VKImageOperation.java

//
//  Copyright (c) 2014 VK.com
//
//  Permission is hereby granted, free of charge, to any person obtaining a copy of
//  this software and associated documentation files (the "Software"), to deal in
//  the Software without restriction, including without limitation the rights to
//  use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
//  the Software, and to permit persons to whom the Software is furnished to do so,
//  subject to the following conditions:
//
//  The above copyright notice and this permission notice shall be included in all
//  copies or substantial portions of the Software.
//
//  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
//  IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
//  FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
//  COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
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//  CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
//

package com.vk.sdk.api.httpClient;

import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.os.Handler;
import android.os.Looper;

public class VKImageOperation extends VKHttpOperation<Bitmap> {

    public float imageDensity;

    /**
     * Create new operation for loading prepared Http request.
     *
     * @param imageUrl URL for image
     */
    public VKImageOperation(String imageUrl) {
        super(new VKHttpClient.VKHTTPRequest(imageUrl));
    }

    @Override
    public Bitmap getResultObject() {
        byte[] response = getResponseData();
        Bitmap image = BitmapFactory.decodeByteArray(response, 0, response.length);
        if (imageDensity > 0) {
            image = Bitmap.createScaledBitmap(image, (int) (image.getWidth() * imageDensity), (int) (image.getHeight() * imageDensity), true);
        }
        return image;

    }

    /**
     * Set listener for current operation
     *
     * @param listener Listener subclasses VKHTTPOperationCompleteListener
     */
    public void setImageOperationListener(final VKImageOperationListener listener) {
        this.setCompleteListener(new VKOperationCompleteListener() {
            @Override
            public void onComplete() {
                if (VKImageOperation.this.state() != VKOperationState.Finished || mLastException != null) {
                    listener.onError(VKImageOperation.this, generateError(mLastException));
                } else {
                    final Bitmap result = getResultObject();
                    new Handler(Looper.getMainLooper()).post(new Runnable() {
                        @Override
                        public void run() {
                            listener.onComplete(VKImageOperation.this, result);
                        }
                    });
                }
            }
        });
    }

    /**
     * Class representing operation listener for VKHttpOperation
     */
    public static abstract class VKImageOperationListener extends VKAbstractCompleteListener<VKImageOperation, Bitmap> {
    }
}