android - How to extract data from mysql for listview in tab? -
i had created activity class , fragments each of listview. each tab display list of items according category in tab.
activity class:
public class displaypostitem extends fragmentactivity implements actionbar.tablistener { private static final string state_selected_navigation_item = "selected_navigation_item"; @override public void oncreate(bundle savedinstancestate) { super.oncreate(savedinstancestate); setcontentview(r.layout.activity_display_post_item); // set action bar. final actionbar actionbar = getactionbar(); actionbar.setnavigationmode(actionbar.navigation_mode_tabs); // each of sections in app, add tab action bar. actionbar.addtab(actionbar.newtab().settext("books").settablistener(this)); actionbar.addtab(actionbar.newtab().settext("lab coat").settablistener(this)); actionbar.addtab(actionbar.newtab().settext("tools").settablistener(this)); actionbar.addtab(actionbar.newtab().settext("others").settablistener(this)); } @override public void onrestoreinstancestate(bundle savedinstancestate) { if (savedinstancestate.containskey(state_selected_navigation_item)) { getactionbar().setselectednavigationitem(savedinstancestate.getint(state_selected_navigation_item)); } } @override public void onsaveinstancestate(bundle outstate) { outstate.putint(state_selected_navigation_item, getactionbar().getselectednavigationindex()); } @override public boolean oncreateoptionsmenu(menu menu) { getmenuinflater().inflate(r.menu.display_post_item, menu); return true; } @override public void ontabunselected(actionbar.tab tab, fragmenttransaction fragmenttransaction) { } @override public void ontabselected(actionbar.tab tab, fragmenttransaction fragmenttransaction) { /** * on first tab show our list */ if (tab.getposition() == 0) { booksfragment booklist = new booksfragment(); getsupportfragmentmanager().begintransaction().replace(r.id.container, booklist).commit(); } else if (tab.getposition() == 1) { coatfragment coatlist = new coatfragment(); getsupportfragmentmanager().begintransaction().replace(r.id.container, coatlist).commit(); } else if (tab.getposition() == 2) { toolfragment toollist = new toolfragment(); getsupportfragmentmanager().begintransaction().replace(r.id.container, toollist).commit(); } else { otherfragment otherlist = new otherfragment(); getsupportfragmentmanager().begintransaction().replace(r.id.container, otherlist).commit(); } } @override public void ontabreselected(actionbar.tab tab, fragmenttransaction fragmenttransaction) { } /** * dummy fragment representing section of app, displays dummy text. */ public static class dummysectionfragment extends fragment { public dummysectionfragment() { } public static final string arg_section_number = "section_number"; @override public view oncreateview(layoutinflater inflater, viewgroup container, bundle savedinstancestate) { textview textview = new textview(getactivity()); textview.setgravity(gravity.center); bundle args = getarguments(); textview.settext(integer.tostring(args.getint(arg_section_number))); return textview; } } } --edit--
is right way information mysql? code below has several errors.
fragment class:
public class booksfragment extends listfragment { // progress dialog private progressdialog pdialog; // creating json parser object jsonparser jparser = new jsonparser(); jsonobject json; arraylist<products> productslist = new arraylist<products>(); // url products list private static string url_all_products = "http://10.0.2.2:8000/project/display_items.php"; // json node names private static final string tag_success = "success"; private static final string tag_products = "product"; private static final string tag_pid = "pid"; private static final string tag_name = "name"; private static final string tag_budget = "price"; private static final string tag_des = "description"; private static final string tag_date_posted = "created_at"; private static final string tag_category = "category"; private static final string tag_email = "email"; private static final string tag_contact = "contact"; // products jsonarray jsonarray products = null; @override public void oncreate(bundle savedinstancestate) { super.oncreate(savedinstancestate); listadapter listadapter = new arrayadapter<string>(getactivity(), android.r.layout.simple_list_item_1, books); setlistadapter(listadapter); // hashmap listview productslist = new arraylist<products>(); // loading products in background thread new loadallproducts().execute(); } @override public view oncreateview(layoutinflater inflater, viewgroup container, bundle savedinstancestate) { return inflater.inflate(r.layout.list_fragment, container, false); listview lv = getlistview(); // on seleting single product // launching edit product screen lv.setonitemclicklistener(new onitemclicklistener() { @override public void onitemclick(adapterview<?> parent, view view, int position, long id) { // getting values selected listitem string pid = ((textview) view.findviewbyid(r.id.pid)).gettext() .tostring(); string name = ((textview) view.findviewbyid(r.id.name)) .gettext().tostring(); string description = ((textview) view.findviewbyid(r.id.des)) .gettext().tostring(); string price = ((textview) view.findviewbyid(r.id.budget)) .gettext().tostring(); string date = ((textview) view.findviewbyid(r.id.date_posted)) .gettext().tostring(); string category = ((textview) view.findviewbyid(r.id.category)) .gettext().tostring(); string email = ((textview) view .findviewbyid(r.id.email_request)).gettext().tostring(); string contact = ((textview) view .findviewbyid(r.id.contact_request)).gettext() .tostring(); // starting new intent intent in = new intent(getapplicationcontext(), displayiteminfo.class); // sending information next activity in.putextra(tag_pid, pid); in.putextra(tag_name, name); in.putextra(tag_des, description); in.putextra(tag_budget, price); in.putextra(tag_date_posted, date); in.putextra(tag_category, category); in.putextra(tag_email, email); in.putextra(tag_contact, contact); startactivity(in); } }); } class loadallproducts extends asynctask<string, string, string> { /** * before starting background thread show progress dialog * */ @override protected void onpreexecute() { super.onpreexecute(); pdialog = new progressdialog(booksfragment.this); pdialog.setmessage("loading products. please wait..."); pdialog.setindeterminate(false); pdialog.setcancelable(false); pdialog.show(); } /** * getting products url * */ protected string doinbackground(string... args) { // building parameters list<namevaluepair> params = new arraylist<namevaluepair>(); intent intent = getintent(); // getting attached intent data string jsons = intent.getstringextra("json"); if (jsons == null) { // getting json string url json = jparser.makehttprequest(url_all_products, "get", params); } else { try { jsonobject jsonobj = new jsonobject(jsons); json = jsonobj; } catch (jsonexception e) { // todo auto-generated catch block e.printstacktrace(); } } // check log cat json reponse log.d("all products: ", json.tostring()); try { // checking success tag int success = json.getint(tag_success); if (success == 1) { // products found // getting array of products products = json.getjsonarray(tag_products); // looping through products (int = 0; < products.length(); i++) { jsonobject c = products.getjsonobject(i); // storing each json item in variable string id = c.getstring(tag_pid); string name = c.getstring(tag_name); string budget = c.getstring(tag_budget); string description = c.getstring(tag_des); string category = c.getstring(tag_category); string contact = c.getstring(tag_contact); string email = c.getstring(tag_email); string date = c.getstring(tag_date_posted); if (category == "books") { // create new product obect, set values products mproduct = new products(); mproduct.pid = id; mproduct.name = name; mproduct.price = budget; mproduct.description = description; mproduct.date = date; mproduct.category = category; mproduct.email = email; mproduct.contact = contact; // adding product arraylist productslist.add(mproduct); } } } else { // no products found // launch add new product activity intent = new intent(getapplicationcontext(), mainmenu.class); // closing previous activities i.addflags(intent.flag_activity_clear_top); startactivity(i); } } catch (jsonexception e) { e.printstacktrace(); } return null; } /** * after completing background task dismiss progress dialog * **/ protected void onpostexecute(string file_url) { // dismiss dialog after getting products pdialog.dismiss(); if (productslist.size() > 0) { /** * updating parsed json data listview * */ customadapter adapter = new customadapter(getbasecontext(), productslist);// , if (getlistview() != null) { // updating listview setlistadapter(adapter); } else { log.d("listview-reference", "listview null"); } } else { log.d("product list", "products list empty"); } } } }
when select tab related of fragment class called have place populate listview code on oncreateview method because oncreate calling when fragment class set not called again , again oncreate view setup own fragment view called code in oncreateview method.
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