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      "body": "카카오톡같은, 또는 페이스북 메시지 같은 채팅은 어떻게 만드는걸까?\n\n\n채팅이라는 기능이 많은곳에 사용이 되고 있는데요 \n\n요즘 인기가 있는 React Native라는 친구를 이용해서 간단한 채팅 어플을 만들어 보겠습니다.\n\n<br>\n\n**위 포스팅은 JavaScript와 Android Studio에 대한 간단한 지식을 요구합니다.**\n\n<br>\n\n일단 시작하기 전에 우리가 만들어 볼 어플리케이션의 데모 부터 보고 시작하겠습니다.\n\n<br>\n<div align= 'center'>\n\n\n![68747470733a2f2f7468756d62732e6766796361742e636f6d2f4162736f6c757465536164446f6265726d616e70696e73636865722d73697a655f726573747269637465642e676966.gif](https://cdn.steemitimages.com/DQmfDXdZqUVhwRPfUspF7sVKW85wMFnitv5AFXWS8YZBXq9/68747470733a2f2f7468756d62732e6766796361742e636f6d2f4162736f6c757465536164446f6265726d616e70696e73636865722d73697a655f726573747269637465642e676966.gif)\n 출처 -- github GiftedChat\n https://github.com/FaridSafi/react-native-gifted-chat\n</div>\n\n<br>\n간단하면서도 깔끔한 디자인이 돋보이는 라이브러리입니다.\n\n<br>\n\n위 어플리케이션을 만들기 위한 준비물들을 알아보겠습니다.\n<br>\n**클라이언트**\n* React Native \n* Node.js\n* Visual Studio Code ( 사용하시는 에디터가 있으면 필요 없습니다 )\n* Gifted Chat (npm)\n\n\n**서버**\n* Socket.io (npm)\n* Express (npm)\n\n\n<br>\n\n설치방법\n\n1. React Native + Node.js\n<br>\nFaceBook 에서 개발한 JS기반 하이브리드 웹앱 프레임워크 입니다.\nhttps://facebook.github.io/react-native/docs/getting-started.html\nReact Native 를 설치하기 위해선 일단, 3가지 프로그램의 설치가 선행되어야하는데요,\n&nbsp;&nbsp;&nbsp;- Node.js\n&nbsp;&nbsp;&nbsp;- python ( 2.7 )  * 3 버전은 지원되는지 잘 모르겠습니다..\n&nbsp;&nbsp;&nbsp;- jdk 8++\n위 프로그램들을 개별적으로 설치하시거나, 한번에 설치하는 방법이 있는데요.\n한번에 설치하는것은 Chocolatey 라는 친구를 이용해서  설치하면 됩니다.<br>\nCMD 창을 **관리자권한으로** 열어주시고,<Br>\n<em>\n@\"%SystemRoot%\\System32\\WindowsPowerShell\\v1.0\\powershell.exe\" -NoProfile -InputFormat None -ExecutionPolicy Bypass -Command \"iex ((New-Object System.Net.WebClient).DownloadString('https://chocolatey.org/install.ps1'))\" && SET \"PATH=%PATH%;%ALLUSERSPROFILE%\\chocolatey\\bin\"\n</em>\n위 명령어를 복사해서 붙여넣기 해주신 뒤에,  엔터를 눌러주시면 설치가 시작됩니다.\n그 다음 설치가 완료되면 cmd창을 재실행 시킨뒤(재실행 해야 choco를 이용할수있어요)<br> \nchoco install -y nodejs.install python2 jdk8\n이라는 명령어를 cmd 창에 입력해주세요, (관리자 권한)\n(*만약 미리 설치가 되어있는 프로그램이 있으면 빼주세요)<br>\n이제 React Native 프로젝트를 만들어주는 npm 노드 모듈을 설치할겁니다.<br>\n<em> **\" npm install -g react-native-cli \"**</em> 를 cmd 창에서 입력해주세요,\n<br>\n방금 설치한 모듈은 안드로이드 스튜디오로 치면 New Project 같은 기능을 해줍니다.<br>\n프로젝트를 담아둘 폴더를 하나 만들어주세요, cmd에 익숙해져야 하기 때문에 cmd로 한번 해보겠습니다.\ncmd로 알맞은 경로로 이동한 뒤, \" <em> mkdir </em>  폴더이름  \" 을 입력해주세요 \n그다음, 생성한 폴더로 이동해주세요 ( *** 폴더 경로 이동 명령어는 cd입니다)\n![](https://cdn.steemitimages.com/DQmVNwQxmPs47ZxAxkd2t2y26q1xNQqCWiUdzxGETjBUMKJ/image.png)<br>\n이제 React Project를 만들어 볼텐데요, 이동한 폴더에서\n<em> **\" react-native init 프로젝트이름 \"**</em>  으로 프로젝트를 생성해 주세요. ( 시간이 약간 걸립니다 )\n이제 프로젝트를 만들어 설치하기 위한 작업을 시작하겠습니다.\n프로젝트를 컴파일 하기 위해서는 Android SDK가 필요한데요, Android Studio를 설치해 주세요.\nhttps://developer.android.com/studio/index.html\n그 다음,  SDK Manager라는 곳에 들어가 아래 4가지를 설치하시면 됩니다.\n&nbsp;&nbsp;&nbsp;- Google APIs\n&nbsp;&nbsp;&nbsp;- Android SDK Platform 23\n&nbsp;&nbsp;&nbsp;- Intel x86 Atom_64 System Image\n&nbsp;&nbsp;&nbsp;- Google APIs Intel x86 Atom_64 System Image\n![](https://cdn.steemitimages.com/DQmUyjP9oQN3qg52rATP1rF4UC6LadqFg985NPzoUsrdM5E/image.png)<br>\n![](https://cdn.steemitimages.com/DQmb7n9T3r84uHjXVLGdKN3UBAXqBob8Jy7YKZk364Fdkhw/image.png)\n<br>각자 User 이름에 맞게 시스템 환경변수도 추가해주세요\n![](https://cdn.steemitimages.com/DQmey67TGf3upo5EWBFTjxgoF7SCXsh8d3NwBBeBMr4uLJF/image.png)\n<br>\n**이제 프로젝트를 컴파일 하기 위한 모든 준비가 끝났습니다.**<br>\n가상 기기를 띄우거나, 실제 기기를 연결한구 usb 디버깅 체크해주고,\ncmd에서 아까 프로젝트를 init 했던 디렉토리로 들어가 \n<em> **\" react-native run-android\"**</em> 를 cmd 창에서 입력해주세요.\n아래와 같은 화면이 떴다면 성공입니다.\n<br>\n![](https://cdn.steemitimages.com/DQmbZpbJYT2aMZLqPHjozzGzd9ZEuPPWS3Sjv1YKuWwXqZV/image.png)\n\n2. Visual Studio Code\n<br>코드를 입력하고 수정하기 위해서 editor가 필요한데요, 저는 이 에디터가 가장 가볍고 편한것 같습니다.\nhttps://code.visualstudio.com/\n\n3. GiftedChat 설치하기.\n<br>\nGiftedChat은 채팅 ui 라이브러리입니다.\nGiftedChat github : https://github.com/FaridSafi/react-native-gifted-chat\n깃허브 페이지에 메소드나 예제 코드가 많으니 이곳을 참조하시면 좀 더 향상된 ui를 제작할 수 있습니다.<br>\n이제 프로젝트에 GiftedChat을 설치하기 위해 아까 만들어 두었던 폴더를 들어가주세요,\n그다음 cmd에서  <em> **\" npm install react-native-gifted-chat --save \"**</em> 를 입력해서 설치해주세요.\n\n<br>\n**이 과정까지 다 마치시면 채팅 어플을 만들기 위한 준비가 모두 끝났습니다**\n\n일단 이번 포스팅에서는 개발툴 설치와 간단한 설명을 했는데요\n긴 글 읽어주셔서 감사하고 다음 포스팅부터 본격적인 개발에 들어가 보도록 하겠습니다.",
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      "body": "안녕하세요, 컴퓨터공학을 전공 하고 있는 대학생입니다.\n\n졸업 프로젝트를 준비하면서 여러가지 공부를 하고 있습니다.\n\n대부분의 프로그램에서 데이터베이스를 빼놓고는 생각하기 힘들 정도로 밀접한 관련을 지니고 있는데요,\n\n안드로이드 어플리케이션 역시 예외는 아닙니다.\n\n하지만, 안드로이드에서는 보안문제 때문에 직접 데이터베이스에 접근이 불가능 하기 때문에, \n\n한단계 거쳐서 데이터를 가져와야 합니다. \n\n==>  안드로이드 내에서 외부 클래스의 접근을 막아놓았기 때문이라고 합니다.\n\n\n\nPHP 또는 JSP를 통해서 데이터를 웹페이지에 띄우고, 이것을 크롤링 한뒤 사용하는 방법을 주로 이용하는데요,\n\n생각보다 복잡하기 때문에 프로그래밍 하면서 겪었던 에러나 문제점들을 같이 공유하고자 이글을 쓰게 되었습니다.\n\n\n간단하게 정리하자면,\n\n\n<H2 > DataBase   ->   php/jsp(웹페이지)  ->  안드로이드 </H2>\n \n\n이렇게 데이터가 이동하게 됩니다. \n\n\n또한, 이런 구조를 만들기 위해서 여러 사전작업이 필요한데요,\n\n<table>\n<tr>\n\n<td>MYSQL 설치</td>\n\n<td>Apache 설치</td>\n<td>php/Tomcat 설치</td>\n\n\n</table>\n\n위 세가지 작업이 선행되어야 합니다.\n\n\n<br>\n\n물론 홈페이지에 직접 들어가서 하나씩  설치받는것이 가장 좋ㄱ겠으나,  그러면 서버의 설정이나 서버를 껐다 켰다 하는것이 불편합니다.\n\n그래서 저는 위에 3가지를 한번에 할 수 있는 툴을 이용해서 설치했습니다. (윈도우 기준)\n\n바로 XAMPP 라는 프로그램을 이용했는데요,\n\nhttps://www.apachefriends.org/index.html\n\n위 링크를 클릭하신 뒤 본인 운영체제에 맞는 프로그램을 설치하시면 됩니다.",
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