Android Google login not working inside WebView

Question

I am new to android development. Trying to integrate FB and Google+ login in Android web view. FB login is working fine. But Google login is not allowing to login. I referred a few links but unable to succeed.

Problem is after providing user name and password in Gmail my web site is not sign in

A webview overlay over another webview

Google sign in not working android webview app

Google sign in not working android webview app

private class MyCustomWebViewClient extends WebViewClient {
    @Override
    public boolean shouldOverrideUrlLoading(WebView view, String url) {
        String host = Uri.parse(url).getHost();
        Log.d("Loading URL", url);
        if (host.equals(target_url_prefix)) {
            // This is my web site, so do not override; let my WebView load
            // the page
            if (mWebviewPop != null) {
                mWebviewPop.setVisibility(View.GONE);
                mContainer.removeView(mWebviewPop);
                mWebviewPop = null;
            }
            return false;
        }

        if (host.contains("m.facebook.com") || host.contains("facebook.co")
                || host.contains("google.co")
                || host.contains("www.facebook.com")
                || host.contains(".google.com")
                || host.contains(".google")
                || host.contains("accounts.google.com/signin/oauth/consent")
                || host.contains("accounts.youtube.com")
                || host.contains("accounts.google.com")
                || host.contains("accounts.google.co.in")
                || host.contains("www.accounts.google.com")
                || host.contains("oauth.googleusercontent.com")
                || host.contains("content.googleapis.com")
                || host.contains("ssl.gstatic.com")
            //     || host.contains("https://accounts.google.com/signin/oauth/consent")

        ) {
            return false;
        }
        // Otherwise, the link is not for a page on my site, so launch
        // another Activity that handles URLs

        Intent intent = new Intent(Intent.ACTION_VIEW, Uri.parse(url));
        startActivity(intent);
        return true;
    }

    @Override
    public void onReceivedSslError(WebView view, SslErrorHandler handler, SslError error) {
        Log.d("onReceivedSslError", "onReceivedSslError");
        super.onReceivedSslError(view, handler, error);
    }

    @Override
    public void onPageFinished(WebView view, String url) {
        if (url.startsWith("https://m.facebook.com/v2.7/dialog/oauth")


        ) {
            if (mWebviewPop != null) {
                mWebviewPop.setVisibility(View.GONE);
                mContainer.removeView(mWebviewPop);
                mWebviewPop = null;
            }
            view.loadUrl("https://www.cbazaar.com");
            return;
        }

        super.onPageFinished(view, url);
    }
}

private class UriWebChromeClient extends WebChromeClient {

    @Override
    public boolean onCreateWindow(WebView view, boolean isDialog, boolean isUserGesture, Message resultMsg) {
        mWebviewPop = new WebView(mContext);
        mWebviewPop.setVerticalScrollBarEnabled(false);
        mWebviewPop.setHorizontalScrollBarEnabled(false);
        mWebviewPop.setWebViewClient(new MyCustomWebViewClient());
        mWebviewPop.setWebChromeClient(new UriWebChromeClient());
        mWebviewPop.getSettings().setJavaScriptEnabled(true);
        mWebviewPop.clearHistory();
        mWebviewPop.clearFormData();
        mWebviewPop.clearCache(true);
        mWebviewPop.getSettings().setSavePassword(true);
        mWebviewPop.getSettings().setSaveFormData(true);
        mWebviewPop.getSettings().setUserAgentString(USER_AGENT_FAKE);

        builder = new AlertDialog.Builder(MainActivity.this, AlertDialog.THEME_DEVICE_DEFAULT_LIGHT).create();

        builder.setTitle("");
        builder.setView(mWebviewPop);

        builder.setButton("close", new DialogInterface.OnClickListener() {
            @Override
            public void onClick(DialogInterface dialog, int id) {
                mWebviewPop.destroy();
                dialog.dismiss();

            }
        });

        builder.show();
        builder.getWindow().clearFlags(WindowManager.LayoutParams.FLAG_NOT_FOCUSABLE | WindowManager.LayoutParams.FLAG_ALT_FOCUSABLE_IM);

             /*   CookieManager cookieManager = CookieManager.getInstance();
                cookieManager.setAcceptCookie(true);
                if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {
                    cookieManager.setAcceptThirdPartyCookies(mWebviewPop,true);
                }
    */

        WebView.WebViewTransport transport = (WebView.WebViewTransport) resultMsg.obj;
        transport.setWebView(mWebviewPop);
        resultMsg.sendToTarget();

        return true;
    }


    @Override
    public void onCloseWindow(WebView window) {

        try {
            mWebviewPop.destroy();
        } catch (Exception e) {
        }

        try {
            builder.dismiss();

        } catch (Exception e) {
        }

    }

}

Answer 1

Google does not allow default implementations of WebView to be used. Therefore you need to set a custom User-Agent to your WebView:

webView.getSettings().setUserAgentString("YourAppName");

You can use any string instead of YourAppName.