android - Adding ProgressBar into WebView Fragment -

i'm finishing app, simple app contains webview fragments , navigation drawer, ok, don't know how add progress bar while webview loading page, got blank screen before page loads.

here code...

homefragment.java

public class homefragment extends fragment {   private webview webview;   public homefragment() {     // required empty public constructor }  @override public void onattach(activity activity) {     super.onattach(activity); }  @override public void oncreate(bundle savedinstancestate) {     super.oncreate(savedinstancestate); }    @override public view oncreateview(layoutinflater inflater, viewgroup container,                          bundle savedinstancestate) {     view mainview = (view) inflater.inflate(r.layout.fragment_my_fragment1, container, false);     webview webview = (webview)mainview.findviewbyid(r.id.webview);     webview.setwebviewclient(new mantenerdominioweb());     webview.getsettings().setjavascriptenabled(true);     webview.getsettings().setbuiltinzoomcontrols(false);     webview.getsettings().setsupportzoom(false);     webview.getsettings().setjavascriptcanopenwindowsautomatically(true);     webview.getsettings().setallowfileaccess(true);     webview.getsettings().setdomstorageenabled(true);     webview.cangoback();     webview.goback();     webview.loadurl("http://www.lfcchile.com/");     return mainview;   }    @override public void onactivitycreated(bundle savedinstancestate) {     super.onactivitycreated(savedinstancestate); }  @override public void ondestroy() {     super.ondestroy(); }  @override public void ondetach() {     super.ondetach(); } } 

my webviewclient class

public class mantenerdominioweb extends webviewclient {  private webview webview; public progressbar progressbart4;   @override public boolean shouldoverrideurlloading(webview view, string url) {     if (uri.parse(url).gethost().endswith("lfcchile.com") || (uri.parse(url).gethost().endswith("thisisanfield.com")) || (uri.parse(url).gethost().endswith("liverpoolecho.co.uk")) || (uri.parse(url).gethost().endswith("liverpoolfc.com"))) {         return false;     }      intent intent = new intent(intent.action_view, uri.parse(url));     view.getcontext().startactivity(intent);     return true; }  } 

and frame xml

<framelayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:tools="http://schemas.android.com/tools" android:layout_width="match_parent" android:layout_height="match_parent" tools:context="com.lfcchile.myfragment1">  <!-- todo: update blank fragment layout --> <textview android:layout_width="match_parent" android:layout_height="match_parent"     android:gravity="center"     android:text="@string/homefrag" />  <webview     android:id="@+id/webview"     android:layout_width="fill_parent"     android:layout_height="fill_parent" />  <progressbar android:layout_height="wrap_content" android:layout_width="wrap_content" android:layout_gravity="center" android:id="@+id/progressbar1"/>  </framelayout> 

any ideas please? tried put progressbar "in front" of webview, when page loaded icon doesn't dissapear...

i believe not possible put progressbar because each site has size, difficult measure before finalizing download page.

but can place pre-loader (loading) while page loaded , after end remove access user.

use progressdialog:

public class homefragment extends fragment {  private progressdialog progress; private webview webview;   public homefragment() {     // required empty public constructor }  @override public void onattach(activity activity) {     super.onattach(activity); }  @override public void oncreate(bundle savedinstancestate) {     super.oncreate(savedinstancestate); }    @override     public view oncreateview(layoutinflater inflater, viewgroup container,                              bundle savedinstancestate) {         view mainview = (view) inflater.inflate(r.layout.fragment_my_fragment1, container, false);         webview webview = (webview)mainview.findviewbyid(r.id.webview);         webview.setwebviewclient(new mantenerdominioweb());         webview.getsettings().setjavascriptenabled(true);         webview.getsettings().setbuiltinzoomcontrols(false);         webview.getsettings().setsupportzoom(false);         webview.getsettings().setjavascriptcanopenwindowsautomatically(true);         webview.getsettings().setallowfileaccess(true);         webview.getsettings().setdomstorageenabled(true);         webview.cangoback();         webview.goback();         webview.loadurl("http://www.lfcchile.com/");          progress = progressdialog.show(this, "aguarde...",                     "processando sua solicitação.", true);         webview.setwebviewclient(new webviewclient() {             public void onpagefinished(webview view, string url) {                 if (progress != null)                     progress.dismiss();             }         });         return mainview;       }    @override public void onactivitycreated(bundle savedinstancestate) {     super.onactivitycreated(savedinstancestate); }  @override public void ondestroy() {     super.ondestroy(); }  @override public void ondetach() {     super.ondetach(); } }