고귀양이의 노트.

param=$1

echo "숫자 입력 : "
read input

ret=`expr $input + $param`

echo "결과 : "$ret

exit 0

package nfc_simple;

import javax.smartcardio.*;

import java.nio.ByteBuffer;
import java.util.*;

public class NFCMain {
    private static final String UNKNOWN_CMD_SW = "0000";
    private static final String SELECT_OK_SW = "9000";
    
    public void run() {
        CardTerminal terminal;
        CardChannel channel;
        
        while (true) {
            // 터미널 초기화
            try {
                terminal = InitializeTerminal();
                
                if(IsCardPresent(terminal)) {                                   // 리더기 위에 카드(핸드폰)가 있을 경우
                    channel = GetCardAndOpenChannel(terminal);
                    
                    String response = selectCardAID(channel);
                    
                    System.out.println(response);
                }
                
                Thread.sleep(2000);
                
            } catch (CardException e) {
                e.printStackTrace();
            } catch (InterruptedException e) {
                e.printStackTrace();
            }
        }
    }
    
    public CardTerminal InitializeTerminal() throws CardException { 
        // Get terminal 
        System.out.println("Searching for terminals..."); 
        CardTerminal terminal = null; 
        TerminalFactory factory = TerminalFactory.getDefault(); 
        List<CardTerminal> terminals = factory.terminals().list(); 
      
        //Print list of terminals 
        for(CardTerminal ter:terminals) { 
            System.out.println("Found: "  +ter.getName().toString()); 
            terminal = terminals.get(0);// We assume just one is connected 
        } 
     
        return terminal; 
    }
    
    public boolean IsCardPresent(CardTerminal terminal) throws CardException {
        System.out.println("Waiting for card...");
        
        boolean isCard = false;
        
        while (!isCard) {
            isCard = terminal.waitForCardPresent(0);
            if(isCard)
                System.out.println("Card was found! :-)");
        }
        
        return true;
    }
    
    public CardChannel GetCardAndOpenChannel(CardTerminal terminal) throws CardException {
        Card card = terminal.connect("*");
        CardChannel channel = card.getBasicChannel();
        
        byte[] baReadUID = new byte[5];
        baReadUID = new byte[]{(byte) 0xFF, (byte) 0xCA, (byte) 0x00, (byte) 0x00, (byte) 0x00};
        
        // tag의 uid (unique ID)를 얻은 후 출력
        System.out.println("UID : " + SendCommand(baReadUID, channel));
        
        return channel;
    }
    
    public String selectCardAID(CardChannel channel) {
        
        byte[] baSelectCardAID = new byte[11];
        baSelectCardAID = new byte[]{(byte) 0x00, (byte) 0xA4, (byte) 0x04, (byte) 0x00, (byte)0x05,(byte) 0xF2, (byte) 0x22, (byte) 0x22, (byte) 0x22, (byte) 0x22};
        
        return SendCommand(baSelectCardAID, channel);
    }
    
    public static String SendCommand(byte[] cmd, CardChannel channel) { 
        String response = "";
        byte[] baResp = new byte[258];
         
        ByteBuffer bufCmd = ByteBuffer.wrap(cmd);
        ByteBuffer bufResp = ByteBuffer.wrap(baResp);
         
        int output = 0;
         
        try { 
            output = channel.transmit(bufCmd, bufResp); 
        } catch(CardException ex){ 
            ex.printStackTrace(); 
        } 

        for (int i = 0; i < output; i++) {
            response += String.format("%02X", baResp[i]); 
        }
          
        return response;  
    }
}

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.example.hyunseo.hce_sample">

    <application
        android:allowBackup="true"
        android:icon="@mipmap/ic_launcher"
        android:label="@string/app_name"
        android:supportsRtl="true"
        android:theme="@style/AppTheme">
        <activity android:name=".MainActivity">
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />

                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>

        <service android:name=".CardService"
            android:exported="true"
            android:permission="android.permission.BIND_NFC_SERVICE">
            <!-- Intent filter indicating that we support card emulation. -->
            <intent-filter>
                <action android:name="android.nfc.cardemulation.action.HOST_APDU_SERVICE"/>
                <category android:name="android.intent.category.DEFAULT"/>
            </intent-filter>
            <!-- Required XML configuration file, listing the AIDs that we are emulating cards
                 for. This defines what protocols our card emulation service supports. -->
            <meta-data android:name="android.nfc.cardemulation.host_apdu_service"
                android:resource="@xml/aid_list"/>
        </service>
    </application>

    <uses-permission android:name="android.permission.NFC"/>

</manifest>

package com.example.hyunseo.hce_sample;

import android.content.Intent;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.TextView;

import org.w3c.dom.Text;

public class MainActivity extends AppCompatActivity {
    private TextView _tv;
    private Intent _cardService;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        _tv = (TextView) findViewById(R.id._textView);

        _cardService = new Intent(this, CardService.class);
        startService(_cardService);
    }

    @Override
    protected void onDestroy() {
        stopService(_cardService);
    }

    public void onClickUpdate(View v) {
        _tv.setText("Count : " + Counter.GetCurrentCout());
    }
}

package com.example.hyunseo.hce_sample;

import android.content.Intent;
import android.nfc.cardemulation.HostApduService;
import android.os.Bundle;
import android.os.Message;
import android.os.Messenger;
import android.os.RemoteException;
import android.util.Log;

import java.util.Arrays;

public class CardService extends HostApduService {
    private static final String TAG = "CardService";
    // AID for our loyalty card service.
    private static final String SAMPLE_LOYALTY_CARD_AID = "F222222222";
    // ISO-DEP command HEADER for selecting an AID.
    // Format: [Class | Instruction | Parameter 1 | Parameter 2]
    private static final String SELECT_APDU_HEADER = "00A40400";
    // "OK" status word sent in response to SELECT AID command (0x9000)
    private static final byte[] SELECT_OK_SW = HexStringToByteArray("9000");
    // "UNKNOWN" status word sent in response to invalid APDU command (0x0000)
    private static final byte[] UNKNOWN_CMD_SW = HexStringToByteArray("0000");
    private static final byte[] SELECT_APDU = BuildSelectApdu(SAMPLE_LOYALTY_CARD_AID);

    ////////////////////////////////////////////////////////////////////////////////////
    private Messenger _handler;

    @Override
    public int onStartCommand(Intent intent, int flags, int startId) {
        // UI thread 핸들 얻음
        Bundle extras = intent.getExtras();

        // 서비스를 앱 종료시까지 계속 실행상태로
        return START_STICKY;
    }

    // 외부로부터의 APDU명령을 받았을때 호출
    @Override
    public byte[] processCommandApdu(byte[] commandApdu, Bundle extras) {

        if (Arrays.equals(SELECT_APDU, commandApdu)) {
            Log.i(TAG, "Application selected");

            Counter.AddOne();

            return SELECT_OK_SW;
        } else {
            return UNKNOWN_CMD_SW;
        }
    }

    // 연결을 잃었을때 호출됨
    @Override
    public void onDeactivated(int reason) {
        Log.i(TAG, "Deactivated: " + reason);
    }

    public static byte[] BuildSelectApdu(String aid) {
        // Format: [CLASS | INSTRUCTION | PARAMETER 1 | PARAMETER 2 | LENGTH | DATA]
        return HexStringToByteArray(SELECT_APDU_HEADER + String.format("%02X",
                aid.length() / 2) + aid);
    }

    public static byte[] HexStringToByteArray(String s) throws IllegalArgumentException {
        int len = s.length();
        if (len % 2 == 1) {
            throw new IllegalArgumentException("Hex string must have even number of characters");
        }
        byte[] data = new byte[len / 2]; // Allocate 1 byte per 2 hex characters
        for (int i = 0; i < len; i += 2) {
            // Convert each character into a integer (base-16), then bit-shift into place
            data[i / 2] = (byte) ((Character.digit(s.charAt(i), 16) << 4)
                    + Character.digit(s.charAt(i+1), 16));
        }
        return data;
    }
}

package com.example.hyunseo.hce_sample;


public class Counter {
    private static int _cnt = 0;

    public static void AddOne() {_cnt++;}
    public static int GetCurrentCout() {return _cnt;}
}

<?xml version="1.0" encoding="utf-8"?>
<host-apdu-service xmlns:android="http://schemas.android.com/apk/res/android"
    android:description="@string/service_name"
    android:requireDeviceUnlock="false">

    <aid-group android:description="@string/card_title" android:category="other">
        <aid-filter android:name="F222222222"/>
    </aid-group>
</host-apdu-service>

	blendColor = basePixel * colorPixel * gammaCorrection;

	blendColor = (basePixel * 0.5) + (colorPixel * 0.5);

////////////////////////////////////////////////////////////////////////////////
// Filename: multitexture.vs
////////////////////////////////////////////////////////////////////////////////


/////////////
// GLOBALS //
/////////////
cbuffer MatrixBuffer
{
    matrix worldMatrix;
    matrix viewMatrix;
    matrix projectionMatrix;
};


//////////////
// TYPEDEFS //
//////////////
struct VertexInputType
{
    float4 position : POSITION;
    float2 tex : TEXCOORD0;
};

struct PixelInputType
{
    float4 position : SV_POSITION;
    float2 tex : TEXCOORD0;
};


////////////////////////////////////////////////////////////////////////////////
// Vertex Shader
////////////////////////////////////////////////////////////////////////////////
PixelInputType MultiTextureVertexShader(VertexInputType input)
{
    PixelInputType output;
    

    // Change the position vector to be 4 units for proper matrix calculations.
    input.position.w = 1.0f;

    // Calculate the position of the vertex against the world, view, and projection matrices.
    output.position = mul(input.position, worldMatrix);
    output.position = mul(output.position, viewMatrix);
    output.position = mul(output.position, projectionMatrix);
    
    // Store the texture coordinates for the pixel shader.
    output.tex = input.tex;
    
    return output;
}

////////////////////////////////////////////////////////////////////////////////
// Filename: multitexture.ps
////////////////////////////////////////////////////////////////////////////////


/////////////
// GLOBALS //
/////////////

Texture2D shaderTextures[2];
SamplerState SampleType;


//////////////
// TYPEDEFS //
//////////////
struct PixelInputType
{
    float4 position : SV_POSITION;
    float2 tex : TEXCOORD0;
};

////////////////////////////////////////////////////////////////////////////////
// Pixel Shader
////////////////////////////////////////////////////////////////////////////////
float4 MultiTexturePixelShader(PixelInputType input) : SV_TARGET
{
    float4 color1;
    float4 color2;
    float4 blendColor;


    // Get the pixel color from the first texture.
    color1 = shaderTextures[0].Sample(SampleType, input.tex);

    // Get the pixel color from the second texture.
    color2 = shaderTextures[1].Sample(SampleType, input.tex);

    // Blend the two pixels together and multiply by the gamma value.
    blendColor = color1 * color2 * 2.0;
    
    // Saturate the final color.
    blendColor = saturate(blendColor);

    return blendColor;
}

////////////////////////////////////////////////////////////////////////////////
// Filename: multitextureshaderclass.h
////////////////////////////////////////////////////////////////////////////////
#ifndef _MULTITEXTURESHADERCLASS_H_
#define _MULTITEXTURESHADERCLASS_H_


//////////////
// INCLUDES //
//////////////
#include <d3d11.h>
#include <d3dx10math.h>
#include <d3dx11async.h>
#include <fstream>
using namespace std;


////////////////////////////////////////////////////////////////////////////////
// Class name: MultiTextureShaderClass
////////////////////////////////////////////////////////////////////////////////
class MultiTextureShaderClass
{
private:
	struct MatrixBufferType
	{
		D3DXMATRIX world;
		D3DXMATRIX view;
		D3DXMATRIX projection;
	};

public:
	MultiTextureShaderClass();
	MultiTextureShaderClass(const MultiTextureShaderClass&);
	~MultiTextureShaderClass();

	bool Initialize(ID3D11Device*, HWND);
	void Shutdown();
	bool Render(ID3D11DeviceContext*, int, D3DXMATRIX, D3DXMATRIX, D3DXMATRIX, ID3D11ShaderResourceView**);

private:
	bool InitializeShader(ID3D11Device*, HWND, WCHAR*, WCHAR*);
	void ShutdownShader();
	void OutputShaderErrorMessage(ID3D10Blob*, HWND, WCHAR*);

	bool SetShaderParameters(ID3D11DeviceContext*, D3DXMATRIX, D3DXMATRIX, D3DXMATRIX, ID3D11ShaderResourceView**);
	void RenderShader(ID3D11DeviceContext*, int);

private:
	ID3D11VertexShader* m_vertexShader;
	ID3D11PixelShader* m_pixelShader;
	ID3D11InputLayout* m_layout;
	ID3D11Buffer* m_matrixBuffer;
	ID3D11SamplerState* m_sampleState;
};

#endif

////////////////////////////////////////////////////////////////////////////////
// Filename: multitextureshaderclass.cpp
////////////////////////////////////////////////////////////////////////////////
#include "multitextureshaderclass.h"


MultiTextureShaderClass::MultiTextureShaderClass()
{
	m_vertexShader = 0;
	m_pixelShader = 0;
	m_layout = 0;
	m_matrixBuffer = 0;
	m_sampleState = 0;
}


MultiTextureShaderClass::MultiTextureShaderClass(const MultiTextureShaderClass& other)
{
}


MultiTextureShaderClass::~MultiTextureShaderClass()
{
}


bool MultiTextureShaderClass::Initialize(ID3D11Device* device, HWND hwnd)
{
	bool result;

	// Initialize the vertex and pixel shaders.
	result = InitializeShader(device, hwnd, L"../Engine/multitexture.vs", L"../Engine/multitexture.ps");
	if(!result)
	{
		return false;
	}

	return true;
}

void MultiTextureShaderClass::Shutdown()
{
	// Shutdown the vertex and pixel shaders as well as the related objects.
	ShutdownShader();

	return;
}

bool MultiTextureShaderClass::Render(ID3D11DeviceContext* deviceContext, int indexCount, D3DXMATRIX worldMatrix, 
				     D3DXMATRIX viewMatrix, D3DXMATRIX projectionMatrix, ID3D11ShaderResourceView** textureArray)
{
	bool result;


	// Set the shader parameters that it will use for rendering.
	result = SetShaderParameters(deviceContext, worldMatrix, viewMatrix, projectionMatrix, textureArray);
	if(!result)
	{
		return false;
	}

	// Now render the prepared buffers with the shader.
	RenderShader(deviceContext, indexCount);

	return true;
}

bool MultiTextureShaderClass::InitializeShader(ID3D11Device* device, HWND hwnd, WCHAR* vsFilename, WCHAR* psFilename)
{
	HRESULT result;
	ID3D10Blob* errorMessage;
	ID3D10Blob* vertexShaderBuffer;
	ID3D10Blob* pixelShaderBuffer;
	D3D11_INPUT_ELEMENT_DESC polygonLayout[2];
	unsigned int numElements;
	D3D11_BUFFER_DESC matrixBufferDesc;
	D3D11_SAMPLER_DESC samplerDesc;


	// Initialize the pointers this function will use to null.
	errorMessage = 0;
	vertexShaderBuffer = 0;
	pixelShaderBuffer = 0;

	// Compile the vertex shader code.
	result = D3DX11CompileFromFile(vsFilename, NULL, NULL, "MultiTextureVertexShader", "vs_5_0", D3D10_SHADER_ENABLE_STRICTNESS, 
				       0, NULL, &vertexShaderBuffer, &errorMessage, NULL);
	if(FAILED(result))
	{
		// If the shader failed to compile it should have writen something to the error message.
		if(errorMessage)
		{
			OutputShaderErrorMessage(errorMessage, hwnd, vsFilename);
		}
		// If there was  nothing in the error message then it simply could not find the shader file itself.
		else
		{
			MessageBox(hwnd, vsFilename, L"Missing Shader File", MB_OK);
		}

		return false;
	}

	// Compile the pixel shader code.
	result = D3DX11CompileFromFile(psFilename, NULL, NULL, "MultiTexturePixelShader", "ps_5_0", D3D10_SHADER_ENABLE_STRICTNESS, 
				       0, NULL, &pixelShaderBuffer, &errorMessage, NULL);
	if(FAILED(result))
	{
		// If the shader failed to compile it should have writen something to the error message.
		if(errorMessage)
		{
			OutputShaderErrorMessage(errorMessage, hwnd, psFilename);
		}
		// If there was  nothing in the error message then it simply could not find the file itself.
		else
		{
			MessageBox(hwnd, psFilename, L"Missing Shader File", MB_OK);
		}

		return false;
	}

	// Create the vertex shader from the buffer.
	result = device->CreateVertexShader(vertexShaderBuffer->GetBufferPointer(), vertexShaderBuffer->GetBufferSize(), NULL, 
					    &m_vertexShader);
	if(FAILED(result))
	{
		return false;
	}

	// Create the vertex shader from the buffer.
	result = device->CreatePixelShader(pixelShaderBuffer->GetBufferPointer(), pixelShaderBuffer->GetBufferSize(), NULL, 
					   &m_pixelShader);
	if(FAILED(result))
	{
		return false;
	}

	// Create the vertex input layout description.
	// This setup needs to match the VertexType stucture in the ModelClass and in the shader.
	polygonLayout[0].SemanticName = "POSITION";
	polygonLayout[0].SemanticIndex = 0;
	polygonLayout[0].Format = DXGI_FORMAT_R32G32B32_FLOAT;
	polygonLayout[0].InputSlot = 0;
	polygonLayout[0].AlignedByteOffset = 0;
	polygonLayout[0].InputSlotClass = D3D11_INPUT_PER_VERTEX_DATA;
	polygonLayout[0].InstanceDataStepRate = 0;

	polygonLayout[1].SemanticName = "TEXCOORD";
	polygonLayout[1].SemanticIndex = 0;
	polygonLayout[1].Format = DXGI_FORMAT_R32G32_FLOAT;
	polygonLayout[1].InputSlot = 0;
	polygonLayout[1].AlignedByteOffset = D3D11_APPEND_ALIGNED_ELEMENT;
	polygonLayout[1].InputSlotClass = D3D11_INPUT_PER_VERTEX_DATA;
	polygonLayout[1].InstanceDataStepRate = 0;

	// Get a count of the elements in the layout.
	numElements = sizeof(polygonLayout) / sizeof(polygonLayout[0]);

	// Create the vertex input layout.
	result = device->CreateInputLayout(polygonLayout, numElements, vertexShaderBuffer->GetBufferPointer(), 
					   vertexShaderBuffer->GetBufferSize(), &m_layout);
	if(FAILED(result))
	{
		return false;
	}

	// Release the vertex shader buffer and pixel shader buffer since they are no longer needed.
	vertexShaderBuffer->Release();
	vertexShaderBuffer = 0;

	pixelShaderBuffer->Release();
	pixelShaderBuffer = 0;

	// Setup the description of the matrix dynamic constant buffer that is in the vertex shader.
	matrixBufferDesc.Usage = D3D11_USAGE_DYNAMIC;
	matrixBufferDesc.ByteWidth = sizeof(MatrixBufferType);
	matrixBufferDesc.BindFlags = D3D11_BIND_CONSTANT_BUFFER;
	matrixBufferDesc.CPUAccessFlags = D3D11_CPU_ACCESS_WRITE;
	matrixBufferDesc.MiscFlags = 0;
	matrixBufferDesc.StructureByteStride = 0;

	// Create the matrix constant buffer pointer so we can access the vertex shader constant buffer from within this class.
	result = device->CreateBuffer(&matrixBufferDesc, NULL, &m_matrixBuffer);
	if(FAILED(result))
	{
		return false;
	}

	// Create a texture sampler state description.
	samplerDesc.Filter = D3D11_FILTER_MIN_MAG_MIP_LINEAR;
	samplerDesc.AddressU = D3D11_TEXTURE_ADDRESS_WRAP;
	samplerDesc.AddressV = D3D11_TEXTURE_ADDRESS_WRAP;
	samplerDesc.AddressW = D3D11_TEXTURE_ADDRESS_WRAP;
	samplerDesc.MipLODBias = 0.0f;
	samplerDesc.MaxAnisotropy = 1;
	samplerDesc.ComparisonFunc = D3D11_COMPARISON_ALWAYS;
	samplerDesc.BorderColor[0] = 0;
	samplerDesc.BorderColor[1] = 0;
	samplerDesc.BorderColor[2] = 0;
	samplerDesc.BorderColor[3] = 0;
	samplerDesc.MinLOD = 0;
	samplerDesc.MaxLOD = D3D11_FLOAT32_MAX;

	// Create the texture sampler state.
	result = device->CreateSamplerState(&samplerDesc, &m_sampleState);
	if(FAILED(result))
	{
		return false;
	}

	return true;
}

void MultiTextureShaderClass::ShutdownShader()
{
	// Release the sampler state.
	if(m_sampleState)
	{
		m_sampleState->Release();
		m_sampleState = 0;
	}

	// Release the matrix constant buffer.
	if(m_matrixBuffer)
	{
		m_matrixBuffer->Release();
		m_matrixBuffer = 0;
	}

	// Release the layout.
	if(m_layout)
	{
		m_layout->Release();
		m_layout = 0;
	}

	// Release the pixel shader.
	if(m_pixelShader)
	{
		m_pixelShader->Release();
		m_pixelShader = 0;
	}

	// Release the vertex shader.
	if(m_vertexShader)
	{
		m_vertexShader->Release();
		m_vertexShader = 0;
	}

	return;
}

void MultiTextureShaderClass::OutputShaderErrorMessage(ID3D10Blob* errorMessage, HWND hwnd, WCHAR* shaderFilename)
{
	char* compileErrors;
	unsigned long bufferSize, i;
	ofstream fout;


	// Get a pointer to the error message text buffer.
	compileErrors = (char*)(errorMessage->GetBufferPointer());

	// Get the length of the message.
	bufferSize = errorMessage->GetBufferSize();

	// Open a file to write the error message to.
	fout.open("shader-error.txt");

	// Write out the error message.
	for(i=0; i<bufferSize; i++)
	{
		fout << compileErrors[i];
	}

	// Close the file.
	fout.close();

	// Release the error message.
	errorMessage->Release();
	errorMessage = 0;

	// Pop a message up on the screen to notify the user to check the text file for compile errors.
	MessageBox(hwnd, L"Error compiling shader.  Check shader-error.txt for message.", shaderFilename, MB_OK);

	return;
}

bool MultiTextureShaderClass::SetShaderParameters(ID3D11DeviceContext* deviceContext, D3DXMATRIX worldMatrix, 
						  D3DXMATRIX viewMatrix, D3DXMATRIX projectionMatrix, 
						  ID3D11ShaderResourceView** textureArray)
{
	HRESULT result;
	D3D11_MAPPED_SUBRESOURCE mappedResource;
	MatrixBufferType* dataPtr;
	unsigned int bufferNumber;


	// Transpose the matrices to prepare them for the shader.
	D3DXMatrixTranspose(&worldMatrix, &worldMatrix);
	D3DXMatrixTranspose(&viewMatrix, &viewMatrix);
	D3DXMatrixTranspose(&projectionMatrix, &projectionMatrix);

	// Lock the matrix constant buffer so it can be written to.
	result = deviceContext->Map(m_matrixBuffer, 0, D3D11_MAP_WRITE_DISCARD, 0, &mappedResource);
	if(FAILED(result))
	{
		return false;
	}

	// Get a pointer to the data in the constant buffer.
	dataPtr = (MatrixBufferType*)mappedResource.pData;

	// Copy the matrices into the constant buffer.
	dataPtr->world = worldMatrix;
	dataPtr->view = viewMatrix;
	dataPtr->projection = projectionMatrix;

	// Unlock the matrix constant buffer.
	deviceContext->Unmap(m_matrixBuffer, 0);

	// Set the position of the matrix constant buffer in the vertex shader.
	bufferNumber = 0;

	// Now set the matrix constant buffer in the vertex shader with the updated values.
	deviceContext->VSSetConstantBuffers(bufferNumber, 1, &m_matrixBuffer);

	// Set shader texture array resource in the pixel shader.
	deviceContext->PSSetShaderResources(0, 2, textureArray);

	return true;
}

void MultiTextureShaderClass::RenderShader(ID3D11DeviceContext* deviceContext, int indexCount)
{
	// Set the vertex input layout.
	deviceContext->IASetInputLayout(m_layout);

	// Set the vertex and pixel shaders that will be used to render this triangle.
	deviceContext->VSSetShader(m_vertexShader, NULL, 0);
	deviceContext->PSSetShader(m_pixelShader, NULL, 0);

	// Set the sampler state in the pixel shader.
	deviceContext->PSSetSamplers(0, 1, &m_sampleState);

	// Render the triangles.
	deviceContext->DrawIndexed(indexCount, 0, 0);

	return;
}

////////////////////////////////////////////////////////////////////////////////
// Filename: texturearrayclass.h
////////////////////////////////////////////////////////////////////////////////
#ifndef _TEXTUREARRAYCLASS_H_
#define _TEXTUREARRAYCLASS_H_


//////////////
// INCLUDES //
//////////////
#include <d3d11.h>
#include <d3dx11tex.h>


////////////////////////////////////////////////////////////////////////////////
// Class name: TextureArrayClass
////////////////////////////////////////////////////////////////////////////////
class TextureArrayClass
{
public:
	TextureArrayClass();
	TextureArrayClass(const TextureArrayClass&);
	~TextureArrayClass();

	bool Initialize(ID3D11Device*, WCHAR*, WCHAR*);
	void Shutdown();

	ID3D11ShaderResourceView** GetTextureArray();

private:

	ID3D11ShaderResourceView* m_textures[2];
};

#endif

////////////////////////////////////////////////////////////////////////////////
// Filename: texturearrayclass.cpp
////////////////////////////////////////////////////////////////////////////////
#include "texturearrayclass.h"

TextureArrayClass::TextureArrayClass()
{
	m_textures[0] = 0;
	m_textures[1] = 0;
}


TextureArrayClass::TextureArrayClass(const TextureArrayClass& other)
{
}


TextureArrayClass::~TextureArrayClass()
{
}

bool TextureArrayClass::Initialize(ID3D11Device* device, WCHAR* filename1, WCHAR* filename2)
{
	HRESULT result;


	// Load the first texture in.
	result = D3DX11CreateShaderResourceViewFromFile(device, filename1, NULL, NULL, &m_textures[0], NULL);
	if(FAILED(result))
	{
		return false;
	}

	// Load the second texture in.
	result = D3DX11CreateShaderResourceViewFromFile(device, filename2, NULL, NULL, &m_textures[1], NULL);
	if(FAILED(result))
	{
		return false;
	}

	return true;
}

void TextureArrayClass::Shutdown()
{
	// Release the texture resources.
	if(m_textures[0])
	{
		m_textures[0]->Release();
		m_textures[0] = 0;
	}

	if(m_textures[1])
	{
		m_textures[1]->Release();
		m_textures[1] = 0;
	}

	return;
}

ID3D11ShaderResourceView** TextureArrayClass::GetTextureArray()
{
	return m_textures;
}

////////////////////////////////////////////////////////////////////////////////
// Filename: modelclass.h
////////////////////////////////////////////////////////////////////////////////
#ifndef _MODELCLASS_H_
#define _MODELCLASS_H_


//////////////
// INCLUDES //
//////////////
#include <d3d11.h>
#include <d3dx10math.h>
#include <fstream>
using namespace std;

///////////////////////
// MY CLASS INCLUDES //
///////////////////////
#include "texturearrayclass.h"


////////////////////////////////////////////////////////////////////////////////
// Class name: ModelClass
////////////////////////////////////////////////////////////////////////////////
class ModelClass
{
private:
	struct VertexType
	{
		D3DXVECTOR3 position;
		D3DXVECTOR2 texture;
	};

	struct ModelType
	{
		float x, y, z;
		float tu, tv;
		float nx, ny, nz;
	};

public:
	ModelClass();
	ModelClass(const ModelClass&);
	~ModelClass();

	bool Initialize(ID3D11Device*, char*, WCHAR*, WCHAR*);
	void Shutdown();
	void Render(ID3D11DeviceContext*);

	int GetIndexCount();
	ID3D11ShaderResourceView** GetTextureArray();

private:
	bool InitializeBuffers(ID3D11Device*);
	void ShutdownBuffers();
	void RenderBuffers(ID3D11DeviceContext*);

	bool LoadTextures(ID3D11Device*, WCHAR*, WCHAR*);
	void ReleaseTextures();

	bool LoadModel(char*);
	void ReleaseModel();

private:
	ID3D11Buffer *m_vertexBuffer, *m_indexBuffer;
	int m_vertexCount, m_indexCount;
	ModelType* m_model;

	TextureArrayClass* m_TextureArray;
};

#endif

////////////////////////////////////////////////////////////////////////////////
// Filename: modelclass.cpp
////////////////////////////////////////////////////////////////////////////////
#include "modelclass.h"


ModelClass::ModelClass()
{
	m_vertexBuffer = 0;
	m_indexBuffer = 0;
	m_model = 0;

	m_TextureArray = 0;
}


bool ModelClass::Initialize(ID3D11Device* device, char* modelFilename, WCHAR* textureFilename1, WCHAR* textureFilename2)
{
	bool result;


	// Load in the model data,
	result = LoadModel(modelFilename);
	if(!result)
	{
		return false;
	}

	// Initialize the vertex and index buffers.
	result = InitializeBuffers(device);
	if(!result)
	{
		return false;
	}

	// Load the textures for this model.
	result = LoadTextures(device, textureFilename1, textureFilename2);
	if(!result)
	{
		return false;
	}

	return true;
}


void ModelClass::Shutdown()
{

	// Release the model textures.
	ReleaseTextures();

	// Shutdown the vertex and index buffers.
	ShutdownBuffers();

	// Release the model data.
	ReleaseModel();

	return;
}

ID3D11ShaderResourceView** ModelClass::GetTextureArray()
{
	return m_TextureArray->GetTextureArray();
}

bool ModelClass::LoadTextures(ID3D11Device* device, WCHAR* filename1, WCHAR* filename2)
{
	bool result;


	// Create the texture array object.
	m_TextureArray = new TextureArrayClass;
	if(!m_TextureArray)
	{
		return false;
	}

	// Initialize the texture array object.
	result = m_TextureArray->Initialize(device, filename1, filename2);
	if(!result)
	{
		return false;
	}

	return true;
}

void ModelClass::ReleaseTextures()
{
	// Release the texture array object.
	if(m_TextureArray)
	{
		m_TextureArray->Shutdown();
		delete m_TextureArray;
		m_TextureArray = 0;
	}

	return;
}

////////////////////////////////////////////////////////////////////////////////
// Filename: graphicsclass.h
////////////////////////////////////////////////////////////////////////////////
#ifndef _GRAPHICSCLASS_H_
#define _GRAPHICSCLASS_H_


/////////////
// GLOBALS //
/////////////
const bool FULL_SCREEN = true;
const bool VSYNC_ENABLED = true;
const float SCREEN_DEPTH = 1000.0f;
const float SCREEN_NEAR = 0.1f;


///////////////////////
// MY CLASS INCLUDES //
///////////////////////
#include "d3dclass.h"
#include "cameraclass.h"
#include "modelclass.h"

#include "multitextureshaderclass.h"


////////////////////////////////////////////////////////////////////////////////
// Class name: GraphicsClass
////////////////////////////////////////////////////////////////////////////////
class GraphicsClass
{
public:
	GraphicsClass();
	GraphicsClass(const GraphicsClass&);
	~GraphicsClass();

	bool Initialize(int, int, HWND);
	void Shutdown();
	bool Frame();
	bool Render();

private:
	D3DClass* m_D3D;
	CameraClass* m_Camera;
	ModelClass* m_Model;

	MultiTextureShaderClass* m_MultiTextureShader;
};

#endif

////////////////////////////////////////////////////////////////////////////////
// Filename: graphicsclass.cpp
////////////////////////////////////////////////////////////////////////////////
#include "graphicsclass.h"


GraphicsClass::GraphicsClass()
{
	m_D3D = 0;
	m_Camera = 0;
	m_Model = 0;

	m_MultiTextureShader = 0;
}


bool GraphicsClass::Initialize(int screenWidth, int screenHeight, HWND hwnd)
{
	bool result;
	D3DXMATRIX baseViewMatrix;

		
	// Create the Direct3D object.
	m_D3D = new D3DClass;
	if(!m_D3D)
	{
		return false;
	}

	// Initialize the Direct3D object.
	result = m_D3D->Initialize(screenWidth, screenHeight, VSYNC_ENABLED, hwnd, FULL_SCREEN, SCREEN_DEPTH, SCREEN_NEAR);
	if(!result)
	{
		MessageBox(hwnd, L"Could not initialize Direct3D", L"Error", MB_OK);
		return false;
	}

	// Create the camera object.
	m_Camera = new CameraClass;
	if(!m_Camera)
	{
		return false;
	}

	// Initialize a base view matrix with the camera for 2D user interface rendering.
	m_Camera->SetPosition(0.0f, 0.0f, -1.0f);
	m_Camera->Render();
	m_Camera->GetViewMatrix(baseViewMatrix);

	// Create the model object.
	m_Model = new ModelClass;
	if(!m_Model)
	{
		return false;
	}

	// Initialize the model object.
	result = m_Model->Initialize(m_D3D->GetDevice(), "../Engine/data/square.txt", L"../Engine/data/stone01.dds", 
				     L"../Engine/data/dirt01.dds");
	if(!result)
	{
		MessageBox(hwnd, L"Could not initialize the model object.", L"Error", MB_OK);
		return false;
	}

	// Create the multitexture shader object.
	m_MultiTextureShader = new MultiTextureShaderClass;
	if(!m_MultiTextureShader)
	{
		return false;
	}

	// Initialize the multitexture shader object.
	result = m_MultiTextureShader->Initialize(m_D3D->GetDevice(), hwnd);
	if(!result)
	{
		MessageBox(hwnd, L"Could not initialize the multitexture shader object.", L"Error", MB_OK);
		return false;
	}

	return true;
}


void GraphicsClass::Shutdown()
{

	// Release the multitexture shader object.
	if(m_MultiTextureShader)
	{
		m_MultiTextureShader->Shutdown();
		delete m_MultiTextureShader;
		m_MultiTextureShader = 0;
	}

	// Release the model object.
	if(m_Model)
	{
		m_Model->Shutdown();
		delete m_Model;
		m_Model = 0;
	}

	// Release the camera object.
	if(m_Camera)
	{
		delete m_Camera;
		m_Camera = 0;
	}

	// Release the D3D object.
	if(m_D3D)
	{
		m_D3D->Shutdown();
		delete m_D3D;
		m_D3D = 0;
	}

	return;
}


bool GraphicsClass::Frame()
{

	// Set the position of the camera.
	m_Camera->SetPosition(0.0f, 0.0f, -5.0f);

	return true;
}


bool GraphicsClass::Render()
{
	D3DXMATRIX worldMatrix, viewMatrix, projectionMatrix, orthoMatrix;


	// Clear the buffers to begin the scene.
	m_D3D->BeginScene(0.0f, 0.0f, 0.0f, 1.0f);

	// Generate the view matrix based on the camera's position.
	m_Camera->Render();

	// Get the world, view, projection, and ortho matrices from the camera and D3D objects.
	m_D3D->GetWorldMatrix(worldMatrix);
	m_Camera->GetViewMatrix(viewMatrix);
	m_D3D->GetProjectionMatrix(projectionMatrix);
	m_D3D->GetOrthoMatrix(orthoMatrix);

	// Put the model vertex and index buffers on the graphics pipeline to prepare them for drawing.
	m_Model->Render(m_D3D->GetDeviceContext());

	// Render the model using the multitexture shader.
	m_MultiTextureShader->Render(m_D3D->GetDeviceContext(), m_Model->GetIndexCount(), worldMatrix, viewMatrix, projectionMatrix,
				     m_Model->GetTextureArray());

	// Present the rendered scene to the screen.
	m_D3D->EndScene();

	return true;
}

main.cpp

#include "IOCPServer.h"

int main()
{
    IOCPServer *s = new IOCPServer();

    s->Init();

    s->Run();

    delete s;
    return 0;
}

IOCPServer.h

#pragma once

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <process.h>
#include <winsock2.h>

#define PORT        9088
#define BUFSIZE     1024
#define READ        3
#define WRITE       5

///////////////////////////////////////////////
// Structure Definition
typedef struct          // 소켓 정보를 구조체화
{
    SOCKET      hClntSock;
    SOCKADDR_IN clntAddr;
} PER_HANDLE_DATA, *LPPER_HANDLE_DATA;

typedef struct          // 소켓의 버퍼 정보를 구조체화
{
    OVERLAPPED overlapped;
    CHAR       buffer[BUFSIZE];
    WSABUF     wsaBuf;
    int        rwMode;
} PER_IO_DATA, *LPPER_IO_DATA;


////////////////////////////////////////////////
// Class definition
class IOCPServer {
public:
    IOCPServer();
    ~IOCPServer();

    bool Run();
    bool Init();
    void Cleanup();

    bool setSocket();

    static unsigned int __stdcall _CompletionThread(void *p_this);
    UINT WINAPI CompletionThread();

private:
    HANDLE  m_hCompletionPort;

    SOCKET m_hServSock;
    SOCKADDR_IN m_servAddr;
};

//////////////////////////////////////////
// Function forward declaration
void ErrorHandling(LPCSTR pszMessage);

IOCPServer.cpp

#include "IOCPServer.h"

IOCPServer::IOCPServer()
{
}

IOCPServer::~IOCPServer()
{
    closesocket(m_hServSock);
    WSACleanup();
}

bool IOCPServer::Init()
{
    WSAData wsaData;
    SYSTEM_INFO systemInfo;

    if (WSAStartup(MAKEWORD(2, 2), &wsaData) != 0)
    {   // Load Winsock 2.2 DLL
        ErrorHandling("WSAStartup() error!");
    }


    // Completion Port 생성
    m_hCompletionPort = CreateIoCompletionPort(INVALID_HANDLE_VALUE, NULL, 0, 0);
    GetSystemInfo(&systemInfo);

    // 쓰레드를 CPU 개수*2 만큼 생성
    for (int i = 0; i<systemInfo.dwNumberOfProcessors*2; i++)
    {
        _beginthreadex(NULL, 0, _CompletionThread, (LPVOID)this, 0, NULL);
    }

    setSocket();

    return true;
}

void IOCPServer::Cleanup()
{
}

bool IOCPServer::setSocket()
{
    // IOCP를 사용하기 위한 소켓 생성 (Overlapped I/O 소켓, 윈도우용)
    m_hServSock = WSASocket(PF_INET, SOCK_STREAM, 0, NULL, 0, WSA_FLAG_OVERLAPPED);
    if (m_hServSock == INVALID_SOCKET)
    {
        ErrorHandling("WSASocket() error!");
    }

    // 바인딩할 소켓 주소정보
    memset(&m_servAddr, 0, sizeof(m_servAddr));
    m_servAddr.sin_family = AF_INET;
    m_servAddr.sin_addr.s_addr = htonl(INADDR_ANY);
    m_servAddr.sin_port = htons(PORT);

    if (bind(m_hServSock, (SOCKADDR *)&m_servAddr, sizeof(m_servAddr)) == SOCKET_ERROR)
    {
        ErrorHandling("bind() error!");
    }

    if (listen(m_hServSock, 10) == SOCKET_ERROR)
    {
        ErrorHandling("listen() error!");
    }

    return true;
}

bool IOCPServer::Run()
{
    LPPER_IO_DATA     perIoData;
    LPPER_HANDLE_DATA perHandleData;

    DWORD  dwRecvBytes;
    DWORD  i, dwFlags;

    while (TRUE)
    {
        SOCKET      hClntSock;
        SOCKADDR_IN clntAddr;
        int         nAddrLen = sizeof(clntAddr);

        hClntSock = accept(m_hServSock, (SOCKADDR *)&clntAddr, &nAddrLen);
        if (hClntSock == INVALID_SOCKET)
        {
            ErrorHandling("accept() error!");
        }

        // 연결된 클라이언트의 소켓 핸들 정보와 주소 정보를 설정
        perHandleData = new PER_HANDLE_DATA;
        perHandleData->hClntSock = hClntSock;
        memcpy(&(perHandleData->clntAddr), &clntAddr, nAddrLen);

        // 3. Overlapped 소켓과 Completion Port 의 연결
        CreateIoCompletionPort((HANDLE)hClntSock, m_hCompletionPort, (DWORD)perHandleData, 0);

        // 클라이언트를 위한 버퍼를 설정, OVERLAPPED 변수 초기화
        perIoData = new PER_IO_DATA;
        memset(&(perIoData->overlapped), 0, sizeof(OVERLAPPED));
        perIoData->wsaBuf.len = BUFSIZE;
        perIoData->wsaBuf.buf = perIoData->buffer;
        perIoData->rwMode = READ;
        dwFlags = 0;

        // 4. 중첩된 데이타 입력
        WSARecv(perHandleData->hClntSock,       // 데이타 입력 소켓
            &(perIoData->wsaBuf),               // 데이타 입력 버퍼 포인터
            1,                                  // 데이타 입력 버퍼의 수
            &dwRecvBytes,
            &dwFlags,
            &(perIoData->overlapped),           // OVERLAPPED 변수 포인터
            NULL
        );
    }

    return true;
}


unsigned int __stdcall IOCPServer::_CompletionThread(void *p_this)
{
    IOCPServer* p_IOCPServer = static_cast<IOCPServer*>(p_this);
    p_IOCPServer->CompletionThread(); // Non-static member function!
    return 0;
}

UINT WINAPI IOCPServer::CompletionThread()
{
    HANDLE hCompletionPort = (HANDLE)m_hCompletionPort;
    SOCKET hClntSock;
    DWORD  dwBytesTransferred;
    LPPER_HANDLE_DATA perHandleData;
    LPPER_IO_DATA     perIoData;
    DWORD  dwFlags;

    while (TRUE)
    {
        // 5. 입.출력이 완료된 소켓의 정보 얻음
        GetQueuedCompletionStatus(hCompletionPort,      // Completion Port
                                &dwBytesTransferred,    // 전송된 바이트 수
                                (LPDWORD)&perHandleData,
                                (LPOVERLAPPED *)&perIoData,
                                INFINITE);

        //printf("GQCS error code : %d (TID : %d)\n", GetLastError(), GetCurrentThreadId());

        if (perIoData->rwMode == READ)
        {
            puts("message received!");
            if (dwBytesTransferred == 0)        // 전송된 바이트가 0일때 종료 (EOF 전송 시에도)
            {
                puts("socket will be closed!");
                closesocket(perHandleData->hClntSock);

                delete perHandleData;
                delete perIoData;

                continue;
            }

            // 6. 메세지. 클라이언트로 에코
            memset(&(perIoData->overlapped), 0, sizeof(OVERLAPPED));
            perIoData->wsaBuf.len = dwBytesTransferred;
            perIoData->rwMode = WRITE;
            WSASend(perHandleData->hClntSock, &(perIoData->wsaBuf), 1, NULL, 0, &(perIoData->overlapped), NULL);

            // RECEIVE AGAIN
            perIoData = new PER_IO_DATA();
            memset(&(perIoData->overlapped), 0, sizeof(OVERLAPPED));
            perIoData->wsaBuf.len = BUFSIZE;
            perIoData->wsaBuf.buf = perIoData->buffer;
            perIoData->rwMode = READ;
            dwFlags = 0;
            WSARecv(perHandleData->hClntSock, &(perIoData->wsaBuf), 1, NULL, &dwFlags, &(perIoData->overlapped), NULL);
        }
        else // WRITE Mode
        {
            puts("message sent!");
            delete perIoData;
        }
    }

    return 0;
}


void ErrorHandling(LPCSTR pszMessage)
{
    fputs(pszMessage, stderr);
    fputc('\n', stderr);
    exit(1);
}

MainActivity.java

package com.example.hyunseo.testingapp;

import android.app.ProgressDialog;
import android.os.Handler;
import android.os.Message;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.*;


public class MainActivity extends AppCompatActivity implements View.OnClickListener {
    private Button m_bCreateSocket;
    private Button m_bSend;
    private EditText m_etInputIP;
    private EditText m_etInputPort;
    private EditText m_etSendData;
    private ProgressDialog m_pdIsLoading;

    private SocketManager m_hSocketManager;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        m_etInputIP = (EditText) findViewById(R.id.editText_inputIP);
        m_etInputPort = (EditText) findViewById(R.id.editText_inputPort);
        m_etSendData = (EditText) findViewById(R.id.editText_sendData);
        m_pdIsLoading = new ProgressDialog(this);

        // 클릭 이벤트 리스너 등록
        m_bCreateSocket.setOnClickListener(this);
        m_bSend.setOnClickListener(this);
    }

    private Handler m_Handler = new Handler() {
        public void handleMessage(Message msg) {
            switch(msg.what) {
                case 0: // 소켓 생성 완료
                    // 로딩화면 제거
                    m_pdIsLoading.dismiss();
                    break;
                case 1: // 데이터 수신 완료
                    // 수신 데이터 토스트로 띄움.
                    Toast.makeText(MainActivity.this, "server responded : " + msg.obj, Toast.LENGTH_SHORT).show();
                    break;
            }
        }
    };

    public void onClick(View v) {
        switch (v.getId()) {
            case R.id.button_CreateSocket:
                String IP = m_etInputIP.getText().toString();
                int Port = Integer.parseInt(m_etInputPort.getText().toString());

                m_pdIsLoading.setProgressStyle(ProgressDialog.STYLE_SPINNER);
                m_pdIsLoading.setMessage("Loading..");
                m_pdIsLoading.show();

                m_hSocketManager = new SocketManager(IP, Port, m_Handler);
                break;

            case R.id.button_Send:
                m_hSocketManager.sendData(m_etSendData.getText().toString());
                break;
        }
    }
}

SocketManager.java

package com.example.hyunseo.testingapp;

import android.os.Handler;
import android.os.Message;

import java.io.IOException;
import java.net.InetSocketAddress;
import java.nio.ByteBuffer;
import java.nio.channels.SelectionKey;
import java.nio.channels.Selector;
import java.nio.channels.SocketChannel;
import java.nio.charset.Charset;
import java.nio.charset.CharsetDecoder;
import java.util.Iterator;


public class SocketManager {
    private String IP;
    private int Port;

    private SocketChannel m_hSocketChannel;
    private Selector m_hSelector;

    private readDataThread m_readData;
    private sendDataThread m_sendData;

    private Handler m_handler;

    public SocketManager(String ip, int port, Handler h) {
        this.IP = ip;
        this.Port = port;
        this.m_handler = h;

        // thread objects의 작업 할당 및 초기화
        m_readData = new readDataThread();
        m_readData.start();
    }

    // m_createSocket thread 안에서 실행
    private void setSocket(String ip, int port) throws IOException {
        // selector 생성
        m_hSelector = Selector.open();
        // 채널 생성
        m_hSocketChannel = SocketChannel.open(new InetSocketAddress(ip, port));
        // 논블로킹 모드 설정
        m_hSocketChannel.configureBlocking(false);
        // 소켓 채널을 selector에 등록
        m_hSocketChannel.register(m_hSelector, SelectionKey.OP_CONNECT | SelectionKey.OP_READ | SelectionKey.OP_WRITE);
    }

    public void sendData(String data) {
        m_sendData = new sendDataThread(m_hSocketChannel, data);
        m_sendData.start();
    }

    private void read(SelectionKey key) throws Exception {
        // SelectionKey로부터 소켓채널을 얻어온다.
        SocketChannel sc = (SocketChannel) key.channel();
        // ByteBuffer를 생성한다.
        ByteBuffer buffer = ByteBuffer.allocate(1024);
        int read = 0;

        // 요청한 클라이언트의 소켓채널로부터 데이터를 읽어들인다.
        read = sc.read(buffer);
        buffer.flip();

        String data = new String();
        CharsetDecoder decoder = Charset.forName("UTF-8").newDecoder();
        data = decoder.decode(buffer).toString();

        // 메시지 얻어오기
        Message msg = m_handler.obtainMessage();
        // 메시지 ID 설정
        msg.what = 1;
        // 메시지 정보 설정3 (Object 형식)
        msg.obj = data;
        m_handler.sendMessage(msg);

        // 버퍼 메모리를 해제한다.
        clearBuffer(buffer);
    }

    private void clearBuffer(ByteBuffer buffer) {
        if (buffer != null) {
            buffer.clear();
            buffer = null;
        }
    }

    /*********** inner thread classes **************/
    public class sendDataThread extends Thread {
        private SocketChannel sdt_hSocketChannel;
        private String data;

        public sendDataThread(SocketChannel sc, String d) {
            sdt_hSocketChannel = sc;
            data = d;
        }

        public void run() {
            try {
                // 데이터 전송.
                sdt_hSocketChannel.write(ByteBuffer.wrap(data.getBytes()));
            } catch (Exception e1) {

            }
        }
    }

    public class readDataThread extends Thread {

        public readDataThread() {

        }

        public void run() {
            try {
                setSocket(IP, Port);
            } catch (IOException e) {
                e.printStackTrace();
            }

            // 소켓 생성 완료를 메인UI스레드에 알림.
            m_handler.obtainMessage();
            m_handler.sendEmptyMessage(0);

            // 데이터 읽기 시작.
            try {
                while(true) {
                    // 셀렉터의 select() 메소드로 준비된 이벤트가 있는지 확인한다.
                    m_hSelector.select();

                    // 셀렉터의 SelectoedSet에 저장된 준비된 이벤트들(SelectionKey)을 하나씩 처리한다.
                    Iterator it = m_hSelector.selectedKeys().iterator();

                    while (it.hasNext()) {
                        SelectionKey key = (SelectionKey) it.next();

                        if (key.isReadable()) {
                            // 이미 연결된 클라이언트가 메시지를 보낸경우...
                            try {
                                read(key);
                            } catch (Exception e) {

                            }
                        }
                        // 이미 처리한 이벤트므로 반드시 삭제해준다.
                        it.remove();
                    }

                }
            } catch (Exception e) {
            }
        }
    }
}