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안드로이드 웹앱 콘테츠 개발자 양성(국비지원)/HTML 도메인

HTTP 서버와 앱 연동

by 차누감 2019. 10. 21.
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웹서버와 앱과 서로 연결되어 데이터를 가져오도록.

 

화면 구성

이름 , 메세지 작성하여 GET방식/ POST방식으로 데이터 전송

 

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<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical"
    android:padding="16dp"
    tools:context=".MainActivity">
 
    <EditText
        android:id="@+id/et_name"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:hint="input name"
        android:inputType="text"/>
 
    <EditText
        android:id="@+id/et_msg"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:hint="input message"
        android:inputType="textMultiLine"
        android:maxLines="5"/>
<!--    처음 시작은 한 줄이고 5줄까지만 커지고, 그 다음줄부터 스크롤링됨.-->
    <Button
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:text="GET METHOD"
        android:onClick="clickGet"/>
    <Button
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:text="GET POST"
        android:onClick="clickPost"/>
    <TextView
        android:id="@+id/tv"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:textStyle="bold"
        android:textSize="24sp"
        android:padding="8dp"/>
</LinearLayout>
 
  

네트워크 작업은 퍼미션이 필요하다.

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<?xml version="1.0" encoding="utf-8"?>
    xmlns:tools="http://schemas.android.com/tools"
    package="com.lcw.ex78httprequesttest">
 
    <uses-permission android:name="android.permission.INTERNET"/>
 
 
    <application
        android:allowBackup="true"
        android:icon="@mipmap/ic_launcher"
        android:label="@string/app_name"
        android:roundIcon="@mipmap/ic_launcher_round"
        android:supportsRtl="true"
        android:theme="@style/AppTheme"
        android:usesCleartextTraffic="true">
        <activity android:name=".MainActivity">
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />
 
                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>
    </application>
 
</manifest>
 
  

내 닷홈 주소를 복사한다.
복하한 주소를 파일 탐색기에 넣고, 앞에 http -> ftp로 바꿔준다. 그후 로그인하면 안에 저장된 데이터를 볼 수 있다.
새로 폴더 만들어서 여기에 php 파일을 넣을 것이다.

 

경로에 Android 폴더에 이제 만들 getTest.php로 

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public class MainActivity extends AppCompatActivity {
 
    EditText etName, etMsg;
    TextView tv;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
 
        etName=findViewById(R.id.et_name);
        etMsg=findViewById(R.id.et_msg);
        tv=findViewById(R.id.tv);
    }
 
    public void clickGet(View view) {
 
        //서버에 name, message를 전송하도록
        //네트워크작업은 반드시 별도의 Thread
        new Thread(){
            @Override
            public void run() {
                String name= etName.getText().toString();
                String msg= etMsg.getText().toString();
 
                //Get방식으로 데이터를 보낼 서버주소
                String serverUrl= "http://umul.dothome.co.kr/Android/getTest.php";
 
                //Get 방식은 보낼데이터(name, msg)를 URL 뒤에 붙여서 보내는 방식
                //한글은 인터넷 URL에 사용 불가!! 그래서 한글을 utf-8 인코딩
 
                try {
                    name= URLEncoder.encode(name,"utf-8");
                    msg= URLEncoder.encode(msg,"utf-8");
                } catch (UnsupportedEncodingException e) {
                    e.printStackTrace();
                }
 
                String getUrl=serverUrl+"?name="+name+"&msg="+msg;
 
                //서버와 연결 작업 시작!
                try {
                    URL url= new URL(getUrl);
                    //URL 객체는 데이터를 읽어들이기 위한 InputStream을 여는 것만 가능하고
                    //데이터를 서버로 보낼 수 없다.
                    //즉, OutputStream을 열수는 없음.
 
                    //HTTP 통신 규약에 따라 데이터를 주고 받는 역할을 수행하는 객체 얻어오기
                    HttpURLConnection connection= (HttpURLConnection) url.openConnection();
                    connection.setRequestMethod("GET"); //반드시 대문자!
                    connection.setDoInput(true);
                    connection.setDoOutput(true);
                    connection.setUseCaches(false);
 
                    //보낼 데이터가 있다면 여기서 OutputStream을 통해 전송
                    //Get방식으로 이미 URL에 데이터를 붙여 보냈기에 필요 없음.
 
                    InputStream is= connection.getInputStream();
                    InputStreamReader isr= new InputStreamReader(is); //바이트 스트림을 문자 스트림으로
                    BufferedReader reader= new BufferedReader(isr);
                    
                   final StringBuffer buffer= new StringBuffer();
                    
                    String line= reader.readLine();
                    while (line!=null){
                        buffer.append(line+"\n");
                        line= reader.readLine();
                    }
                    
                    runOnUiThread(new Runnable() {
                        @Override
                        public void run() {
                            tv.setText(buffer.toString());
                        }
                    });
                    
                } catch (MalformedURLException e) { e.printStackTrace();} catch (IOException e) {}
            }//run() ..
        }.start();
    }
 
    public void clickPost(View view) {
    }
}
 
 
  

이제 경로에 미리쓴 getTest.php를 만들자.

 

 

03폴더에 

하고 안드로이드에서 동작을 해보자.

post 방식 코드 작성

 

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public class MainActivity extends AppCompatActivity {
 
    EditText etName, etMsg;
    TextView tv;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        etName=findViewById(R.id.et_name);
        etMsg=findViewById(R.id.et_msg);
        tv=findViewById(R.id.tv);
 
    }
 
    public void clickGet(View view) {
 
        //서버에 name, message를 전송하도록
        //네트워크작업은 반드시 별도의 Thread
        new Thread(){
            @Override
            public void run() {
                String name= etName.getText().toString();
                String msg= etMsg.getText().toString();
 
                //Get방식으로 데이터를 보낼 서버주소
                String serverUrl= "http://umul.dothome.co.kr/Android/getTest.php";
 
                //Get 방식은 보낼데이터(name, msg)를 URL 뒤에 붙여서 보내는 방식
                //한글은 인터넷 URL에 사용 불가!! 그래서 한글을 utf-8 인코딩
 
                try {
                    name= URLEncoder.encode(name,"utf-8");
                    msg= URLEncoder.encode(msg,"utf-8");
                } catch (UnsupportedEncodingException e) {
                    e.printStackTrace();
                }
 
                String getUrl=serverUrl+"?name="+name+"&msg="+msg;
 
                //서버와 연결 작업 시작!
                try {
                    URL url= new URL(getUrl);
                    //URL 객체는 데이터를 읽어들이기 위한 InputStream을 여는 것만 가능하고
                    //데이터를 서버로 보낼 수 없다.
                    //즉, OutputStream을 열수는 없음.
 
                    //HTTP 통신 규약에 따라 데이터를 주고 받는 역할을 수행하는 객체 얻어오기
                    HttpURLConnection connection= (HttpURLConnection) url.openConnection();
                    connection.setRequestMethod("GET"); //반드시 대문자!
                    connection.setDoInput(true);
                    connection.setDoOutput(true);
                    connection.setUseCaches(false);
 
                    //보낼 데이터가 있다면 여기서 OutputStream을 통해 전송
                    //Get방식으로 이미 URL에 데이터를 붙여 보냈기에 필요 없음.
 
                    InputStream is= connection.getInputStream();
                    InputStreamReader isr= new InputStreamReader(is); //바이트 스트림을 문자 스트림으로
                    BufferedReader reader= new BufferedReader(isr);
 
                   final StringBuffer buffer= new StringBuffer();
 
                    String line= reader.readLine();
                    while (line!=null){
                        buffer.append(line+"\n");
                        line= reader.readLine();
                    }
 
                    runOnUiThread(new Runnable() {
                        @Override
                        public void run() {
                            tv.setText(buffer.toString());
                        }
                    });
 
                } catch (MalformedURLException e) { e.printStackTrace();} catch (IOException e) {}
            }//run() ..
        }.start();
    }
 
    public void clickPost(View view) {
 
        new Thread(){
            @Override
            public void run() {
                String name= etName.getText().toString();
                String msg= etMsg.getText().toString();
 
                String serverUrl= "http://umul.dothome.co.kr/Android/postTest.php";
 
                try {
                    URL url= new URL(serverUrl);
 
                    HttpURLConnection connection= (HttpURLConnection) url.openConnection();
                    connection.setRequestMethod("POST");
                    connection.setDoInput(true);
                    connection.setDoOutput(true);
                    connection.setUseCaches(false);
 
                    //보낼 데이터
                    String query= "name="+ name + "&msg=" + msg;
 
                    OutputStream os = connection.getOutputStream();
                    OutputStreamWriter writer= new OutputStreamWriter(os);
 
                    writer.write(query, 0, query.length());
                    writer.flush();
                    writer.close();
 
                    //postTest.php로부터 echo결과 받기
                    InputStream is = connection.getInputStream();
                    InputStreamReader isr = new InputStreamReader(is);
                    BufferedReader reader= new BufferedReader(isr);
 
                    final StringBuffer buffer= new StringBuffer();
                    String line= reader.readLine();
                    while (line != null){
                        buffer.append(line+"\n");
                        line=reader.readLine();
                    }
 
                    runOnUiThread(new Runnable() {
                        @Override
                        public void run() {
                            tv.setText(buffer.toString());
                        }
                    });
 
                } catch (MalformedURLException e) {e.printStackTrace();} catch (IOException e) {e.printStackTrace();}
 
            }
        }.start();
    }
}
 
  

하고 실행 시키자.

<최종 실행 화면>

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