在android片段webview上实现后退按钮

Question

I want to implement back button for my webview fragment, tried different answers on stackoverflow, couldnt get it to work with my code.

Below is my code.

public class LoginFragment extends Fragment {

    public LoginFragment(){}

    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container,
                             Bundle savedInstanceState) {

        View rootView = inflater.inflate(R.layout.fragment_login, container, false);

        WebView webView = (WebView) rootView.findViewById(R.id.webView);
        webView.getSettings().setJavaScriptEnabled(true);
        webView.setWebViewClient(new WebViewClient());
        webView.loadUrl("http://example.com/");

        return rootView;
    }
}

I even tried this, found it at developer.android.com

public boolean WebViewGoBack() {
    if(webView.canGoBack()){
       webView.goBack();
       return true;
    }
    return false; 
}

Thanks for any help.

Answer 1

Try this:

@Override
public void onBackPressed() { 
    if (webView.canGoBack()) { //Gets whether this WebView has a back history item.
        webView.goBack(); //this takes to the previous page
    } else { 
        super.onBackPressed();// it finishes the current activity
    }
}

Answer 2

public class LoginFragment extends Fragment {

public LoginFragment(){}

@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
                         Bundle savedInstanceState) {

    View rootView = inflater.inflate(R.layout.fragment_login, container, false);

    WebView webView = (WebView) rootView.findViewById(R.id.webView);
    webView.getSettings().setJavaScriptEnabled(true);
    webView.setWebViewClient(new WebViewClient());
    webView.loadUrl("http://example.com/");

    webView.setOnKeyListener(new OnKeyListener(){

        public boolean onKey(View v, int keyCode, KeyEvent event) {
              if ((keyCode == KeyEvent.KEYCODE_BACK) && webView.canGoBack()) {
                    handler.sendEmptyMessage(1);
                    return true;
                }
                return false;
        }
    });
    return rootView; 
}       
}
}