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Android APIs
public abstract class

ResponseCache

extends Object
java.lang.Object
   ↳ java.net.ResponseCache
Known Direct Subclasses

Class Overview

Caches URLConnection responses.

The system's default cache can be set using setDefault(ResponseCache) . If getUseCaches() returns true, URLConnection will use the default response cache, if one has been set.

Although URLConnection will always call put(URI, URLConnection) , the specific ResponseCache implementation gets to decide what will actually be cached, and for how long.

Summary

Public Constructors
ResponseCache ()
Public Methods
abstract CacheResponse >)">get ( URI uri, String requestMethod, Map < String ,  List < String >> requestHeaders)
Returns the cached response corresponding to the given request.
static ResponseCache getDefault ()
Returns the system's default response cache, or null.
abstract CacheRequest put ( URI uri, URLConnection connection)
Allows the protocol handler to cache data after retrieving resources.
static void setDefault ( ResponseCache responseCache)
Sets the system's default response cache.
[Expand]
Inherited Methods
From class java.lang.Object

Public Constructors

public ResponseCache ()

Added in API level 1

Public Methods

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public abstract CacheResponse get ( URI uri, String requestMethod, Map < String ,  List < String >> requestHeaders)

Added in API level 1

Returns the cached response corresponding to the given request.

Parameters
uri the request URI.
requestMethod the request method.
requestHeaders a map of request headers.
Returns
  • the CacheResponse object if the request is available in the cache or null otherwise.
Throws
IOException if an I/O error occurs while getting the cached data.
IllegalArgumentException if any one of the parameters is set to null .

public static ResponseCache getDefault ()

Added in API level 1

Returns the system's default response cache, or null.

public abstract CacheRequest put ( URI uri, URLConnection connection)

Added in API level 1

Allows the protocol handler to cache data after retrieving resources. The ResponseCache decides whether the resource data should be cached or not. If so, this method returns a CacheRequest to write the resource data to. Otherwise, this method returns null .

Parameters
uri the reference to the requested resource.
connection the connection to fetch the response.
Returns
  • a CacheRequest object with a WriteableByteChannel if the resource has to be cached, null otherwise.
Throws
IOException if an I/O error occurs while adding the resource.
IllegalArgumentException if any one of the parameters is set to null .

public static void setDefault ( ResponseCache responseCache)

Added in API level 1

Sets the system's default response cache. Use null to remove the response cache.