Android Open Source - ean-android Image Drawable Loader Task

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Copyright (c) 2013, Expedia Affiliate Network All rights reserved. Redistribution and use in source and binary forms, with or without modification, are permitted provided that redistributions of sour...

Java Source Code

/*
 * Copyright (c) 2013, Expedia Affiliate Network
 * All rights reserved./* www  .ja v a2s . co  m*/
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that redistributions of source code
 * retain the above copyright notice, these conditions, and the following
 * disclaimer. 
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR
 * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 *
 * The views and conclusions contained in the software and documentation are those
 * of the authors and should not be interpreted as representing official policies, 
 * either expressed or implied, of the Expedia Affiliate Network or Expedia Inc.
 */

package com.ean.mobile.task;

import java.io.IOException;

import android.graphics.drawable.Drawable;
import android.os.AsyncTask;
import android.util.Log;
import android.widget.ImageView;

import com.ean.mobile.app.HotelImageDrawable;
import com.ean.mobile.app.SampleConstants;

/**
 * A task that will load one of the images represented in a {@link HotelImageDrawable} (as specified by loadMain)
 * into the passed {@link ImageView}.
 */
public final class ImageDrawableLoaderTask extends AsyncTask<HotelImageDrawable, Integer, Drawable> {

    private final ImageView view;

    private final boolean loadMain;

    /**
     * Determines which image to load and into what ImageView.
     * @param view The view to load the image into.
     * @param loadMain True to load {@link HotelImageDrawable#main}, false to load {@link HotelImageDrawable#thumbnail}.
     */
    public ImageDrawableLoaderTask(final ImageView view, final boolean loadMain) {
        super();
        this.view = view;
        this.loadMain = loadMain;
    }

    /**
     * Assumes that hotelImageTuples is of size 1, and loads the appropriate image from the network connection.
     * {@inheritDoc}
     */
    @Override
    protected Drawable doInBackground(final HotelImageDrawable... hotelImageTuples) {
        try {
            return loadMain ? hotelImageTuples[0].loadMainImage() : hotelImageTuples[0].loadThumbnailImage();
        } catch (IOException ioe) {
            Log.d(SampleConstants.LOG_TAG, "An error occurred when loading hotel's main thumbnail", ioe);
        }
        return null;
    }

    /**
     * Sets the drawable image in the {@link ImageView} passed during construction to that loaded during
     * {@link ImageDrawableLoaderTask#doInBackground(com.ean.mobile.app.HotelImageDrawable...)}.
     * {@inheritDoc}
     */
    @Override
    protected void onPostExecute(final Drawable drawable) {
        view.setImageDrawable(drawable);
    }

}

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