我需要从Facebook下载视频。为了下载视频，我需要来自Webview的视频网址，我正在加载Facebook页面，用户可以登录
我尝试过以下方法来实现这一目标，但没有任何工作
1 Link 1
2 Link 2
我试图在webview中从html获取视频标签，但它没有用，因为当我们点击webview上的视频时，我们无法获得任何html字符串
以下是我在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;
}
}
任何帮助将不胜感激!!
答案 0 :(得分：5)
@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();
}
}