Android Open Source - OpenCmsMobile-AndroidApp Download Manager

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Back to project page OpenCmsMobile-AndroidApp.

License

The source code is released under:

GNU Lesser General Public License

Java Source Code

package cz.nelasoft.opencms.mobile;
//www .  j  a v a  2 s  .  c o  m
import java.io.BufferedInputStream;
import java.io.BufferedReader;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.net.HttpURLConnection;
import java.net.URL;
import java.net.URLEncoder;
import java.util.HashMap;
import java.util.Locale;
import java.util.Map;

import org.apache.http.HttpEntity;
import org.apache.http.HttpResponse;
import org.apache.http.client.HttpClient;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.impl.client.DefaultHttpClient;
import org.json.JSONObject;

import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.os.AsyncTask;

public class DownloadManager {

  private static Map<String, String> cache = new HashMap<String, String>();

  public DownloadManager() {
    super();
  }

  public static JSONObject getMenuContent() {
    return null;
  }

  /**
   * 
   * @param url
   * @return
   */
  public static String connect(String menuId) {

    try {

      if (isContentCached(menuId)) {
        return getContent(menuId);
      }

      String url = Config.getConfigUrl() + "?menuId=" + URLEncoder.encode(menuId, "utf-8") + "&lang=" + Locale.getDefault().getLanguage();

      HttpClient httpclient = new DefaultHttpClient();
      HttpGet httpget = new HttpGet(url);
      HttpResponse response;

      response = httpclient.execute(httpget);

      HttpEntity entity = response.getEntity();
      if (entity != null) {
        InputStream is = new BufferedInputStream(entity.getContent());
        BufferedReader reader = new BufferedReader(new InputStreamReader(is));
        StringBuilder sb = new StringBuilder();
        String line = null;
        try {
          while ((line = reader.readLine()) != null) {
            sb.append(line + "\n");
          }
        } catch (IOException e) {
          e.printStackTrace();
        } finally {
          try {
            is.close();
          } catch (IOException e) {
            e.printStackTrace();
          }
        }
        return sb.toString();
      }
    } catch (Exception e) {
    }
    return null;
  }

  public Bitmap bitmapFromUrl(String url) throws IOException {
    Bitmap x;

    BitmapFactory.Options opt = new BitmapFactory.Options();
    // opt.inSampleSize = 2;
    HttpURLConnection connection = (HttpURLConnection) new URL(url).openConnection();
    connection.connect();
    InputStream input = connection.getInputStream();

    x = BitmapFactory.decodeStream(input, null, opt);
    return x;
  }

  public Bitmap connectBitmap(String url) {
    HttpClient httpclient = new DefaultHttpClient();
    HttpGet httpget = new HttpGet(url);
    HttpResponse response;
    try {
      response = httpclient.execute(httpget);
      HttpEntity entity = response.getEntity();
      if (entity != null) {
        InputStream instream = entity.getContent();
        Bitmap result = BitmapFactory.decodeStream(instream);
        instream.close();
        return result;
      }
    } catch (Exception e) {
      e.printStackTrace();
    }
    return null;
  }

  public static abstract class DownloadJsonTask extends AsyncTask<String, Integer, String> {

    public DownloadJsonTask() {
      super();
    }

    protected String doInBackground(String... urls) {
      HttpClient httpclient = new DefaultHttpClient();
      HttpGet httpget = new HttpGet(urls[0]);
      HttpResponse response;
      String result = null;
      try {
        response = httpclient.execute(httpget);

        HttpEntity entity = response.getEntity();
        if (entity != null) {
          long length = entity.getContentLength();
          InputStream is = new BufferedInputStream(entity.getContent());
          try {

            ByteArrayOutputStream baos = new ByteArrayOutputStream();

            byte data[] = new byte[1024];
            long total = 0;
            int count;
            while ((count = is.read(data)) != -1) {
              total += count;
              // publishing the progress....
              publishProgress((int) (total * 100 / length));
              baos.write(data, 0, count);
            }

            result = new String(baos.toByteArray(), "UTF-8");
            return result;
          } finally {
            try {
              is.close();
            } catch (IOException e) {
              e.printStackTrace();
            }
          }
        }
      } catch (Throwable e) {
        e.printStackTrace();
      }
      return result;
    }
  }

  public static String getContent(String key) {
    return cache.get(key);
  }

  public static void setContent(String key, String value) {
    cache.put(key, value);
  }

  public static void cleanCache() {
    cache.clear();
  }

  public static void cleanCache(String key) {
    cache.remove(key);
  }

  public static boolean isContentCached(String key) {
    return cache.containsKey(key);
  }

}

Java Source Code List

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