n, string t){ id=_id; imie=i; nazwisko=n; tel=t; } @override public string tostring() { homecoming "[" + string.valueof(id) + "]" + "\n" + imie + "\n" + nazwisko + "\n" + tel; } public int getid() { homecoming id; } }

it looks that: http://screenshooter.net/100009676/chxmipm http://screenshooter.net/100009676/ngbxmgx

i deleted 1 object number 3.

so yeah. far number in "[ ]" id database. want alter number id of object.

i don't much android dev apologize may not understand this, why can't utilize indexof(object o)? wouldn't plenty id of given element, long know element itself? (which, assuming want delete it, would)

java android arraylist