如何从java代码调用javascript函数

I'm trying to call a javascript function from a java class, but I get these errors:

我试图从java类调用一个javascript函数,但我得到这些错误:

-Could not find method sun.misc.Service.installedProviders, referenced from method javax.script.ScriptEngineManager.initEngines

-Could not find method sun.misc.Service.providers, referenced from method javax.script.ScriptEngineManager.initEngines

-Could not find method sun.misc.Service.installedProviders, referenced from method javax.script.ScriptEngineManager.initEngines

-java.lang.VerifyError: javax.script.ScriptEngineManager

Here the code:

这里的代码:

    public  void sendResult(){
    ScriptEngineManager manager = new ScriptEngineManager();
                    ScriptEngine engine = manager.getEngineByName("js");

                    String script = "function send() {"+"var id_result = window.MyPGP.getResult();"+                            
                            "document.getElementById('id_result').value = id_result;"+"console.log(\"change the box value\");";

                    try {
                        engine.eval(script);

                        Invocable invocableEngine = (Invocable) engine;

                        invocableEngine.invokeFunction("send");


   } catch (ScriptException e) {
                    e.printStackTrace();
                } catch (NoSuchMethodException e) {
                    e.printStackTrace();
                }  catch (Exception e) {
                    e.printStackTrace();
                }

What I'm trying exactly to do is that when the payment is finished, this function is called in other methods in this class to get the result of the payment and it is printed in a box in the main html.

我正在努力做的是,当付款完成时,在此类中的其他方法中调用此函数以获得付款结果,并将其打印在主html中的框中。

3 个解决方案

#1

 ScriptEngine engine = manager.getEngineByName("JavaScript");

Does this work?

这有用吗?

#2

You can do something like this

你可以做这样的事情

super.loadUrl("file:///android_asset/www/index.html", 20000);
super.loadUrl("javascript: { var pageFlag = '" + flag + "';}"); // Your Javascript function here

#3

use this code

使用此代码

import javax.script.*;

public class InvokeScriptFunction {
    public static void main(String[] args) throws Exception {
        ScriptEngineManager manager = new ScriptEngineManager();
        ScriptEngine engine = manager.getEngineByName("JavaScript");

        // JavaScript code in a String
        String script = "function hello(name) { print('Hello, ' + name); }";
        // evaluate script
        engine.eval(script);

        // javax.script.Invocable is an optional interface.
        // Check whether your script engine implements or not!
        // Note that the JavaScript engine implements Invocable interface.
        Invocable inv = (Invocable) engine;

        // invoke the global function named "hello"
        inv.invokeFunction("hello", "Scripting!!" );
    }
}

good luck

#1

 ScriptEngine engine = manager.getEngineByName("JavaScript");