android - I am getting a null pointer exception in my custom adapter getView() method -


java.lang.nullpointerexception: name null

  @override public view getview(int position, view convertview, viewgroup parent) {      holder holder;     if (convertview == null) {         holder = new holder();         layoutinflater vi = (layoutinflater) getcontext().getsystemservice(context.layout_inflater_service);         convertview = vi.inflate(r.layout.history_item, parent, false);          holder.tvcat = (textview)convertview.findviewbyid(r.id.tv_category);         holder.tvamt = (textview)convertview.findviewbyid(r.id.tv_amount);         holder.tvdate = (textview)convertview.findviewbyid(r.id.tv_date);         holder.img = (imageview)convertview.findviewbyid(r.id.iv);         convertview.settag(holder);      }      holder=(holder)convertview.gettag();     //holder holder = new holder();     //view rowview;     historyitem historyitem;     //rowview=inflater.inflate(r.layout.history_item,null);      historyitem = historyitems.get(position);      holder.tvcat.settext(historyitem.getcategory());     holder.tvamt.settext(historyitem.getamount()+"");      dateformat df = new simpledateformat("yyyy/mm/dd kk:mm:ss");     calendar c    = calendar.getinstance();     c.settimeinmillis(historyitem.gettimestamp());     date day      = c.gettime();      holder.tvdate.settext(df.format(day));      resources res = context.getresources();     string mdrawablename = iconmapper.get(historyitem.getcategory());      //this line giving null pointer exception...     int resid = res.getidentifier(mdrawablename , "drawable", context.getpackagename());      holder.img.setimageresource(resid);      return convertview; }

i checked mdrawablename , holds correct value.
also, context coming listview class.
appreciated.

logcat : 

java.lang.nullpointerexception: name null                                                                                    @ android.content.res.resourcesimpl.getidentifier(resourcesimpl.java:214)                                                                                    @ android.content.res.resources.getidentifier(resources.java:1866)                                                                                    @ com.example.sharang.wheresmymoney.historycustomadapter.getview(historycustomadapter.java:92)                                                                                    @ com.baoyz.swipemenulistview.swipemenuadapter.getview(swipemenuadapter.java:49)                                                                                    @ android.widget.abslistview.obtainview(abslistview.java:2369)                                                                                    @ android.widget.listview.makeandaddview(listview.java:1970)                                                                                    @ android.widget.listview.filldown(listview.java:704)                                                                                    @ android.widget.listview.fillfromtop(listview.java:765)                                                                                    @ android.widget.listview.layoutchildren(listview.java:1744)                                                                                    @ android.widget.abslistview.onlayout(abslistview.java:2161)                                                                                    @ android.view.view.layout(view.java:17526)                                                                                    @ android.view.viewgroup.layout(viewgroup.java:5612)                                                                                    @ android.widget.linearlayout.setchildframe(linearlayout.java:1741)                                                                                    @ android.widget.linearlayout.layoutvertical(linearlayout.java:1585)                                                                                    @ android.widget.linearlayout.onlayout(linearlayout.java:1494)                                                                                    @ android.view.view.layout(view.java:17526)                                                                                    @ android.view.viewgroup.layout(viewgroup.java:5612)                                                                                    @ android.widget.framelayout.layoutchildren(framelayout.java:323)                                                                                    @ android.widget.framelayout.onlayout(framelayout.java:261)                                                                                    @ android.view.view.layout(view.java:17526)                                                                                    @ android.view.viewgroup.layout(viewgroup.java:5612)                                                                                    @ android.support.v7.widget.actionbaroverlaylayout.onlayout(actionbaroverlaylayout.java:433)                                                                                    @ android.view.view.layout(view.java:17526)                                                                                    @ android.view.viewgroup.layout(viewgroup.java:5612)                                                                                    @ android.widget.framelayout.layoutchildren(framelayout.java:323)                                                                                    @ android.widget.framelayout.onlayout(framelayout.java:261)                                                                                    @ android.view.view.layout(view.java:17526)                                                                                    @ android.view.viewgroup.layout(viewgroup.java:5612)                                                                                    @ android.widget.linearlayout.setchildframe(linearlayout.java:1741)                                                                                    @ android.widget.linearlayout.layoutvertical(linearlayout.java:1585)                                                                                    @ android.widget.linearlayout.onlayout(linearlayout.java:1494)                                                                                    @ android.view.view.layout(view.java:17526)                                                                                    @ android.view.viewgroup.layout(viewgroup.java:5612)                                                                                    @ android.widget.framelayout.layoutchildren(framelayout.java:323)                                                                                    @ android.widget.framelayout.onlayout(framelayout.java:261)                                                                                    @ com.android.internal.policy.decorview.onlayout(decorview.java:724)                                                                                    @ android.view.view.layout(view.java:17526)                                                                                    @ android.view.viewgroup.layout(viewgroup.java:5612)                                                                                    @ android.view.viewrootimpl.performlayout(viewrootimpl.java:2342)                                                                                    @ android.view.viewrootimpl.performtraversals(viewrootimpl.java:2069)                                                                                    @ android.view.viewrootimpl.dotraversal(viewrootimpl.java:1246)                                                                                    @ android.view.viewrootimpl$traversalrunnable.run(viewrootimpl.java:6307)                                                                                    @ android.view.choreographer$callbackrecord.run(choreographer.java:871)                                                                                    @ android.view.choreographer.docallbacks(choreographer.java:683)                                                                                    @ android.view.choreographer.doframe(choreographer.java:619)                                                                                    @ android.view.choreographer$framedisplayeventreceiver.run(choreographer.java:857)                                                                                    @ android.os.handler.handlecallback(handler.java:751)                                                                                    @ android.os.handler.dispatchmessage(handler.java:95)                                                                                    @ android.os.looper.loop(looper.java:154)                                                                                    @ android.app.activitythread.main(activitythread.java:6077)                                                                                    @ java.lang.reflect.method.invoke(native method)                                                                                    @ com.android.internal.os.zygoteinit$methodandargscaller.run(zygoteinit.java:865)                                                                                    @ com.android.internal.os.zygoteinit.main(zygoteinit.java:755)

you can replace context getcontext()

and make sure not use getapplicationcontext when create adapter

you'll have figure out why iconmapper doesn't contain historyitem category value

if fails, add null check around setting image resource


Comments

Post a Comment

Popular posts from this blog

sql server - Cannot query correctly (MSSQL - PHP - JSON) -

i have little problem on project. , turns out query result returns nothing when value of first name or last name has 'ñ' in it. here's code config.php: <?php ini_set('mssql.charset', 'utf-8'); header('content-type: text/html; charset=utf-8'); $servername = "192.168.1.21"; /* ip add of db server */ $connection = array("database" => "db", "uid" => "?", "pwd" => "***"); $conn = sqlsrv_connect($servername, $connection); if(!$conn){ echo "connection not established."; die(print_r(sqlsrv_errors(), true)); } ?> myquery: $idnumber = $_post["idnum"]; $response = array(); $query2 = "select clname, cfname, cmname, cqualifier student cidno = '$idnumber'"; try{ $stmt2 = sqlsrv_query($conn, $query2); } catch(pdoexeption $ex){ $response["success"] = 0; $response["message"] = "d...
Read more

php - trouble displaying mysqli database results in correct order -

i have table in database stores events , date expire. want display events on website display current events first expired events after? i have tried following sql $sql = "select noticeid, notice, noticedesc, noticeimg, noticedate, expirydate tbl_notices group noticeid ,expired order expirydate asc"; but returns expired results first due expirydate being ordered asc in query. my tbl_notice structure looks this noticeid => int(4) notice => varchar(100) noticedesc => text noticedate => timestamp noticeimg => varchar(40) expirydate => datetime expired => int(1) 0 current or 1 expired my php code is $sql = "select noticeid, notice, noticedesc, noticeimg, noticedate, expirydate tbl_notices group noticeid ,expired order expirydate asc"; $result = mysqli_query($conn,$sql); if ($result->num_rows > 0) { // output data of each row while($row = $result->fetch_assoc()) { ...
Read more

C++ Linked List -

i trying create linked list download txt file , use linked list handle file line line. when handling downloaded linked list operations performed on such text editor would. encountering problems however. seems "node(string value)" section of code has wrong though original node() declaration no arguments passes. unable figure out quite is. node.h class node { public: node(); node(string value); void setnext(node *nextnode); // allows user set "next" pointer of node points friend class linkedlist; private: string data; // data box node* next; // pointer box }; node.cpp # include <string> # include "node.h" using namespace std; node::node() { data = ""; next = null; } node::node(string value) { data = value; next = null; } void node::setnext(node *nextnode) // allows user set "next" pointer of node points { this->next = nextnode; } your #include <string> ...
Read more