android - Web page not Avaible Go another class or show an image -

1-)i have webview project.sometimes im forgot internet connect.and showing webpage not available.when if want go class or show error.xml bad displaying. all.

public void oncreate(bundle savedinstancestate) {         super.oncreate(savedinstancestate);         setcontentview(r.layout.webplayer);         customviewcontainer = (framelayout) findviewbyid(r.id.customviewcontainer);         webview = (webview) findviewbyid(r.id.webview);         adview adview = (adview) this.findviewbyid(r.id.adview);         adrequest adrequest = new adrequest.builder().build();         adview.loadad(adrequest);            mwebviewclient = new mywebviewclient();         webview.setwebviewclient(mwebviewclient);            mwebchromeclient = new mywebchromeclient();         webview.setwebchromeclient(mwebchromeclient);         webview.getsettings().setjavascriptenabled(true);         webview.getsettings().setappcacheenabled(true);         webview.getsettings().setbuiltinzoomcontrols(true);         webview.getsettings().setsaveformdata(true);         intent = getintent();         string url = i.getstringextra("url");  // retrieve value passed         if (savedinstancestate != null) {             webview.restorestate(savedinstancestate);         } else {                 webview.loadurl(url);  // use value         }             }    public boolean incustomview() {         return (mcustomview != null);     }      public void hidecustomview() {         mwebchromeclient.onhidecustomview();     }            protected void onpause() {         super.onpause();    //to change body of overridden methods use file | settings | file templates.         webview.onpause();     }            protected void onresume() {         super.onresume();    //to change body of overridden methods use file | settings | file templates.         webview.onresume();     }      @override     protected void onstop() {         super.onstop();    //to change body of overridden methods use file | settings | file templates.         if (incustomview()) {             hidecustomview();         }     }             public boolean onkeydown(int keycode, keyevent event) {         if (keycode == keyevent.keycode_back) {              if (incustomview()) {                 hidecustomview();                 return true;             }              if ((mcustomview == null) && webview.cangoback()) {                 webview.goback();                 return true;             }         }         return super.onkeydown(keycode, event);     }      class mywebchromeclient extends webchromeclient {         private bitmap mdefaultvideoposter;         private view mvideoprogressview;           public void onshowcustomview(view view, int requestedorientation, customviewcallback callback) {            onshowcustomview(view, callback);    //to change body of overridden methods use file | settings | file templates.         }         public void onshowcustomview(view view,customviewcallback callback) {              // if view exists terminate new 1             if (mcustomview != null) {                 callback.oncustomviewhidden();                 return;             }             mcustomview = view;             webview.setvisibility(view.gone);             customviewcontainer.setvisibility(view.visible);             customviewcontainer.addview(view);             customviewcallback = callback;         }                        public view getvideoloadingprogressview() {                if (mvideoprogressview == null) {                 layoutinflater inflater = layoutinflater.from(webplayer.this);                 mvideoprogressview = inflater.inflate(r.layout.video_progress, null);             }             return mvideoprogressview;         }         @override         public void onhidecustomview() {             super.onhidecustomview();    //to change body of overridden methods use file | settings | file templates.             if (mcustomview == null)                 return;             webview.setvisibility(view.visible);             customviewcontainer.setvisibility(view.gone);              // hide custom view.             mcustomview.setvisibility(view.gone);              // remove custom view container.             customviewcontainer.removeview(mcustomview);             customviewcallback.oncustomviewhidden();                mcustomview = null;         }     }       @override     public void onhidecustomview() {         super.onhidecustomview();    //to change body of overridden methods use file | settings | file templates.         if (mcustomview == null)             return;          webview.setvisibility(view.visible);         customviewcontainer.setvisibility(view.gone);          // hide custom view.         mcustomview.setvisibility(view.gone);          // remove custom view container.         customviewcontainer.removeview(mcustomview);         customviewcallback.oncustomviewhidden();          mcustomview = null;      } }  class mywebviewclient extends webviewclient {     @override     public boolean shouldoverrideurlloading(webview view, string url) {         return super.shouldoverrideurlloading(view, url);    //to change body of overridden methods use file | settings | file templates.     } 

this easy

you can check internet conncection before requesting url

 final connectivitymanager connmgr = (connectivitymanager) yourclass.this             .getsystemservice(context.connectivity_service);      final android.net.networkinfo wifi = connmgr             .getnetworkinfo(connectivitymanager.type_wifi);      final android.net.networkinfo mobile = connmgr             .getnetworkinfo(connectivitymanager.type_mobile);      if (wifi.isconnected() || mobile.isconnected()) {   webview.loadurl(url);    }else{ setcontentview(r.layout.your); } 

//required permissions

add these permissions manifest file

 <uses-permission android:name="android.permission.access_wifi_state" /> <uses-permission android:name="android.permission.access_network_state" /> 

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