Android Open Source - Grocery-Mate Download Async Task

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Back to project page Grocery-Mate.

License

The source code is released under:

Apache License

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Java Source Code

/*
* Copyright (C) 2011 iMellon/* w w w . j a va2s  .  co m*/
*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing,
* software distributed under the License is distributed on an
* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
* KIND, either express or implied. See the License for the
* specific language governing permissions and limitations
* under the License.
*/

package com.imellon.android.grocerymate.io;

import java.io.IOException;
import java.net.UnknownHostException;
import com.imellon.android.grocerymate.util.HttpManager;
import com.imellon.android.grocerymate.util.UserTask;

/**
* @author Christos Papazafeiropoulos, Dimitris Makris
*/

public class DownloadAsyncTask extends UserTask<String, Integer, String> {

  public enum COM_ERROR {
    UnknownHostException, MalformedUrl, UnknownError, NoError
  }
  
  private COM_ERROR error = COM_ERROR.NoError;
  private String errorReason;

  private String[] returnedParameters = null;

  private DownloadAsyncTaskIface iFace = null;

  private static final String TAG = DownloadAsyncTask.class.getSimpleName();

  public DownloadAsyncTask(DownloadAsyncTaskIface iface) {
    iFace = iface;
  }

  public DownloadAsyncTask(DownloadAsyncTaskIface iface,
      String... returnParams) {
    iFace = iface;
  }

  @Override
  public void onPreExecute() {
    iFace.onTaskStart();
  }

  @Override
  public String doInBackground(String... urls) {
    returnedParameters = urls;
    String str = null;
    try {
      str = HttpManager.convertInputStreamToString(HttpManager.downloadFromUrl(urls[0]));
      error = COM_ERROR.NoError;
    } catch (UnknownHostException uhe) {
      error = COM_ERROR.UnknownHostException;
      errorReason = "Communication Error";
    } catch (IOException ioe) {
      error = COM_ERROR.MalformedUrl;
      errorReason = "Communication Error";
    } catch (Exception e) {
      error = COM_ERROR.UnknownError;
      e.printStackTrace();
      errorReason = "Communication Error";
    }

    return str;
  }

  @Override
  public void onPostExecute(String result) {
    if (error.equals(COM_ERROR.NoError))
      iFace.onTaskFinished(result, returnedParameters);
    else
      iFace.onErrorOccured(error, errorReason);
  }

}

Java Source Code List