WaveSwipeRefreshLayout | project aims to provide a reusable WaveSwipe | REST library

@RequiresApi(api = Build.VERSION_CODES.KITKAT)
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
   // setRetainInstance(true);

 if(view == null){
    view = inflater.inflate(R.layout.fragment_avicenna, container, false);
    mWebView = (WebView) view.findViewById(R.id.webview);
    swipeRefreshLayout = (WaveSwipeRefreshLayout) view.findViewById(R.id.swipeContainer);
    swipeRefreshLayout.setOnRefreshListener((WaveSwipeRefreshLayout.OnRefreshListener) WebFragment.this);
    mWebView.setWebViewClient(new WebViewClient() {
        @Override
        public void onPageStarted(WebView view, String url, Bitmap favicon) {
            super.onPageStarted(view, url, favicon);
            swipeRefreshLayout.setRefreshing(true);
        }

        public void onPageFinished(WebView view, String url) {
            swipeRefreshLayout.setRefreshing(false);
        }
    });
    BottomNavigationView bottomNavigationView=view.findViewById(R.id.bottom_navigation);
    bottomNavigationView.setOnNavigationItemSelectedListener(navListner);
    WebSettings webSettings = mWebView.getSettings();
    webSettings.setJavaScriptEnabled(true);
    webSettings.setAllowFileAccess(true);
    webSettings.setAppCacheEnabled(true);
    mWebView.getSettings().setSupportZoom(true);
    mWebView.getSettings().setBuiltInZoomControls(true);
    mWebView.getSettings().setDisplayZoomControls(false);
    mWebView.setWebViewClient(new Callback());
    if(savedInstanceState==null){
        loadWebsite();
    }
  }
    return view;
}