Android HttpRequest 이미지 다운로드

Question

나는 앱이 아니라 오류가 발생합니다. 아무것도하지 마라. 기본 다운로드 예제 코드는 다음과 같이해야한다 http://www.helloandroid.com/tutorials/how-download-fileimage-url-your-device

package com.androidhive.httprequests; 

import java.io.IOException; 
import java.net.URL; 

import android.util.Log; 

import com.androidhive.httprequests.AndroidHTTPRequestsActivity; 

public class DownloadFromUrl { 

public static void main() 
{ 
    try { 
    AndroidHTTPRequestsActivity hallo = new AndroidHTTPRequestsActivity(); 
    String imageURL2 = "sample.jpg"; 
    URL url = new URL("http://api.androidhive.info/images/" + imageURL2); 
    String filename2 = String.valueOf(url.hashCode()); 
    hallo.DownloadFromUrl(imageURL2, filename2); 
    } catch (IOException e) { 
     Log.d("ImageManager", "Error: " + e); 
} 
} 

Answer 1

다운로더에 대한

는

링크 :

private class DownloadWallpaperTask extends AsyncTask<String, Integer, String> { 

    @Override 
    protected String doInBackground(String... params) { 
     // TODO Auto-generated method stub 
     String wallpaperURLStr = params[0]; 
     String localPath = Integer.toString(wallpaperURLStr.hashCode()); 
     try { 
      URL wallpaperURL = new URL(wallpaperURLStr); 
      URLConnection connection = wallpaperURL.openConnection(); 

      //get file length 
      int filesize = connection.getContentLength(); 
      if(filesize < 0) { 
       downloadProgressDialog.setMax(1000000); 
      } else { 
       downloadProgressDialog.setMax(filesize); 
      } 

      InputStream inputStream = new BufferedInputStream(wallpaperURL.openStream(), 10240); 
      String appName = getResources().getString(R.string.app_name); 
      OutputStream outputStream = openFileOutput(localPath, Context.MODE_PRIVATE); 
      byte buffer[] = new byte[1024]; 
      int dataSize; 
      int loadedSize = 0; 
      while ((dataSize = inputStream.read(buffer)) != -1) { 
       loadedSize += dataSize; 
       publishProgress(loadedSize); 
       outputStream.write(buffer, 0, dataSize); 
      } 
     } catch (MalformedURLException e) { 
      e.printStackTrace(); 
     } catch (IOException e) { 
      // TODO Auto-generated catch block 
      e.printStackTrace(); 
     } 

     return localPath; 
    } 


    protected void onProgressUpdate(Integer... progress) { 
     downloadProgressDialog.setProgress(progress[0]); 
    } 

    protected void onPostExecute(String result) { 
     downloadProgressDialog.hide(); 

     //open preview activity 
     Bundle postInfo = new Bundle(); 
     postInfo.putString("localpath", result); 

     if (previewPanelIntent == null) { 
      previewPanelIntent = new Intent(MainActivity.this, 
        PreviewPanel.class); 
     } 

     previewPanelIntent.putExtras(postInfo); 
     startActivity(previewPanelIntent); 
    } 
} 

더 자세한 정보를 얻으려면, 내가에 사용하고 하나 개의 안드로이드 응용 프로그램의 소스 코드가 내 앱 :

Android Download Image with Progress Bar