WebViewFeature

open class WebViewFeature

kotlin.Any
↳	androidx.webkit.WebViewFeature

Utility class for checking which WebView Support Library features are supported on the device.

Summary

Constants
static String	`VISUAL_STATE_CALLBACK` Feature for `isFeatureSupported(String)`.
static String	`OFF_SCREEN_PRERASTER` Feature for `isFeatureSupported(String)`.
static String	`SAFE_BROWSING_ENABLE` Feature for `isFeatureSupported(String)`.
static String	`DISABLED_ACTION_MODE_MENU_ITEMS` Feature for `isFeatureSupported(String)`.
static String	`START_SAFE_BROWSING` Feature for `isFeatureSupported(String)`.
static String	`SAFE_BROWSING_WHITELIST` Feature for `isFeatureSupported(String)`.
static String	`SAFE_BROWSING_PRIVACY_POLICY_URL` Feature for `isFeatureSupported(String)`.
static String	`SERVICE_WORKER_BASIC_USAGE` Feature for `isFeatureSupported(String)`.
static String	`SERVICE_WORKER_CACHE_MODE` Feature for `isFeatureSupported(String)`.
static String	`SERVICE_WORKER_CONTENT_ACCESS` Feature for `isFeatureSupported(String)`.
static String	`SERVICE_WORKER_FILE_ACCESS` Feature for `isFeatureSupported(String)`.
static String	`SERVICE_WORKER_BLOCK_NETWORK_LOADS` Feature for `isFeatureSupported(String)`.
static String	`SERVICE_WORKER_SHOULD_INTERCEPT_REQUEST` Feature for `isFeatureSupported(String)`.
static String	`RECEIVE_WEB_RESOURCE_ERROR` Feature for `isFeatureSupported(String)`.
static String	`RECEIVE_HTTP_ERROR` Feature for `isFeatureSupported(String)`.
static String	`SHOULD_OVERRIDE_WITH_REDIRECTS` Feature for `isFeatureSupported(String)`.
static String	`SAFE_BROWSING_HIT` Feature for `isFeatureSupported(String)`.
static String	`WEB_RESOURCE_REQUEST_IS_REDIRECT` Feature for `isFeatureSupported(String)`.
static String	`WEB_RESOURCE_ERROR_GET_DESCRIPTION` Feature for `isFeatureSupported(String)`.
static String	`WEB_RESOURCE_ERROR_GET_CODE` Feature for `isFeatureSupported(String)`.
static String	`SAFE_BROWSING_RESPONSE_BACK_TO_SAFETY` Feature for `isFeatureSupported(String)`.
static String	`SAFE_BROWSING_RESPONSE_PROCEED` Feature for `isFeatureSupported(String)`.
static String	`SAFE_BROWSING_RESPONSE_SHOW_INTERSTITIAL` Feature for `isFeatureSupported(String)`.
static String	`WEB_MESSAGE_PORT_POST_MESSAGE` Feature for `isFeatureSupported(String)`.
static String	`WEB_MESSAGE_PORT_CLOSE` Feature for `isFeatureSupported(String)`.
static String	`WEB_MESSAGE_PORT_SET_MESSAGE_CALLBACK` Feature for `isFeatureSupported(String)`.
static String	`CREATE_WEB_MESSAGE_CHANNEL` Feature for `isFeatureSupported(String)`.
static String	`POST_WEB_MESSAGE` Feature for `isFeatureSupported(String)`.
static String	`WEB_MESSAGE_CALLBACK_ON_MESSAGE` Feature for `isFeatureSupported(String)`.

Public methods
open static Boolean	`isFeatureSupported(@NonNull feature: String)` Return whether a feature is supported at run-time.

Constants

VISUAL_STATE_CALLBACK

static val VISUAL_STATE_CALLBACK: String

Feature for isFeatureSupported(String). This feature covers androidx.webkit.WebViewCompat#postVisualStateCallback(android.webkit.WebView, long, * WebViewCompat.VisualStateCallback), and .

Value: Features.VISUAL_STATE_CALLBACK

OFF_SCREEN_PRERASTER

static val OFF_SCREEN_PRERASTER: String

Feature for isFeatureSupported(String). This feature covers androidx.webkit.WebSettingsCompat#getOffscreenPreRaster(WebSettings), and androidx.webkit.WebSettingsCompat#setOffscreenPreRaster(WebSettings, boolean).

Value: Features.OFF_SCREEN_PRERASTER

SAFE_BROWSING_ENABLE

static val SAFE_BROWSING_ENABLE: String

Feature for isFeatureSupported(String). This feature covers androidx.webkit.WebSettingsCompat#getSafeBrowsingEnabled(WebSettings), and androidx.webkit.WebSettingsCompat#setSafeBrowsingEnabled(WebSettings, boolean).

Value: Features.SAFE_BROWSING_ENABLE

DISABLED_ACTION_MODE_MENU_ITEMS

static val DISABLED_ACTION_MODE_MENU_ITEMS: String

Feature for isFeatureSupported(String). This feature covers androidx.webkit.WebSettingsCompat#getDisabledActionModeMenuItems(WebSettings), and androidx.webkit.WebSettingsCompat#setDisabledActionModeMenuItems(WebSettings, int).

Value: Features.DISABLED_ACTION_MODE_MENU_ITEMS

START_SAFE_BROWSING

static val START_SAFE_BROWSING: String

Feature for isFeatureSupported(String). This feature covers androidx.webkit.WebViewCompat#startSafeBrowsing(Context, ValueCallback).

Value: Features.START_SAFE_BROWSING

SAFE_BROWSING_WHITELIST

static val SAFE_BROWSING_WHITELIST: String

Feature for isFeatureSupported(String). This feature covers androidx.webkit.WebViewCompat#setSafeBrowsingWhitelist(List, ValueCallback).

Value: Features.SAFE_BROWSING_WHITELIST

SAFE_BROWSING_PRIVACY_POLICY_URL

static val SAFE_BROWSING_PRIVACY_POLICY_URL: String

Feature for isFeatureSupported(String). This feature covers WebViewCompat#getSafeBrowsingPrivacyPolicyUrl().

Value: Features.SAFE_BROWSING_PRIVACY_POLICY_URL

SERVICE_WORKER_BASIC_USAGE

static val SERVICE_WORKER_BASIC_USAGE: String

Feature for isFeatureSupported(String). This feature covers ServiceWorkerControllerCompat#getInstance().

Value: Features.SERVICE_WORKER_BASIC_USAGE

SERVICE_WORKER_CACHE_MODE

static val SERVICE_WORKER_CACHE_MODE: String

Feature for isFeatureSupported(String). This feature covers ServiceWorkerWebSettingsCompat#getCacheMode(), and ServiceWorkerWebSettingsCompat#setCacheMode(int).

Value: Features.SERVICE_WORKER_CACHE_MODE

SERVICE_WORKER_CONTENT_ACCESS

static val SERVICE_WORKER_CONTENT_ACCESS: String

Feature for isFeatureSupported(String). This feature covers ServiceWorkerWebSettingsCompat#getAllowContentAccess(), and ServiceWorkerWebSettingsCompat#setAllowContentAccess(boolean).

Value: Features.SERVICE_WORKER_CONTENT_ACCESS

SERVICE_WORKER_FILE_ACCESS

static val SERVICE_WORKER_FILE_ACCESS: String

Feature for isFeatureSupported(String). This feature covers ServiceWorkerWebSettingsCompat#getAllowFileAccess(), and ServiceWorkerWebSettingsCompat#setAllowFileAccess(boolean).

Value: Features.SERVICE_WORKER_FILE_ACCESS

SERVICE_WORKER_BLOCK_NETWORK_LOADS

static val SERVICE_WORKER_BLOCK_NETWORK_LOADS: String

Feature for isFeatureSupported(String). This feature covers ServiceWorkerWebSettingsCompat#getBlockNetworkLoads(), and ServiceWorkerWebSettingsCompat#setBlockNetworkLoads(boolean).

Value: Features.SERVICE_WORKER_BLOCK_NETWORK_LOADS

SERVICE_WORKER_SHOULD_INTERCEPT_REQUEST

static val SERVICE_WORKER_SHOULD_INTERCEPT_REQUEST: String

Feature for isFeatureSupported(String). This feature covers ServiceWorkerClientCompat#shouldInterceptRequest(WebResourceRequest).

Value: Features.SERVICE_WORKER_SHOULD_INTERCEPT_REQUEST

RECEIVE_WEB_RESOURCE_ERROR

static val RECEIVE_WEB_RESOURCE_ERROR: String

Feature for isFeatureSupported(String). This feature covers WebViewClientCompat#onReceivedError(android.webkit.WebView, WebResourceRequest, * WebResourceErrorCompat).

Value: Features.RECEIVE_WEB_RESOURCE_ERROR

RECEIVE_HTTP_ERROR

static val RECEIVE_HTTP_ERROR: String

Feature for isFeatureSupported(String). This feature covers WebViewClientCompat#onReceivedHttpError(android.webkit.WebView, WebResourceRequest, * WebResourceResponse).

Value: Features.RECEIVE_HTTP_ERROR

SHOULD_OVERRIDE_WITH_REDIRECTS

static val SHOULD_OVERRIDE_WITH_REDIRECTS: String

Feature for isFeatureSupported(String). This feature covers WebViewClientCompat#shouldOverrideUrlLoading(android.webkit.WebView, * WebResourceRequest).

Value: Features.SHOULD_OVERRIDE_WITH_REDIRECTS

SAFE_BROWSING_HIT

static val SAFE_BROWSING_HIT: String

Feature for isFeatureSupported(String). This feature covers WebViewClientCompat#onSafeBrowsingHit(android.webkit.WebView, * WebResourceRequest, int, SafeBrowsingResponseCompat).

Value: Features.SAFE_BROWSING_HIT

WEB_RESOURCE_REQUEST_IS_REDIRECT

static val WEB_RESOURCE_REQUEST_IS_REDIRECT: String

Feature for isFeatureSupported(String). This feature covers WebResourceRequestCompat#isRedirect(WebResourceRequest).

Value: Features.WEB_RESOURCE_REQUEST_IS_REDIRECT

WEB_RESOURCE_ERROR_GET_DESCRIPTION

static val WEB_RESOURCE_ERROR_GET_DESCRIPTION: String

Feature for isFeatureSupported(String). This feature covers WebResourceErrorCompat#getDescription().

Value: Features.WEB_RESOURCE_ERROR_GET_DESCRIPTION

WEB_RESOURCE_ERROR_GET_CODE

static val WEB_RESOURCE_ERROR_GET_CODE: String

Feature for isFeatureSupported(String). This feature covers WebResourceErrorCompat#getErrorCode().

Value: Features.WEB_RESOURCE_ERROR_GET_CODE

SAFE_BROWSING_RESPONSE_BACK_TO_SAFETY

static val SAFE_BROWSING_RESPONSE_BACK_TO_SAFETY: String

Feature for isFeatureSupported(String). This feature covers SafeBrowsingResponseCompat#backToSafety(boolean).

Value: Features.SAFE_BROWSING_RESPONSE_BACK_TO_SAFETY

SAFE_BROWSING_RESPONSE_PROCEED

static val SAFE_BROWSING_RESPONSE_PROCEED: String

Feature for isFeatureSupported(String). This feature covers SafeBrowsingResponseCompat#proceed(boolean).

Value: Features.SAFE_BROWSING_RESPONSE_PROCEED

SAFE_BROWSING_RESPONSE_SHOW_INTERSTITIAL

static val SAFE_BROWSING_RESPONSE_SHOW_INTERSTITIAL: String

Feature for isFeatureSupported(String). This feature covers SafeBrowsingResponseCompat#showInterstitial(boolean).

Value: Features.SAFE_BROWSING_RESPONSE_SHOW_INTERSTITIAL

WEB_MESSAGE_PORT_POST_MESSAGE

static val WEB_MESSAGE_PORT_POST_MESSAGE: String

Feature for isFeatureSupported(String). This feature covers androidx.webkit.WebMessagePortCompat#postMessage(WebMessageCompat).

Value: Features.WEB_MESSAGE_PORT_POST_MESSAGE

WEB_MESSAGE_PORT_CLOSE

static val WEB_MESSAGE_PORT_CLOSE: String

Feature for isFeatureSupported(String). This feature covers androidx.webkit.WebMessagePortCompat#close().

Value: Features.WEB_MESSAGE_PORT_CLOSE

WEB_MESSAGE_PORT_SET_MESSAGE_CALLBACK

static val WEB_MESSAGE_PORT_SET_MESSAGE_CALLBACK: String

Feature for isFeatureSupported(String). This feature covers androidx.webkit.WebMessagePortCompat#setWebMessageCallback( * WebMessagePortCompat.WebMessageCallbackCompat), and androidx.webkit.WebMessagePortCompat#setWebMessageCallback(Handler, * WebMessagePortCompat.WebMessageCallbackCompat).

Value: Features.WEB_MESSAGE_PORT_SET_MESSAGE_CALLBACK

CREATE_WEB_MESSAGE_CHANNEL

static val CREATE_WEB_MESSAGE_CHANNEL: String

Feature for isFeatureSupported(String). This feature covers WebViewCompat#createWebMessageChannel(WebView).

Value: Features.CREATE_WEB_MESSAGE_CHANNEL

POST_WEB_MESSAGE

static val POST_WEB_MESSAGE: String

Feature for isFeatureSupported(String). This feature covers WebViewCompat#postWebMessage(WebView, WebMessageCompat, Uri).

Value: Features.POST_WEB_MESSAGE

WEB_MESSAGE_CALLBACK_ON_MESSAGE

static val WEB_MESSAGE_CALLBACK_ON_MESSAGE: String

Feature for isFeatureSupported(String). This feature covers WebMessagePortCompat.WebMessageCallbackCompat#onMessage(WebMessagePortCompat, * WebMessageCompat).

Value: Features.WEB_MESSAGE_CALLBACK_ON_MESSAGE

Public methods

isFeatureSupported

open static fun isFeatureSupported(@NonNull feature: String): Boolean

Return whether a feature is supported at run-time. On devices running Android version and higher, this will check whether a feature is supported, depending on the combination of the desired feature, the Android version of device, and the WebView APK on the device. If running on a device with a lower API level, this will always return false.

Note: If this method returns false, it is not safe to invoke the methods requiring the desired feature. Furthermore, if this method returns false for a particular feature, any callback guarded by that feature will not be invoked.

Parameters
`feature`	String: the feature to be checked

Return
Boolean: whether the feature is supported given the current platform SDK and webview version