에이치의 모바일 앱 개발

/**
 * Created by lsh on 2016-06-29.
 * version 1.0.1
 */
public class DBFileDownload extends AsyncTask<Void, Void, String> {
    private Context context;
    private String serverPath, localFolderPath, localFilePath;
    private int version;

    public DBFileDownload(Context context, int version, String serverPath, String localFolderPath, String localFilePath) {
        this.context = context;
        this.version = version;
        this.serverPath = serverPath;
        this.localFolderPath = localFolderPath;
        this.localFilePath = localFilePath;
    }

    private long fileSizeCheck() {
        long fileSize = 0;
        return fileSize;
    }

    /**
     * 다운로드시 버전 정보와 파일 크기를 비교하여 이어받기 동작이 가능하게 한다.
     *
     * @param params
     * @return
     */
    protected String doInBackground(Void... params) {
        String zipName = null;
        long localFileSize, remainingFileSize, totalFileSize;
        int Read;

        File folder = new File(localFolderPath);
        try {
            if (!folder.exists()) {
                folder.mkdirs();
            }

            URL mUrl = new URL(serverPath);
            HttpURLConnection conn = (HttpURLConnection) mUrl.openConnection();
            conn.setConnectTimeout(5000);
            conn.setReadTimeout(5000);


            int len = conn.getContentLength();
            byte[] tmpByte = new byte[len];
            InputStream is = conn.getInputStream();
            File file = new File(localFilePath);
            FileOutputStream fos = new FileOutputStream(file);
            for (; ; ) {
                Read = is.read(tmpByte);
                if (Read <= 0) {
                    break;
                }
                fos.write(tmpByte, 0, Read);
            }
            is.close();
            fos.close();
            conn.disconnect();

            zipName = file.getName();
        } catch (MalformedURLException e) {
            zipName = null;
            Log.e("Error", "MalformedURLException");
        } catch (SocketTimeoutException e) {
            zipName = null;
            Log.e("Error", "MalformedURLException");
        } catch (IOException e) {
            zipName = null;
            Log.e("Error", "IOException");
            e.printStackTrace();
        }
        return zipName;
    }

    protected void onPostExecute(String fileName) {
        if (fileName != null) {
            Log.e("Download", "success");
            new DBunzip(context, version, localFilePath, localFolderPath).execute();
        } else {
            Log.e("Download", "fail");
            IntroActivity.AppFinish(context);
        }
    }

    public static boolean fileExists(String localFolderPath, String localFileName) {
        boolean file_flag = false;
        File[] listFiles = (new File(localFolderPath).listFiles());
        for (File file : listFiles) {
            if (file.getName().equals(localFileName)) {
                file_flag = true;
            }
        }
        return file_flag;
    }
}