안드로이드 후잉 API 호출 JAVA 코드 예제

MainActivity.java

package com.example.android;

import android.os.AsyncTask;
import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.OutputStream;
import java.net.HttpURLConnection;
import java.net.URL;


public class MainActivity extends AppCompatActivity {

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

    /**
     * 메인 스레드
     */
    @Override
    protected void onResume() {
        super.onResume();

        // GET/DELETE 스레드 생성
        new GET_DELETE().execute();
        // POST/PUT 스레드 생성
        new POST_PUT().execute();
    }

    /**
     * GET/DELETE 스레드 정의
     */
    private class GET_DELETE extends AsyncTask<Void, Void, String> {

        @Override
        protected String doInBackground(Void... params) {
            String results = null;
            try {
                // 메소드, 리소스, 파라미터, X-API-KEY 입력
                String method = "GET";
                String resource = "https://whooing.com/api/entries.json_array";
                String parameters = "section_id=s12345&start_date=20160101&end_date=20161231";
                String X_API_KEY = "app_id=123,token=1q2w3e4r5t,signiture=1q2w3e4r5t,timestamp=" + System.currentTimeMillis();

                // API 호출
                URL url = new URL(resource + "?" + parameters);
                HttpURLConnection httpURLConnection = (HttpURLConnection) url.openConnection();
                httpURLConnection.setRequestMethod(method);
                httpURLConnection.setRequestProperty("X-API-KEY", X_API_KEY);
                InputStream inputStream = httpURLConnection.getInputStream();
                BufferedReader bufferedReader = new BufferedReader(new InputStreamReader(inputStream));
                results = bufferedReader.readLine();
                inputStream.close();
                bufferedReader.close();
                httpURLConnection.disconnect();
            } catch (IOException e) {
                e.printStackTrace();
            }
            return results;
        }

        /**
         * API 응답 결과로 수행할 작업 코드를 작성합니다.
         *
         * @param results = API 응답 결과
         *                example: {"code":200,~,"results":{~}}
         */
        @Override
        protected void onPostExecute(String results) {
            super.onPostExecute(results);
            // 작업 코드
        }
    }


    /**
     * POST/PUT 스레드 정의
     */
    private class POST_PUT extends AsyncTask<Void, Void, String> {
        @Override
        protected String doInBackground(Void... params) {
            String results = null;
            try {
                // 메소드, 리소스, 파라미터, X-API-KEY 입력
                String method = "POST";
                String resource = "https://whooing.com/api/entries.json_array";
                String parameters = "section_id=s12345&l_account=expenses&l_account_id=x12&r_account=assets&r_account_id=x123&money=12345";
                String X_API_KEY = "app_id=123,token=1q2w3e4r5t,signiture=1q2w3e4r5t,timestamp=" + System.currentTimeMillis();

                // API 호출
                URL url = new URL(resource);
                HttpURLConnection httpURLConnection = (HttpURLConnection) url.openConnection();
                httpURLConnection.setRequestMethod(method);
                httpURLConnection.setRequestProperty("X-API-KEY", X_API_KEY);
                httpURLConnection.setDoOutput(true);
                OutputStream outputStream = httpURLConnection.getOutputStream();
                outputStream.write(parameters.getBytes());
                outputStream.flush();
                outputStream.close();
                InputStream inputStream = httpURLConnection.getInputStream();
                BufferedReader bufferedReader = new BufferedReader(new InputStreamReader(inputStream));
                results = bufferedReader.readLine();
                inputStream.close();
                bufferedReader.close();
                httpURLConnection.disconnect();
            } catch (IOException e) {
                e.printStackTrace();
            }
            return results;
        }

        /**
         * API 응답 결과로 수행할 작업 코드를 작성합니다.
         *
         * @param results = API 응답 결과
         *                example: {"code":200,~,"results":{~}}
         */
        @Override
        protected void onPostExecute(String results) {
            super.onPostExecute(results);
            // 작업 코드
        }
    }
}