Android Open Source - volley Bitmap Cache

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License

The source code is released under:

Apache License

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Java Source Code

package com.android.volley.toolbox;
/*from  w w  w  . j av  a 2s .  c om*/
import android.annotation.TargetApi;
import android.app.ActivityManager;
import android.content.Context;
import android.graphics.Bitmap;
import android.os.Build;
import android.support.v4.util.LruCache;

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

public class BitmapCache implements ImageCache {
  private static BitmapCache sUniqueInstance = null;
  public LruCache<String, Bitmap> mCache;
  
  public static synchronized BitmapCache getSigleton(Context context) {
    if (sUniqueInstance == null) {
      sUniqueInstance = new BitmapCache(context.getApplicationContext());
    }
    return sUniqueInstance;
  }

  @TargetApi(Build.VERSION_CODES.KITKAT)
    private BitmapCache(Context context) {
        if (mCache == null) {
            int maxSize = getCacheSize(context);
            mCache = new LruCache<String, Bitmap>(maxSize) {
                
                @Override
                protected int sizeOf(String key, Bitmap bitmap) {
                    int size = 1;
                    if (Utils.hasKitKat()) { // API
                        size = bitmap.getAllocationByteCount();
                    } else if (Utils.hasHoneycombMR1()) {// API
                        size = bitmap.getByteCount();
                    } else {
                        size = bitmap.getRowBytes() * bitmap.getHeight();
                    }
//                    LogUtils.d("bacy", key + "<bitmap>" + size);
                    return size;
                }

            };
        }

    }

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

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

  private int getCacheSize(Context context) {
    int memClass = ((ActivityManager) context.getSystemService(Context.ACTIVITY_SERVICE)).getMemoryClass();
    // Use 1/8th of the available memory for this memory cache.
//    LogUtils.d("bacy", memClass + "" +  1024 * 1024 * memClass / 8);
    return (1024 * 1024 * memClass / 8);
  }

}

Java Source Code List