android - Fragment Already active : Illegal State Exception -


i have gridview items on click of item move activity has fragment. when go activity come gridview , go activity other item fails following exception:

at android.app.activitythread.performlaunchactivity(activitythread.java:2318)        @ android.app.activitythread.handlelaunchactivity(activitythread.java:2396)        @ android.app.activitythread.access$800(activitythread.java:139)        @ android.app.activitythread$h.handlemessage(activitythread.java:1293)        @ android.os.handler.dispatchmessage(handler.java:102)        @ android.os.looper.loop(looper.java:149)        @ android.app.activitythread.main(activitythread.java:5257)        @ java.lang.reflect.method.invokenative(method.java)        @ java.lang.reflect.method.invoke(method.java:515)        @ com.android.internal.os.zygoteinit$methodandargscaller.run(zygoteinit.java:817)        @ com.android.internal.os.zygoteinit.main(zygoteinit.java:633)        @ dalvik.system.nativestart.main(nativestart.java) caused by: java.lang.illegalstateexception: fragment active        @ android.support.v4.app.fragment.setarguments(fragment.java:530)        @ com.buzzreel.myactivity.oncreate(myactivity.java:81)        @ android.app.activity.performcreate(activity.java:5411)        @ android.app.instrumentation.callactivityoncreate(instrumentation.java:1087)        @ android.app.activitythread.performlaunchactivity(activitythread.java:2270)        @ android.app.activitythread.handlelaunchactivity(activitythread.java:2396)        @ android.app.activitythread.access$800(activitythread.java:139)        @ android.app.activitythread$h.handlemessage(activitythread.java:1293)        @ android.os.handler.dispatchmessage(handler.java:102)        @ android.os.looper.loop(looper.java:149)        @ android.app.activitythread.main(activitythread.java:5257)        @ java.lang.reflect.method.invokenative(method.java)        @ java.lang.reflect.method.invoke(method.java:515)        @ com.android.internal.os.zygoteinit$methodandargscaller.run(zygoteinit.java:817)        @ com.android.internal.os.zygoteinit.main(zygoteinit.java:633)        @ dalvik.system.nativestart.main(nativestart.java)

this code of fragment in myactivity oncreate():

 fragment myfragment = myfragment.getinstance();               bundle profileargs = new bundle();               profileargs.putserializable("data", customobject);               myfragment.setarguments(profileargs);                fragmentmanager manager = getsupportfragmentmanager();                fragmenttransaction transaction = manager.begintransaction();                transaction.add(r.id.fragment_info, myfragment,                             "myfragment");               transaction.commit();

this getinstance method in fragment class:

 public static myframgent getinstance() {                       return  new myframgent();               }

the problem using same fragment backstack name every time click gridview item here:

transaction.add(r.id.fragment_info, myfragment, "myfragment");

what need set string null:

transaction.add(r.id.fragment_info, myfragment, null);

or if using name backstack use different name each of onclick of gridviews


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