com.meg7.soas.util.BitmapLruCache.java Source code

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Here is the source code for com.meg7.soas.util.BitmapLruCache.java

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/*
 * Copyright 2014 Mostafa Gazar <eng.mostafa.gazar@gmail.com>
 *
 * 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.meg7.soas.util;

import android.annotation.SuppressLint;
import android.graphics.Bitmap;
import android.os.Build;
import android.os.Build.VERSION_CODES;
import android.support.v4.util.LruCache;

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

/**
 * Bitmap memory cache.
 *
 * @author Mostafa Gazar <eng.mostafa.gazar@gmail.com>
 */
public class BitmapLruCache extends LruCache<String, Bitmap> implements ImageCache {

    public static int getDefaultLruCacheSize() {
        final int maxMemory = (int) (Runtime.getRuntime().maxMemory() / 1024);
        final int cacheSize = maxMemory / 8;

        return cacheSize;
    }

    public BitmapLruCache() {
        this(getDefaultLruCacheSize());
    }

    public BitmapLruCache(int sizeInKiloBytes) {
        super(sizeInKiloBytes);
    }

    @SuppressLint("NewApi")
    @Override
    protected int sizeOf(String key, Bitmap bitmap) {
        // The cache size will be measured in kilobytes rather than
        // number of items.
        if (Build.VERSION.SDK_INT >= VERSION_CODES.KITKAT) {
            return bitmap.getAllocationByteCount() / 1024;
        } else if (Build.VERSION.SDK_INT >= VERSION_CODES.HONEYCOMB_MR1) {
            return bitmap.getByteCount() / 1024;
        } else {
            return bitmap.getRowBytes() * bitmap.getHeight() / 1024;
        }
    }

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

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