DownloadFile using AsyncTask

android-AsyncTask-DownloadFile

new DownloadFile().execute("");

private class DownloadFile extends AsyncTask<String, Void, String> {
		protected String doInBackground(String... params) {
			
			InputStream input = null;
	        OutputStream output = null;
	        HttpURLConnection connection = null;
	        
	        try {
	            URL url = new URL("http://ftp.ee.debian.org/debian/ls-lR.gz");
	            connection = (HttpURLConnection) url.openConnection();
	            connection.setConnectTimeout(10000);
	            connection.setReadTimeout(10000);
	            connection.connect();

	            if (connection.getResponseCode() != HttpURLConnection.HTTP_OK) {
	                return "Server returned HTTP " + connection.getResponseCode()
	                        + " " + connection.getResponseMessage();
	            }

	            // int fileLength = connection.getContentLength();

	            input = connection.getInputStream();
	            output = new FileOutputStream("/sdcard/file.zip");
	            final byte buffer[] = new byte[16 * 1024];

	            final InputStream inputStream = connection.getInputStream();

	            int len1 = 0;
	            while ((len1 = inputStream.read(buffer)) > 0) {
	            	Log.i("DPR", "doInBackground - downloading file");
	            	output.write(buffer, 0, len1);
	            }
	        } catch (Exception e) {
	        	Log.i("DPR", "doInBackground - exception" + e.getMessage());
	            return e.toString();
	        } finally {
	            try {
	                if (output != null)
	                    output.close();
	                if (input != null)
	                    input.close();
	                connection.disconnect();
	            } catch (IOException ignored) {
	            }

	            if (connection != null)
	                connection.disconnect();
	        }
			
            return null;
        }

        protected void onPostExecute(String result) {
        }

        protected void onPreExecute() {
        }
							
	}