On iOS this works fine, but on Android when the "void OnReceiveValue(Java.Lang.Object result)" is called, the result is always a 'null' 4 character value?? This site uses cookies for analytics, personalized content and ads. How to get a java script function return value in C++? After a long time of not using JavaScript, I implemented a route planner with the google maps API V3. I defined some functions to access the scripting part of it via Qt's WebKit function: evaluateJavaScript(). Now the hard part is, to get the position data of the markers (see picture ... func stringByEvaluatingJavaScript (from script: String) -> String? ... Return Value. The result of running the JavaScript script passed in the script parameter, ... A task that represents the asynchronous EvaluateJavaScript operation. The value of the TResult parameter is a WKJavascriptEvaluationResult. To play with, you could try after your evaluateJavaScript() putting in some kind of "Qt Sleep" at the server side (i.e. in your Qt code, not via JavaScript's window.setImeout()), which must allow time for the WebView to complete its client-side's onload) and then issue a new evaluateJavaScript() which does the calculation and returns the value to you. Dec 05, 2017 · I have a straightforward JS function that returns a value. It's all working in the WKWebView. However, Result just returns Null in the JSComplete event. How can I get the return value from my JS function to the Result parameter in that function? Jun 17, 2019 · User's have expressed interest in making it easier to get a response from a postMessage, the propose solution would be to have the postMessage return a javascript promise and have some convenient wrapper code on the Dart side that takes and return value and calls evaluateJavascript to complete the returned promise. Dec 02, 2014 · You can set a variable to a function like this: [code] function myFunc(){ var foo= 500; return foo; } var a = myFunc(); console.log(a); //500 [/code] foo is declared inside the function so it cannot be accessed outside of the function. How do you return multiple values in Python? How do I center text horizontally and vertically in a TextView? How to return multiple objects from a Java method? Why is the Android emulator so slow? How can we speed up the Android emulator? how to read value from string.xml in android? On iOS this works fine, but on Android when the "void OnReceiveValue(Java.Lang.Object result)" is called, the result is always a 'null' 4 character value?? This site uses cookies for analytics, personalized content and ads. Mar 06, 2017 · But what about return values? For as you know, WKWebView runs in its own process and that’s why pushMessage() function cannot return any value. It is not possible to get the return value from native function synchronously. It is also not possible to give a JS callback function to native function. Call JavaScript inside WebView from Android activity, with parameter passed. The last exercise " Run Android Java code from Webpage " show how to call from WebView JavaScript to Android activity. Here will show how to call in reverse direction: Call JavaScript inside WebView from Android activity, with parameter passed. Jun 17, 2019 · User's have expressed interest in making it easier to get a response from a postMessage, the propose solution would be to have the postMessage return a javascript promise and have some convenient wrapper code on the Dart side that takes and return value and calls evaluateJavascript to complete the returned promise. Dec 05, 2017 · I have a straightforward JS function that returns a value. It's all working in the WKWebView. However, Result just returns Null in the JSComplete event. How can I get the return value from my JS function to the Result parameter in that function? North american hockey league teamsThe problem with this is that you can’t directly return a value. Instead the last assignment ends up as your return value. This is similar to the behavior you see in event handlers like onclick in Web pages where you sometimes get unexpected results if you don’t explicitly return a value. Jun 17, 2019 · User's have expressed interest in making it easier to get a response from a postMessage, the propose solution would be to have the postMessage return a javascript promise and have some convenient wrapper code on the Dart side that takes and return value and calls evaluateJavascript to complete the returned promise. PhantomJS - evaluateJavascript() - The evaluateJavaScript method helps to execute the function passed to it as a string. Please note the string passed has to be a function only. The problem with this is that you can’t directly return a value. Instead the last assignment ends up as your return value. This is similar to the behavior you see in event handlers like onclick in Web pages where you sometimes get unexpected results if you don’t explicitly return a value. The problem with this is that you can’t directly return a value. Instead the last assignment ends up as your return value. This is similar to the behavior you see in event handlers like onclick in Web pages where you sometimes get unexpected results if you don’t explicitly return a value. To play with, you could try after your evaluateJavaScript() putting in some kind of "Qt Sleep" at the server side (i.e. in your Qt code, not via JavaScript's window.setImeout()), which must allow time for the WebView to complete its client-side's onload) and then issue a new evaluateJavaScript() which does the calculation and returns the value to you. Jul 23, 2012 · Communication between Application and WebView with JavaScript Updated Jul 23, 2012 in Android JavaScript. When you’re developing an Android application you sometimes need to use a WebView to show html base content to the user. The WebView might contain a help text, some other static text, or in some cases, you may need to show dynamic content. Using evaluateJavaScript() you can run any JavaScript in a WKWebView and read the result in Swift. This can be any JavaScript you want, which effectively means you can dig right into a page and pull out any kind of information you want. Here's an example to get you started: PhantomJS - evaluateJavascript() - The evaluateJavaScript method helps to execute the function passed to it as a string. Please note the string passed has to be a function only. Nov 25, 2010 · It would be fantastic if there was an alternative to CefFrame's ExecuteJavaScript (perhaps called EvaluateJavaScript) which would return the result as a string. To play with, you could try after your evaluateJavaScript() putting in some kind of "Qt Sleep" at the server side (i.e. in your Qt code, not via JavaScript's window.setImeout()), which must allow time for the WebView to complete its client-side's onload) and then issue a new evaluateJavaScript() which does the calculation and returns the value to you. Jun 13, 2014 · Swift, WKWebView, and Calling from Swift to Javascript. Posted in Uncategorized tagged calling java, hybrid, iOS, JavaScript, Swift at 7:34 pm by tetontech. Update: If you are interested in this topic you may find this new post helpful. It describes and updated version of the example code you see here and standardizes it for both Swift and Android. May 12, 2016 · How to get javascript value in Android ... Because it looks like the runtime knows nothing about method evaluateJavascript(). ... I want to get this return value as a ... Similar to AddJavaScript, the payload of EvaluateJavaScript also contains a resultCode to indicate whether the evaluating was successful or not. If everything goes fine, you could find the return value of the JavaScript in payload.data. Jun 17, 2016 · Website : http://www.edmtdev.com By default, Navigation Back Feature is disabled in android WebView. You can enable it by Overriding onKeyDown method, so in ... func stringByEvaluatingJavaScript (from script: String) -> String? ... Return Value. The result of running the JavaScript script passed in the script parameter, ... How do you return multiple values in Python? How do I center text horizontally and vertically in a TextView? How to return multiple objects from a Java method? Why is the Android emulator so slow? How can we speed up the Android emulator? how to read value from string.xml in android? Jun 17, 2016 · Website : http://www.edmtdev.com By default, Navigation Back Feature is disabled in android WebView. You can enable it by Overriding onKeyDown method, so in ... Return Values. This method has the following return values. status [Boolean] true - if the browser cache is not empty. false - if the browser cache is empty. JavaScript Example //Defining the properties for a Browser widget with requestURLConfig:requestUrlConf. Picciottu e camurristaevaluateJavaScript evaluates the function defined in the string in the context of the web page. It is similar to evaluate. Examples Set a variable and log it from the web page. This example passes a constant value from phantomjs to the window object in the context of the web page, and then logs that value. The problem with this is that you can’t directly return a value. Instead the last assignment ends up as your return value. This is similar to the behavior you see in event handlers like onclick in Web pages where you sometimes get unexpected results if you don’t explicitly return a value. this.evaluateJavaScript(str) return null #12774. Closed luoweime opened this issue Nov 26, 2014 · 1 comment Closed this.evaluateJavaScript(str) return null #12774. Aug 19, 2014 · Hi do you know a good way to turn the event driven programming into non-event driven. Lets say you want to define a function like the following example: protected String getDate() { mJsEvaluator.ev... How many bond hearings can you have