java - Android throwing null pointer exception when accessing a keyboard from another fragment -

so have fragment activity uses fragments keyboard add marker map , kep getting null pointer exception. i'm accessing keyboard in host fragment add data list.to clear keyboard being used 2 fragments @ same time. code(this fragment access keyboard fragment):

  @override         protected void oncreate(bundle savedinstancestate) {             super.oncreate(savedinstancestate);             final edittext textlat = (edittext)findviewbyid(r.id.textlat);             final edittext textlong = (edittext)findviewbyid(r.id.textlong);             edittext po = (edittext)findviewbyid(r.id.podata);             setcontentview(r.layout.activity_maps);             setupmapifneeded();             mmap.addmarker(new markeroptions().position(new latlng(0, 0)).title("marker"));             mmap.setmylocationenabled(true);    /*this line throws error*/po.setonkeylistener(new view.onkeylistener() {                 @override                 public boolean onkey(view v, int keycode, keyevent event) {                     if (keycode == keyevent.keycode_enter && event.getaction() == keyevent.action_down) {                         int latitudei = integer.parseint(textlat.gettext().tostring());                         int logitudei = integer.parseint(textlong.gettext().tostring());                         mmap.addmarker(new markeroptions().position(new latlng(latitudei, logitudei)));                     }                     return false;                 }             });         } 

this keyboard's fragment

@override     public void oncreate(bundle savedinstancestate) {         super.oncreate(savedinstancestate);         if (getarguments() != null) {             final edittext po = (edittext)getactivity().findviewbyid(r.id.podata);             edittext textlat = (edittext)getactivity().findviewbyid(r.id.textlat);             edittext textlong = (edittext)getactivity().findviewbyid(r.id.textlong);             listview data = (listview)getactivity().findviewbyid(r.id.listview);             mparam1 = getarguments().getstring(arg_param1);             mparam2 = getarguments().getstring(arg_param2);             arrayadapter<string> arrayadapter = new arrayadapter<string>(                     getactivity(),                     android.r.layout.simple_list_item_1,                     poin);             data.setadapter(arrayadapter);              po.setonkeylistener(new view.onkeylistener() {                 @override                 public boolean onkey(view v, int keycode, keyevent event) {                     if (keycode == keyevent.keycode_enter && event.getaction() == keyevent.action_down) {                         poin.add(po.gettext().tostring());                     }                     return false;                 }             });         }     } 

stack trace:

caused by: java.lang.nullpointerexception             @ com.example.adrian.xxxxxxxxxx.mapsactivity.oncreate(mapsactivity.java:31)             @ android.app.activity.performcreate(activity.java:5312)             @ android.app.instrumentation.callactivityoncreate(instrumentation.java:1111)             @ android.app.activitythread.performlaunchactivity(activitythread.java:2552)             at android.app.activitythread.handlelaunchactivity(activitythread.java:2653)             at android.app.activitythread.access$800(activitythread.java:156)             at android.app.activitythread$h.handlemessage(activitythread.java:1355)             at android.os.handler.dispatchmessage(handler.java:102)             at android.os.looper.loop(looper.java:157)             at android.app.activitythread.main(activitythread.java:5872)             at java.lang.reflect.method.invokenative(native method)             at java.lang.reflect.method.invoke(method.java:515)             at com.android.internal.os.zygoteinit$methodandargscaller.run(zygoteinit.java:852)             at com.android.internal.os.zygoteinit.main(zygoteinit.java:668)             at dalvik.system.nativestart.main(native method) 

a null pointer exception on line of form a.b.c means on left-hand side of dot null. in example :

either null;

or a.b null.

there can no other reason. so, textview.gettext() never returns null, possibility user null.