If I have a webkit view loaded in my Android or iPhone app, can I pass data back and forth from the page in webkit?
For example, can I pull an html view down from the web and populate a form in that view with data stored on my device?
Yes in Android using addJavaScriptInterface().
class MyInterface {
private String someData;
public String getData() { return someData; }
}
webview.addJavaScriptInterface(new MyInterface(), "myInterface");
And in the html in your webview.
<script type="text/javascript">
var someData = myInterface.getData();
</script>
By the way, if the webpage you are using is not yours (so that you can't modify it), you can insert javascript inline. For instance:
webview.loadUrl("javascript:document.getElementById('someTextField').value = myInterface.getData();");
For iPhone you can call a JavaScript function from Objective-C by using stringByEvaluatingJavaScriptFromString.
For instance, to get the value of an input field named "fname":
NSString * fString =[webView stringByEvaluatingJavaScriptFromString:#"document.getElementByName(\"fname\").value"];
NSLog(#"fString: %#",fString);
Related
I've read that you can make a Google Apps Script that shows a Facebook Feed, and then embed this in a Google Site, but I can't find any more information on how to do it and I can't figure it out myself.
When I try to make an Apps Script web app with a Facebook feed I get errors like:
Uncaught DOMException: Failed to set the 'domain' property on 'Document': Assignment is forbidden for sandboxed iframes.
This is from copying the "Facebook Javascript SDK" and "Page Feed" from Facebook Developers into an HTML file and deploying it as a web app. I gather it has something to do with how Apps Script sandboxes your code but I don't know what I have to do here.
For that matter, even if I try to make a simpler Apps Script with some static HTML, when I try to embed it from Drive into the site I get an error "Some of the selected items could not be embedded".
The New Google Sites doesn't support Google Apps Script.
Related question: Google App Scripts For New Google Sites Release
The new Google Sites does now support embedding apps script (make sure to deploy the apps script as a web app, set the right permissions, and use the /exec url and not your /dev one to embed).
I found I couldn't use the facebook SDK for videos because of the sandboxing. I used an iframe solution instead for videos, but maybe you could try something like this for the feed (I'm assuming you've registered your app in fb so you can get generate tokens):
In apps script, create a .gs file and an html file, roughly along the lines below (I haven't actually worked with returning feeds, so check the returned data structure and adjust accordingly)
//**feed.gs**
function doGet(e) {
return HtmlService
.createTemplateFromFile('my-html-file')
.evaluate();
}
function getToken() { //use your fb app info here (and make sure this script is protected / runs as you
var url = 'https://graph.facebook.com'
+ '/oauth/access_token'
+ '?client_id=0000000000000000'
+ '&client_secret=0x0x0x0x0x0x0x0x0x0x0x0x'
+ '&grant_type=client_credentials';
var response = UrlFetchApp.fetch(url, {'muteHttpExceptions': true});
var json = response.getContentText();
var jsondata = JSON.parse(json);
return jsondata.access_token;
}
function getFeed() {
var url = 'https://graph.facebook.com'
+ '/your-page/feed'
+ '?access_token=' + encodeURIComponent(getToken());
var response = UrlFetchApp.fetch(url, {'muteHttpExceptions': true});
var json = response.getContentText();
var jsondata = JSON.parse(json);
//Logger.log(jsondata); //check this and adjust following for loop and html showFeed function accordingly
var posts = {};
for (var i in jsondata) {
posts[i] = {"post":jsondata[i].message};
}
return posts;
}
<!--**my-html-file.html**-->
<!DOCTYPE html>
<html>
<head>
<base target="_top">
<script src="//ajax.googleapis.com/ajax/libs/jquery/1.11.1/jquery.min.js"></script>
<script>
// The code in this function runs when the page is loaded (asynchronous).
$(function() {
google.script.run
.withSuccessHandler(showFeed)
.withFailureHandler(onFailure)
.getFeed(); //this function is back in .gs file and must return an array or object which gets auto-passed to the showFeed function below
});
function showFeed(posts) { //parameter name must match array or object returned by getFeed in gs file
var html = '';
for (var p in posts) {
html += '<p>' + posts[p].post + '</p>'; //instead of a string, you can build an array for speed
}
$('#feed').empty().append(html); //if you used an array for the html, you'd split it here
}
function onFailure(error) {
$('#feed').empty().append("Unable to retrieve feed: " + error.message); ;
}
</script>
</head>
<body>
<div id="feed">
Loading...
</div>
</body>
</html>
Is it possible to call a controller method to render a template within a template?
Or is that totally the wrong aproach?
In the div container there is only a sting displayed but not the redered html from my productTable template.
The displayed string inside the <div class="products">:
SimpleResult(200, Map(Content-Type -> text/html; charset=utf-8))
Template:
#categories.map {cat =>
<div>some html</div>
<div class="products">#controller.Products.getByCatergoyId(cat.id)</div>
}
Controller:
public static Result getByCatergoyId(Long catId) {
List<Product> products = Product.find.where().eq("category.id", catId).findList();
return ok(views.html.display.productTable.render(products));
}
If you want to get the code from the productTable view your method shouldn't return a Result but just a String containing rendered code.... aaaannnyyyyway , there is definitely much better way for rendering sub-templates in Play, check the Tags section of the documentation it does exactly what you want directly from the view, of course you will need to pass a product object to it.
Just create tags package in your view package and add there your sub-template (responsible for rendering only pat of page) it behaves exactly the same as common template.
What would I put in my MvxCommand to navigate to a simple URL? All mobile platforms have a mechanism to ask the OS for an Activity or ViewController that can display the contents of a URL. How would I do that with MvvmCross? One way that I know of is to put special stuff in the presentationBundle and/or parameterBundle when calling ShowViewModel that the presenter can detect to do the special OpenUrl command. But is that the best way??
There is a plugin which enables this - https://github.com/slodge/MvvmCross/tree/v3/Plugins/Cirrious/WebBrowser
If that plugins is loaded, then a viewmodel can use:
public class MyViewModel : MvxViewModel
{
private readonly IMvxWebBrowserTask _webBrowser;
public MyViewModel(IMvxWebBrowserTask webBrowser)
{
_webBrowser = webBrowse;
}
public ICommand ShowWebPage
{
get { return new MvxCommand(() => _webBrowser.ShowWebPage("https://github.com/slodge/mvvmcross");
}
}
You can see this used in, for example:
https://github.com/slodge/MvvmCross-Tutorials/blob/master/Sample%20-%20CirriousConference/Cirrious.Conference.Core/ViewModels/BaseViewModel.cs
https://github.com/slodge/MvvmCross-Tutorials/blob/master/Sample%20-%20CustomerManagement/CustomerManagement/CustomerManagement/ViewModels/DetailsCustomerViewModel.cs
If you ever need to create your own plugins, see https://speakerdeck.com/cirrious/plugins-in-mvvmcross
I want my page to load javascript dynamically to my body:
<script type= "text/javascript" src="this path should be decided from wicket dynamically"/>
I am using wicket version 1.4 therefore JavaScriptResourceReference does not exist in my version (for my inspection it wasn't ' )
how can I solve this ?
thanks in advance :).
I specify my comment into an answer.
You can use this code snippet:
WebMarkupContainer scriptContainer = new WebMarkupContainer("scriptContainer ");
scriptContainer .add(new AttributeAppender("type", Model.of("text/javascript")));
scriptContainer .add(
new AttributeAppender("src", urlFor(
new JavaScriptResourceReference(
YourClass.class, "JavaScriptFile.js"), null).toString()));
add(scriptContainer );
and the corresponding html:
<script wicket:id="scriptContainer "></script>
Just change the string JavaScriptFile.js to load any other Javascript file.
JavascriptPackageResource.getHeaderContributor() does exactly what you need.
You need nothing in your markup, just add the HeaderContributor it returns to your page.
Update: For Wicket 1.5 see the migration guide, but it goes like this:
public class MyPage extends WebPage {
public MyPage() {
}
public void renderHead(IHeaderResponse response) {
response.renderJavaScriptReference(new PackageResourceReference(YuiLib.class,
"yahoo-dom-event/yahoo-dom-event.js"));
response.renderCSSReference(new PackageResourceReference(AbstractCalendar.class,
"assets/skins/sam/calendar.css"));
}
}
If you want to put your <script> element in the body, you can simply declare it as a WebMarkupContainer and add an AttributeModifier to set the src attribute. Although in that case wicket won't generate the relative URLs for you, you have to do it yourself.
I'm not sure I understood completely.
If you are trying to create and append a script to the body after the page is loaded you should do it this way:
<script type="text/javascript">
function load_js() {
var element = document.createElement("script");
element.src = "scripts/YOUR_SCRIPT_SRC.js"; // <---- HERE <-----
document.body.appendChild(element);
}
// Wait for the page to be loaded
if(window.addEventListener)
window.addEventListener("load",load_js,false);
else if(window.attachEvent)
window.attachEvent("onload",load_js);
else
window.onload = load_js;
</script>
What I did here is create a new script element, and then apply to it its source.
That way you can control dynamicaly the src. After that I append it to the body.
The last part is there so the new element is applied only after the page is loaded.
public ActionResult Home()
{
return View();
}
This is what I have for my current site within the HomeController. How can I detect if the action is called from a mobile device, and if it is, re-direct to MobileHome.aspx instead of Home.aspx.
I don't need to know the details of the device, because I am implementing the view in JQuery Mobile, which should adjust itself correctly depending on the view it's rendered in.
You may find the following blog post useful.
The following is an override on the Controller class. I have not tested this, so consider it pseudo code:
protected override void OnActionExecuted(ActionExecutedContext filterContext)
{
if (this.Request.Browser.IsMobileDevice && filterContext.Result is ViewResultBase)
{
var viewResult = filterContext.Result as ViewResultBase;
viewResult.ViewName = "Mobile" + viewResult.ViewName;
}
base.OnActionExecuted(filterContext);
}
You can use the Request.Browser.IsMobileDevice to determine if the device is mobile (obviously), and then check to see if the result it a view. However, changing the view name is not sufficient if you pass an actual view to the result of your action.