java - Reusing a fragment class inside an activity -

as not familiar fragments getting quite confused solutions presented on stackoverflow. have tried many different techniques achive task: have class called mapfragment extends fragment. works fine inside viewpager. however, want reuse class different activity. heres sample fragment called mapfragment:

public class mapfragment extends fragment {      @override     public view oncreateview(layoutinflater inflater, viewgroup container, bundle savedinstancestate) {         view rootview = inflater.inflate(r.layout.fragment_mapview, container, false);         mapview = (mapview) rootview.findviewbyid(r.id.fragment_mapview);         mapview.oncreate(savedinstancestate);          this.sethasoptionsmenu(true);          activity.getactionbar().setdisplayhomeasupenabled(true);          initgps();         initviews();         initlisteners();          bundle extras = getarguments();          string url = "";         if(extras.containskey("url"))             url = extras.getstring("url");          new loadmarkers().execute(url);          return rootview;     } } 

let´s have activity want used reuse mapfragment above:

public class mapactivity extends generalactivity {      @override     public void oncreate(bundle savedinstancestate) {         super.oncreate(savedinstancestate);          // want able display mapfragment inside activity         // should here????         enter code here     } } 

then can anywhere in program call intent on mapactivity knowing display mapfragment within it. possible accomplished?

create layout activity class mapactivity. activity_map.xml

rough snippet

<relativelayout  xmlns:android="http://schemas.android.com/apk/res/android"             android:id="@+id/frag_container"             android:layout_width="match_parent"             android:layout_height="match_parent"             > 

in activity class,

public class mapactivity extends generalactivity {      @override     public void oncreate(bundle savedinstancestate) {         super.oncreate(savedinstancestate);          // want able display mapfragment inside activity         // should here????         // enter code here         setcontentview(r.layout.activity_map);          fragment fragment = new mapfragment();         fragmentmanager manager = getsupportfragmentmanager();           manager.begintransaction()                 .replace(r.id.frag_container, fragment)                 .commit();      } } 

also, in fragment code, expecting bundle. make sure check if bundle not null. since above code, not passing data (setarguments).

hope helps!