Added in API level 34
Also in S Extensions 7

Callback

interface Callback
android.net.http.UrlRequest.Callback

Users of the HTTP stack extend this class to receive callbacks indicating the progress of a UrlRequest being processed. An instance of this class is passed in to UrlRequest.Builder's constructor when constructing the UrlRequest.

Note: All methods will be invoked on the thread of the java.util.concurrent.Executor used during construction of the UrlRequest.

Summary

Public methods
abstract Unit

Invoked if request was canceled via UrlRequest.cancel.
abstract Unit
onFailed(request: UrlRequest, info: UrlResponseInfo?, error: HttpException)

Invoked if request failed for any reason after UrlRequest.start.
abstract Unit
onReadCompleted(request: UrlRequest, info: UrlResponseInfo, byteBuffer: ByteBuffer)

Invoked whenever part of the response body has been read.
abstract Unit
onRedirectReceived(request: UrlRequest, info: UrlResponseInfo, newLocationUrl: String)

Invoked whenever a redirect is encountered.
abstract Unit

Invoked when the final set of headers, after all redirects, is received.
abstract Unit

Invoked when request is completed successfully.

Public methods

onCanceled

Added in API level 34
Also in S Extensions 7
abstract fun onCanceled(
    request: UrlRequest, 
    info: UrlResponseInfo?
): Unit

Invoked if request was canceled via UrlRequest.cancel. Once invoked, no other Callback methods will be invoked. Default implementation takes no action.

Parameters
request UrlRequest: Request that was canceled. This is not guaranteed to be the same object as the one received by other callbacks, nor is it guaranteed to be the one returned by URLRequest.Builder#build. However, method calls on this object will have the same effects as calls on the original URLRequest. This value cannot be null.
info UrlResponseInfo?: Response information. May be null if no response was received.

onFailed

Added in API level 34
Also in S Extensions 7
abstract fun onFailed(
    request: UrlRequest, 
    info: UrlResponseInfo?, 
    error: HttpException
): Unit

Invoked if request failed for any reason after UrlRequest.start. Once invoked, no other Callback methods will be invoked. error provides information about the failure.

Parameters
request UrlRequest: Request that failed. This is not guaranteed to be the same object as the one received by other callbacks, nor is it guaranteed to be the one returned by URLRequest.Builder#build. However, method calls on this object will have the same effects as calls on the original URLRequest. This value cannot be null.
info UrlResponseInfo?: Response information. May be null if no response was received.
error HttpException: information about error. This value cannot be null.

onReadCompleted

Added in API level 34
Also in S Extensions 7
abstract fun onReadCompleted(
    request: UrlRequest, 
    info: UrlResponseInfo, 
    byteBuffer: ByteBuffer
): Unit

Invoked whenever part of the response body has been read. Only part of the buffer may be populated, even if the entire response body has not yet been consumed. With the exception of onCanceled(), no other Callback method will be invoked for the request, including onSucceeded() and onFailed(), until UrlRequest.read() is called to attempt to continue reading the response body.

Parameters
request UrlRequest: Request that received data. This is not guaranteed to be the same object as the one received by other callbacks, nor is it guaranteed to be the one returned by URLRequest.Builder#build. However, method calls on this object will have the same effects as calls on the original URLRequest. This value cannot be null.
info UrlResponseInfo: Response information. This value cannot be null.
byteBuffer ByteBuffer: The buffer that was passed in to UrlRequest.read(), now containing the received data. The buffer's position is updated to the end of the received data. The buffer's limit is not changed. This value cannot be null.
Exceptions
java.lang.Exception if an error occurs while processing a read completion. onFailed will be called with the thrown exception set as the cause of the CallbackException.

onRedirectReceived

Added in API level 34
Also in S Extensions 7
abstract fun onRedirectReceived(
    request: UrlRequest, 
    info: UrlResponseInfo, 
    newLocationUrl: String
): Unit

Invoked whenever a redirect is encountered. This will only be invoked between the call to UrlRequest.start and onResponseStarted(). The body of the redirect response, if it has one, will be ignored. The redirect will not be followed until the URLRequest's android.net.http.UrlRequest#followRedirect method is called, either synchronously or asynchronously.

Parameters
request UrlRequest: Request being redirected. This is not guaranteed to be the same object as the one received by other callbacks, nor is it guaranteed to be the one returned by URLRequest.Builder#build. However, method calls on this object will have the same effects as calls on the original URLRequest. This value cannot be null.
info UrlResponseInfo: Response information. This value cannot be null.
newLocationUrl String: Location where request is redirected. This value cannot be null.
Exceptions
java.lang.Exception if an error occurs while processing a redirect. onFailed will be called with the thrown exception set as the cause of the CallbackException.

onResponseStarted

Added in API level 34
Also in S Extensions 7
abstract fun onResponseStarted(
    request: UrlRequest, 
    info: UrlResponseInfo
): Unit

Invoked when the final set of headers, after all redirects, is received. Will only be invoked once for each request. With the exception of onCanceled(), no other Callback method will be invoked for the request, including onSucceeded() and onFailed(), until UrlRequest.read() is called to attempt to start reading the response body.

Parameters
request UrlRequest: Request that started to get response. This is not guaranteed to be the same object as the one received by other callbacks, nor is it guaranteed to be the one returned by URLRequest.Builder#build. However, method calls on this object will have the same effects as calls on the original URLRequest. This value cannot be null.
info UrlResponseInfo: Response information. This value cannot be null.
Exceptions
java.lang.Exception if an error occurs while processing response start. onFailed will be called with the thrown exception set as the cause of the CallbackException.

onSucceeded

Added in API level 34
Also in S Extensions 7
abstract fun onSucceeded(
    request: UrlRequest, 
    info: UrlResponseInfo
): Unit

Invoked when request is completed successfully. Once invoked, no other Callback methods will be invoked.

Parameters
request UrlRequest: Request that succeeded. This is not guaranteed to be the same object as the one received by other callbacks, nor is it guaranteed to be the one returned by URLRequest.Builder#build. However, method calls on this object will have the same effects as calls on the original URLRequest. This value cannot be null.
info UrlResponseInfo: Response information. This value cannot be null.