java.lang.NoSuchMethodError: android.app.FragmentTransaction.attach compatibility library v13 issue -

i implementing actionbar swipe feature on tabs first time. running on honeycomb os (api level 11). hence have use support compatibility library v13 use view pager , other components used build swipe mechanism fragmentpageradapter.

i using tutorial on developer.android build this. here link.

however getting strange issue of no such method found attach , detach.

let me post full track trace

09-04 13:07:42.560: e/androidruntime(774): java.lang.nosuchmethoderror: android.app.fragmenttransaction.attach 09-04 13:07:42.560: e/androidruntime(774):  @ android.support.v13.app.fragmentpageradapter.instantiateitem(fragmentpageradapter.java:99) 09-04 13:07:42.560: e/androidruntime(774):  @ android.support.v4.view.viewpager.addnewitem(viewpager.java:832) 09-04 13:07:42.560: e/androidruntime(774):  @ android.support.v4.view.viewpager.populate(viewpager.java:1016) 09-04 13:07:42.560: e/androidruntime(774):  @ android.support.v4.view.viewpager.populate(viewpager.java:914) 09-04 13:07:42.560: e/androidruntime(774):  @ android.support.v4.view.viewpager$3.run(viewpager.java:244) 09-04 13:07:42.560: e/androidruntime(774):  @ android.os.handler.handlecallback(handler.java:587) 09-04 13:07:42.560: e/androidruntime(774):  @ android.os.handler.dispatchmessage(handler.java:92) 09-04 13:07:42.560: e/androidruntime(774):  @ android.os.looper.loop(looper.java:126) 09-04 13:07:42.560: e/androidruntime(774):  @ android.app.activitythread.main(activitythread.java:3997) 09-04 13:07:42.560: e/androidruntime(774):  @ java.lang.reflect.method.invokenative(native method) 09-04 13:07:42.560: e/androidruntime(774):  @ java.lang.reflect.method.invoke(method.java:491) 09-04 13:07:42.560: e/androidruntime(774):  @ com.android.internal.os.zygoteinit$methodandargscaller.run(zygoteinit.java:841) 09-04 13:07:42.560: e/androidruntime(774):  @ com.android.internal.os.zygoteinit.main(zygoteinit.java:599) 09-04 13:07:42.560: e/androidruntime(774):  @ dalvik.system.nativestart.main(native method) 

i have gone through same link represent same issue didnt solve problem. this link same issue

i not using actionbarsherloc running on api level 11.

i posting adapter class , tablistener in case want give look.

public class mypageradapter extends fragmentpageradapter{          fragment mfragment;         public mypageradapter(fragmentmanager fm) {             super(fm);             // todo auto-generated constructor stub         }          @override         public android.app.fragment getitem(int position) {             // todo auto-generated method stub             switch (position) {             case 0:                 mfragment = (patientforms)new patientforms();                 return mfragment;             case 1:                 mfragment = (vitals)new vitals();                 return mfragment;             case 2:                 mfragment = (chartsactivity)new chartsactivity();                 return mfragment;             case 3:                 mfragment = (note)new note();                 return mfragment;                default:                 return null;             }         }          @override         public int getcount() {             // todo auto-generated method stub             return 4;         }          @override         public void destroyitem(viewgroup container, int position,                 object object) {             // todo auto-generated method stub         }      }  private class mytablistener implements actionbar.tablistener     {         private fragment mfragment;         private final activity mactivity;         private final string mfragname;          public mytablistener( activity activity, string fragname )         {             mactivity = activity;             mfragname = fragname;         }          @override         public void ontabselected( tab tab, fragmenttransaction ft )         {             log.i(tag, "tab position set "+tab.getposition());             pager.setcurrentitem(tab.getposition());         }          @override         public void ontabreselected(tab tab, android.app.fragmenttransaction ft) {             // todo auto-generated method stub          }           @override         public void ontabunselected(tab tab, android.app.fragmenttransaction ft) {             // todo auto-generated method stub //          ft.remove( mfragment ); //          mfragment = null;         }     } 

try this

public android.support.v4.app.fragment getitem(int position) {         // todo auto-generated method stub         switch (position) {          default:             return null;         }     } 

update

check import statements , replace lines

import android.app.fragment; import android.app.fragmentmanager; import android.app.fragmenttransaction; import android.app.fragmentactivity; 

replace this

import android.support.v4.app.fragmentactivity; import android.support.v4.app.fragment; import android.support.v4.app.fragmentmanager; import android.support.v4.app.fragmenttransaction;