Easy to call C++ or Native(Android/IOS) method in Cocos2dx-JSB by javascript.

This project is base on EasyNDK for cocos2d-x.

If you have familar with EasyNDK, you will understand EasyJSB as well.

Evironment

This project is developed on cocos2d-x v.2.2.2, if you want to open Xcode example, download cocos2d-x v2.2.2 and put EasyJSB project under cocos2dx(your main cocos2dx folder)\projects\ is recommanded.

• Use EasyJSB on IOS

  • Copy 5 folders and 2 files as below that under Classes into your project\Classes folder.

    • [Folder]IOSJSBHelper
    • [Folder]JSBHelper
    • [Folder]IOSNDKHelper
    • [Folder]NDKHelper
    • [Folder]jansson
    • [File]Bridge.cpp
    • [File]Bridge.h

  • Drag 5 folders as above to your Xcode project, 2 files to Classes group.

  • Call objective-c function from javascript side. example:

  var map = {};
  map["message"]="I am message from javascript."
  SendMessageToNative("helloNative",map);
  

  • Set NDK Receiver on objective-c side.

  ```
  - (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil {
      if ((self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil])) {
    
          NSLog(@"into function: %s",__FUNCTION__);
          // tell NDKHelper that RootViewController will get message from Cpp.
          [IOSNDKHelper SetNDKReciever:self];
       }
       return self;
    }
    
    - (void) helloNative:(NSObject *)prms{
    
          //if you want to send callback backward to javascript when complete the work, 
          //you can invoke method as below:
          NSDictionary *dictionary = [NSDictionary dictionaryWithObjectsAndKeys:[NSString stringWithFormat:@"hello, i am message from native ios"],@"message", nil];
        
          [IOSJSBHelper SendMessageToJS:@"helloJS" WithParameters:dictionary];
     }
  ```
  

Now you can comunicate easily between javascript and objective-c (ios).

• Use EasyJSB on Android

  For using EasyJSB on Android, you have to declare some code in Android project.

  • Write NDK make rule to jni\Android.mk, the example is on below:

    LOCAL_PATH := $(call my-dir)
    include $(CLEAR_VARS)
    LOCAL_MODULE := cocos2djs_shared
    LOCAL_MODULE_FILENAME := libcocos2djs
    LOCAL_SRC_FILES := hellojavascript/main.cpp \
                 ../../Classes/AppDelegate.cpp \
                 ../../Classes/Bridge.cpp \
                 ../../Classes/jansson/dump.c \
                 ../../Classes/jansson/error.c \
                 ../../Classes/jansson/hashtable.c \
                 ../../Classes/jansson/load.c \
                 ../../Classes/jansson/memory.c \
                 ../../Classes/jansson/pack_unpack.c \
                 ../../Classes/jansson/strbuffer.c \
                 ../../Classes/jansson/strconv.c \
                 ../../Classes/jansson/utf.c \
                 ../../Classes/jansson/value.c \
                 ../../Classes/NDKHelper/NDKCallbackNode.cpp \
                 ../../Classes/NDKHelper/NDKHelper.cpp \
                 ../../Classes/JSBHelper/js_bindings_easyJSB.cpp \
                 ../../Classes/JSBHelper/JSBHelper.cpp \
                 ../../Classes/JSBHelper/JSBHelperCallbackNode.cpp
                 
       LOCAL_C_INCLUDES := $(LOCAL_PATH)/../../Classes \
                  $(LOCAL_PATH)/../../Classes/NDKHelper \
                  $(LOCAL_PATH)/../../Classes/jansson \
                  $(LOCAL_PATH)/../../Classes/JSBHelper
                  
       LOCAL_WHOLE_STATIC_LIBRARIES := cocos2dx_static
       LOCAL_WHOLE_STATIC_LIBRARIES += cocosdenshion_static
       LOCAL_WHOLE_STATIC_LIBRARIES += chipmunk_static
       LOCAL_WHOLE_STATIC_LIBRARIES += spidermonkey_static
       LOCAL_WHOLE_STATIC_LIBRARIES += scriptingcore-spidermonkey
       
       LOCAL_EXPORT_CFLAGS := -DCOCOS2D_DEBUG=2 -DCOCOS2D_JAVASCRIPT
       
       include $(BUILD_SHARED_LIBRARY)
       
       $(call import-module,cocos2dx)
       $(call import-module,CocosDenshion/android)
       $(call import-module,external/chipmunk)
       $(call import-module,scripting/javascript/spidermonkey-android)
       $(call import-module,scripting/javascript/bindings)
    

  • Copy AndroidJSBHelper.java to package com.easyjsb.classes(you have to create it).

  • Call java method from javascript side

    example:

    var map = {};
    map["message"]="I am message from javascript."
    SendMessageToNative("helloNative",map);
    

  • Set NDK Receiver on Android side.

    protected void onCreate(Bundle savedInstanceState){
      super.onCreate(savedInstanceState);
      AndroidNDKHelper.SetNDKReciever(this);
    }
     
    public void helloNative(JSONObject prms){
      Log.i(TAG, TAG+" this is method: helloNative in native Android, prms: "+prms.toString());
     
      //if you want to send callback backward to javascript when complete the work, 
      //you can invoke method as below:
      JSONObject obj = new JSONObject();
      try {
           obj.put("message","I am message from native Android");
         } catch (JSONException e) {
           e.printStackTrace();
       }
       AndroidJSBHelper.SendMessageToJS(this, "helloJS", obj);
    }
    
    static {
        System.loadLibrary("cocos2djs");
    }
    

Now you can comunicate easily between javascript and Java (Android).

• Blogger: Open EasyJSB Sample quickly