/**
* 从sdcard中获取内存缓存
*
* @param url 图片url地址
* @param buffer 填充缓存区
* @return 是否获得图片
*/
public boolean getImageData(String url, BytesBuffer buffer) {
if (mDiskCache == null) return false;
byte[] key = Utils.makeKey(url);
long cacheKey = Utils.crc64Long(key);
try {
LookupRequest request = new LookupRequest();
request.key = cacheKey;
request.buffer = buffer.data;
synchronized (mDiskCache) {
if (!mDiskCache.lookup(request)) return false;
}
if (Utils.isSameKey(key, request.buffer)) {
buffer.data = request.buffer;
buffer.offset = key.length;
buffer.length = request.length - buffer.offset;
return true;
}
} catch (IOException ex) {
// ignore.
}
return false;
}
