android - Get video url from Facebook in WebView

Question

I need to download video from Facebook. In order to download video i need video url from Webview where i am loading the Facebook Page and user get login I have tried following approaches to achieve this but none of its work

1.Link 1

2.Link 2

I tried to get video tag from html in webview but it didnt work because when we click on video on webview we are not able to get any html string

Following is the code i have tried so far in WebViewActivity

        public class WebViewActivity extends BaseActivity {
            private static final String TAG = WebViewActivity.class.getSimpleName();

            @Override
            protected void onCreate(@Nullable Bundle savedInstanceState) {
                super.onCreate(savedInstanceState);

                WebView webview = new WebView(this);
                webview.setWebChromeClient(new WebChromeClient());
                WebViewClient client = new ChildBrowserClient();
                webview.setWebViewClient(client);
                WebSettings settings = webview.getSettings();
                settings.setJavaScriptEnabled(true);
                webview.setInitialScale(1);
                webview.getSettings().setUseWideViewPort(true);
                settings.setJavaScriptCanOpenWindowsAutomatically(false);
                settings.setBuiltInZoomControls(true);
                settings.setPluginState(WebSettings.PluginState.ON);
                settings.setDomStorageEnabled(true);
                webview.loadUrl("http://m.facebook.com");
                webview.setId(5);
                webview.setInitialScale(0);
                webview.requestFocus();
                webview.requestFocusFromTouch();
                setContentView(webview);
            }

         public class ChildBrowserClient extends WebViewClient {
            @SuppressLint("InlinedApi")
            @Override
            public boolean shouldOverrideUrlLoading(WebView view, String url) {
                boolean value = true;
                String extension = MimeTypeMap.getFileExtensionFromUrl(url);
                if (extension != null) {
                    MimeTypeMap mime = MimeTypeMap.getSingleton();
                    String mimeType = mime.getMimeTypeFromExtension(extension);
                    if (mimeType != null) {
                        if (mimeType.toLowerCase().contains("video")
                                || extension.toLowerCase().contains("mov")
                                || extension.toLowerCase().contains("mp4")) {
                            DownloadManager mdDownloadManager = (DownloadManager) WebViewActivity.this
                                    .getSystemService(Context.DOWNLOAD_SERVICE);
                            DownloadManager.Request request = new DownloadManager.Request(
                                    Uri.parse(url));
                            File destinationFile = new File(
                                    Environment.getExternalStorageDirectory(),
                                    getFileName(url));
                            request.setDescription("Downloading via Your app name..");
                            request.setNotificationVisibility(DownloadManager.Request.VISIBILITY_VISIBLE_NOTIFY_COMPLETED);
                            request.setDestinationUri(Uri.fromFile(destinationFile));
                            mdDownloadManager.enqueue(request);
                            value = false;
                        }
                    }
                    if (value) {
                        view.loadUrl(url);
                    }
                }
                return value;
            }

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

            /**
             * Notify the host application that a page has started loading.
             *
             * @param view The webview initiating the callback.
             * @param url  The url of the page.
             */
            @Override
            public void onPageStarted(WebView view, String url, Bitmap favicon) {
                super.onPageStarted(view, url, favicon);
            }
        }

        /**
         * File name from URL
         *
         * @param url
         * @return
         */
        public String getFileName(String url) {
            String filenameWithoutExtension = "";
            filenameWithoutExtension = String.valueOf(System.currentTimeMillis()
                    + ".mp4");
            return filenameWithoutExtension;
        }
 }

Any Help will be appreciated !!

Answer 1

@Override
protected void onCreate(Bundle savedInstanceState)
{
    super.onCreate(savedInstanceState);
    setContentView(R.layout.main);

    webView = (WebView)findViewById(R.id.webView);
    webView.getSettings().setJavaScriptEnabled(true);
    webView.getSettings().setPluginState(WebSettings.PluginState.ON);
    webView.getSettings().setBuiltInZoomControls(true);
    webView.getSettings().setDisplayZoomControls(true);
    webView.getSettings().setUseWideViewPort(true);
    webView.getSettings().setLoadWithOverviewMode(true);
    webView.addJavascriptInterface(this, "FBDownloader");
    webView.setWebViewClient(new WebViewClient() {
            @Override
            public void onPageFinished(WebView view, String url)
            {
                if (swipeLayout.isRefreshing())
                {
                    swipeLayout.setRefreshing(false);
                }

                webView.loadUrl("javascript:(function() { "
                                + "var el = document.querySelectorAll('div[data-sigil]');"
                                + "for(var i=0;i<el.length; i++)"
                                + "{"
                                + "var sigil = el[i].dataset.sigil;"
                                + "if(sigil.indexOf('inlineVideo') > -1){"
                                + "delete el[i].dataset.sigil;"
                                + "var jsonData = JSON.parse(el[i].dataset.store);"
                                + "el[i].setAttribute('onClick', 'FBDownloader.processVideo("'+jsonData['src']+'");');"
                                + "}" + "}" + "})()");
            }

            @Override
            public void onLoadResource(WebView view, String url)
            {
                webView.loadUrl("javascript:(function prepareVideo() { "
                                + "var el = document.querySelectorAll('div[data-sigil]');"
                                + "for(var i=0;i<el.length; i++)"
                                + "{"
                                + "var sigil = el[i].dataset.sigil;"
                                + "if(sigil.indexOf('inlineVideo') > -1){"
                                + "delete el[i].dataset.sigil;"
                                + "console.log(i);"
                                + "var jsonData = JSON.parse(el[i].dataset.store);"
                                + "el[i].setAttribute('onClick', 'FBDownloader.processVideo("'+jsonData['src']+'","'+jsonData['videoID']+'");');"
                                + "}" + "}" + "})()");
                webView.loadUrl("javascript:( window.onload=prepareVideo;"
                                + ")()");
            }
        });

    CookieSyncManager.createInstance(this);
    CookieManager cookieManager = CookieManager.getInstance();
    cookieManager.setAcceptCookie(true);
    CookieSyncManager.getInstance().startSync();

    webView.loadUrl(target_url);
}

@JavascriptInterface
public void processVideo(final String vidData, final String vidID)
{
    try
    {
        String mBaseFolderPath = android.os.Environment
            .getExternalStorageDirectory()
            + File.separator
            + "FacebookVideos" + File.separator;
        if (!new File(mBaseFolderPath).exists())
        {
            new File(mBaseFolderPath).mkdir();
        }
        String mFilePath = "file://" + mBaseFolderPath + "/" + vidID + ".mp4";

        Uri downloadUri = Uri.parse(vidData);
        DownloadManager.Request req = new DownloadManager.Request(downloadUri);
        req.setDestinationUri(Uri.parse(mFilePath));
        req.setNotificationVisibility(DownloadManager.Request.VISIBILITY_VISIBLE_NOTIFY_COMPLETED);
        DownloadManager dm = (DownloadManager) getSystemService(getApplicationContext().DOWNLOAD_SERVICE);
        dm.enqueue(req);
        Toast.makeText(this, "Download Started", Toast.LENGTH_LONG).show();
    }
    catch (Exception e)
    {
        Toast.makeText(this, "Download Failed: " + e.toString(), Toast.LENGTH_LONG).show();
    }
}