android - arraylist is empty after adding values -
when execute program, shows blank screen , in logcat shows no adapter attached; skipping layout. when debug code arraylist not getting value (returning 0).
public class mainactivity extends appcompatactivity implements constants, networkoperation, url { linearlayoutmanager manager; arraylist<offermodal> bestoffers; recyclerviewadapter adapter; recyclerview rv; fetchdata fetchdata; @override protected void oncreate(bundle savedinstancestate) { super.oncreate(savedinstancestate); setcontentview(r.layout.activity_main); rv = (recyclerview) findviewbyid(r.id.recyclerview1); fetchdata = new fetchdata(this, this, cloud_section); fetchdata.fromserver(); manager = new linearlayoutmanager(getapplicationcontext(), linearlayoutmanager.vertical, false); rv.setlayoutmanager(new linearlayoutmanager(this)); } @override public void started() { } @override public void doingbackground() { } @override public void completed(jsonobject jsonobject) { bestoffers = new arraylist<offermodal>(); try { jsonarray array_item = new jsonarray(); (int = 0; < array_item.length(); i++) { jsonobject itemobj = array_item.getjsonobject(i); string id = itemobj.getstring(id); string le_id = itemobj.getstring(le_id); string title = itemobj.getstring(title); string description = itemobj.getstring(description); string wid = itemobj.getstring(wid); string hgt = itemobj.getstring(hgt); string tn_path = itemobj.getstring(tn_path); string create_time = itemobj.getstring(create_time); string update_time = itemobj.getstring(update_time); string view_count = itemobj.getstring(view_count); string slide_count = itemobj.getstring(slide_count); string shared = itemobj.getstring(shared); string publish_ver = itemobj.getstring(publish_ver); string publish_time = itemobj.getstring(publish_time); string user_name = itemobj.getstring(user_name); string avatar_path = itemobj.getstring(avatar_path); string comment_count = itemobj.getstring(comment_count); string fav = itemobj.getstring(fav); string fav_count = itemobj.getstring(fav_count); offermodal off = new offermodal(id, le_id, title, description, wid, hgt, tn_path, create_time, update_time, view_count, slide_count, shared, publish_ver, publish_time, user_name, avatar_path, comment_count, fav, fav_count); off.setid(id); off.setid(le_id); off.settitle(title); off.setdescription(description); off.sethgt(hgt); off.settn_path(tn_path); off.setcreate_time(create_time); off.setupdate_time(update_time); off.setview_count(view_count); off.setslide_count(slide_count); off.setshared(shared); off.setpublish_ver(publish_ver); off.setpublish_time(publish_time); off.setuser_name(user_name); off.setavatar_path(avatar_path); off.setcomment_count(comment_count); off.setfav(fav); off.setfav_count(fav_count); bestoffers.add(off); } } catch (jsonexception e) { e.printstacktrace(); } adapter = new recyclerviewadapter(getapplicationcontext(), bestoffers); rv.setadapter(adapter); } } this json data:
[ { "id": "42057", "le_id": "568fb0d29a5eb", "title": "bag big deal lulu hypermarket", "description": "", "wid": "0", "hgt": "0", "tn_path": "", "create_time": "1452257490", "update_time": "1452332748", "view_count": "00000000669", "slide_count": "9", "shared": "f", "publish_ver": "11", "publish_time": "1452332761", "user_name": " lulu retail", "avatar_path": null, "comment_count": "0", "fav": "f", "fav_count": 0 }, { "id": "42019", "le_id": "568f9e45625da", "title": "bag big deal lulu fashion store", "description": "", "wid": "0", "hgt": "0", "tn_path": "", "create_time": "1452252741", "update_time": "1452584969", "view_count": "00000000659", "slide_count": "1", "shared": "f", "publish_ver": "5", "publish_time": "1452584972", "user_name": " lulu retail", "avatar_path": null, "comment_count": "0", "fav": "f", "fav_count": 0 }, { "id": "42017", "le_id": "568f9e30df0da", "title": "bag big deal lulu connect", "description": "", "wid": "0", "hgt": "0", "tn_path": "", "create_time": "1452252720", "update_time": "1452585162", "view_count": "00000000726", "slide_count": "7", "shared": "f", "publish_ver": "7", "publish_time": "1452275301", "user_name": " lulu retail", "avatar_path": null, "comment_count": "0", "fav": "f", "fav_count": 0 } ] this adapter class:
public class recyclerviewadapter extends recyclerview.adapter<recyclerviewholder> { arraylist<offermodal> mbestoffers; context context; // list<offers>card_items; requestqueue mrequestqueue; imageloader mimageloader; public recyclerviewadapter(context context, arraylist<offermodal> mbestoffers) { this.context = context; // this.card_items = card_items; this.mbestoffers = mbestoffers; mrequestqueue = volley.newrequestqueue(context); mimageloader = new imageloader(mrequestqueue, new imageloader.imagecache() { private final lrucache<string, bitmap> mcache = new lrucache<string, bitmap>(10); public void putbitmap(string url, bitmap bitmap) { mcache.put(url, bitmap); } public bitmap getbitmap(string url) { return mcache.get(url); } }); } @override public recyclerviewholder oncreateviewholder(viewgroup parent, int viewtype) { view view = layoutinflater.from(parent.getcontext()).inflate(r.layout.cardlayout, null); recyclerviewholder rvh = new recyclerviewholder(view); return rvh; } @override public void onbindviewholder(recyclerviewholder holder, int position) { // holder.imageview.setimageurl(mbestoffers.get(position).getavatar_path(), mimageloader); holder.tv1.settext(mbestoffers.get(position).gettitle()); //write code download image , data server , set here } @override public int getitemcount() { return mbestoffers.size(); } } please me solve issue, greately appriciated.
please paste jsonobject.tostring() in completed().
array empty reason here.
jsonarray array_item = new jsonarray(); (int = 0; < array_item.length(); i++) {
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