BitmapCache.java

package com.idunnolol.sotm;

import android.content.Context;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.util.LruCache;
import com.danlew.utils.Log;

public class BitmapCache {

    private static Context sAppContext;

    private static LruCache<Integer, Bitmap> sCache;

    private static final int SCALE = 1024; // Measure everything in KB

    public static void init(Context context) {
        sAppContext = context.getApplicationContext();

        // Use 1/8th of the available memory for this memory cache.
        final int maxMemory = (int) (Runtime.getRuntime().maxMemory() / SCALE);
        final int cacheSize = maxMemory / 8;

        Log.i("Creating Bitmap cache size of: " + cacheSize + " (total memory " + maxMemory + ")");

        sCache = new LruCache<Integer, Bitmap>(cacheSize) {
            @Override
            protected int sizeOf(Integer key, Bitmap bitmap) {
                return bitmap.getByteCount() / SCALE;
            }
        };
    }

    public static Bitmap getBitmap(int drawableResId) {
        Bitmap bitmap = sCache.get(drawableResId);
        if (bitmap == null) {
            bitmap = BitmapFactory.decodeResource(sAppContext.getResources(), drawableResId);
            sCache.put(drawableResId, bitmap);
        }
        return bitmap;
    }
}