ca.marcmeszaros.papyrus.remote.DownloadThumbnails.java Source code

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Here is the source code for ca.marcmeszaros.papyrus.remote.DownloadThumbnails.java

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/**
 * Copyright 2011 Marc Meszaros
 *
 * 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 ca.marcmeszaros.papyrus.remote;

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

import org.apache.http.HttpEntity;
import org.apache.http.HttpResponse;
import org.apache.http.client.ClientProtocolException;
import org.apache.http.client.HttpClient;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.entity.BufferedHttpEntity;
import org.apache.http.impl.client.DefaultHttpClient;

import java.io.IOException;
import java.io.InputStream;
import java.net.URISyntaxException;
import java.net.URL;
import java.util.LinkedList;

public class DownloadThumbnails extends AsyncTask<URL, Void, LinkedList<Bitmap>> {

    private static final String TAG = "DownloadThumbnails";

    @Override
    protected LinkedList<Bitmap> doInBackground(URL... urls) {

        // some class variables
        HttpGet httpRequest;
        Bitmap bm;
        LinkedList<Bitmap> bitmaps = new LinkedList<Bitmap>();

        try {

            // loop through all urls
            for (URL url : urls) {
                // create the HTTP request
                httpRequest = new HttpGet(url.toURI());

                // create an HTTP client and get the response
                HttpClient httpclient = new DefaultHttpClient();
                HttpResponse response = (HttpResponse) httpclient.execute(httpRequest);

                // get a handle on the http entity
                HttpEntity entity = response.getEntity();
                BufferedHttpEntity bufHttpEntity = new BufferedHttpEntity(entity);
                InputStream instream = bufHttpEntity.getContent();

                // read the entity from the stream into a bitmap object
                bm = BitmapFactory.decodeStream(instream);

                // add the bitmap to the list
                bitmaps.add(bm);

            }

        } catch (URISyntaxException e) {
            Log.e(TAG, "URISyntaxException", e);
        } catch (ClientProtocolException e) {
            Log.e(TAG, "ClientProtocolException", e);
        } catch (IOException e) {
            Log.e(TAG, "IOException", e);
        }

        return bitmaps;
    }

}