diff --git a/03_day.pptx b/03_day.pptx
index 2ab9872..adc9d51 100644
Binary files a/03_day.pptx and b/03_day.pptx differ
diff --git a/03_day/binder_5/Android.bp b/03_day/binder_5/Android.bp
new file mode 100644
index 0000000..6ea477f
--- /dev/null
+++ b/03_day/binder_5/Android.bp
@@ -0,0 +1,18 @@
+cc_binary {
+    name: "my_server_cpp_3",
+    shared_libs: ["liblog", "libutils", "libbinder"],
+    srcs: [
+        "my_server.cpp",
+        "ILedService.cpp",
+        "LedService.cpp",
+    ],
+}
+
+cc_binary {
+    name: "my_client_cpp_3",
+    shared_libs: ["liblog", "libutils", "libbinder"],
+    srcs: [
+        "my_client.cpp",
+        "ILedService.cpp",
+    ],
+}
diff --git a/03_day/binder_5/ILedService.cpp b/03_day/binder_5/ILedService.cpp
new file mode 100644
index 0000000..d8c6244
--- /dev/null
+++ b/03_day/binder_5/ILedService.cpp
@@ -0,0 +1,46 @@
+#define LOG_TAG "LedService"
+
+#include "ILedService.h"
+
+#include <binder/IPCThreadState.h>
+#include <binder/Parcel.h>
+#include <unistd.h>
+
+namespace android {
+
+// ----------------------------------------------------------------------
+
+class BpLedService : public BpInterface<ILedService>
+{
+public:
+    explicit BpLedService(const sp<IBinder>& impl)
+        : BpInterface<ILedService>(impl)
+    {
+    }
+
+    virtual void ledOn(void)
+    {
+		printf("BpLedService::ledOn()\n");
+        Parcel data, reply;
+        remote()->transact(LED_ON, data, &reply);
+    }
+};
+
+IMPLEMENT_META_INTERFACE(LedService, "android.os.ILedService");
+
+// ----------------------------------------------------------------------
+
+status_t BnLedService::onTransact(
+    uint32_t code, const Parcel& data, Parcel* reply, uint32_t flags)
+{
+	switch (code) {
+		case LED_ON: {
+						 ledOn();
+						 return NO_ERROR;
+					 } break;
+		default:
+					 return BBinder::onTransact(code, data, reply, flags);
+	}
+}
+// ----------------------------------------------------------------------
+}; // namespace android
diff --git a/03_day/binder_5/ILedService.h b/03_day/binder_5/ILedService.h
new file mode 100644
index 0000000..1def502
--- /dev/null
+++ b/03_day/binder_5/ILedService.h
@@ -0,0 +1,41 @@
+#ifndef ANDROID_ILED_SERVICE_H
+#define ANDROID_ILED_SERVICE_H
+
+#include <binder/IInterface.h>
+#include <utils/String16.h>
+
+namespace android {
+
+// ----------------------------------------------------------------------
+
+class ILedService : public IInterface
+{
+public:
+    DECLARE_META_INTERFACE(LedService)
+
+    virtual void   ledOn() = 0;
+
+    enum {
+        LED_ON = IBinder::FIRST_CALL_TRANSACTION
+    };
+};
+
+// ----------------------------------------------------------------------
+
+class BnLedService : public BnInterface<ILedService>
+{
+public:
+    virtual status_t    onTransact( uint32_t code,
+                                    const Parcel& data,
+                                    Parcel* reply,
+                                    uint32_t flags = 0);
+};
+
+// ----------------------------------------------------------------------------
+}; // namespace android
+
+#endif // ANDROID_ISERVICE_MANAGER_H
+
+
+
+
diff --git a/03_day/binder_5/LedService.cpp b/03_day/binder_5/LedService.cpp
new file mode 100644
index 0000000..a62c39f
--- /dev/null
+++ b/03_day/binder_5/LedService.cpp
@@ -0,0 +1,10 @@
+#include "LedService.h"
+#include <stdio.h> 
+
+namespace android 
+{
+	void LedService::ledOn(void)
+	{
+		printf("LedService::ledOn()\n");
+	}
+};
diff --git a/03_day/binder_5/LedService.h b/03_day/binder_5/LedService.h
new file mode 100644
index 0000000..27508ba
--- /dev/null
+++ b/03_day/binder_5/LedService.h
@@ -0,0 +1,13 @@
+#ifndef ANDROID_LED_SERVICE_H
+#define ANDROID_LED_SERVICE_H
+#include "ILedService.h"
+
+namespace android {
+	class LedService : public BnLedService
+	{
+		public : 
+			void ledOn(void);
+	};
+};
+
+#endif
diff --git a/03_day/binder_5/ProcessState.cpp b/03_day/binder_5/ProcessState.cpp
new file mode 100644
index 0000000..07b6867
--- /dev/null
+++ b/03_day/binder_5/ProcessState.cpp
@@ -0,0 +1,54 @@
+#if 1
+#include <stdio.h>
+class ProcessState
+{
+	static ProcessState *gProcess;
+	ProcessState()
+	{
+		printf("fd=open(\"/dev/binder\", O_RDWR)\n");
+	}
+	public:
+	static ProcessState *self()
+	{
+		if( gProcess == 0 )
+			gProcess = new ProcessState;
+		return gProcess;
+	}
+	~ProcessState()
+	{
+		printf("close(fd)\n");
+	}
+};
+ProcessState *ProcessState::gProcess = 0;
+
+int main()
+{
+	ProcessState *p1 = ProcessState::self();
+	ProcessState *p2 = ProcessState::self();
+	//ProcessState process; 
+	return 0;
+}
+#endif
+
+#if 0
+#include <stdio.h>
+class ProcessState
+{
+	public:
+		ProcessState()
+		{
+			printf("fd=open(\"/dev/binder\", O_RDWR)\n");
+		}
+		~ProcessState()
+		{
+			printf("close(fd)\n");
+		}
+};
+
+int main()
+{
+	ProcessState p1;
+	ProcessState p2;
+	return 0;
+}
+#endif
diff --git a/03_day/binder_5/my_client.cpp b/03_day/binder_5/my_client.cpp
new file mode 100644
index 0000000..c651d64
--- /dev/null
+++ b/03_day/binder_5/my_client.cpp
@@ -0,0 +1,23 @@
+
+#include <binder/ProcessState.h>
+#include <binder/IServiceManager.h>
+#include <binder/Binder.h>
+#include <binder/IPCThreadState.h>
+#include <utils/String16.h>
+#include "ILedService.h"
+
+using namespace android;
+
+int main()
+{
+	sp<ProcessState> proc(ProcessState::self());
+	sp<IServiceManager> sm(defaultServiceManager());
+	sp<IBinder> binder = sm->getService( String16("led.service") );
+	sp<ILedService> led = interface_cast<ILedService>( binder );
+	led->ledOn();
+
+	return 0;
+}
+
+
+
diff --git a/03_day/binder_5/my_server.cpp b/03_day/binder_5/my_server.cpp
new file mode 100644
index 0000000..18816ac
--- /dev/null
+++ b/03_day/binder_5/my_server.cpp
@@ -0,0 +1,22 @@
+
+#include <binder/ProcessState.h>
+#include <binder/IServiceManager.h>
+#include <binder/Binder.h>
+#include <binder/IPCThreadState.h>
+#include <utils/String16.h>
+#include "LedService.h"
+
+using namespace android;
+
+int main()
+{
+	sp<ProcessState> proc(ProcessState::self());
+	sp<IServiceManager> sm(defaultServiceManager());
+	sm->addService( String16("led.service"), new LedService );
+	IPCThreadState::self()->joinThreadPool();
+
+	return 0;
+}
+
+
+
diff --git a/03_day/binder_6/Android.bp b/03_day/binder_6/Android.bp
new file mode 100644
index 0000000..6ea477f
--- /dev/null
+++ b/03_day/binder_6/Android.bp
@@ -0,0 +1,18 @@
+cc_binary {
+    name: "my_server_cpp_3",
+    shared_libs: ["liblog", "libutils", "libbinder"],
+    srcs: [
+        "my_server.cpp",
+        "ILedService.cpp",
+        "LedService.cpp",
+    ],
+}
+
+cc_binary {
+    name: "my_client_cpp_3",
+    shared_libs: ["liblog", "libutils", "libbinder"],
+    srcs: [
+        "my_client.cpp",
+        "ILedService.cpp",
+    ],
+}
diff --git a/03_day/binder_6/ILedService.cpp b/03_day/binder_6/ILedService.cpp
new file mode 100644
index 0000000..a9529ad
--- /dev/null
+++ b/03_day/binder_6/ILedService.cpp
@@ -0,0 +1,49 @@
+#define LOG_TAG "LedService"
+
+#include "ILedService.h"
+
+#include <binder/IPCThreadState.h>
+#include <binder/Parcel.h>
+#include <unistd.h>
+
+namespace android {
+
+// ----------------------------------------------------------------------
+
+class BpLedService : public BpInterface<ILedService>
+{
+public:
+    explicit BpLedService(const sp<IBinder>& impl)
+        : BpInterface<ILedService>(impl)
+    {
+    }
+
+    virtual void connect(sp<ILedClient>& client)
+    {
+		printf("BpLedService::ledOn()\n");
+        Parcel data, reply;
+		data.writeStrongBinder(ILedClient::asBinder(client));
+        remote()->transact(CONNECT, data, &reply);
+    }
+};
+
+IMPLEMENT_META_INTERFACE(LedService, "android.os.ILedService");
+
+// ----------------------------------------------------------------------
+
+status_t BnLedService::onTransact(
+    uint32_t code, const Parcel& data, Parcel* reply, uint32_t flags)
+{
+	switch (code) {
+		case CONNECT: {
+						 sp<ICameraClient> client; 
+						 data.readStrongBinder(&client);
+						 connect(client);
+						 return NO_ERROR;
+					 } break;
+		default:
+					 return BBinder::onTransact(code, data, reply, flags);
+	}
+}
+// ----------------------------------------------------------------------
+}; // namespace android
diff --git a/03_day/binder_6/ILedService.h b/03_day/binder_6/ILedService.h
new file mode 100644
index 0000000..9a67220
--- /dev/null
+++ b/03_day/binder_6/ILedService.h
@@ -0,0 +1,42 @@
+#ifndef ANDROID_ILED_SERVICE_H
+#define ANDROID_ILED_SERVICE_H
+
+#include <binder/IInterface.h>
+#include <utils/String16.h>
+#include "ILedClient.h"
+
+namespace android {
+
+// ----------------------------------------------------------------------
+
+class ILedService : public IInterface
+{
+public:
+    DECLARE_META_INTERFACE(LedService)
+
+    virtual void   connect(sp<ILedClient>& client) = 0;
+
+    enum {
+        CONNECT = IBinder::FIRST_CALL_TRANSACTION
+    };
+};
+
+// ----------------------------------------------------------------------
+
+class BnLedService : public BnInterface<ILedService>
+{
+public:
+    virtual status_t    onTransact( uint32_t code,
+                                    const Parcel& data,
+                                    Parcel* reply,
+                                    uint32_t flags = 0);
+};
+
+// ----------------------------------------------------------------------------
+}; // namespace android
+
+#endif // ANDROID_ISERVICE_MANAGER_H
+
+
+
+
diff --git a/03_day/binder_6/LedService.cpp b/03_day/binder_6/LedService.cpp
new file mode 100644
index 0000000..55b4ca0
--- /dev/null
+++ b/03_day/binder_6/LedService.cpp
@@ -0,0 +1,11 @@
+#include "LedService.h"
+#include <stdio.h> 
+
+namespace android 
+{
+	void LedService::connect(sp<ILedClient>& client)
+	{
+		printf("LedService::ledOn()\n");
+		client->dataCallback(222);
+	}
+};
diff --git a/03_day/binder_6/LedService.h b/03_day/binder_6/LedService.h
new file mode 100644
index 0000000..1bb5d4a
--- /dev/null
+++ b/03_day/binder_6/LedService.h
@@ -0,0 +1,13 @@
+#ifndef ANDROID_LED_SERVICE_H
+#define ANDROID_LED_SERVICE_H
+#include "ILedService.h"
+
+namespace android {
+	class LedService : public BnLedService
+	{
+		public : 
+    		void connect(sp<ILedClient>& client);
+	};
+};
+
+#endif
diff --git a/03_day/binder_6/ProcessState.cpp b/03_day/binder_6/ProcessState.cpp
new file mode 100644
index 0000000..07b6867
--- /dev/null
+++ b/03_day/binder_6/ProcessState.cpp
@@ -0,0 +1,54 @@
+#if 1
+#include <stdio.h>
+class ProcessState
+{
+	static ProcessState *gProcess;
+	ProcessState()
+	{
+		printf("fd=open(\"/dev/binder\", O_RDWR)\n");
+	}
+	public:
+	static ProcessState *self()
+	{
+		if( gProcess == 0 )
+			gProcess = new ProcessState;
+		return gProcess;
+	}
+	~ProcessState()
+	{
+		printf("close(fd)\n");
+	}
+};
+ProcessState *ProcessState::gProcess = 0;
+
+int main()
+{
+	ProcessState *p1 = ProcessState::self();
+	ProcessState *p2 = ProcessState::self();
+	//ProcessState process; 
+	return 0;
+}
+#endif
+
+#if 0
+#include <stdio.h>
+class ProcessState
+{
+	public:
+		ProcessState()
+		{
+			printf("fd=open(\"/dev/binder\", O_RDWR)\n");
+		}
+		~ProcessState()
+		{
+			printf("close(fd)\n");
+		}
+};
+
+int main()
+{
+	ProcessState p1;
+	ProcessState p2;
+	return 0;
+}
+#endif
diff --git a/03_day/binder_6/my_client.cpp b/03_day/binder_6/my_client.cpp
new file mode 100644
index 0000000..e7bb9d1
--- /dev/null
+++ b/03_day/binder_6/my_client.cpp
@@ -0,0 +1,25 @@
+
+#include <binder/ProcessState.h>
+#include <binder/IServiceManager.h>
+#include <binder/Binder.h>
+#include <binder/IPCThreadState.h>
+#include <utils/String16.h>
+#include "ILedService.h"
+
+using namespace android;
+
+int main()
+{
+	sp<ProcessState> proc(ProcessState::self());
+	sp<IServiceManager> sm(defaultServiceManager());
+	sp<IBinder> binder = sm->getService( String16("led.service") );
+	sp<ILedService> led = interface_cast<ILedService>( binder );
+	led->connect( new Led );
+	IPCThreadState::self()->joinThreadPool();
+	
+
+	return 0;
+}
+
+
+
diff --git a/03_day/binder_6/my_server.cpp b/03_day/binder_6/my_server.cpp
new file mode 100644
index 0000000..18816ac
--- /dev/null
+++ b/03_day/binder_6/my_server.cpp
@@ -0,0 +1,22 @@
+
+#include <binder/ProcessState.h>
+#include <binder/IServiceManager.h>
+#include <binder/Binder.h>
+#include <binder/IPCThreadState.h>
+#include <utils/String16.h>
+#include "LedService.h"
+
+using namespace android;
+
+int main()
+{
+	sp<ProcessState> proc(ProcessState::self());
+	sp<IServiceManager> sm(defaultServiceManager());
+	sm->addService( String16("led.service"), new LedService );
+	IPCThreadState::self()->joinThreadPool();
+
+	return 0;
+}
+
+
+