I have a webview where external url will be launched and loaded in the webview.
So, I want to find what language the webpage is? is it possible in android webview?
After scanning the documentation it doesn't look like there's an explicit method in the WebView class that allows you to retrieve the language used by the web page.
An alternative way of finding out the language of a web page would be to download the raw HTML content of the page using the JSoup library and parsing it for the lang attribute. However, this would obviously require that the owner of the page specified that attribute when creating the page.
Here's a snippet of how you can use JSoup to get the raw HTML content of the page you're trying to load:
Document htmlDoc = Jsoup.connect("http://en.wikipedia.org/").get();
Then, to parse for the lang attribute (which is used to specify the natural language of the content found on the web page), you would do this (credit to this OP):
Element html = htmlDoc.select("html").first();
String langAttr = htmlDoc.attr("lang"); //check that this isn't null before using it
Hope this helps. But to answer your original question - no, the WebView class doesn't have an explicit method to obtain the language of a web page included out of the box.
Related
I load an HTML string directly into a WebView with loadDataWithBaseURL(null, html, null, null, null) and later I'd like to be able to scroll programmatically to an internal element, e.g. <p id="pos1"> or <a name="pos1"></a>
I found a similar question, where the answer was to use javascript:
https://stackoverflow.com/a/2239301/2534762
But is that really the only way? Isn't there another simple way to say directly to a WebView: "go to #pos1" without having to embed a script in every HTML page that you want to scroll? It seems to me a common task begging for a simple solution, but apparently I'm wrong... or is there a way to do that, maybe calling loadUrl or loadDataWithBaseURL in some particular way?
I found that I don't need to embed JavaScript in the HTML page, as suggested in that other answer, I can instead write one line of JavaScript directly in the URL:
webView.loadUrl("javascript:document.getElementById('"+aID+"').scrollIntoView()");
I want to match the user name text field inside a WebView which loads the Salesforce login page (but can also be applied to any other page with text fields).
I have tried with:
onView(withHint("User Name")).perform(typeText("test#sf.com"));
But that doesn't work. Any better idea?
This can be accomplished using Espresso Web 2.2 API
onWebView().withElement(findElement(Locator.ID,"username")).perform(webKeys("test#sf.com"));
Please use Locator.Xpath if you don't know ID.
To find xpath first you need to check the html code based on which you can write xpath.
To get html source code you can use chrome inspector.
connect the device to the PC and then open chrome inspector.You can right click on the html code and click on copy xpath to get the xpath.
You can fill form just run js code in WebView.
For example:
webView.loadUrl("
javascript:document.getElementById('username-field').value = 'test#sf.com’;
");
In my android app whole web page is loading in web view to which i gave the link, but I want to load only some component from that web page not rest of the component. Can anybody tell me is it possible to load only required component from web page and how?
It can be done using Jsoup html parsing library.
1.Get the data from url to jsoup document.
Document doc = Jsoup.connect("http://example.com/").get();
remove the unwanted content html tag using remove().
doc.select("span[style*=display:none]").remove(); //put unwanted tag inside.
Save the remaining content to a string.
String newcontent=doc.toString();
4 Set the newcontent as Webview content.
webView.loadDataWithBaseURL(null, newcontent, "text/html", "UTF-8", null);
Sorry for poor english.
I dont know if there is a standard api to do this, but if not you could load the html first then manipulate it. So you could delete the areas you dont need and only display the necessary parts.
Cheers
I want my Android application to use Webview to display an html form. When the user presses the Submit button, it want the name/value pairs sent back to my program. How do I do this?
I have looked at other similar questions but not of the responses tell how, specifically, to do this.
Look into the use of Javascript interfaces within WebView. Please see this area of the Android Developers Guide. Basically, you should be able to communicate from the page to the device with the Javascript interface and let your WebView Activity know when the submit button is pressed and send its values over.
I have found what I needed. If I set action='FORM" in the form html, then I can intercept the action with:
public void onLoadResource (WebView view, String url){
int index = url.indexOf("FORM?");
if (index != -1){
String d = URLDecoder.decode(url.substring(index+5));
}
}
The name/value pairs are in String d.
If you want to save Name/Value pairs and are willing to use jQuery then it's quite simple.
Assuming you put jQuery in your assets folder you can read it into a file from:
getResources().getAssets()
In the WebViewClient that you set (assuming you overrode the client) you can do:
view.loadUrl("javascript:" + escapedJqueryStringHere);
Then, make sure you have a JavascriptInterface configured for your webview with a method, for example, called 'ReturnJSONFromForm(String json)' configured for "MyJInterface" then load the form into the page and then try this:
webview.loadUrl("javascript:MyJInterface.ReturnJSONFromForm($(\"form\").serialize());");
Now in your interface, just create a JSONObject from the resultant string and there you go! Name/Value pairs from your form.
Serialize won't capture disabled fields or submit buttons.. if you need that, then a more complex javascript solution exists but it's far more difficult.
I am displaying a html in a custom activity with a webview. I am overriding
public boolean shouldOverrideUrlLoading(WebView view, String url) {
to intercept certain urls. Now I would like to be able to figure out some more details about the html around that url.
In my case I would like to get the html element that contains the url. E.g. if the url comes from
Manfred Moser
I would like to be able to somehow retrieve the value "Manfred Moser" from within the anchor tag. Is there a way to do that. I found that you do not have access to the DOM from Java.
One way I can think of would be to download the page separately and parse it all before even loading it in webview. However that is an ugly hack at best. Is there a better way?
There is a dirty hack:
Bind some Java object so that it can be called from Javascript with WebView:
addJavascriptInterface(javaObjectExposed, "JSname")
Force execute javascript within an existing page by
WebView.loadUrl("javascript:window.JSname.passData("some data");");
Described here: http://lexandera.com/2009/01/extracting-html-from-a-webview/
Note: this is a security risk - any JS code in this web page could access/call your binded Java object. Best to pass some one-time cookies to loadUrl() and pass them back your Java object to check that it's your code making the call.
In addition to #Peter Knego's approach, there is the inverse:
Use addJavascriptInterface(), per his step #1
For your link, use an onClick attribute on your <a> tag to call out some method on the Java object from step #1, where the Java object turns around and loads the URL into the WebView, and supplies whatever sort of identifying information you want.
Suffice it to say, there's no way to get the information you want from shouldOverrideUrlLoading().