java - FragmentManager replace not working -

when use replace function fragmentmanager, fragment being added on top of stack without removing older version. issues i'm able find online stem when people switch between versions of fragmentmanager, can see, use recent version.

case 2:                             getgmcompapp().changeactivitiesfragment(new itservicecenterlistfragment(), true);                             break; 

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public void changeactivitiesfragment(fragment frag, boolean addtobackstack, boolean addifsamefragment) {     try {         if (frag == null) {             // incoming fragment null, cancel operation             return;         }else if(getcurrentactivity() != null){             //activity not null, attempt change activity              //grab fragment manager             fragmentmanager fragmentmanager = getcurrentactivity().getfragmentmanager();              if(shouldincomingfragmentshow(frag, addifsamefragment)){                 //the fragment should swapped out                 setcurrentfragment(frag);                  if(!addtobackstack){                     //the previous fragment should not added backstack navigation                     fragmentmanager.begintransaction()                             .replace(r.id.container, frag).commit();                     toast.maketext(getapplicationcontext(), "did not add back", toast.length_short).show();                 } else {                     // add current transaction backstack                     // easier navigation                      int backstackcount = fragmentmanager.getbackstackentrycount();                     string tag = integer.tostring(backstackcount);                      //checks see if fragment exists somewhere on backstack                     for(int = 0; < backstackcount; i++){                         //toast.maketext(getapplicationcontext(), "cmp: " + frag.getclass().getsimplename() +" " +  fragmentmanager.getbackstackentryat(i).getname(), toast.length_short).show();                         if(frag.getclass().getsimplename().equals(fragmentmanager.getbackstackentryat(i).getname())){                             //fragment duplicatefragment = fragmentmanager.findfragmentbytag(integer.tostring(i));                             //tag = integer.tostring(i);                             //fragmentmanager.begintransaction().remove(duplicatefragment).commit();                         }                     }                      fragmentmanager                             .begintransaction()                             .replace(r.id.container, frag)                             .addtobackstack(frag.getclass().getsimplename())                             .commit();                  }                  if(frag.getclass().equals(viewimagefragment.class))                 {                     getcurrentactivity().setrequestedorientation(activityinfo.screen_orientation_landscape);                  }else if(getcurrentactivity().getrequestedorientation() != activityinfo.screen_orientation_portrait){                      getcurrentactivity().setrequestedorientation(activityinfo.screen_orientation_portrait);                  }             }          }      } catch (exception ex) {         log.e(tag, ex.getmessage());     } } 

the relevant xml:

<android.support.v4.widget.drawerlayout     xmlns:android="http://schemas.android.com/apk/res/android"     android:id="@+id/drawer_layout"     android:layout_width="match_parent"     android:layout_height="match_parent">     <!-- main content view --> <framelayout      android:id="@+id/container"     android:layout_width="match_parent"     android:layout_height="match_parent"     android:background="@android:color/black"/>      <!-- navigation drawer -->     <listview android:id="@+id/left_drawer"         android:layout_width="240dp"         android:layout_height="match_parent"         android:layout_gravity="start"         android:choicemode="singlechoice"     android:divider="@android:color/transparent"     android:dividerheight="2dp"     android:background="#111"/> 

i attempted manually remove , add fragments, , not able remove remove fragment, assume same issue replace (the remove part failing add being successful).

thanks.

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i created own solution , posting in case helps else. manually managed fragments , created own stack in array. stores fragments in between new version , old version of duplicate fragment, , pops off duplicate. restores in-between fragments , adds brand new fragment on top.

private void managebackstack(fragment frag){          fragmentmanager fragmanager = getcurrentactivity().getfragmentmanager();         fragment testfrag = fragmanager.findfragmentbytag(frag.getclass().getsimplename());         if(testfrag != null) {  //if fragment exists              int maxindex = fragmanager.getbackstackentrycount() - 1;             fragment[] stackplaceholder = new fragment[maxindex];              //store fragments between new fragment , old duplicate in array             (int = maxindex; >= 0; i--) {                 string newfragname = fragmanager.getbackstackentryat(i).getname();                 if(!newfragname.equals(frag.getclass().getsimplename())) {                     //do not add fragments generated inside other fragments on stack                     if (!newfragname.equals("itservicecenterfragment")) {                         stackplaceholder[i - 1] = fragmanager.findfragmentbytag(newfragname);                     }                     fragmanager.popbackstackimmediate();                 }else {                     fragmanager.begintransaction().remove(fragmanager.findfragmentbytag(newfragname)).commit();                     fragmanager.popbackstackimmediate();                     break;                 }             }              //push in-between fragments onto stack             (int = 0; < maxindex; i++) {                 if (stackplaceholder[i] != null) {                     string fragname = stackplaceholder[i].getclass().getsimplename();                     fragmanager                             .begintransaction()                             .replace(r.id.container, stackplaceholder[i], fragname)                             .addtobackstack(fragname)                             .commit();                 }             }         }          //push recent fragment onto stack         fragmanager                 .begintransaction()                 .replace(r.id.container, frag, frag.getclass().getsimplename())                 .addtobackstack(frag.getclass().getsimplename())                 .commit();     }