Need help on Webview android app login storage

I am building a web app where I have created html files locally. in that html files i have written all api to interact with server. I am using AJAX JQUERY to fetch,insert,edit,delete. when login on that time it is successful but when user goto another screen it gets logged out. I need a code for keep login data stored locally in android. so that whenever user goto another page or after closing the app also user don't get logout. I just need the code. if require little telephone assistance.