cocos2dx提供三方的iconv来转化字符问题，交叉编译到android的时候，需要引入iconv的module，下载iconv,解压到cocos2d根目录 ，编写mk：

LOCAL_PATH := $(call my-dir)

include $(CLEAR_VARS)

LOCAL_ARM_MODE := arm
ifeq ($(BUILD_WITH_NEON),1)
LOCAL_ARM_NEON := true
endif

LOCAL_MODULE := iconv

LOCAL_CFLAGS +=     -DHAVE_CONFIG_H     -DBUILDING_LIBICONV     -DIN_LIBRARY     
 #  -DLIBICONV_PLUG

LOCAL_C_INCLUDES +=     $(LOCAL_PATH)/include 	$(LOCAL_PATH)/libcharset 	$(LOCAL_PATH)/lib     $(LOCAL_PATH)/libcharset/include 	$(LOCAL_PATH)/srclib

LOCAL_SRC_FILES :=     lib/iconv.c 	libcharset/lib/localcharset.c 	lib/relocatable.c

LOCAL_STATIC_LIBRARIES += charset

include $(BUILD_STATIC_LIBRARY)

include $(CLEAR_VARS)

include $(call all-makefiles-under,$(LOCAL_PATH))

引入module，贴上我的mk

LOCAL_PATH := $(call my-dir)

include $(CLEAR_VARS)

LOCAL_MODULE := cocos2dcpp_shared

LOCAL_MODULE_FILENAME := libcocos2dcpp


FILE_LIST := hellocpp/main.cpp FILE_LIST += $(wildcard $(LOCAL_PATH)/../../Classes/*.cpp) 
LOCAL_SRC_FILES := $(FILE_LIST:$(LOCAL_PATH)/%=%) 
 
LOCAL_C_INCLUDES := $(LOCAL_PATH)/../../Classes 

LOCAL_WHOLE_STATIC_LIBRARIES := cocos2dx_static
LOCAL_WHOLE_STATIC_LIBRARIES += cocosdenshion_static
#add iconv from thrid part
LOCAL_WHOLE_STATIC_LIBRARIES += iconv

# LOCAL_WHOLE_STATIC_LIBRARIES += box2d_static
# LOCAL_WHOLE_STATIC_LIBRARIES += cocosbuilder_static
# LOCAL_WHOLE_STATIC_LIBRARIES += spine_static
# LOCAL_WHOLE_STATIC_LIBRARIES += cocostudio_static
# LOCAL_WHOLE_STATIC_LIBRARIES += cocos_network_static
# LOCAL_WHOLE_STATIC_LIBRARIES += cocos_extension_static


include $(BUILD_SHARED_LIBRARY)

$(call import-module,.)
$(call import-module,audio/android)
$(call import-module,iconv)

# $(call import-module,Box2D)
# $(call import-module,editor-support/cocosbuilder)
# $(call import-module,editor-support/spine)
# $(call import-module,editor-support/cocostudio)
# $(call import-module,network)
# $(call import-module,extensions)

编译成功运行  

附上两个iconv的基本用法

//icove
int Kit::code_convert( const char *from_charset, const char *to_charset, const char *inbuf, size_t inlen, char *outbuf, size_t outlen )
{
	iconv_t cd;
	const char *temp = inbuf;
	const char **pin = &temp;
	char **pout = &outbuf;
	memset( outbuf, 0, outlen );
	cd = iconv_open( to_charset, from_charset );
	if(cd == 0) return -1;
	if(iconv( cd, pin, &inlen, pout, &outlen ) == -1) return -1;
	iconv_close( cd );
	return 0;
}
/*UTF8 To GB2312*/
string  Kit:: utf2gb( const char *inbuf )
{
	size_t inlen = strlen( inbuf );
	char * outbuf = new char[inlen * 2 + 2];
	string strRet;
	if(code_convert( "utf-8", "gb2312", inbuf, inlen, outbuf, inlen * 2 + 2 ) == 0)
	{
		strRet = outbuf;
	}
	delete[] outbuf;
	return strRet;
}

string  Kit:: gb2utf8( const char *inbuf )
{
	size_t inlen = strlen( inbuf );
	char * outbuf = new char[inlen * 2 + 2];
	string strRet;
	if(code_convert( "gb2312", "utf-8", inbuf, inlen, outbuf, inlen * 2 + 2 ) == 0)
	{
		strRet = outbuf;
	}
	delete[] outbuf;
	outbuf = NULL;
	return strRet;
}