android - How to filter a list view based on JSON data and filter parameters? -
i trying create listview filter in android.
we have 2 drop-downs, role , gender, , 1 search button.
when user clicks search button, want show data related selected drop down values only.
for example, if select "engineer" , "male" "role" , "gender" respectively, should show data have engineer in "role" , male in "gender".
from following json file, record should shown "bhargav".
{ "contacts": [ { "id": "c200", "name": "bhargav", "email": "ab@gmail.com", "address": "xx-xx-xxxx,x - street, x - country", "gender" : "male", "role" : "engineer", "phone": { "mobile": "+91 0000000000", "home": "00 000000", "office": "00 000000" } }, { "id": "c201", "name": "johnny", "email": "johnny@gmail.com", "address": "xx-xx-xxxx,x - street, x - country", "gender" : "female", "role" : "charteredaccountant", "phone": { "mobile": "+91 0000000000", "home": "00 000000", "office": "00 000000" } }, { "id": "c202", "name": "leonardo dicaprio", "email": "leonardo_dicaprio@gmail.com", "address": "xx-xx-xxxx,x - street, x - country", "gender" : "male", "role" : "doctor", "phone": { "mobile": "+91 0000000000", "home": "00 000000", "office": "00 000000" } } ] } this code
public class mainactivity extends listactivity { private progressdialog pdialog; // url contacts json private static string url = "http://api.examplesite.com/contacts/"; // json node names private static final string tag_contacts = "contacts"; private static final string tag_id = "id"; private static final string tag_name = "name"; private static final string tag_email = "email"; private static final string tag_address = "address"; private static final string tag_gender = "gender"; private static final string tag_role = "role"; private static final string tag_phone = "phone"; private static final string tag_phone_mobile = "mobile"; private static final string tag_phone_home = "home"; private static final string tag_phone_office = "office"; // contacts jsonarray jsonarray contacts = null; // hashmap listview arraylist<hashmap<string, string>> contactlist; @override public void oncreate(bundle savedinstancestate) { super.oncreate(savedinstancestate); setcontentview(r.layout.activity_main); contactlist = new arraylist<hashmap<string, string>>(); listview lv = getlistview(); // listview on item click listener lv.setonitemclicklistener(new onitemclicklistener() { @override public void onitemclick(adapterview<?> parent, view view, int position, long id) { // getting values selected listitem string name = ((textview) view.findviewbyid(r.id.name)) .gettext().tostring(); string cost = ((textview) view.findviewbyid(r.id.email)) .gettext().tostring(); string description = ((textview) view.findviewbyid(r.id.mobile)) .gettext().tostring(); // starting single contact activity intent in = new intent(getapplicationcontext(), singlecontactactivity.class); in.putextra(tag_name, name); in.putextra(tag_email, cost); in.putextra(tag_phone_mobile, description); startactivity(in); } }); // calling async task json new getcontacts().execute(); } /** * async task class json making http call * */ private class getcontacts extends asynctask<void, void, void> { @override protected void onpreexecute() { super.onpreexecute(); // showing progress dialog pdialog = new progressdialog(mainactivity.this); pdialog.setmessage("please wait..."); pdialog.setcancelable(false); pdialog.show(); } @override protected void doinbackground(void... arg0) { // creating service handler class instance servicehandler sh = new servicehandler(); // making request url , getting response string jsonstr = sh.makeservicecall(url, servicehandler.get); log.d("response: ", "> " + jsonstr); if (jsonstr != null) { try { jsonobject jsonobj = new jsonobject(jsonstr); // getting json array node contacts = jsonobj.getjsonarray(tag_contacts); // looping through contacts (int = 0; < contacts.length(); i++) { jsonobject c = contacts.getjsonobject(i); string id = c.getstring(tag_id); string name = c.getstring(tag_name); string email = c.getstring(tag_email); string address = c.getstring(tag_address); string gender = c.getstring(tag_gender); string role = c.getstring(tag_role); // phone node json object jsonobject phone = c.getjsonobject(tag_phone); string mobile = phone.getstring(tag_phone_mobile); string home = phone.getstring(tag_phone_home); string office = phone.getstring(tag_phone_office); // tmp hashmap single contact hashmap<string, string> contact = new hashmap<string, string>(); // adding each child node hashmap key => value contact.put(tag_id, id); contact.put(tag_name, name); contact.put(tag_email, email); contact.put(tag_phone_mobile, mobile); // adding contact contact list contactlist.add(contact); } } catch (jsonexception e) { e.printstacktrace(); } } else { log.e("servicehandler", "couldn't data url"); } return null; } @override protected void onpostexecute(void result) { super.onpostexecute(result); // dismiss progress dialog if (pdialog.isshowing()) pdialog.dismiss(); /** * updating parsed json data listview * */ listadapter adapter = new simpleadapter( mainactivity.this, contactlist, r.layout.list_item, new string[] { tag_name, tag_email, tag_phone_mobile }, new int[] { r.id.name, r.id.email, r.id.mobile }); setlistadapter(adapter); } } } it not working intended.
what wrong? how can implement properly?
you can set if condition in loop getting datas json , set in adapter below...
// looping through contacts (int = 0; < contacts.length(); i++) { jsonobject c = contacts.getjsonobject(i); if(c.getstring(tag_gender).equalsignorecase((string) role.getselecteditem()) && c.getstring(tag_role).equalsignorecase((string) gender.getselecteditem())) { string id = c.getstring(tag_id); string name = c.getstring(tag_name); string email = c.getstring(tag_email); string address = c.getstring(tag_address); string gender = c.getstring(tag_gender); string role = c.getstring(tag_role); // phone node json object jsonobject phone = c.getjsonobject(tag_phone); string mobile = phone.getstring(tag_phone_mobile); string home = phone.getstring(tag_phone_home); string office = phone.getstring(tag_phone_office); // tmp hashmap single contact hashmap<string, string> contact = new hashmap<string, string>(); // adding each child node hashmap key => value contact.put(tag_id, id); contact.put(tag_name, name); contact.put(tag_email, email); contact.put(tag_phone_mobile, mobile); // adding contact contact list contactlist.add(contact); } }
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