android - How to replace a fragment by itself on MarkerClick GoogleMap -

hello know how can replace fragment when click on same marker on googlemap. when click first time, fragment appears when click second time on it, app crash.

this fragment :

public class infowindowfragment extends fragment {  public infowindowfragment() {}  @override public view oncreateview(layoutinflater inflater, viewgroup container,                          bundle savedinstancestate) {     view v =  inflater.inflate(r.layout.fragment_info_window, container, false);     return v; } 

}

this fragment declaration :

fragment fragment = new infowindowfragment(); private final fragmentmanager fragmentmanager = getsupportfragmentmanager(); private final fragmenttransaction fragmenttransaction = fragmentmanager.begintransaction(); 

this onmarkerclick function :

@override public boolean onmarkerclick(marker marker) {     if (marker.equals(franprixmap))          {                  fragmenttransaction.replace(r.id.infowindow, fragment);                  fragmenttransaction.addtobackstack(null);                  fragmenttransaction.commit();          }          return true; } 

this marker :

franprixmap = map.addmarker(new markeroptions()             .icon(bitmapdescriptorfactory.fromresource(r.drawable.logo_franprix2))             .position(logo_franprix3); 

this main layout :

<relativelayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="match_parent" android:layout_height="match_parent" android:orientation="vertical"> <fragment     android:id="@+id/map"     class="com.google.android.gms.maps.supportmapfragment"     android:layout_width="match_parent"     android:layout_height="match_parent"     android:layout_alignparentbottom="true"/>  <relativelayout     android:id="@+id/infowindow"     android:layout_width="match_parent"     android:layout_height="150dp"     android:layout_alignparentbottom="true"> </relativelayout> 

this fragment's layout :

<linearlayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:tools="http://schemas.android.com/tools" android:orientation="horizontal" android:layout_width="match_parent" android:layout_height="150dp">     <imageview         android:id="@+id/imageview"         android:layout_width="200dp"         android:layout_height="200dp"         android:src="@drawable/image2" />      <linearlayout         android:layout_width="match_parent"         android:layout_height="match_parent"         android:layout_margintop="10dp"         android:layout_weight="50"         android:orientation="vertical">             <textview                 android:id="@+id/txtname"                 android:layout_width="match_parent"                 android:layout_height="wrap_content"                 android:layout_marginbottom="10dp"                 android:text="text"                 android:textappearance="?android:attr/textappearancemedium"                 android:textcolor="#000"/>              <textview                 android:text="35 avenue de flandre"                 android:textappearance="?android:attr/textappearancemedium"                 android:layout_width="match_parent"                 android:layout_height="wrap_content"                 android:id="@+id/txtaddress"                 android:layout_marginbottom="10dp"                 android:textcolor="#000"/>              <textview                 android:id="@+id/txthours"                 android:layout_width="match_parent"                 android:layout_height="wrap_content"                 android:layout_marginbottom="10dp"                 android:text="10h - 20h"                 android:textappearance="?android:attr/textappearancemedium"                 android:textcolor="#000" />     </linearlayout> 

i have tried lot of solutions, nothing work. thank !