java - Getting null pointer exception while loading -
i getting nullpointer exception when load class offline_day. have tried solve problem unable @ root cause why nullpointer exception occurring. i have edited code after useful advice. still getting npeeception. class this: offline_day.java:-
public class offline_day extends dialogfragment implements ondatechangedlistener, ontimechangedlistener { public final static int date_picker = 1; public final static int time_picker = 2; public final static int date_time_picker = 3; private datepicker datepicker; private timepicker timepicker1; private timepicker timepicker2; private calendar mcalendar; private activity activity; private int dialogtype; private view mview; @override public view oncreateview(layoutinflater inflater, viewgroup container,bundle savedinstancestate) { //activity activity; view mview = inflater.inflate(r.layout.offline_day, container, false); mcalendar = calendar.getinstance(); datepicker = (datepicker) mview.findviewbyid(r.id.datepicker1); // datepicker.init(mcalendar.get(calendar.year), mcalendar.get(calendar.month), mcalendar.get(calendar.day_of_month), this); timepicker1 = (timepicker) mview.findviewbyid(r.id.timepicker1); timepicker2 = (timepicker) mview.findviewbyid(r.id.timepicker2); button=(button)mview.findviewbyid(r.id.button1); //setis24hourview(true); //setcalendarviewshown(false); //ondatechanged(datepicker,2015,6,5); //ontimechanged(timepicker1,9,00); //ontimechanged(timepicker2,19,30); //datepicker.setvisibility(view.gone); //timepicker1.setvisibility(view.gone); //timepicker2.setvisibility(view.gone); return mview; } @override public boolean onoptionsitemselected(menuitem item) { // handle action bar item clicks here. action bar // automatically handle clicks on home/up button, long // specify parent activity in androidmanifest.xml. int id = item.getitemid(); if (id == r.id.action_settings) return true; return super.onoptionsitemselected(item); } @override public void onactivitycreated(bundle savedinstancestate) { super.onactivitycreated(savedinstancestate); //timepicker1.setontimechangedlistener(this); //timepicker2.setontimechangedlistener(this); } /*public int get(final int field) { return mcalendar.get(field); } public long getdatetimemillis() { return mcalendar.gettimeinmillis(); } public void setis24hourview(boolean is24hourview) { timepicker1.setis24hourview(is24hourview1()); timepicker2.setis24hourview(is24hourview2()); } public boolean is24hourview1() { return timepicker1.is24hourview(); } public boolean is24hourview2() { return timepicker2.is24hourview(); } public void setcalendarviewshown(boolean calendarview) { datepicker.setcalendarviewshown(calendarview); } public boolean calendarviewshown() { return datepicker.getcalendarviewshown(); } public void updatedate(int year, int monthofyear, int dayofmonth) { datepicker.updatedate(year, monthofyear, dayofmonth); } public void updatetime(int currenthour, int currentminute) { timepicker1.setcurrenthour(currenthour); timepicker1.setcurrentminute(currentminute); timepicker2.setcurrenthour(currenthour); timepicker2.setcurrentminute(currentminute); } public string getdatetime() { simpledateformat sdf = new simpledateformat("dd-mm-yyyy hh:mm:ss", locale.getdefault()); return sdf.format(mcalendar.gettime()); }*/ @override public void ondatechanged(datepicker view, int year, int monthofyear, int dayofmonth) { mcalendar.set(mcalendar.get(calendar.year), mcalendar.get(calendar.month), mcalendar.get(calendar.day_of_month)); } @override public void ontimechanged(timepicker view, int hourofday, int minute) { //mcalendar.set(mcalendar.get(calendar.year), mcalendar.get(calendar.month), mcalendar.get(calendar.day_of_month), hourofday, minute); mcalendar.set(mcalendar.get(calendar.hour_of_day), mcalendar.get(calendar.minute)); } /*private datepickerdialog.ondatesetlistener datepickerlistener=new datepickerdialog.ondatesetlistener() { public void ondateset(datepicker view, int selectedyear,int selectedmonth, int selectedday) {} }; datepickerdialog dialog = new datepickerdialog(getactivity(), datepickerlistener, 2000, 1,1); */ } this class.
now when load application following errors:
06-11 16:30:54.229: e/androidruntime(1592): fatal exception: main 06-11 16:30:54.229: e/androidruntime(1592): process: com.example.mobidoot pid: 1592 06-11 16:30:54.229: e/androidruntime(1592): java.lang.nullpointerexception: attempt invoke virtual method 'android.content.res.resources$theme android.content.context.gettheme()' on null object reference 06-11 16:30:54.229: e/androidruntime(1592): @ android.app.datepickerdialog.resolvedialogtheme(datepickerdialog.java:88) 06-11 16:30:54.229: e/androidruntime(1592): @ android.app.datepickerdialog.<init>(datepickerdialog.java:105) 06-11 16:30:54.229: e/androidruntime(1592): @ android.app.datepickerdialog.<init>(datepickerdialog.java:82) 06-11 16:30:54.229: e/androidruntime(1592): @ android.view.view.performclick(view.java:4780) 06-11 16:30:54.229: e/androidruntime(1592): @ android.view.view$performclick.run(view.java:19866) 06-11 16:30:54.229: e/androidruntime(1592): @ android.os.handler.handlecallback(handler.java:739) 06-11 16:30:54.229: e/androidruntime(1592): @ android.os.handler.dispatchmessage(handler.java:95) 06-11 16:30:54.229: e/androidruntime(1592): @ android.os.looper.loop(looper.java:135) 06-11 16:30:54.229: e/androidruntime(1592): @ android.app.activitythread.main(activitythread.java:5257) 06-11 16:30:54.229: e/androidruntime(1592): @ java.lang.reflect.method.invoke(native method) 06-11 16:30:54.229: e/androidruntime(1592): @ java.lang.reflect.method.invoke(method.java:372) 06-11 16:30:54.229: e/androidruntime(1592): @ com.android.internal.os.zygoteinit$methodandargscaller.run(zygoteinit.java:903) 06-11 16:30:54.229: e/androidruntime(1592): @ com.android.internal.os.zygoteinit.main(zygoteinit.java:698) i still getting npexception. highly appreciated.
datepickerdialog dialog = new datepickerdialog(getactivity(), datepickerlistener, 2000, 1,1);
getactivity() return null when you're initializing fragment. you'll have wait until onattach() in fragment lifecycle return non-null.
that's reason npe.
overall, don't have non-default constructors in fragments. set fragment view in oncreateview() generic fragments, or oncreatedialog() dialogfragments.
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