实现对webview的通知

Question

我想实现通知，例如每当有新内容添加到网站时，它会向用户发送通知或触发某些单词。如果您可以发布真正有用的代码，谢谢。

 public class NewsActivity extends AppCompatActivity {

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_news);
    String url = "https://www.example.com";
    WebView web = (WebView) findViewById(R.id.webView4);
    web.loadUrl(url);

    final WebView mWebView = (WebView) findViewById(R.id.webView4);
    mWebView.getSettings().setJavaScriptEnabled(true);
    mWebView.setScrollBarStyle(View.SCROLLBARS_INSIDE_OVERLAY);
    mWebView.getSettings().setSavePassword(true);
    mWebView.getSettings().setSupportZoom(true);
    mWebView.getSettings().setSaveFormData(true);
    mWebView.getSettings().setSupportZoom(false);
    mWebView.getSettings().setCacheMode(WebSettings.LOAD_NO_CACHE);
    mWebView.getSettings().setDomStorageEnabled(true);
    mWebView.getSettings().setSupportMultipleWindows(false);
    mWebView.getSettings().setLightTouchEnabled(true);
    mWebView.getSettings().setBuiltInZoomControls(true);
mWebView.getSettings().setLayoutAlgorithm(WebSettings.LayoutAlgorithm.NORMAL);

   webview.setWebViewClient(new WebViewClient() {
   public boolean shouldOverrideUrlLoading (WebView view, String url){
   return true;   }
 });
    mWebView.loadUrl("https://www.example.com");
}}