java - Null Point Exception -> editText.getText().toString() -

i'm getting null point exception when this:

 string serial = serialfield.gettext().tostring(); 

here's code:

public static class pointcreation extends fragment {      public view oncreateview(layoutinflater inflater, viewgroup container,                              bundle savedinstancestate) {         // inflate layout fragment          view view = inflater.inflate(r.layout.point_creation, container, false);          button buttonguardar = (button) view.findviewbyid(r.id.buttonguardar);         buttonguardar.setonclicklistener(new view.onclicklistener() {             @override             public void onclick(view view) {                 toast.maketext(getactivity().getapplicationcontext(), "tou carregar no botao guardar", toast.length_long).show();                  final edittext serialfield = (edittext) view.findviewbyid(r.id.serial);                 final edittext observationfield = (edittext) view.findviewbyid(r.id.observation);                 string serial = serialfield.gettext().tostring();                 string observation = observationfield.gettext().tostring();                 pointslist.add(new point("serial", observation, false, 1, 2, 3, 4,                         5, 6, 7, 8, 9));                 toast.maketext(getactivity().getapplicationcontext(), observation, toast.length_long).show();             }         });         button buttonapagar = (button) view.findviewbyid(r.id.buttonapagar);         buttonapagar.setonclicklistener(new view.onclicklistener() {             @override             public void onclick(view view) {                 toast.maketext(getactivity().getapplicationcontext(), "tou carregar no botao apagar", toast.length_long).show();             }         });         return view;     } } 

here's xml:

<relativelayout xmlns:android="http://schemas.android.com/apk/res/android"     android:layout_width="match_parent"     android:layout_height="match_parent"     android:orientation="vertical" >      <textview         android:id="@+id/serial"         android:layout_width="150dp"         android:layout_height="45dp"         android:textsize="20sp"         android:textstyle="bold"         android:gravity="center"         android:text="serial"         />      <edittext         android:id="@+id/serial"         android:layout_height="wrap_content"         android:layout_torightof="@+id/serial"         android:inputtype="text"         android:layout_width="fill_parent"         >     </edittext>      <textview         android:id="@+id/observations"         android:layout_width="150dp"         android:layout_height="45dp"         android:textsize="20sp"         android:textstyle="bold"         android:gravity="center"         android:layout_below="@+id/serial"         android:text="observações" />      <edittext         android:id="@+id/observation"         android:layout_height="wrap_content"         android:layout_torightof="@+id/observations"         android:inputtype="text"         android:layout_width="fill_parent"         android:layout_below="@+id/serial"         >     </edittext> </relativelayout> 

logcat:

04-09 17:07:38.639  14736-14736/com.example.testlayout.app e/androidruntime﹕ fatal exception: main     process: com.example.testlayout.app, pid: 14736     java.lang.nullpointerexception             @ com.example.testlayout.app.pointslist$pointcreation$1.onclick(pointslist.java:120)             @ android.view.view.performclick(view.java:4438)             @ android.view.view$performclick.run(view.java:18422)             @ android.os.handler.handlecallback(handler.java:733)             @ android.os.handler.dispatchmessage(handler.java:95)             @ android.os.looper.loop(looper.java:136)             @ android.app.activitythread.main(activitythread.java:5017)             @ java.lang.reflect.method.invokenative(native method)             @ java.lang.reflect.method.invoke(method.java:515)             @ com.android.internal.os.zygoteinit$methodandargscaller.run(zygoteinit.java:779)             @ com.android.internal.os.zygoteinit.main(zygoteinit.java:595)             @ dalvik.system.nativestart.main(native method) 

you need move out of button onclick

 edittext serialfield = (edittext) view.findviewbyid(r.id.serial); 

what happens looking edittext child of button not case

so should be

public view oncreateview(layoutinflater inflater, viewgroup container,                              bundle savedinstancestate) {         // inflate layout fragment          view view = inflater.inflate(r.layout.point_creation, container, false);         final edittext serialfield = (edittext) view.findviewbyid(r.id.serial);         final edittext observationfield = (edittext) view.findviewbyid(r.id.observation);         button buttonguardar = (button) view.findviewbyid(r.id.buttonguardar);         buttonguardar.setonclicklistener(new view.onclicklistener() {             @override             public void onclick(view view) {                 toast.maketext(getactivity().getapplicationcontext(), "tou carregar no botao guardar", toast.length_long).show();                 string serial = serialfield.gettext().tostring();                 string observation = observationfield.gettext().tostring();                 pointslist.add(new point("serial", observation, false, 1, 2, 3, 4,                         5, 6, 7, 8, 9));                 toast.maketext(getactivity().getapplicationcontext(), observation, toast.length_long).show();             }         });         button buttonapagar = (button) view.findviewbyid(r.id.buttonapagar);         buttonapagar.setonclicklistener(new view.onclicklistener() {             @override             public void onclick(view view) {                 toast.maketext(getactivity().getapplicationcontext(), "tou carregar no botao apagar", toast.length_long).show();             }         });         return view;     } 

edit:

as tyczj pointed can rename

 @override  public void onclick(view view)  

to

 @override  public void onclick(view v)  

and change view view final view view. there no need initialize edittext everytime on button click