ca.cs.ualberta.localpost.controller.BitmapJsonConverter.java Source code

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Here is the source code for ca.cs.ualberta.localpost.controller.BitmapJsonConverter.java

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/**
 * The MIT License (MIT)
 * Copyright (c) 2014 Timotei Albu, David Chau-Tran, Alain Clark, Shawn Anderson, Mickael Zerihoun
 * 
 * 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
 *  IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
 *  CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 *  
 */

package ca.cs.ualberta.localpost.controller;

import java.io.ByteArrayOutputStream;
import java.lang.reflect.Type;

import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.util.Base64;

import com.google.gson.JsonDeserializationContext;
import com.google.gson.JsonDeserializer;
import com.google.gson.JsonElement;
import com.google.gson.JsonParseException;
import com.google.gson.JsonPrimitive;
import com.google.gson.JsonSerializationContext;
import com.google.gson.JsonSerializer;

/**
 * Provides custom base64 serialization / deserialization for Bitmaps.
 * Algorithm taken from: http://stackoverflow.com/questions/9224056/android-bitmap-to-base64-string
 * @author zjullion
 */
public class BitmapJsonConverter implements JsonDeserializer<Bitmap>, JsonSerializer<Bitmap> {

    @Override
    public JsonElement serialize(Bitmap src, Type typeOfSrc, JsonSerializationContext context) {
        ByteArrayOutputStream stream = new ByteArrayOutputStream();
        src.compress(Bitmap.CompressFormat.JPEG, 80, stream);
        String base64Encoded = Base64.encodeToString(stream.toByteArray(), Base64.NO_WRAP);
        return new JsonPrimitive(base64Encoded);
    }

    @Override
    public Bitmap deserialize(JsonElement src, Type typeOfSrc, JsonDeserializationContext context)
            throws JsonParseException {
        String base64Encoded = src.getAsJsonPrimitive().getAsString();
        byte[] data = Base64.decode(base64Encoded, Base64.NO_WRAP);
        return BitmapFactory.decodeByteArray(data, 0, data.length);
    }
}