com.bugsbunnybr.benchmarks.volley.LruBitmapCache.java Source code

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Here is the source code for com.bugsbunnybr.benchmarks.volley.LruBitmapCache.java

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/*******************************************************************************
 * Copyright 2014 Jlio Cesar Bueno Cotta
 *
 * 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.bugsbunnybr.benchmarks.volley;

import android.content.Context;
import android.graphics.Bitmap;
import android.support.v4.util.LruCache;
import android.util.DisplayMetrics;

import com.android.volley.toolbox.ImageLoader.ImageCache;

public class LruBitmapCache extends LruCache<String, Bitmap> implements ImageCache {

    private static LruBitmapCache INSTANCE;

    public static synchronized LruBitmapCache getInstance(Context context) {
        if (INSTANCE == null) {
            int cacheSize = getCacheSize(context);
            INSTANCE = new LruBitmapCache(cacheSize);
        }
        return INSTANCE;
    }

    private LruBitmapCache(int maxSize) {
        super(maxSize);
    }

    @Override
    protected int sizeOf(String key, Bitmap value) {
        return value.getRowBytes() * value.getHeight();
    }

    @Override
    public Bitmap getBitmap(String url) {
        return get(url);
    }

    @Override
    public void putBitmap(String url, Bitmap bitmap) {
        put(url, bitmap);
    }

    private static int getCacheSize(Context context) {
        final DisplayMetrics displayMetrics = context.getResources().getDisplayMetrics();
        final int screenWidth = displayMetrics.widthPixels;
        final int screenHeight = displayMetrics.heightPixels;
        final int screenBytes = screenWidth * screenHeight * 4; // 4 bytes per pixel

        return screenBytes * 5;
    }
}