Please correct my Android Java code using an onkey/onclick listeners on my Dialog -


i triggering dialog password verification , cant figure out why cause exception when incorrect password entered. need jedi masters assist padewan. 

@override private void launchpwddialog(){     layoutinflater li = layoutinflater.from(context);     view promptsview = li.inflate(r.layout.prompts, null);     alertdialog.builder alertdialogbuilder = new alertdialog.builder(context);     alertdialogbuilder.setview(promptsview);     final edittext userinput = (edittext) promptsview.findviewbyid(r.id.edtpasswordinput);     alertdialogbuilder     .setcancelable(true)     .setpositivebutton("finish",      new dialoginterface.onclicklistener() {         public void onclick(dialoginterface dialog, int id){         if (userinput.gettext().tostring().compareto(stradminpassword) == 0){                 disablekioskmode();                     }             else{                 log.i(tag, "function launchpwddialog - admin password incorrect. user entered: " + edt.gettext().tostring());                 toast.maketext(getbasecontext(), "incorrect password", toast.length_short).show();              }         }     })     .setnegativebutton("cancel",     new dialoginterface.onclicklistener() {             public void onclick(dialoginterface dialog, int id){                 disablekioskmode();                 dialog.dismiss();             }         })     .setonkeylistener(new dialoginterface.onkeylistener() {             @override              public boolean onkey(dialoginterface dialog, int keycode, keyevent event){                 if (event.getkeycode() == keyevent.keycode_enter)                     if (userinput.gettext().tostring().compareto(stradminpassword) == 0)                     {                         disablekioskmode();                         userinput.settext("");                         dialog.dismiss();                     }                     else {                         log.i(tag, "function launchpwddialog - admin password incorrect. user entered: " + edt.gettext().tostring());                         toast.maketext(getbasecontext(), "incorrect password", toast.length_short).show();                         if (currentattempt % maxattempts == 0) {                             log.i(tag, "you unauthorised access feature.");                             toast.maketext(getbasecontext(), "you unauthorised access feature.", toast.length_short).show();                             finish();                         }                     }                 return false;             }         });     alertdialog alertdialog = alertdialogbuilder.create();     alertdialog.show(); }

i've got executing disablekioskmode() function upon successful verification of password if enter nothing or wrong password, crashes. not sure if helps heres logcat:

06-01 05:55:24.910 12311 12311 d   androidruntime com.androiddev.kiosk               shutting down vm 06-01 05:55:24.910 12311 12311 w   dalvikvm com.androiddev.kiosk                     threadid=1: thread exiting uncaught exception (group=0x41759c08) 06-01 05:55:24.915 12311 12311 e   androidruntime com.androiddev.kiosk               fatal exception: main 06-01 05:55:24.915 12311 12311 e   androidruntime com.androiddev.kiosk               process: com.androiddev.kiosk, pid: 12311 06-01 05:55:24.915 12311 12311 e   androidruntime com.androiddev.kiosk               java.lang.nullpointerexception 06-01 05:55:24.915 12311 12311 e   androidruntime com.androiddev.kiosk               @ com.androiddev.kiosk.kiosklauncher$100000000.onclick(kiosklauncher.java:413) 06-01 05:55:24.915 12311 12311 e   androidruntime com.androiddev.kiosk               @ com.android.internal.app.alertcontroller$buttonhandler.handlemessage(alertcontroller.java:170) 06-01 05:55:24.915 12311 12311 e   androidruntime com.androiddev.kiosk               @ android.os.handler.dispatchmessage(handler.java:102) 06-01 05:55:24.915 12311 12311 e   androidruntime com.androiddev.kiosk               @ android.os.looper.loop(looper.java:146) 06-01 05:55:24.915 12311 12311 e   androidruntime com.androiddev.kiosk               @ android.app.activitythread.main(activitythread.java:5653) 06-01 05:55:24.915 12311 12311 e   androidruntime com.androiddev.kiosk               @ java.lang.reflect.method.invokenative(native method) 06-01 05:55:24.915 12311 12311 e   androidruntime com.androiddev.kiosk               @ java.lang.reflect.method.invoke(method.java:515) 06-01 05:55:24.915 12311 12311 e   androidruntime com.androiddev.kiosk               @ com.android.internal.os.zygoteinit$methodandargscaller.run(zygoteinit.java:1291) 06-01 05:55:24.915 12311 12311 e   androidruntime com.androiddev.kiosk               @ com.android.internal.os.zygoteinit.main(zygoteinit.java:1107)

check if userinput.gettext().tostring() null before making operations on it.


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