Is it possible to redirect a parameter of a json?

Is it possible to redirect a parameter from an iframe-generated% s and redirect to a url with WebView? Example I have a webview and the site asks to put the data type and mail and password and when the user puts the data generates a code json with the data if the data is correct will generate a json with the json and the system automatically identifies the json key and redirects with the generated key {login: success, key: AB1005} is it even possible to do this with Java?