title: change function of a button in webView
body: <p>I load a web URL in webView. I want to change the functionality of specific button     of web.who i access to button and change its functionality?</p>
  
  <pre><code>public class MainActivity extends AppCompatActivity {
      WebView mWebView;
      String URl = "http://comingup.review/user";
  
      @Override
      protected void onCreate(Bundle savedInstanceState) {
          super.onCreate(savedInstanceState);
          setContentView(R.layout.activity_main);
  
          getSupportActionBar().hide();
  
          mWebView = (WebView) findViewById(R.id.webView);
  
  
          WebSettings webSettings = mWebView.getSettings();
          webSettings.setJavaScriptEnabled(true);
          mWebView.loadUrl(URl);
          mWebView.setWebViewClient(new WebViewClient()
          );
      }
  
      @Override
      public void onBackPressed() {
          if (mWebView.canGoBack()) {
              mWebView.goBack();
          } else {
              super.onBackPressed();
          }
      }
  }
  </code></pre>