java - How to get the Html body content only from the current url loaded in webview android -

i beginner android developer. need develop android project. there task load website url webview , content of html tag more time tried source code content webview can't correct solution internet please give solution develop project

that below ..

public class htmlviewactivity extends activity {

@override protected void oncreate(bundle savedinstancestate) {     super.oncreate(savedinstancestate);     setcontentview(r.layout.main);     final webview webview = (webview) findviewbyid(r.id.webview1);     webview.getsettings().setjavascriptenabled(true);     webview.addjavascriptinterface(new myjavascriptinterface(this), "htmlviewer");      webview.setwebviewclient(new webviewclient() {         @override         public void onpagefinished(webview view, string url) {             webview.loadurl("javascript:window.htmlviewer.showhtml" +                     "(document.getelementsbytagname('body')[0].innerhtml);");         }     });      webview.loadurl("http://www.google.com"); }  class myjavascriptinterface {      private context ctx;      myjavascriptinterface(context ctx) {         this.ctx = ctx;     }      public void showhtml(string html) {         toast.maketext(getapplicationcontext(), html, toast.length_long).show();         new alertdialog.builder(ctx).settitle("html code").setmessage(html)                 .setpositivebutton(android.r.string.ok, null).setcancelable(false).create().show();     }  } 

}