com.gmail.at.faint545.tasks.HistoryDownloadTask.java Source code

Introduction

Here is the source code for com.gmail.at.faint545.tasks.HistoryDownloadTask.java

Source

/* 
 * Copyright 2011 Alex Fu
 * 
 * Licensed 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.gmail.at.faint545.tasks;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.util.ArrayList;
import org.apache.http.HttpResponse;
import org.apache.http.NameValuePair;
import org.apache.http.client.ClientProtocolException;
import org.apache.http.client.HttpClient;
import org.apache.http.client.entity.UrlEncodedFormEntity;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.impl.client.DefaultHttpClient;
import org.apache.http.message.BasicNameValuePair;
import android.os.AsyncTask;
import android.support.v4.app.Fragment;

import com.gmail.at.faint545.SabnzbdConstants;
import com.handmark.pulltorefresh.library.PullToRefreshListView;

public class HistoryDownloadTask extends AsyncTask<Void, Void, String> {
    private Fragment mContext;
    private String url;
    private String api;
    private PullToRefreshListView pullToRefresh;

    public interface HistoryDownloadTaskListener {
        public void onHistoryDownloadFinished(String result);
    }

    public HistoryDownloadTask(Fragment context, String url, String api, PullToRefreshListView usePTR) {
        mContext = context;
        this.url = url;
        this.api = api;
        pullToRefresh = usePTR;
    }

    @Override
    protected String doInBackground(Void... params) {
        HttpClient client = new DefaultHttpClient();
        HttpPost request = new HttpPost(url);

        ArrayList<NameValuePair> arguments = new ArrayList<NameValuePair>();
        arguments.add(new BasicNameValuePair(SabnzbdConstants.APIKEY, api));
        arguments.add(new BasicNameValuePair(SabnzbdConstants.OUTPUT, SabnzbdConstants.OUTPUT_JSON));
        arguments.add(new BasicNameValuePair(SabnzbdConstants.MODE, SabnzbdConstants.MODE_HISTORY));

        try {
            request.setEntity(new UrlEncodedFormEntity(arguments));
            HttpResponse result = client.execute(request);
            InputStream inStream = result.getEntity().getContent();
            BufferedReader br = new BufferedReader(new InputStreamReader(inStream), 8);
            StringBuilder jsonStringBuilder = new StringBuilder();
            String line;
            while ((line = br.readLine()) != null) {
                if (line.length() > 0) {
                    jsonStringBuilder.append(line);
                }
            }
            br.close();
            inStream.close();
            return jsonStringBuilder.toString();
        } catch (ClientProtocolException e) {
            return ClientProtocolException.class.getName();
        } catch (IOException e) {
            return IOException.class.getName();
        }
    }

    @Override
    protected void onPostExecute(String result) {
        HistoryDownloadTaskListener listener = (HistoryDownloadTaskListener) mContext;
        listener.onHistoryDownloadFinished(result);
        cleanup();
        super.onPostExecute(result);
    }

    private void cleanup() {
        if (pullToRefresh instanceof PullToRefreshListView) {
            ((PullToRefreshListView) pullToRefresh).onRefreshComplete();
        }

        pullToRefresh = null;
        mContext = null;
        url = null;
        api = null;
    }
}