Profile

default static final String DEFAULT_PROFILE_NAME = "Default"

Represents the name of the default profile which can't be deleted.

@RequiresFeature(name = WebViewFeature.CUSTOM_REQUEST_HEADERS, enforcement = "androidx.webkit.WebViewFeature#isFeatureSupported")
@UiThread
default void addCustomHeader(@NonNull CustomHeader header)

Add a header for outgoing requests that match the given origin rules.

It applies to all requests that are initiated after this method is called, including prefetch requests and requests sent from service workers. It does not apply the header to WebSocket requests.

Headers added through this API will be present in the set returned by getRequestHeaders provided in shouldInterceptRequest.

If this method is called multiple times with headers that have the same name and value, then the sets of origin rules will be merged into a single set.

If multiple headers with the same name but different values match a request, then all the values will be sent in a comma-separated list of values following the guidance for repeated header fields. This does not take into account whether such merging is safe.

Headers are considered the same if their name matches case-insensitive and their value matches case-sensitive. This follows RFC 9110, which states that "field names are case insensitive". This API will use the casing of the first custom header encountered.

@RequiresFeature(name = WebViewFeature.ADD_QUIC_HINTS_V1, enforcement = "androidx.webkit.WebViewFeature#isFeatureSupported")
@UiThread
@Profile.ExperimentalAddQuicHints
default void addQuicHints(@NonNull Set<@NonNull String> urls)

Advises that the given origins support the QUIC protocol and that WebView should use that to connect to them.

By default, when connecting to a new server, WebView attempts both a HTTP3 (QUIC) and HTTP2 connection, choosing the one that responds faster. This can leads to cases where HTTP2 responds faster, even though HTTP3 is supported and would result in a faster overall load. Calling this API tells WebView to prefer HTTP3 connections for these origins.

Note: addQuicHints operates on origins, but for convenience full URLs can be provided. A full URL (such as https://www.example.com/index.html) will be treated as its origin (https://www.example.com).

This method can be called multiple times and the result is additive - QUIC hints are applied to all of the origins provided to all calls. Providing the same origin multiple times has no further effect.

@RequiresFeature(name = WebViewFeature.CUSTOM_REQUEST_HEADERS, enforcement = "androidx.webkit.WebViewFeature#isFeatureSupported")
@UiThread
default void clearAllCustomHeaders()

Remove any currently set headers from being applied to network requests.

@RequiresFeature(name = WebViewFeature.ORIGIN_MATCHED_HEADERS, enforcement = "androidx.webkit.WebViewFeature#isFeatureSupported")
@UiThread
@Profile.ExperimentalOriginMatchedHeader
abstract void clearAllOriginMatchedHeaders()

Remove any currently set headers from being applied to network requests.

@RequiresFeature(name = WebViewFeature.CUSTOM_REQUEST_HEADERS, enforcement = "androidx.webkit.WebViewFeature#isFeatureSupported")
@UiThread
default void clearCustomHeader(@NonNull String headerName)

Removes the specified headers from the set of headers attached to requests. This will remove all configured headers that match headerName.

It is safe to call this method even if headerName has not previously been set via addCustomHeader or setOriginMatchedHeader.

This method is case insensitive.

@RequiresFeature(name = WebViewFeature.CUSTOM_REQUEST_HEADERS, enforcement = "androidx.webkit.WebViewFeature#isFeatureSupported")
@UiThread
default void clearCustomHeader(@NonNull String headerName, @NonNull String headerValue)

Removes the specified header from the set of headers attached to requests.

It is safe to call this method even if (headerName, headerValue) has not previously been set via addCustomHeader or setOriginMatchedHeader.

This method is case insensitive for name but case-sensitive for value.

@RequiresFeature(name = WebViewFeature.ORIGIN_MATCHED_HEADERS, enforcement = "androidx.webkit.WebViewFeature#isFeatureSupported")
@UiThread
@Profile.ExperimentalOriginMatchedHeader
abstract void clearOriginMatchedHeader(@NonNull String headerName)

Removes the specified header from the set of headers attached to requests.

It is safe to call this method even if headerName has not previously been set via setOriginMatchedHeader

This method is case sensitive.

@RequiresFeature(name = WebViewFeature.PROFILE_URL_PREFETCH, enforcement = "androidx.webkit.WebViewFeature#isFeatureSupported")
@UiThread
@Profile.ExperimentalUrlPrefetch
abstract void clearPrefetchAsync(
    @NonNull String url,
    @NonNull Executor callbackExecutor,
    @NonNull OutcomeReceiverCompat<Void, PrefetchException> operationCallback
)

Removes a cached prefetch response for the provided url if it exists, otherwise does nothing.

Calling this does not guarantee that the prefetched response will not be served to a WebView before it is cleared.

@AnyThread
@RequiresFeature(name = WebViewFeature.MULTI_PROFILE, enforcement = "androidx.webkit.WebViewFeature#isFeatureSupported")
abstract @NonNull CookieManager getCookieManager()

Returns the profile's cookie manager.

Can be called from any thread.

@RequiresFeature(name = WebViewFeature.CUSTOM_REQUEST_HEADERS, enforcement = "androidx.webkit.WebViewFeature#isFeatureSupported")
@UiThread
@RequiresApi(api = Build.VERSION_CODES.N)
default @NonNull Set<CustomHeader> getCustomHeaders()

Returns all custom headers set with addCustomHeader or setOriginMatchedHeader.

@RequiresFeature(name = WebViewFeature.CUSTOM_REQUEST_HEADERS, enforcement = "androidx.webkit.WebViewFeature#isFeatureSupported")
@UiThread
@RequiresApi(api = Build.VERSION_CODES.N)
default @NonNull Set<CustomHeader> getCustomHeaders(@NonNull String name)

Returns all custom headers set with addCustomHeader or setOriginMatchedHeader which have the specified name.

This method is case insensitive.

@RequiresFeature(name = WebViewFeature.CUSTOM_REQUEST_HEADERS, enforcement = "androidx.webkit.WebViewFeature#isFeatureSupported")
@UiThread
@RequiresApi(api = Build.VERSION_CODES.N)
default @NonNull Set<CustomHeader> getCustomHeaders(@NonNull String name, @NonNull String value)

Returns all custom headers set with addCustomHeader or setOriginMatchedHeader which have the specified name and value.

This method is case insensitive for name but case-sensitive for value.

@AnyThread
@RequiresFeature(name = WebViewFeature.MULTI_PROFILE, enforcement = "androidx.webkit.WebViewFeature#isFeatureSupported")
abstract @NonNull GeolocationPermissions getGeolocationPermissions()

Returns the geolocation permissions of the profile.

Can be called from any thread.

@AnyThread
@RequiresFeature(name = WebViewFeature.MULTI_PROFILE, enforcement = "androidx.webkit.WebViewFeature#isFeatureSupported")
abstract @NonNull ServiceWorkerController getServiceWorkerController()

Returns the service worker controller of the profile.

Can be called from any thread.

@AnyThread
@RequiresFeature(name = WebViewFeature.MULTI_PROFILE, enforcement = "androidx.webkit.WebViewFeature#isFeatureSupported")
abstract @NonNull WebStorage getWebStorage()

Returns the profile's web storage.

Can be called from any thread.

@RequiresFeature(name = WebViewFeature.CUSTOM_REQUEST_HEADERS, enforcement = "androidx.webkit.WebViewFeature#isFeatureSupported")
@UiThread
default boolean hasCustomHeader(@NonNull String headerName)

Returns true if the profile has a value set for the given header name.

This method is case insensitive.

@RequiresFeature(name = WebViewFeature.ORIGIN_MATCHED_HEADERS, enforcement = "androidx.webkit.WebViewFeature#isFeatureSupported")
@UiThread
@Profile.ExperimentalOriginMatchedHeader
abstract boolean hasOriginMatchedHeader(@NonNull String headerName)

Returns true if the profile has a value set for the given header name.

This method is case sensitive.

@RequiresFeature(name = WebViewFeature.PRECONNECT, enforcement = "androidx.webkit.WebViewFeature#isFeatureSupported")
@UiThread
@Profile.ExperimentalPreconnect
default void preconnect(@NonNull String url)

Preconnects to the given origin, this can speed up future loads.

Opens a connection to the provided origin, performing DNS lookup and TCP/TLS handshakes. This can speed up future loads to the origin which could use the open connection. The connection will remain open (and can be reused by future loads) until it times out (roughly 30s).

The main benefit of this API is to preconnect to origins that haven't yet been visited by a WebView - it provides no further performance benefit to origins that have already been loaded.

Note: Preconnect operates on origins, but for convenience full URLs can be provided. A call with a full URL (such as https://www.example.com/index.html) will be treated as a call to the origin (https://www.example.com).

Multiple origins can be connected to by calling this API multiple times.

See: HTML Preconnect Specification

@RequiresFeature(name = WebViewFeature.PROFILE_URL_PREFETCH, enforcement = "androidx.webkit.WebViewFeature#isFeatureSupported")
@AnyThread
@Profile.ExperimentalUrlPrefetch
abstract void prefetchUrlAsync(
    @NonNull String url,
    @Nullable CancellationSignal cancellationSignal,
    @NonNull Executor callbackExecutor,
    @NonNull OutcomeReceiverCompat<Void, PrefetchException> operationCallback
)

Starts a URL prefetch request.

All WebViews associated with this Profile will use a URL request matching algorithm during execution of all variants of loadUrl for determining if there was already a prefetch request executed for the provided URL. This includes prefetches that are "in progress". If a prefetch is matched, WebView will leverage that for handling the URL, otherwise the URL will be handled normally (i.e. through a network request).

Applications will still be responsible for calling loadUrl to display web contents in a WebView.

NOTE: Additional headers passed to loadUrl are not considered in the matching algorithm for determining whether or not to serve a prefetched response to a navigation.

For max latency saving benefits, it is recommended to call this method as early as possible (i.e. before any WebView associated with this profile is created).

Only supports HTTPS scheme.

@RequiresFeature(name = WebViewFeature.PROFILE_URL_PREFETCH, enforcement = "androidx.webkit.WebViewFeature#isFeatureSupported")
@AnyThread
@Profile.ExperimentalUrlPrefetch
abstract void prefetchUrlAsync(
    @NonNull String url,
    @Nullable CancellationSignal cancellationSignal,
    @NonNull Executor callbackExecutor,
    @NonNull SpeculativeLoadingParameters speculativeLoadingParameters,
    @NonNull OutcomeReceiverCompat<Void, PrefetchException> operationCallback
)

Starts a URL prefetch request.

All WebViews associated with this Profile will use a URL request matching algorithm during execution of all variants of loadUrl for determining if there was already a prefetch request executed for the provided URL. This includes prefetches that are "in progress". If a prefetch is matched, WebView will leverage that for handling the URL, otherwise the URL will be handled normally (i.e. through a network request).

Applications will still be responsible for calling loadUrl to display web contents in a WebView.

NOTE: Additional headers passed to loadUrl are not considered in the matching algorithm for determining whether or not to serve a prefetched response to a navigation.

For max latency saving benefits, it is recommended to call this method as early as possible (i.e. before any WebView associated with this profile is created).

Only supports HTTPS scheme.

@RequiresFeature(name = WebViewFeature.ORIGIN_MATCHED_HEADERS, enforcement = "androidx.webkit.WebViewFeature#isFeatureSupported")
@UiThread
@Profile.ExperimentalOriginMatchedHeader
abstract void setOriginMatchedHeader(
    @NonNull String headerName,
    @NonNull String headerValue,
    @NonNull Set<String> originRules
)

Set a custom header to be applied to HTTP requests to the specified origins.

It applies to all requests that are initiated after this method is called, including prefetch requests and requests sent from service workers. It does not apply the header to WebSocket requests.

Headers added through this API will be present in the set returned by getRequestHeaders provided in shouldInterceptRequest and shouldInterceptRequest.

Calling this method again with the same headerName parameter will overwrite any previously set mapping.

@RequiresFeature(name = WebViewFeature.SPECULATIVE_LOADING_CONFIG, enforcement = "androidx.webkit.WebViewFeature#isFeatureSupported")
@UiThread
@Profile.ExperimentalUrlPrefetch
abstract void setSpeculativeLoadingConfig(
    @NonNull SpeculativeLoadingConfig speculativeLoadingConfig
)

Sets the SpeculativeLoadingConfig for the current profile session. These configurations will be applied to any Prefetch requests made after they are set; they will not be applied to in-flight requests.

These configurations will be applied to any prefetch requests initiated by a prerender request. This applies specifically to WebViews that are associated with this Profile.

@RequiresFeature(name = WebViewFeature.WARM_UP_RENDERER_PROCESS, enforcement = "androidx.webkit.WebViewFeature#isFeatureSupported")
@UiThread
@Profile.ExperimentalWarmUpRendererProcess
abstract void warmUpRendererProcess()

Initiates warm-up of the renderer process associated with this Profile.

If no renderer currently exists for the profile, this will kick off the process of starting one in the background. This call does not block or guarantee that the renderer will be fully started by the time it returns.

This can be used to reduce perceived latency when a renderer is needed shortly after.