Initiating an instance of PopupWindow as a class from a fragment in Android -

-

i've been getting null pointer exception when try , call showpopup2 firstfragment. showpopup class, 

public class showpopup extends activity { public void showpopup2(view v) {     button btndismiss;     layoutinflater layoutinflater = (layoutinflater)showpopup.this.getsystemservice(context.layout_inflater_service);     view layout = layoutinflater.inflate(r.layout.popup_layout, null);     popupwindow popupwindow = new popupwindow(layout, 580, 500, true);      popupwindow.showatlocation(layout, gravity.center, 0, 40);     btndismiss=(button) layout.findviewbyid(r.id.btndismissxml);     btndismiss.setonclicklistener(new onclicklistener() {         @override     public void onclick(view arg0){         popupwindow.dismiss();         }     }); } }

and fragment,

public class firstfragment extends fragment implements onclicklistener{ public static context context; button btnpopup; public showpopup showpopup;  @override public void oncreate(bundle saveddataentryinstancestate){     super.oncreate(saveddataentryinstancestate); }  //@override public view oncreateview(layoutinflater inflater{        view v = inflater.inflate(r.layout.first_fragment, container, false);        btnpopup = (button)v.findviewbyid(r.id.btnpopupxml);     btnpopup.setonclicklistener(this);     populatefirstfragment(v);     return v; }  //@override public void onviewcreated(view v) {     btnpopup = (button)v.findviewbyid(r.id.btnpopupxml);     btnpopup.setonclicklistener(this); }  //@override public void onclick(view v) {         showpopup.showpopup2(v);     }  }

what causing null pointer exception? there better way structure this? goal able (1) access other methods in application as, (2) not have method cluttering fragments.
in advance....

you have declared instance of showpopup activity in firstfragment, have not initialized causing null pointer when call showpopup.showpopup2(v).
also, activity should not used object call functions on it. can put showpopup2() function inside firstfragment itself.

public class firstfragment extends fragment implements onclicklistener{ public static context context; button btnpopup;   @override public void oncreate(bundle saveddataentryinstancestate){ super.oncreate(saveddataentryinstancestate); }  //@override public view oncreateview(layoutinflater inflater{    view v = inflater.inflate(r.layout.first_fragment, container, false);    btnpopup = (button)v.findviewbyid(r.id.btnpopupxml); btnpopup.setonclicklistener(this); populatefirstfragment(v); return v; }  //@override public void onviewcreated(view v) { btnpopup = (button)v.findviewbyid(r.id.btnpopupxml); btnpopup.setonclicklistener(this); }  //@override public void onclick(view v) {     showpopup2(v); }   public void showpopup2(view v) { button btndismiss; layoutinflater layoutinflater = (layoutinflater)getactivity().getsystemservice(context.layout_inflater_service); view layout = layoutinflater.inflate(r.layout.popup_layout, null); popupwindow popupwindow = new popupwindow(layout, 580, 500, true);  popupwindow.showatlocation(layout, gravity.center, 0, 40); btndismiss=(button) layout.findviewbyid(r.id.btndismissxml); btndismiss.setonclicklistener(new onclicklistener() {     @override public void onclick(view arg0){     popupwindow.dismiss();     } }); }  }

Comments

Post a Comment

Popular posts from this blog

python - mat is not a numerical tuple : openCV error -

-
i have write down code showing error ma not getting it: please help: showing mat not numerical tuple: import cv import cv2 capture = cv2.videocapture("j.3gp") while(1): _, frame1 = capture.read() grayimage1 = cv2.cvtcolor(frame1, cv2.color_bgr2gray) _, frame2 = capture.read() grayimage2 = cv2.cvtcolor(frame2, cv2.color_bgr2gray) differenceimage = cv2.absdiff(grayimage1,grayimage2) thresholdimage = cv2.threshold(differenceimage,25,255,cv2.thresh_binary) cv2.imshow("difference image", differenceimage) cv2.imshow("threshold image", thresholdimage) cv2.imshow("image", frame1) k = cv2.waitkey(30) & 0xff error arising : ----------------------------------------------------------------------------------------- traceback (most recent call last): file "desk.py", line 15, in <module> cv2.imshow("threshold image", thresholdimage) typeerror: mat not numerical tuple
Read more

c# - MSAA finds controls UI Automation doesn't -

-
i'm working on automating windows application. i'm using teststack white framework. i've hit problem. program has 'window' object cannot see inside of. white shows no controls inside of it. inspect.exe shows no controls inside of either when running in ui automation mode. if switch inspect msaa see controls inside fine. there anyway me use msaa c# handle on these controls? if can identify msaa functions need, can use p/invoke call them c#. here's example article doing msaa: http://www.codeproject.com/articles/38906/ui-automation-using-microsoft-active-accessibility also, pinvoke.net can used identify iaccessible (msaa) functions: http://www.pinvoke.net/search.aspx?search=iaccessible&namespace=[all] here's answer along lines: msaa com-based? finally, alternative p/invoke, might able use tlbimp.exe create wrapper assembly oleacc.dll, , access msaa functions through it. i'm not sure if works msaa, it's worth try. as e
Read more

wordpress - .htaccess: RewriteRule: bad flag delimiters -

-
pulling hair out on one. have following .htaccess file custom redirects in addition wordpress's default settings. when tested on local wamp server worked fine after moving production i'm not getting rewriterule: bad flag delimiters error in server log , after while site goes down internal server error any appreciated. in advance! <ifmodule mod_rewrite.c> rewriteengine on rewritebase / rewriterule ^rockford_weddings___welcome\.html$ /wedding/ [r=301,l] rewriterule ^blog/?$ /journal/ [r=301,l] rewriterule ^blog/(.*)$ /$1 [r=301,l] rewriterule ^portraitinvestment/?$ /portraitinvestment\.pdf [r=301,l] rewriterule ^weddinginvestment/?$ /weddinginvestment\.pdf [r=301,l] rewriterule ^holidaycards2014/?$ /holidaycards2014\.pdf [r=301,l] </ifmodule> # begin wordpress <ifmodule mod_rewrite.c> rewriteengine on rewritebase / rewriterule ^index\.php$ - [l] rewritecond %{request_filename} !-f rewritecond %{request_filename} !-d rewriterule . /index.php [l] </
Read more