[WebView]shouldOverrideUrlLoading

// Set the web view client
main_webview.setWebViewClient(new WebViewClient() {
    // For api level bellow 24
    @Override
    public boolean shouldOverrideUrlLoading(WebView view, String url) {
        if (url.startsWith("http")) {
            // Return false means, web view will handle the link
            return false;
        } else if (url.startsWith("tel:")) {
            // Handle the tel: link
            handleTelLink(url);

            // Return true means, leave the current web view and handle the url itself
            return true;
        }

        return false;
    }


    // From api level 24
    @Override
    public boolean shouldOverrideUrlLoading(WebView view, WebResourceRequest request) {
        // Get the tel: url
        String url = request.getUrl().toString();

        if (url.startsWith("http")) {
            // Return false means, web view will handle the link
            return false;
        } else if (url.startsWith("tel:")) {
            // Handle the tel: link
            handleTelLink(url);

            // Return true means, leave the current web view and handle the url itself
            return true;
        }
        return false;
    }
});

api level 24 이상은 shouldOverrideUrlLoading(WebView view, WebResourceRequest request)

미만은 shouldOverrideUrlLoading(WebView view, String url)

사용