Issue in loading URL in webview android

Issue

I need to show a login webpage link in webview and the link is something like below

url = "https://test-dev.test.com/as/authorization.oauth2?client_id=com.test.td&response=code&value=id test mail&redirect_uri=com.test.ap://oauth2/test"; 

[Modifed the actual URL with different names]

On this page, we have to enter username and password. Clicking on login will take you to OTP screen, after entering the OTP result will be a url response and from this I need to read the code. Using this code I have to make a request to get the authentication token for the session. For token request, response will be Json.

Now I need help in resolving the below:

1. Currently its opening in browser and not in webview. But other links are opening in webview within the app except the above link.
2. Which is the call back method for handling response from this transaction.

Below is my code:

private WebView webView;

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
    webView = (WebView) findViewById(R.id.webView);
    webView.setWebViewClient(new MyWebViewClient());
    WebSettings settings = webView.getSettings();
    settings.setJavaScriptEnabled(true);
    webView.loadUrl(getAuthorizationURL());
    webView.setHorizontalScrollBarEnabled(false);
    webView.setWebContentsDebuggingEnabled(true);
    //  webView.addJavascriptInterface(new MyJavaScriptInterface(this), "HtmlViewer");    
}


    private String getAuthURL() {
    Uri.Builder builder = new Uri.Builder();
    builder.scheme("https")
            .authority("test-dev.test.com")
            .appendPath("ta/authorization.oauth2")
            .appendQueryParameter("client_id", "com.test.td")
            .appendQueryParameter("response", "code")
            .appendQueryParameter("value", "id test mail").appendQueryParameter("redirect_uri", "com.test.ap://oauth2/test")

    String url = Uri.decode(builder.build().toString());

    //url = "https://www.google.com/";
    // url = "https://developers.google.com/webmaster-tools/search-console-api/about";

    return url;
}


 private class MyWebViewClient extends WebViewClient {
    @Override
    public boolean shouldOverrideUrlLoading(WebView webView, String url) {

        System.out.println(" shouldOverrideUrlLoading :============ " + Uri.parse(url).getHost() + " url " + url);

        //            if(url.contains("dev.test.com")){
        //                webView.loadUrl(url);
        //                return false;
        //            }
        Intent i = new Intent(Intent.ACTION_VIEW, Uri.parse(url));
        startActivity(i);
        return true;
    }
}

Solution

This sounds like you're doing an OpenID authentication. You're implementation of shouldOverrideUrlLoading() is both firing an intent which will most likely go to the default web browser, and returning true. The return value tells Android whether you're taking control of loading the page (true) or leaving it to the web view (false). If you don't take control of handling the URL, the web view will try to load it like a normal page.

You're also immediately directing the web view to your authorization URL in your onCreate code. I'm thinking this is part of the confusion over the navigation behavior you're seeing.

For this kind of authentication process, you don't want to override loading the OTP page. Let the web view handle that just like anything else. What you want to do is capture the URL response. Your if statement within shouldOverrideUrlLoading should trap the response URL, consume the contents, and respond true to let the web view know you've taken care of that URL. Everything else should be handled by the web view.

Finally, the commented version of the code looks to me like it would send you into an infinite loop, the way you have it written. You're telling the web view to load the authorization URL, which will lead back to your web client code, which will trap the URL, causing it to load the URL...

Answered By - Hod