android - Hide WebView until JavaScript is done -

i have webview

webview wv; wv = (webview)findviewbyid(r.id.webview1); wv.loadurl("http://example.com/"); 

simply said.

at:

onpagefinished 

i have:

wv.loadurl("javascript:(function() { " + "document.getelementsbyclassname('centered leaderboard_container')[0].style.display = 'none'; " + "document.getelementsbyclassname('n')[0].style.display = 'none'; " + "document.getelementsbyclassname('paginator')[0].style.display = 'none'; " + "document.getelementsbytagname('ul')[0].style.display = 'none'; " + "document.getelementsbytagname('tr')[0].style.display = 'none'; " + "})()"); 

i've set webview visibility invisible

how can set visibility visible after javascript done?

now see whole page second , javascript done..

anyone?

ps. website not mine, 3rd party website

tested on api 17 emulator , works.

you can inject javascript java web.

and vice-versa, once url loaded call javascript function on our java code, , execute setvisibility(). purpose going add js interface.

here code:

private final static string host = "stackoverflow.com"; private webview wb;  @suppresslint("setjavascriptenabled") @override protected void oncreate(bundle savedinstancestate) {     super.oncreate(savedinstancestate);     requestwindowfeature(window.feature_no_title);     setcontentview(r.layout.activity_home);     wb = (webview) findviewbyid(r.id.home_webview);     //make webview invisible     wb.setvisibility(view.invisible);     websettings websettings = wb.getsettings();     websettings.setjavascriptenabled(true);     wb.setwebviewclient(new webviewclient(){         public void onpagefinished(webview view, string url){             //inject javascript code url given             //not display element             wb.loadurl("javascript:(function(){"+"document.getelementbyid('id').style.display ='none';"+"})()");             //call function defined on myjavascriptinterface              wb.loadurl("javascript: window.calltoanandroidfunction.setvisible()");         }                });      //add javascriptinterface, can make calls web java methods     wb.addjavascriptinterface(new myjavascriptinterface(), "calltoanandroidfunction");     wb.loadurl("http://"+host); }   public class myjavascriptinterface {      @javascriptinterface      public void setvisible(){          runonuithread(new runnable() {              @override             public void run() {                 wb.setvisibility(view.visible);                              }         });      }   } 

this functionality going executed every page. once on 3rd party server have manage every request, webclient.shouldoverrideurlloading() can you.

updated answer:

i reproduce commented, last version should do:

beginning in android 4.2, have explicitly annotate public methods @javascriptinterface in order make them accessible hosted javascript. note takes effect if have set app's minsdkversion or targetsdkversion 17 or higher.

i added , imported android.webkit.javascriptinterface

reference: javascriptinterface methods in webviews must annotated