// Returns the distance that over the scroll limit.
public int startScroll(int distance, int min, int max) {
int currPosition = mScroller.getCurrX();
int finalPosition = mScroller.isFinished() ? currPosition : mScroller.getFinalX();
int newPosition = Utils.clamp(finalPosition + distance, min, max);
if (newPosition != currPosition) {
mScroller.startScroll(currPosition, 0, newPosition - currPosition, 0, 0);
}
return finalPosition + distance - newPosition;
}
public void clearImageData(MediaPath path, long timeModified, int type) {
byte[] key = makeKey(path, timeModified, type);
long cacheKey = Utils.crc64Long(key);
synchronized (mCache) {
try {
mCache.clearEntry(cacheKey);
} catch (IOException ex) {
// ignore.
}
}
}
public void putImageData(MediaPath path, long timeModified, int type, byte[] value) {
byte[] key = makeKey(path, timeModified, type);
long cacheKey = Utils.crc64Long(key);
ByteBuffer buffer = ByteBuffer.allocate(key.length + value.length);
buffer.put(key);
buffer.put(value);
synchronized (mCache) {
try {
mCache.insert(cacheKey, buffer.array());
} catch (IOException ex) {
// ignore.
}
}
}
/**
* Gets the cached image data for the given <code>path</code>, <code>timeModified</code> and
* <code>type</code>.
*
* <p>The image data will be stored in <code>buffer.data</code>, started from <code>buffer.offset
* </code> for <code>buffer.length</code> bytes. If the buffer.data is not big enough, a new byte
* array will be allocated and returned.
*
* @return true if the image data is found; false if not found.
*/
public boolean getImageData(MediaPath path, long timeModified, int type, BytesBuffer buffer) {
byte[] key = makeKey(path, timeModified, type);
long cacheKey = Utils.crc64Long(key);
try {
LookupRequest request = new LookupRequest();
request.key = cacheKey;
request.buffer = buffer.data;
synchronized (mCache) {
if (!mCache.lookup(request)) return false;
}
if (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;
}