keylistener.~cpp

java jni 模拟键盘事件 里面有一个dll是用c 写的

#include "jni.h"
#include "windows.h"
#include "SystemKey.h"
#include <iostream>
using namespace std;
JNIEnv* _env;
jclass _obj;
jmethodID _id;
HHOOK g_hook = NULL;


LRESULT CALLBACK KeyboardProc(int nCode, WPARAM wParam, LPARAM lParam){
	if(nCode>=0 && g_hook != NULL){
		(*_env).CallStaticVoidMethod(_obj,_id,wParam);
	}
	return CallNextHookEx(g_hook,nCode,wParam,lParam);
}

JNIEXPORT void JNICALL Java_SystemKey_Init(JNIEnv * env, jobject obj){
	_obj = (*env).GetObjectClass(obj);
	_id = (*env).GetStaticMethodID(_obj,"KeyAction","(I)V");
	_env = env;
	g_hook = SetWindowsHookEx(WH_KEYBOARD,KeyboardProc,GetModuleHandle("KeyListenerDLL"),0);
}
JNIEXPORT void JNICALL Java_SystemKey_UnHook(JNIEnv * env, jobject obj){
	UnhookWindowsHookEx(g_hook);
}