Call android Toast methon in cocos2dx by using JNI function (C++)

Call Android Toast Function in Cocos2dx by Using JNI Function

Propose : How to call jni function in cocos2dx develop enviroment.

I recommend that create Service class first,

Once you have service class, will reduce develop time for another app what you want to call method. just copy and paste service class file and re-use it.

Here is example to call Toast function in Cocos2dx. To do that create DeviceService class first.

[ Header File ]

#include "cocos2d.h"

USING_NS_CC;

using namespace std;

class DeviceServices

{

public:

DeviceServices();

~DeviceServices();

public:

static void showToastMessage(const std::string &iMsg);

}

[ Source File ]

#pragma execution_character_set("utf-8")

#include "DeviceServices.h"

DeviceServices::DeviceServices(){}

DeviceServices::~DeviceServices(){}

#if (CC_TARGET_PLATFORM == CC_PLATFORM_ANDROID)

#include "platform/android/jni/JniHelper.h"

#include <jni.h>

const char* AppActivityClassName = "com/eyen/cpp/AppActivity";

void DeviceServices::showToastMessage(const std::string &iMsg)

{

cocos2d::JniMethodInfo t;

if (cocos2d::JniHelper::getStaticMethodInfo(t, AppActivityClassName, "jniShowToastMessage", "(Ljava/lang/String;)V"))

{

jstring word = t.env->NewStringUTF(iMsg.c_str());

t.env->CallStaticVoidMethod(t.classID, t.methodID, word);

t.env->DeleteLocalRef(t.classID);

}

}

#else

Simply done for C++ part.

To use it, just call "DeviceServices::showToastMessage("Hello") method where you want to call.

#include "DeviceServices.h"

void MainScene::welcome()

{

DeviceServices::showToastMessage("반가워요");

}

Really easy right?

Next step is that implement Java (android) part of code.

Just copy and paste below example code. 

public class AppActivity extends Cocos2dxActivity {

// main

private static AppActivity _appActiviy;

// toast message

String mToastMessage;

@Override

protected void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

_appActiviy = this;

}

  // show toast message

public void showToastMessage() {

Toast.makeText(getContext(), mToastMessage, Toast.LENGTH_SHORT).show();

}

  // Jni call from Cocos2dx

public static void jniShowToastMessage(final String iWord) {

_appActiviy.mToastMessage = iWord;

_appActiviy.runOnUiThread(new Runnable(){

@Override

public void run() {

_appActiviy.showToastMessage();

}

});

}

}

Same way to call other function as like vibration, send email, send SMS and so on.

Good luck.! and Enjoy develop.