Bitmap Cache Using LRU Cache
suggest changeLRU Cache
The following example code demonstrates a possible implementation of the LruCache class for caching images.
private LruCache<String, Bitmap> mMemoryCache;
Here string value is key for bitmap value.
// Get max available VM memory, exceeding this amount will throw an
// OutOfMemory exception. Stored in kilobytes as LruCache takes an
// int in its constructor.
final int maxMemory = (int) (Runtime.getRuntime().maxMemory() / 1024);
// Use 1/8th of the available memory for this memory cache.
final int cacheSize = maxMemory / 8;
mMemoryCache = new LruCache<String, Bitmap>(cacheSize) {
@Override
protected int sizeOf(String key, Bitmap bitmap) {
// The cache size will be measured in kilobytes rather than
// number of items.
return bitmap.getByteCount() / 1024;
}
};
For add bitmap to the memory cache
public void addBitmapToMemoryCache(String key, Bitmap bitmap) {
if (getBitmapFromMemCache(key) == null) {
mMemoryCache.put(key, bitmap);
}
}
For get bitmap from memory cache
public Bitmap getBitmapFromMemCache(String key) {
return mMemoryCache.get(key);
}
For loading bitmap into imageview just use getBitmapFromMemCache(“Pass key”).
Found a mistake? Have a question or improvement idea?
Let me know.
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