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How to call javascript function from java code
-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

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();
                }

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

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