render() {

let pic = {

  uri: 'http://www.userlogin.php?username=react&password=react@123'

   };
return (

  <WebView
    automaticallyAdjustContentInsets={false}
    scalesPageToFit={false}
    source={{uri:pic.uri}}
  />
);

render() {
var usr=getUsername();
var pass=getPassword();
let pic = {

  uri: 'http://userlogin.php?username='+usr+'&password='+pass

   };
return (

  <WebView
    automaticallyAdjustContentInsets={false}
    scalesPageToFit={false}
    source={{uri:pic.uri}}
  />
);