public class JavascriptHelper {
    //method to call javascript
    public static final void callJavascriptMethod() {//【java调用javascript方法】
        final String jsCallStr = String.format("JavaHelper.javascriptMethod('%s')", "hello world, from javascript");
        Cocos2dxHelper.runOnGLThread(new Runnable() {
            @Override
            public void run() {
                Cocos2dxJavascriptJavaBridge.evalString(jsCallStr);
            }
        });
    }
    //call by javascript
    public static final String loadJavaMethod(final int no, final String description) {
        return "no="+no+",description="+description;
    }
}

var JavaHelper = JavaHelper||{};
JavaHelper.callClassName = "cn/winfirm/tools/JavascriptHelper";

JavaHelper.javascriptMethod=function(param) {
    cc.log(param); // "hello world, javascript"
}

JavaHelper.callToJava=function() {//【javascript调用java方法】
    var methodName = "loadJavaMethod";
    var signature = "(ILjava/lang/String;)Ljava/lang/String;";
    var param1=30;
    var param2="hello world, from javascript";

    var result = jsb.reflection.callStaticMethod(JavaHelper.callClassName, methodName, signature, param1, param2);
    cc.log(result);//"no=30,description=hello world, from javascript"
}