android - Fragment webview back button not working -

at navigationdrawer menu , clicking search opens specific webview in fragment . works fine, when press on webview - instead of getting last visited webscreen comes main fragment. how can solve this? i'm providing fragment java file here. please mention other codes need (if needed) solve problem

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public class googlefragment extends fragment {  public webview mwebview;  @override public view oncreateview(layoutinflater inflater, viewgroup container,                          bundle savedinstancestate) {      view v = inflater.inflate(fragment_google, container, false);     mwebview = (webview) v.findviewbyid(webview);     mwebview.loadurl("https://google.com");      // enable javascript     websettings websettings = mwebview.getsettings();     websettings.setjavascriptenabled(true);     //improve webview performance     mwebview.getsettings().setrenderpriority(websettings.renderpriority.high);     mwebview.getsettings().setcachemode(websettings.load_cache_else_network);     mwebview.getsettings().setappcacheenabled(true);     mwebview.setscrollbarstyle(view.scrollbars_inside_overlay);     websettings.setdomstorageenabled(true);     websettings.setlayoutalgorithm(websettings.layoutalgorithm.narrow_columns);     websettings.setusewideviewport(true);     websettings.setsavepassword(true);     websettings.setsaveformdata(true);     websettings.setenablesmoothtransition(true);      // force links , redirects open in webview instead of in browser     mwebview.setwebviewclient(new webviewclient());      return v; }  } 

i think when press button fragment need handle inside of activity,

you need first override onbackpressed() method in main activity having fragment , global assign webview public in google fragment

note : when adding or replacing fragment keep adding tag, can helpful getting instance of fragment.

@override     public void onbackpressed() {      fragment fragment =       getfragmentmanager().findfragmentbytag("google_fragment");      if (fragment instanceof googlefragment) {         if (webview.cangoback()) {             webview.goback();         } else {             super.onbackpressed();         }     }else{        super.onbackpressed();     } }