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我正在尝试从 java 类调用 javascript 函数，但出现以下错误：

-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

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();
                }

我真正想做的是，当支付完成时，这个函数在这个类的其他方法中被调用来得到支付的结果，并打印在主html的一个框中。

4

3 回答 3

1

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!!" );
    }
}

祝你好运

于 2017-02-16T03:14:10.130 回答
0

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
于 2012-08-01T06:28:36.427 回答
0 
 ScriptEngine engine = manager.getEngineByName("JavaScript");

这行得通吗？

于 2012-07-31T11:56:33.547 回答