java – webView.canGoBack() always false

I have a problem with Android Web View.
When I override the function shouldOverrideUrlLoading in my class that extends WebViewClient then WebView.canGoBack() returns always false.

Below is my code

public class SMWebViewClient extends WebViewClient {

   @Override
   public boolean shouldOverrideUrlLoading(WebView view, WebResourceRequest request) {
      view.loadUrl(request.getUrl().toString());
      return true;
   }

   @Override
   public boolean shouldOverrideUrlLoading(WebView view, String uri) {
      view.loadUrl(uri);
      return true;
   }
}

And in the my activity:

@BindView(R.id.main_webview) SMWebView webView;

@Override
protected void onCreate(Bundle savedInstanceState) {

    ...
    webView.setWebViewClient(new SMWebViewClient(){
        @Override
        public void onPageFinished(WebView view, String url){

        }
    });
    webView.clearCache(true);
    webView.clearHistory();
    webView.loadUrl(Constant.baseUrl + Constant.homeUrl);
}

The problem is that the function webView.canGoBack (always in my activity) returns always false:

    @Override
    public void onBackPressed() {
       //ALWAYS FALSE
       if (webView.canGoBack()) {
          webView.goBack();
       }
    } 

If I don’t override shouldOverrideUrlLoading, than onBackPressed works as expected. What is wrong in my code?

Thanks

[EDIT]: I also tried (without success) to create webViewClient in this way:

ebView.setWebViewClient(new SMWebViewClient());

Answer：

Tags: javajava, view, webview