com.digipom.manteresting.android.service.cache.BitmapMemoryCache.java Source code

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Here is the source code for com.digipom.manteresting.android.service.cache.BitmapMemoryCache.java

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/*
 * Copyright (C) 2013 Digipom Inc.
 *
 * 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.digipom.manteresting.android.service.cache;

import java.lang.reflect.Method;

import android.graphics.Bitmap;
import android.os.Build;
import android.support.v4.util.LruCache;
import android.util.Log;

import com.digipom.manteresting.android.config.LoggerConfig;

class BitmapMemoryCache extends LruCache<String, BitmapWithCategory> {
    private static final String TAG = "BitmapMemoryCache";

    private static final Method getByteCount;

    static {
        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.HONEYCOMB_MR1) {
            Method tryGetByteCount = null;

            try {
                tryGetByteCount = Bitmap.class.getMethod("getByteCount", (Class[]) null);
            } catch (Exception e) {
                if (LoggerConfig.canLog(Log.ERROR)) {
                    Log.e(TAG, "Could not get reflected method for getByteCount", e);
                }
            }

            getByteCount = tryGetByteCount;
        } else {
            getByteCount = null;
        }
    }

    BitmapMemoryCache(int maxSizeInBytes) {
        super(maxSizeInBytes);
    }

    @Override
    protected void entryRemoved(boolean evicted, String key, BitmapWithCategory oldValue,
            BitmapWithCategory newValue) {
        if (LoggerConfig.canLog(Log.VERBOSE)) {
            Log.v(TAG, "Removing entry: " + key);
        }

        super.entryRemoved(evicted, key, oldValue, newValue);
        oldValue.bitmap.recycle();
    }

    @Override
    protected int sizeOf(String key, BitmapWithCategory value) {
        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.HONEYCOMB_MR1) {
            return getByteCountHoneyCombMr1(value.bitmap);
        } else {
            return value.bitmap.getRowBytes() * value.bitmap.getHeight();
        }
    }

    private static final int getByteCountHoneyCombMr1(Bitmap bitmap) {
        try {
            final Integer byteCount = (Integer) getByteCount.invoke(bitmap, (Object[]) null);
            return byteCount;
        } catch (Exception e) {
            if (LoggerConfig.canLog(Log.ERROR)) {
                Log.e(TAG, "Reflection call failed.", e);
            }

            return -1;
        }
    }
}