Android. In case of turn of the screen throw exception -

Android. In case of turn of the screen throw exception -

android. in case of turn of screen throw exception, in there can problem? used fragment:

@override public void oncreate(bundle savedinstancestate) { super.oncreate(savedinstancestate); setretaininstance(true); }

exception:

e/androidruntime﹕ fatal exception: main java.lang.illegalstateexception: no activity @ android.support.v4.app.fragmentmanagerimpl.movetostate(fragmentmanager.java:1113) @ android.support.v4.app.fragmentmanagerimpl.movetostate(fragmentmanager.java:1108) @ android.support.v4.app.fragmentmanagerimpl.dispatchresume(fragmentmanager.java:1927) @ android.support.v4.app.fragmentactivity.onresumefragments(fragmentactivity.java:444) @ android.support.v4.app.fragmentactivity$1.handlemessage(fragmentactivity.java:96) @ android.os.handler.dispatchmessage(handler.java:130) @ android.os.looper.loop(sourcefile:351) @ android.app.activitythread.main(activitythread.java:3841) @ java.lang.reflect.method.invokenative(native method) @ java.lang.reflect.method.invoke(method.java:538) @ com.android.internal.os.zygoteinit$methodandargscaller.run(zygoteinit.java:969) @ com.android.internal.os.zygoteinit.main(zygoteinit.java:727) @ dalvik.system.nativestart.main(native method) 04-07 13:24:30.961 32514-32516/ru.netbynet e/dalvikvm﹕ [dvm] mmap homecoming base of operations = 46593000

activity on create: android.support.v4.app.fragmentmanager fragmentmanager = getsupportfragmentmanager(); signinworkerfragment retainedworkerfragment = (signinworkerfragment) fragmentmanager.findfragmentbytag(tag_worker); if (retainedworkerfragment != null) { msigninmodel = retainedworkerfragment.getsigninmodel(); } else { signinworkerfragment workerfragment = new signinworkerfragment(); fragmentmanager.begintransaction() .add(workerfragment, tag_worker) .commit(); msigninmodel = workerfragment.getsigninmodel(); }

android android-fragments android-activity