Get href value from anchor tag in Android WebView when link is clicked

Question

I am loading a webpage in WebView. There is a link in the webpage, which on desktop will download the file, but in the app the link should display a Toast saying the link is disabled for the app.

I am not sure how to get the value from href of the anchor tag, when the link is clicked.

<a class="btn btn-primary" download="http://xx.xxx.com/wp-content/uploads/2015/11/abc-27-15.mp3" href="http://xx.xxx.com/wp-content/uploads/2015/11/abc-27-15.mp3">
<i class="fa fa-download"></i> Download Audio</a>

Can someone share an idea or any sample code on how to do this.

EDIT:1

Here is what I am doing currently:

private static final String URL = "http://xx.xxx.com/wp-content/uploads/";

webView.setOnTouchListener(new View.OnTouchListener() {
            @Override
            public boolean onTouch(View v, MotionEvent event) {

                if (event.getAction() == MotionEvent.ACTION_DOWN) {

                    WebView.HitTestResult hr = ((WebView) v).getHitTestResult();
                    String extra = hr.getExtra();

                    if (extra != null && extra.startsWith(URL) && extra.endsWith(".mp3")) {
                        Log.d("WebviewActivity", "Extra: " + extra);
                        Log.d("WebviewActivity", "Contains URL");

                        return true;
                    } 
                }

                return false;
            }
        });

The problem with this approach is: When i click on the link, i get the url in extra. It works fine till here. But, from next time, no matter where i click on the webview, the same extra is being returned. So even if i click on an image after i click on the url, i get the same url in the extra. Not sure if i doing anything wrong. Or is this the correct approach.

Please let me know if you need any details.

EDIT:2

private Handler mHandler = new Handler() {

        @Override
        public void handleMessage(Message msg) {
            // Get link-URL.
            String url = (String) msg.getData().get("url");

            // Do something with it.
            if (url != null) {
                Log.d(TAG, "URL: "+url);
            }
        }
    };



        webView.setOnTouchListener(new View.OnTouchListener() {
            @Override
            public boolean onTouch(View v, MotionEvent event) {

                if (event.getAction() == MotionEvent.ACTION_DOWN) {

                    WebView.HitTestResult hr = ((WebView) v).getHitTestResult();


                    if (hr.getType() == WebView.HitTestResult.SRC_ANCHOR_TYPE) {

                        Message msg = mHandler.obtainMessage();
                        webView.requestFocusNodeHref(msg);
                    }


                }

                return false;
            }
        });



        webView.loadUrl(mUrl);

    }

Now, i get the URL that is clicked in the last action_down event. How to get the current URL?

EDIT 3 (Attempt with webviewclient:

 private class MyWebViewClient extends WebViewClient {

        private static final String URL = "xx.xxx.com/wp-content/uploads/";

        @Override
        public void onPageStarted(WebView view, String url, Bitmap favicon) {
            super.onPageStarted(view, url, favicon);

            if (!isFinishing())
                mProgressDialog.show();
        }

        @Override
        public void onPageFinished(WebView view, String url) {
            super.onPageFinished(view, url);
            mProgressDialog.dismiss();
        }

        @Override
        public void onReceivedError(WebView view, int errorCode,
                                    String description, String failingUrl) {
            super.onReceivedError(view, errorCode, description, failingUrl);

            Toast.makeText(WebviewActivity.this,
                    "Please check your internet " + "connection and try again",
                    Toast.LENGTH_SHORT).show();
        }


        @Override
        public boolean shouldOverrideUrlLoading(WebView view, String url) {

            Log.d("xxx", "Url: " + url);

            if(url.contains(URL)) {
                Log.d("xxx", "Url Contains: " + URL);
                return true;
            }

            return false;
        }

    }


mMyWebViewClient = new MyWebViewClient();
        webView.setWebViewClient(mMyWebViewClient);

Output in logcat when the link is clicked:

03-01 15:38:19.402 19626-19626/com.xx.xxx D/cr_Ime: [ImeAdapter.java:553] focusedNodeChanged: isEditable [false]
03-01 15:38:19.428 19626-19626/com.xx.xxx D/cr_Ime: [ImeAdapter.java:253] updateKeyboardVisibility: type [0->0], flags [0], show [true], 
03-01 15:38:19.428 19626-19626/com.xx.xxx D/cr_Ime: [ImeAdapter.java:326] hideKeyboard
03-01 15:38:19.429 19626-19626/com.xx.xxx D/cr_Ime: [InputMethodManagerWrapper.java:56] isActive: true
03-01 15:38:19.429 19626-19626/com.xx.xxx D/cr_Ime: [InputMethodManagerWrapper.java:65] hideSoftInputFromWindow

Answer 1

Because you are using a WebView and the link is not Java script this is very easy to achieve with a WebViewClient which you can use to monitor your WebView

myWebView.setWebViewClient( new WebViewClient() {

    @Override
    public boolean shouldOverrideUrlLoading(WebView view, String url) {
        // check something unique to the urls you want to block
        if (url.contains("xx.xxx.com")) {
            Toast.make... //trigger the toast
            return true; //with return true, the webview wont try rendering the url
        }
        return false; //let other links work normally
    }

} );

It's possible that because your URL ends in .mp3 the file is being treated as a resource. You should also override the shouldInterceptRequest method of the WebViewClient to check this.

@Override
@TargetApi(Build.VERSION_CODES.LOLLIPOP)
public WebResourceResponse shouldInterceptRequest(WebView view, WebResourceRequest request) { 
    String url = request.getUrl().toString();
    Log.d("XXX", "Url from API21 shouldInterceptRequest : " + url);
    if (url.contains(URL)) { 
        return new WebResourceResponse("text/html", "UTF-8", "<html><body>No downloading from app</body></html>");
    } else {
        return null;
    }
}

public WebResourceResponse shouldInterceptRequest (WebView view, String url) {
    Log.d("XXX", "Url from shouldInterceptRequest : " + url);
    if (url.contains(URL)) { 
        return new WebResourceResponse("text/html", "UTF-8", "<html><body>No downloading from app</body></html>");
    } else {
        return null;
    }
}