True if a refresh is needed from the original data source.

Drops the entry for {@code key} if it exists and can be removed. Entries actively being edited cannot be removed. @return true if an entry was remove

Removes the entry identified by 'key' from the cache.

继续图片加载任务 resume @since 3.6

Prepares for the next retry by applying a backoff to the timeout. @param error The error code of the last attempt. @throws VolleyError In the event th

Returns a URL to use instead of the provided one, or null to indicate this URL should not be used at all.

Sets the default image resource ID to be used for this view until the attempt to load it completes.

Set the error for this response

Sets the error image resource ID to be used for this view in the event that the image requested fails to load.

Sets URL of the image that should be loaded into this view. Note that calling this will immediately either set the cached image (if available) or the

Set lengths using decimal numbers like "10123".

Sets the redirect url to handle 3xx http responses.

Associates this request with the given queue. The request queue will be notified when this request has finished. @return This Request object to allow

Sets the sequence number of this request. Used by {@link RequestQueue}. @return This Request object to allow for chaining.

Returns the size of the entry for {@code key} and {@code value} in user-defined units. The default implementation returns 1 so that size is the numbe

Stops the cache and network dispatchers.

Reads the contents of an InputStream into a byte[].

Creates a new authenticator. @param context Context for accessing AccountManager @param account Account to authenticate as @param authTokenType Auth t

@param httpStack HTTP stack to be used

Constructs a new BatchedImageRequest object @param request The request being tracked @param container The ImageContainer of the person who initiated t

@param sizeLimit the maximum size of the pool, in bytes

Creates a new cache triage dispatcher thread. You must call {@link #start()} in order to begin processing. @param cacheQueue Queue of incoming reque

Creates a synthetic request for clearing the cache. @param cache Cache to clear @param callback Callback to make on the main thread once the cache is

Constructs a new retry policy using the default timeouts.

Constructs an instance of the DiskBasedCache at the specified directory. @param rootDirectory The root directory of the cache. @param maxCacheSizeInBy

Creates a new response delivery interface. @param handler {@link Handler} to post responses on

@param name String - name of parameter (may not be <code>null</code>). @param file File (may not be <code>null</code>). @param filename String. If <co

Create a set of image cache parameters that can be provided to {@link EfficientImageCache#getInstance(FragmentManager, ImageCacheParams)} or {@link Im

Constructs a BitmapContainer object. @param bitmap The final bitmap (if it exists). @param requestUrl The requested URL for this container. @param cac

Constructs a new ImageLoader. @param queue The RequestQueue to use for making image requests. @param imageCache The cache to use as an L1 cache.

Creates a new image request, decoding to a maximum specified width and height. If both width and height are zero, the image will be decoded to its nat

Creates a new request. @param url URL to fetch the JSON from @param listener Listener to receive the JSON response @param errorListener Error listener

Creates a new request. @param method the HTTP method to use @param url URL to fetch the JSON from @param jsonRequest A {@link JSONObject} to post with

Deprecated constructor for a JsonRequest which defaults to GET unless {@link #getPostBody()} or {@link #getPostParams()} is overridden (which defaults

@param maxSize for caches that do not override {@link #sizeOf}, this is the maximum number of entries in the cache. For all other caches, this