android - app stops after scanning qr code -


i wants automatically navigate site after scanning qr code,hear code crashes after scanning qr code. 

import com.google.zxing.result; import me.dm7.barcodescanner.zxing.zxingscannerview;  public class mainactivity extends appcompatactivity implements zxingscannerview.resulthandler {     private zxingscannerview mscannerview;      @override     protected void oncreate(bundle savedinstancestate) {         super.oncreate(savedinstancestate);         setcontentview(r.layout.activity_main);      }      public void qrscanner(view view){           mscannerview = new zxingscannerview(this);   // programmatically initialize scanner view         setcontentview(mscannerview);          mscannerview.setresulthandler(this); // register ourselves handler scan results.         mscannerview.startcamera();         // start camera      }      @override     public void onpause() {         super.onpause();         mscannerview.stopcamera();           // stop camera on pause     }      @override     public void handleresult(result rawresult) {         // result here          log.e("handler", rawresult.gettext()); // prints scan results         log.e("handler", rawresult.getbarcodeformat().tostring()); // prints scan format (qrcode)           webview webview = (webview)this.findviewbyid(r.id.webview);         webview.getsettings().setjavascriptenabled(true);         webview.loaddatawithbaseurl("", rawresult.tostring(), "text/html", "utf-8", "");     } }


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