Retrofit 간단한 Post로 서버에 데이터 보내기

first_name 과 last_name을 안드로이드로 부터 값을 받는 예제

1.스프링부트 서버 코딩

@RestController
@RequestMapping("/api/")
public class ApiControll {

    private static final Logger logger = LoggerFactory.getLogger(ApiControll.class);

    @RequestMapping(value= "expost",method= RequestMethod.POST)
    public Message TestPost(HttpServletRequest request)  {

        Message m = new Message();

        try{

            m.setMsg("정상적으로 서버에서 값을 받음");
            String first_name = request.getParameter("first_name");
            String last_name = request.getParameter("last_name");
            logger.info("첫번째 이름 : "+ first_name);
            logger.info("두번째 이름 : "+ last_name);
            return m;

        }catch (Exception e){

            m.setMsg("서버에서 값을 받는 도중 문제가 생겼습니다");
            e.printStackTrace();
            return m;
        }
    }

    class Message{
        String msg;

        Message(){}

        public Message(String msg) {
            this.msg = msg;
        }

        public String getMsg() {
            return msg;
        }

        public void setMsg(String msg) {
            this.msg = msg;
        }
    }

2. 안드로이드 XML
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:orientation="vertical"
    android:layout_width="match_parent"
    android:layout_height="match_parent">

    <EditText
        android:id="@+id/first_name"
        android:hint="first_name"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentTop="true"
        android:layout_alignLeft="@+id/last_name"
        android:layout_alignStart="@+id/last_name"
        android:layout_alignRight="@+id/last_name"
        android:layout_alignEnd="@+id/last_name" />

    <EditText
        android:id="@+id/last_name"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:ems="10"
        android:layout_below="@+id/first_name"
        android:hint="last_name"
        android:layout_centerHorizontal="true" />

    <Button
        android:id="@+id/btn_send"
        android:text="서버로 전송"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_below="@+id/last_name"
        android:layout_centerHorizontal="true" />


</RelativeLayout>

3.Activity 코딩

public class PostActivity extends Activity{

    public static String SERVER_ADRESS = "http://192.168.1.101:8080";

    EditText first;
    EditText last;
    Button  btnSend;

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

        first = (EditText) findViewById(R.id.first_name);
        last = (EditText) findViewById(R.id.last_name);
        Button btnSend = (Button) findViewById(R.id.btn_send);

        btnSend.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {

                String firstName = first.getText().toString();
                String lastName = last.getText().toString();

                final Call<Message> m = PostActivity.RetrofitServiceImplFactory.serverPost().sendName(firstName,lastName);

                m.enqueue(new Callback<Message>() {
                    @Override
                    public void onResponse(Response<Message> response, Retrofit retrofit) {
                        final  Message message = response.body();
                        Toast.makeText(getApplicationContext(), "서버에 값을 전달했습니다 : " + message.getMsg(), Toast.LENGTH_SHORT).show();
                    }

                    @Override
                    public void onFailure(Throwable t) {
                        t.printStackTrace();
                        Toast.makeText(getApplicationContext(), "서버와 통신중 에러가 발생했습니다", Toast.LENGTH_SHORT).show();
                    }
                });
            }
        });
    }
    public interface ServerPost{
        @FormUrlEncoded
        @POST("/api/expost")
        Call<Message> sendName(@Field("first_name") String first, @Field("last_name") String last);
    }

    static class RetrofitServiceImplFactory{
        private static Retrofit getretrofit(){
            return new Retrofit.Builder()
                    .baseUrl(SERVER_ADRESS)
                    .addConverterFactory(GsonConverterFactory.create()).build();
        }

        public static ServerPost serverPost(){
            return getretrofit().create(ServerPost.class);
        }
    }
}