Neo's Programming

서버상에서 이미지를 읽어와서 이미지 뷰에 보이고 또한 다운로드 받는 예제이다.

다운받은 파일은 DDMS 상에서 확인이 가능하다.

public class ImageViewActivity extends Activity{ 
 ImageView m_imgview;
 public void onCreate(Bundle savedInstanceState){
  super.onCreate(savedInstanceState);  
  setContentView(R.layout.main);
  m_imgview = (ImageView)findViewById(R.id.img);
  Button draw_btn = (Button)findViewById(R.id.draw);
  draw_btn.setOnClickListener(new Button.OnClickListener(){
   public void onClick(View v){
    String imgurl="파일경로";
    {
     InputStream is;
     try {
      is = new URL(imgurl).openStream();
      Bitmap bmp = BitmapFactory.decodeStream(is);
      m_imgview.setImageBitmap(bmp);
      is.close();
     } catch (MalformedURLException e) {
      // TODO Auto-generated catch block
      e.printStackTrace();
     } catch (IOException e) {
      // TODO Auto-generated catch block
      e.printStackTrace();
     }
    }
   }
  });
  
  Button down_btn = (Button)findViewById(R.id.down);
  down_btn.setOnClickListener(new Button.OnClickListener(){
   public void onClick(View v){
    String imgurl="파일경로";    
    int index = imgurl.lastIndexOf('/');
    String localimg = imgurl.substring(index+1);
    String path = Environment.getDataDirectory().getAbsolutePath();
    path += "/data/imageview.test/"+localimg;
    if(new File(path).exists()==false){
     DownLoadImage(imgurl,localimg);
    }
    Bitmap bitmap = BitmapFactory.decodeFile(path);
    m_imgview.setImageBitmap(bitmap);
   }
  });
 }
 
 boolean DownLoadImage(String url, String filename){
  URL imgurl;
  int read;
  try{
   imgurl = new URL(url);
   HttpURLConnection connect = (HttpURLConnection)imgurl.openConnection();
   int length = connect.getContentLength();
   byte[] data = new byte[length];
   InputStream is = connect.getInputStream();
   FileOutputStream fos = openFileOutput(filename,0);
   
   for(;;){
    read = is.read(data);
    if(read<=0) break;
    fos.write(data,0,read);
   }
   is.close();
   fos.close();
   connect.disconnect();
  }
  catch(Exception ex){return false;}
  return true;
 }
}