[Android] AsyncTask 예제

모바일 융합 기술 센터

스마트 앱 창작터 안드로이드 기초 및 실습

 

Day9Ex1 앞부분 구현 내용 (내용 추가 필요)

 

package kr.re.mctc.android.day9ex1weatherinfo;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;

import org.apache.http.HttpResponse;
import org.apache.http.client.ClientProtocolException;
import org.apache.http.client.HttpClient;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.impl.client.DefaultHttpClient;

import android.os.AsyncTask;
import android.os.Bundle;
import android.support.v7.app.ActionBarActivity;
import android.view.Window;
import android.widget.Toast;

public class MainActivity extends ActionBarActivity {

 String mResult = null;
 WeatherTask mTask = null;
 
 @Override
 protected void onCreate(Bundle savedInstanceState) {
  super.onCreate(savedInstanceState);
  
  // setContentView() 앞에서 호출
  requestWindowFeature(Window.FEATURE_INDETERMINATE_PROGRESS);

  setContentView(R.layout.activity_main);
  
  mTask = new WeatherTask();
  mTask.execute();
 }

 class WeatherTask extends AsyncTask<Void, Void, String> {
  @Override
  protected void onPreExecute() {
   super.onPreExecute();
   setProgressBarIndeterminate(true);
  }

  @Override
  protected String doInBackground(Void... params) {
   String query = "http://api.openweathermap.org/data/2.5/weather?q=kumi";
   BufferedReader rd = null;
   String rLine = "";
   StringBuilder result = new StringBuilder();
   
   HttpClient httpClient = new DefaultHttpClient();
   HttpGet httpGet = new HttpGet(query);
   try {
    HttpResponse response = httpClient.execute(httpGet);
   
    rd = new BufferedReader(new InputStreamReader(
       response.getEntity().getContent()));
    while ((rLine = rd.readLine()) != null) {
     result.append(rLine);
    }
    return result.toString();
   } catch (ClientProtocolException e) {
    e.printStackTrace();
   } catch (IOException e) {
    e.printStackTrace();
   }
   return null;
  }
  
  @Override
  protected void onPostExecute(String result) {
   super.onPostExecute(result);
   setProgressBarIndeterminate(false);
   
   Toast.makeText(MainActivity.this,
     result, Toast.LENGTH_SHORT).show();
   
   mResult = result;
  }  
 }
}