Added in API level 1

WebView


open class WebView : AbsoluteLayout, ViewTreeObserver.OnGlobalFocusChangeListener, ViewGroup.OnHierarchyChangeListener
kotlin.Any
   ↳ android.view.View
   ↳ android.view.ViewGroup
   ↳ android.widget.AbsoluteLayout
   ↳ android.webkit.WebView

A View that displays web pages.

Basic usage

In most cases, we recommend using a standard web browser, like Chrome, to deliver content to the user. To learn more about web browsers, read the guide on invoking a browser with an intent.

WebView objects allow you to display web content as part of your activity layout, but lack some of the features of fully-developed browsers. A WebView is useful when you need increased control over the UI and advanced configuration options that will allow you to embed web pages in a specially-designed environment for your app.

To learn more about WebView and alternatives for serving web content, read the documentation on Web-based content.

Summary

Nested classes
abstract

Interface to listen for find results.

open

abstract

Interface to listen for new pictures as they change.

abstract

Callback interface supplied to postVisualStateCallback for receiving notifications about the visual state.

open

Transportation object for returning WebView across thread boundaries.

Inherited XML attributes
Constants
static Int

The renderer associated with this WebView is bound with the default priority for services.

static Int

The renderer associated with this WebView is bound with Context#BIND_IMPORTANT.

static Int

The renderer associated with this WebView is bound with Context#BIND_WAIVE_PRIORITY.

static String

URI scheme for map address.

static String

URI scheme for email address.

static String

URI scheme for telephone number.

Inherited constants
Public constructors
WebView(context: Context)

Constructs a new WebView with an Activity Context object.

WebView(context: Context, attrs: AttributeSet?)

Constructs a new WebView with layout parameters.

WebView(context: Context, attrs: AttributeSet?, defStyleAttr: Int)

Constructs a new WebView with layout parameters and a default style.

WebView(context: Context, attrs: AttributeSet?, defStyleAttr: Int, defStyleRes: Int)

Constructs a new WebView with layout parameters and a default style.

WebView(context: Context, attrs: AttributeSet?, defStyleAttr: Int, privateBrowsing: Boolean)

Constructs a new WebView with layout parameters and a default style.

Public methods
open Unit

Injects the supplied Java object into this WebView.

open Unit

open Boolean

Gets whether this WebView has a back history item.

open Boolean

Gets whether the page can go back or forward the given number of steps.

open Boolean

Gets whether this WebView has a forward history item.

open Boolean

Gets whether this WebView can be zoomed in.

open Boolean

Gets whether this WebView can be zoomed out.

open Picture!

Gets a new picture that captures the current contents of this WebView.

open Unit
clearCache(includeDiskFiles: Boolean)

Clears the resource cache.

open static Unit

Clears the client certificate preferences stored in response to proceeding/cancelling client cert requests.

open Unit

Removes the autocomplete popup from the currently focused form field, if present.

open Unit

Tells this WebView to clear its internal back/forward list.

open Unit

Clears the highlighting surrounding text matches created by findAllAsync.

open Unit

Clears the SSL preferences table stored in response to proceeding with SSL certificate errors.

open Unit

Clears this WebView so that onDraw() will draw nothing but white background, and onMeasure() will return 0 if MeasureSpec is not MeasureSpec.

open Unit

open WebBackForwardList

Gets the WebBackForwardList for this WebView.

open PrintDocumentAdapter!

open PrintDocumentAdapter

Creates a PrintDocumentAdapter that provides the content of this WebView for printing.

open Array<WebMessagePort!>

Creates a message channel to communicate with JS and returns the message ports that represent the endpoints of this message channel.

open Unit

Destroys the internal state of this WebView.

open static Unit

Indicate that the current process does not intend to use WebView, and that an exception should be thrown if a WebView is created or any other methods in the android.

open Unit

Dispatch to collect the ViewTranslationRequests for translation purpose by traversing the hierarchy when the app requests ui translation.

open Boolean

open Unit

Queries the document to see if it contains any image references.

open static Unit

For apps targeting the L release, WebView has a new default behavior that reduces memory footprint and increases performance by intelligently choosing the portion of the HTML document that needs to be drawn.

open Unit
evaluateJavascript(script: String, resultCallback: ValueCallback<String!>?)

Asynchronously evaluates JavaScript in the context of the currently displayed page.

open static String?

Gets the first substring which appears to be the address of a physical location.

open Int
findAll(find: String!)

Finds all instances of find on the page and highlights them.

open Unit

Finds all instances of find on the page and highlights them, asynchronously.

open View!

open Unit
findNext(forward: Boolean)

Highlights and scrolls to the next match found by findAllAsync, wrapping around page boundaries as necessary.

open Unit
flingScroll(vx: Int, vy: Int)

open Unit

Informs this WebView that memory is low so that it can free any available memory.

open CharSequence!

open AccessibilityNodeProvider!

open SslCertificate?

Gets the SSL certificate for the main top-level page or null if there is no certificate (the site is not secure).

open Int

Gets the height of the HTML content.

open static PackageInfo?

If WebView has already been loaded into the current process this method will return the package that was used to load it.

open Bitmap?

Gets the favicon for the current page.

open Handler!

open WebView.HitTestResult

Gets a HitTestResult based on the current cursor node.

open Array<String!>?

Retrieves HTTP authentication credentials for a given host and realm from the WebViewDatabase instance.

open String?

Gets the original URL for the current page.

open Int

Gets the progress for the current page.

open Boolean

Return whether this WebView requests a priority of RENDERER_PRIORITY_WAIVED when not visible.

open Int

Get the requested renderer priority for this WebView.

open static Uri

Returns a URL pointing to the privacy policy for Safe Browsing reporting.

open Float

Gets the current scale of this WebView.

open WebSettings

Gets the WebSettings object used to control the settings for this WebView.

open TextClassifier

Returns the TextClassifier used by this WebView.

open String?

Gets the title for the current page.

open String?

Gets the URL for the current page.

open WebChromeClient?

Gets the chrome handler.

open static ClassLoader

Returns the ClassLoader used to load internal WebView classes.

open WebViewClient

Gets the WebViewClient.

open Looper

Returns the Looper corresponding to the thread on which WebView calls must be made.

open WebViewRenderProcess?

Gets a handle to the WebView renderer process associated with this WebView.

open WebViewRenderProcessClient?

Gets the renderer client object associated with this WebView.

open Unit

Goes back in the history of this WebView.

open Unit

Goes to the history item that is the number of steps away from the current item.

open Unit

Goes forward in the history of this WebView.

open Unit

Invokes the graphical zoom picker widget for this WebView.

open Boolean

Gets whether private browsing is enabled in this WebView.

open Boolean

open Unit
loadData(data: String, mimeType: String?, encoding: String?)

Loads the given data into this WebView using a 'data' scheme URL.

open Unit
loadDataWithBaseURL(baseUrl: String?, data: String, mimeType: String?, encoding: String?, historyUrl: String?)

Loads the given data into this WebView, using baseUrl as the base URL for the content.

open Unit
loadUrl(url: String, additionalHttpHeaders: MutableMap<String!, String!>)

Loads the given URL with additional HTTP headers, specified as a map from name to value.

open Unit

Loads the given URL.

open WindowInsets!

open Boolean

open Unit
onChildViewAdded(parent: View!, child: View!)

open Unit
onChildViewRemoved(p: View!, child: View!)

open InputConnection!

Creates a new InputConnection for an InputMethod to interact with the WebView.

open Unit
onCreateVirtualViewTranslationRequests(virtualIds: LongArray, supportedFormats: IntArray, requestsCollector: Consumer<ViewTranslationRequest!>)

Collects ViewTranslationRequests which represents the content to be translated for the virtual views in the host view.

open Boolean

open Unit

open Boolean

open Unit
onGlobalFocusChanged(oldFocus: View!, newFocus: View!)

open Boolean

open Boolean
onKeyDown(keyCode: Int, event: KeyEvent!)

open Boolean
onKeyMultiple(keyCode: Int, repeatCount: Int, event: KeyEvent!)

open Boolean
onKeyUp(keyCode: Int, event: KeyEvent!)

open Unit

Does a best-effort attempt to pause any processing that can be paused safely, such as animations and geolocation.

open Unit

Populates a ViewStructure containing virtual children to fullfil an autofill request.

open Unit

Populates a ViewStructure for content capture.

open Unit

open PointerIcon?
onResolvePointerIcon(event: MotionEvent, pointerIndex: Int)

Resolve the pointer icon that should be used for specified pointer in the motion event.

open Unit

Resumes a WebView after a previous call to onPause.

open Unit

open Boolean

open Boolean

open Unit

Called when the content from View#onCreateVirtualViewTranslationRequests had been translated by the TranslationService.

open Unit
onWindowFocusChanged(hasWindowFocus: Boolean)

open Boolean

Gets whether horizontal scrollbar has overlay style.

open Boolean

Gets whether vertical scrollbar has overlay style.

open Boolean
pageDown(bottom: Boolean)

Scrolls the contents of this WebView down by half the page size.

open Boolean

Scrolls the contents of this WebView up by half the view size.

open Unit

Pauses all layout, parsing, and JavaScript timers for all WebViews.

open Boolean

open Unit
postUrl(url: String, postData: ByteArray)

Loads the URL with postData using "POST" method into this WebView.

open Unit

Posts a VisualStateCallback, which will be called when the current state of the WebView is ready to be drawn.

open Unit
postWebMessage(message: WebMessage, targetOrigin: Uri)

Post a message to main frame.

open Unit

Reloads the current URL.

open Unit

Removes a previously injected Java object from this WebView.

open Boolean
requestChildRectangleOnScreen(child: View, rect: Rect!, immediate: Boolean)

open Boolean
requestFocus(direction: Int, previouslyFocusedRect: Rect!)

open Unit

Requests the anchor or image element URL at the last tapped point.

open Unit

Requests the URL of the image last touched by the user.

open WebBackForwardList?
restoreState(inState: Bundle)

Restores the state of this WebView from the given Bundle.

open Unit

Resumes all layout, parsing, and JavaScript timers for all WebViews.

open Unit
savePassword(host: String!, username: String!, password: String!)

Sets a username and password pair for the specified host.

open WebBackForwardList?
saveState(outState: Bundle)

Saves the state of this WebView used in android.

open Unit

Saves the current view as a web archive.

open Unit
saveWebArchive(basename: String, autoname: Boolean, callback: ValueCallback<String!>?)

Saves the current view as a web archive.

open Unit

open Unit

Sets the SSL certificate for the main top-level page.

open static Unit

Define the directory used to store WebView data for the current process.

open Unit

Registers the interface to be used when content can not be handled by the rendering engine, and should be downloaded instead.

open Unit

Registers the listener to be notified as find-on-page operations progress.

open Unit

Specifies whether the horizontal scrollbar has overlay style.

open Unit
setHttpAuthUsernamePassword(host: String!, realm: String!, username: String!, password: String!)

Stores HTTP authentication credentials for a given host and realm to the WebViewDatabase instance.

open Unit
setInitialScale(scaleInPercent: Int)

Sets the initial scale for this WebView.

open Unit
setLayerType(layerType: Int, paint: Paint?)

open Unit

open Unit

open Unit

Informs WebView of the network state.

open Unit

open Unit

Sets the Picture listener.

open Unit
setRendererPriorityPolicy(rendererRequestedPriority: Int, waivedWhenNotVisible: Boolean)

Set the renderer priority policy for this WebView.

open static Unit

Sets the list of hosts (domain names/IP addresses) that are exempt from SafeBrowsing checks.

open Unit

open Unit

Sets the TextClassifier for this WebView.

open Unit

Specifies whether the vertical scrollbar has overlay style.

open Unit

Sets the chrome handler.

open static Unit

Enables debugging of web contents (HTML / CSS / JavaScript) loaded into any WebViews of this application.

open Unit

Sets the WebViewClient that will receive various notifications and requests.

open Unit
setWebViewRenderProcessClient(executor: Executor, webViewRenderProcessClient: WebViewRenderProcessClient)

Sets the renderer client object associated with this WebView.

open Unit

Sets the renderer client object associated with this WebView.

open Boolean

open Boolean
showFindDialog(text: String?, showIme: Boolean)

Starts an ActionMode for finding text in this WebView.

open static Unit

Starts Safe Browsing initialization.

open Unit

Stops the current load.

open Unit
zoomBy(zoomFactor: Float)

Performs a zoom operation in this WebView.

open Boolean

Performs zoom in in this WebView.

open Boolean

Performs zoom out in this WebView.

Protected methods
open Int

open Int

open Int

open Int

open Int

open Unit

open Unit

open Unit

open Unit
onDraw(canvas: Canvas)

open Unit
onFocusChanged(focused: Boolean, direction: Int, previouslyFocusedRect: Rect?)

open Unit
onMeasure(widthMeasureSpec: Int, heightMeasureSpec: Int)

open Unit
onOverScrolled(scrollX: Int, scrollY: Int, clampedX: Boolean, clampedY: Boolean)

open Unit
onScrollChanged(l: Int, t: Int, oldl: Int, oldt: Int)

open Unit
onSizeChanged(w: Int, h: Int, ow: Int, oh: Int)

open Unit
onVisibilityChanged(changedView: View, visibility: Int)

open Unit

Inherited functions
Inherited properties

Constants

RENDERER_PRIORITY_BOUND

Added in API level 26
static val RENDERER_PRIORITY_BOUND: Int

The renderer associated with this WebView is bound with the default priority for services. Use with setRendererPriorityPolicy.

Value: 1

RENDERER_PRIORITY_IMPORTANT

Added in API level 26
static val RENDERER_PRIORITY_IMPORTANT: Int

The renderer associated with this WebView is bound with Context#BIND_IMPORTANT. Use with setRendererPriorityPolicy.

Value: 2

RENDERER_PRIORITY_WAIVED

Added in API level 26
static val RENDERER_PRIORITY_WAIVED: Int

The renderer associated with this WebView is bound with Context#BIND_WAIVE_PRIORITY. At this priority level WebView renderers will be strong targets for out of memory killing. Use with setRendererPriorityPolicy.

Value: 0

SCHEME_GEO

Added in API level 1
static val SCHEME_GEO: String

URI scheme for map address.

Value: "geo:0,0?q="

SCHEME_MAILTO

Added in API level 1
static val SCHEME_MAILTO: String

URI scheme for email address.

Value: "mailto:"

SCHEME_TEL

Added in API level 1
static val SCHEME_TEL: String

URI scheme for telephone number.

Value: "tel:"

Public constructors

WebView

Added in API level 1
WebView(context: Context)

Constructs a new WebView with an Activity Context object.

Note: WebView should always be instantiated with an Activity Context. If instantiated with an Application Context, WebView will be unable to provide several features, such as JavaScript dialogs and autofill.

Parameters
context Context: an Activity Context to access application assets This value cannot be null.

WebView

Added in API level 1
WebView(
    context: Context,
    attrs: AttributeSet?)

Constructs a new WebView with layout parameters.

Parameters
context Context: an Activity Context to access application assets This value cannot be null.
attrs AttributeSet?: an AttributeSet passed to our parent This value may be null.

WebView

Added in API level 1
WebView(
    context: Context,
    attrs: AttributeSet?,
    defStyleAttr: Int)

Constructs a new WebView with layout parameters and a default style.

Parameters
context Context: an Activity Context to access application assets This value cannot be null.
attrs AttributeSet?: an AttributeSet passed to our parent This value may be null.
defStyleAttr Int: an attribute in the current theme that contains a reference to a style resource that supplies default values for the view. Can be 0 to not look for defaults.

WebView

Added in API level 21
WebView(
    context: Context,
    attrs: AttributeSet?,
    defStyleAttr: Int,
    defStyleRes: Int)

Constructs a new WebView with layout parameters and a default style.

Parameters
context Context: an Activity Context to access application assets This value cannot be null.
attrs AttributeSet?: an AttributeSet passed to our parent This value may be null.
defStyleAttr Int: an attribute in the current theme that contains a reference to a style resource that supplies default values for the view. Can be 0 to not look for defaults.
defStyleRes Int: a resource identifier of a style resource that supplies default values for the view, used only if defStyleAttr is 0 or can not be found in the theme. Can be 0 to not look for defaults.

WebView

Added in API level 11
WebView(
    context: Context,
    attrs: AttributeSet?,
    defStyleAttr: Int,
    privateBrowsing: Boolean)

Deprecated: Private browsing is no longer supported directly via WebView and will be removed in a future release. Prefer using WebSettings, WebViewDatabase, CookieManager and WebStorage for fine-grained control of privacy data.

Constructs a new WebView with layout parameters and a default style.

Parameters
context Context: an Activity Context to access application assets This value cannot be null.
attrs AttributeSet?: an AttributeSet passed to our parent This value may be null.
defStyleAttr Int: an attribute in the current theme that contains a reference to a style resource that supplies default values for the view. Can be 0 to not look for defaults.
privateBrowsing Boolean: whether this WebView will be initialized in private mode

Public methods

addJavascriptInterface

Added in API level 1
open fun addJavascriptInterface(
    object: Any,
    name: String
): Unit

Injects the supplied Java object into this WebView. The object is injected into all frames of the web page, including all the iframes, using the supplied name. This allows the Java object's methods to be accessed from JavaScript. For applications targeted to API level android.os.Build.VERSION_CODES#JELLY_BEAN_MR1 and above, only public methods that are annotated with android.webkit.JavascriptInterface can be accessed from JavaScript. For applications targeted to API level android.os.Build.VERSION_CODES#JELLY_BEAN or below, all public methods (including the inherited ones) can be accessed, see the important security note below for implications.

Note that injected objects will not appear in JavaScript until the page is next (re)loaded. JavaScript should be enabled before injecting the object. For example:

class JsObject {
     @JavascriptInterface
     public String toString() { return "injectedObject"; }
  }
  webview.getSettings().setJavaScriptEnabled(true);
  webView.addJavascriptInterface(new JsObject(), "injectedObject");
  webView.loadData("<title></title>", "text/html", null);
  webView.loadUrl("javascript:alert(injectedObject.toString())");

IMPORTANT:

  • This method can be used to allow JavaScript to control the host application. This is a powerful feature, but also presents a security risk for apps targeting android.os.Build.VERSION_CODES#JELLY_BEAN or earlier. Apps that target a version later than android.os.Build.VERSION_CODES#JELLY_BEAN are still vulnerable if the app runs on a device running Android earlier than 4.2. The most secure way to use this method is to target android.os.Build.VERSION_CODES#JELLY_BEAN_MR1 and to ensure the method is called only when running on Android 4.2 or later. With these older versions, JavaScript could use reflection to access an injected object's public fields. Use of this method in a WebView containing untrusted content could allow an attacker to manipulate the host application in unintended ways, executing Java code with the permissions of the host application. Use extreme care when using this method in a WebView which could contain untrusted content.
  • JavaScript interacts with Java object on a private, background thread of this WebView. Care is therefore required to maintain thread safety.
  • Because the object is exposed to all the frames, any frame could obtain the object name and call methods on it. There is no way to tell the calling frame's origin from the app side, so the app must not assume that the caller is trustworthy unless the app can guarantee that no third party content is ever loaded into the WebView even inside an iframe.
  • The Java object's fields are not accessible.
  • For applications targeted to API level android.os.Build.VERSION_CODES#LOLLIPOP and above, methods of injected Java objects are enumerable from JavaScript.
Parameters
object Any: the Java object to inject into this WebView's JavaScript context. null values are ignored.
name String: the name used to expose the object in JavaScript This value cannot be null.

autofill

Added in API level 26
open fun autofill(values: SparseArray<AutofillValue!>): Unit
Parameters
values SparseArray<AutofillValue!>: map of values to be autofilled, keyed by virtual child id. This value cannot be null.

canGoBack

Added in API level 1
open fun canGoBack(): Boolean

Gets whether this WebView has a back history item.

Return
Boolean true if this WebView has a back history item

canGoBackOrForward

Added in API level 1
open fun canGoBackOrForward(steps: Int): Boolean

Gets whether the page can go back or forward the given number of steps.

Parameters
steps Int: the negative or positive number of steps to move the history

canGoForward

Added in API level 1
open fun canGoForward(): Boolean

Gets whether this WebView has a forward history item.

Return
Boolean true if this WebView has a forward history item

canZoomIn

Added in API level 11
Deprecated in API level 17
open fun canZoomIn(): Boolean

Deprecated: This method is prone to inaccuracy due to race conditions between the web rendering and UI threads; prefer WebViewClient#onScaleChanged.

Gets whether this WebView can be zoomed in.

Return
Boolean true if this WebView can be zoomed in

canZoomOut

Added in API level 11
Deprecated in API level 17
open fun canZoomOut(): Boolean

Deprecated: This method is prone to inaccuracy due to race conditions between the web rendering and UI threads; prefer WebViewClient#onScaleChanged.

Gets whether this WebView can be zoomed out.

Return
Boolean true if this WebView can be zoomed out

capturePicture

Added in API level 1
Deprecated in API level 19
open fun capturePicture(): Picture!

Deprecated: Use onDraw to obtain a bitmap snapshot of the WebView, or #saveWebArchive to save the content to a file.

Gets a new picture that captures the current contents of this WebView. The picture is of the entire document being displayed, and is not limited to the area currently displayed by this WebView. Also, the picture is a static copy and is unaffected by later changes to the content being displayed.

Note that due to internal changes, for API levels between android.os.Build.VERSION_CODES#HONEYCOMB and android.os.Build.VERSION_CODES#ICE_CREAM_SANDWICH inclusive, the picture does not include fixed position elements or scrollable divs.

Note that from android.os.Build.VERSION_CODES#JELLY_BEAN_MR1 the returned picture should only be drawn into bitmap-backed Canvas - using any other type of Canvas will involve additional conversion at a cost in memory and performance.

Return
Picture! a picture that captures the current contents of this WebView

clearCache

Added in API level 1
open fun clearCache(includeDiskFiles: Boolean): Unit

Clears the resource cache. Note that the cache is per-application, so this will clear the cache for all WebViews used.

Parameters
includeDiskFiles Boolean: if false, only the RAM cache is cleared

clearClientCertPreferences

Added in API level 21
open static fun clearClientCertPreferences(onCleared: Runnable?): Unit

Clears the client certificate preferences stored in response to proceeding/cancelling client cert requests. Note that WebView automatically clears these preferences when the system keychain is updated. The preferences are shared by all the WebViews that are created by the embedder application.

Parameters
onCleared Runnable?: A runnable to be invoked when client certs are cleared. The runnable will be called in UI thread. This value may be null.

clearFormData

Added in API level 1
open fun clearFormData(): Unit

Removes the autocomplete popup from the currently focused form field, if present. Note this only affects the display of the autocomplete popup, it does not remove any saved form data from this WebView's store. To do that, use WebViewDatabase#clearFormData.

clearHistory

Added in API level 1
open fun clearHistory(): Unit

Tells this WebView to clear its internal back/forward list.

clearMatches

Added in API level 3
open fun clearMatches(): Unit

Clears the highlighting surrounding text matches created by findAllAsync.

clearSslPreferences

Added in API level 1
open fun clearSslPreferences(): Unit

Clears the SSL preferences table stored in response to proceeding with SSL certificate errors.

clearView

Added in API level 1
Deprecated in API level 18
open fun clearView(): Unit

Deprecated: Use WebView.loadUrl("about:blank") to reliably reset the view state and release page resources (including any running JavaScript).

Clears this WebView so that onDraw() will draw nothing but white background, and onMeasure() will return 0 if MeasureSpec is not MeasureSpec.EXACTLY.

computeScroll

Added in API level 1
open fun computeScroll(): Unit

copyBackForwardList

Added in API level 1
open fun copyBackForwardList(): WebBackForwardList

Gets the WebBackForwardList for this WebView. This contains the back/forward list for use in querying each item in the history stack. This is a copy of the private WebBackForwardList so it contains only a snapshot of the current state. Multiple calls to this method may return different objects. The object returned from this method will not be updated to reflect any new state.

Return
WebBackForwardList This value cannot be null.

createPrintDocumentAdapter

Added in API level 19
Deprecated in API level 21
open fun createPrintDocumentAdapter(): PrintDocumentAdapter!

Deprecated: Use createPrintDocumentAdapter(java.lang.String) which requires user to provide a print document name.

createPrintDocumentAdapter

Added in API level 21
open fun createPrintDocumentAdapter(documentName: String): PrintDocumentAdapter

Creates a PrintDocumentAdapter that provides the content of this WebView for printing. The adapter works by converting the WebView contents to a PDF stream. The WebView cannot be drawn during the conversion process - any such draws are undefined. It is recommended to use a dedicated off screen WebView for the printing. If necessary, an application may temporarily hide a visible WebView by using a custom PrintDocumentAdapter instance wrapped around the object returned and observing the onStart and onFinish methods. See android.print.PrintDocumentAdapter for more information.

Parameters
documentName String: The user-facing name of the printed document. See android.print.PrintDocumentInfo This value cannot be null.
Return
PrintDocumentAdapter This value cannot be null.

createWebMessageChannel

Added in API level 23
open fun createWebMessageChannel(): Array<WebMessagePort!>

Creates a message channel to communicate with JS and returns the message ports that represent the endpoints of this message channel. The HTML5 message channel functionality is described here

The returned message channels are entangled and already in started state.

Return
Array<WebMessagePort!> the two message ports that form the message channel. This value cannot be null.

destroy

Added in API level 1
open fun destroy(): Unit

Destroys the internal state of this WebView. This method should be called after this WebView has been removed from the view system. No other methods may be called on this WebView after destroy.

disableWebView

Added in API level 28
open static fun disableWebView(): Unit

Indicate that the current process does not intend to use WebView, and that an exception should be thrown if a WebView is created or any other methods in the android.webkit package are used.

Applications with multiple processes may wish to call this in processes that are not intended to use WebView to avoid accidentally incurring the memory usage of initializing WebView in long-lived processes that have no need for it, and to prevent potential data directory conflicts (see setDataDirectorySuffix).

For example, an audio player application with one process for its activities and another process for its playback service may wish to call this method in the playback service's android.app.Service#onCreate.

Exceptions
java.lang.IllegalStateException if WebView has already been initialized in the current process.

dispatchCreateViewTranslationRequest

Added in API level 31
open fun dispatchCreateViewTranslationRequest(
    viewIds: MutableMap<AutofillId!, LongArray!>,
    supportedFormats: IntArray,
    capability: TranslationCapability?,
    requests: MutableList<ViewTranslationRequest!>
): Unit

Dispatch to collect the ViewTranslationRequests for translation purpose by traversing the hierarchy when the app requests ui translation. Typically, this method should only be overridden by subclasses that provide a view hierarchy (such as ViewGroup). Other classes should override View#onCreateViewTranslationRequest for normal view or override View#onVirtualViewTranslationResponses for view contains virtual children. When requested to start the ui translation, the system will call this method to traverse the view hierarchy to collect ViewTranslationRequests and create a android.view.translation.Translator to translate the requests. All the ViewTranslationRequests must be added when the traversal is done.

The default implementation calls View#onCreateViewTranslationRequest for normal view or calls View#onVirtualViewTranslationResponses for view contains virtual children to build ViewTranslationRequest if the view should be translated. The view is marked as having transient state so that recycling of views doesn't prevent the system from attaching the response to it. Therefore, if overriding this method, you should set or reset the transient state.

The implementation calls dispatchCreateViewTranslationRequest for all the child views.
Parameters
viewIds MutableMap<AutofillId!, LongArray!>: This value cannot be null.
supportedFormats IntArray: This value cannot be null. Value is android.view.translation.TranslationSpec#DATA_FORMAT_TEXT
capability TranslationCapability?: This value may be null.
requests MutableList<ViewTranslationRequest!>: This value cannot be null.

dispatchKeyEvent

Added in API level 1
open fun dispatchKeyEvent(event: KeyEvent!): Boolean
Parameters
event KeyEvent!: The key event to be dispatched.
Return
Boolean True if the event was handled, false otherwise.

documentHasImages

Added in API level 1
open fun documentHasImages(response: Message): Unit

Queries the document to see if it contains any image references. The message object will be dispatched with arg1 being set to 1 if images were found and 0 if the document does not reference any images.

Parameters
response Message: the message that will be dispatched with the result This value cannot be null.

enableSlowWholeDocumentDraw

Added in API level 21
open static fun enableSlowWholeDocumentDraw(): Unit

For apps targeting the L release, WebView has a new default behavior that reduces memory footprint and increases performance by intelligently choosing the portion of the HTML document that needs to be drawn. These optimizations are transparent to the developers. However, under certain circumstances, an App developer may want to disable them:

  1. When an app uses onDraw to do own drawing and accesses portions of the page that is way outside the visible portion of the page.
  2. When an app uses capturePicture to capture a very large HTML document. Note that capturePicture is a deprecated API.
Enabling drawing the entire HTML document has a significant performance cost. This method should be called before any WebViews are created.

evaluateJavascript

Added in API level 19
open fun evaluateJavascript(
    script: String,
    resultCallback: ValueCallback<String!>?
): Unit

Asynchronously evaluates JavaScript in the context of the currently displayed page. If non-null, resultCallback will be invoked with any result returned from that execution. This method must be called on the UI thread and the callback will be made on the UI thread.

Compatibility note. Applications targeting android.os.Build.VERSION_CODES#N or later, JavaScript state from an empty WebView is no longer persisted across navigations like loadUrl(java.lang.String). For example, global variables and functions defined before calling loadUrl(java.lang.String) will not exist in the loaded page. Applications should use addJavascriptInterface instead to persist JavaScript objects across navigations.

Parameters
script String: the JavaScript to execute. This value cannot be null.
resultCallback ValueCallback<String!>?: A callback to be invoked when the script execution completes with the result of the execution (if any). May be null if no notification of the result is required.

findAddress

Added in API level 1
Deprecated in API level 28
open static fun findAddress(addr: String!): String?

Deprecated: This method is superseded by TextClassifier#generateLinks(. Avoid using this method even when targeting API levels where no alternative is available.

Gets the first substring which appears to be the address of a physical location. Only addresses in the United States can be detected, which must consist of:

  • a house number
  • a street name
  • a street type (Road, Circle, etc), either spelled out or abbreviated
  • a city name
  • a state or territory, either spelled out or two-letter abbr
  • an optional 5 digit or 9 digit zip code
All names must be correctly capitalized, and the zip code, if present, must be valid for the state. The street type must be a standard USPS spelling or abbreviation. The state or territory must also be spelled or abbreviated using USPS standards. The house number may not exceed five digits.

Note: This function is deprecated and should be avoided on all API levels, as it cannot detect addresses outside of the United States and has a high rate of false positives. On API level android.os.Build.VERSION_CODES#O_MR1 and earlier, it also causes the entire WebView implementation to be loaded and initialized, which can throw android.util.AndroidRuntimeException or other exceptions if the WebView implementation is currently being updated.

Parameters
addr String!: the string to search for addresses
Return
String? the address, or if no address is found, null

findAll

Added in API level 3
Deprecated in API level 16
open fun findAll(find: String!): Int

Deprecated: findAllAsync is preferred.

Finds all instances of find on the page and highlights them. Notifies any registered FindListener.

Parameters
find String!: the string to find
Return
Int the number of occurrences of the String "find" that were found

See Also

findAllAsync

Added in API level 16
open fun findAllAsync(find: String): Unit

Finds all instances of find on the page and highlights them, asynchronously. Notifies any registered FindListener. Successive calls to this will cancel any pending searches.

Parameters
find String: the string to find. This value cannot be null.

See Also

findFocus

Added in API level 1
open fun findFocus(): View!
Return
View! The view that currently has focus, or null if no focused view can be found.

findNext

Added in API level 3
open fun findNext(forward: Boolean): Unit

Highlights and scrolls to the next match found by findAllAsync, wrapping around page boundaries as necessary. Notifies any registered FindListener. If findAllAsync(java.lang.String) has not been called yet, or if clearMatches has been called since the last find operation, this function does nothing.

Parameters
forward Boolean: the direction to search

See Also

flingScroll

Added in API level 1
open fun flingScroll(
    vx: Int,
    vy: Int
): Unit

freeMemory

Added in API level 7
Deprecated in API level 19
open fun freeMemory(): Unit

Deprecated: Memory caches are automatically dropped when no longer needed, and in response to system memory pressure.

Informs this WebView that memory is low so that it can free any available memory.

getAccessibilityClassName

Added in API level 23
open fun getAccessibilityClassName(): CharSequence!

getAccessibilityNodeProvider

Added in API level 16
open fun getAccessibilityNodeProvider(): AccessibilityNodeProvider!
Return
AccessibilityNodeProvider! The provider.

getCertificate

Added in API level 1
open fun getCertificate(): SslCertificate?

Gets the SSL certificate for the main top-level page or null if there is no certificate (the site is not secure).

Return
SslCertificate? the SSL certificate for the main top-level page

getContentHeight

Added in API level 1
open fun getContentHeight(): Int

Gets the height of the HTML content.

Return
Int the height of the HTML content

getCurrentWebViewPackage

Added in API level 26
open static fun getCurrentWebViewPackage(): PackageInfo?

If WebView has already been loaded into the current process this method will return the package that was used to load it. Otherwise, the package that would be used if the WebView was loaded right now will be returned; this does not cause WebView to be loaded, so this information may become outdated at any time. The WebView package changes either when the current WebView package is updated, disabled, or uninstalled. It can also be changed through a Developer Setting. If the WebView package changes, any app process that has loaded WebView will be killed. The next time the app starts and loads WebView it will use the new WebView package instead.

Return
PackageInfo? the current WebView package, or null if there is none.

getFavicon

Added in API level 1
open fun getFavicon(): Bitmap?

Gets the favicon for the current page. This is the favicon of the current page until WebViewClient.onReceivedIcon is called.

Return
Bitmap? the favicon for the current page or null if the page doesn't have one or if no page has been loaded

getHandler

Added in API level 1
open fun getHandler(): Handler!
Return
Handler! A handler associated with the thread running the View. This handler can be used to pump events in the UI events queue.

getHitTestResult

Added in API level 1
open fun getHitTestResult(): WebView.HitTestResult

Gets a HitTestResult based on the current cursor node. If a HTML::a tag is found and the anchor has a non-JavaScript URL, the HitTestResult type is set to SRC_ANCHOR_TYPE and the URL is set in the "extra" field. If the anchor does not have a URL or if it is a JavaScript URL, the type will be UNKNOWN_TYPE and the URL has to be retrieved through requestFocusNodeHref asynchronously. If a HTML::img tag is found, the HitTestResult type is set to IMAGE_TYPE and the URL is set in the "extra" field. A type of SRC_IMAGE_ANCHOR_TYPE indicates an anchor with a URL that has an image as a child node. If a phone number is found, the HitTestResult type is set to PHONE_TYPE and the phone number is set in the "extra" field of HitTestResult. If a map address is found, the HitTestResult type is set to GEO_TYPE and the address is set in the "extra" field of HitTestResult. If an email address is found, the HitTestResult type is set to EMAIL_TYPE and the email is set in the "extra" field of HitTestResult. Otherwise, HitTestResult type is set to UNKNOWN_TYPE.

Return
WebView.HitTestResult This value cannot be null.

getHttpAuthUsernamePassword

Added in API level 1
Deprecated in API level 26
open fun getHttpAuthUsernamePassword(
    host: String!,
    realm: String!
): Array<String!>?

Deprecated: Use WebViewDatabase#getHttpAuthUsernamePassword instead

Retrieves HTTP authentication credentials for a given host and realm from the WebViewDatabase instance.

Parameters
host String!: the host to which the credentials apply
realm String!: the realm to which the credentials apply
Return
Array<String!>? the credentials as a String array, if found. The first element is the username and the second element is the password. null if no credentials are found.

getOriginalUrl

Added in API level 3
open fun getOriginalUrl(): String?

Gets the original URL for the current page. This is not always the same as the URL passed to WebViewClient.onPageStarted because although the load for that URL has begun, the current page may not have changed. Also, there may have been redirects resulting in a different URL to that originally requested.

Return
String? the URL that was originally requested for the current page or null if no page has been loaded

getProgress

Added in API level 1
open fun getProgress(): Int

Gets the progress for the current page.

Return
Int the progress for the current page between 0 and 100

getRendererPriorityWaivedWhenNotVisible

Added in API level 26
open fun getRendererPriorityWaivedWhenNotVisible(): Boolean

Return whether this WebView requests a priority of RENDERER_PRIORITY_WAIVED when not visible.

Return
Boolean whether this WebView requests a priority of RENDERER_PRIORITY_WAIVED when not visible.

getRendererRequestedPriority

Added in API level 26
open fun getRendererRequestedPriority(): Int

Get the requested renderer priority for this WebView.

Return
Int the requested renderer priority policy. Value is android.webkit.WebView#RENDERER_PRIORITY_WAIVED, android.webkit.WebView#RENDERER_PRIORITY_BOUND, or android.webkit.WebView#RENDERER_PRIORITY_IMPORTANT

getSafeBrowsingPrivacyPolicyUrl

Added in API level 27
open static fun getSafeBrowsingPrivacyPolicyUrl(): Uri

Returns a URL pointing to the privacy policy for Safe Browsing reporting.

Return
Uri the url pointing to a privacy policy document which can be displayed to users. This value cannot be null.

getScale

Added in API level 1
Deprecated in API level 17
open fun getScale(): Float

Deprecated: This method is prone to inaccuracy due to race conditions between the web rendering and UI threads; prefer WebViewClient#onScaleChanged.

Gets the current scale of this WebView.

Return
Float the current scale

getSettings

Added in API level 1
open fun getSettings(): WebSettings

Gets the WebSettings object used to control the settings for this WebView.

Return
WebSettings a WebSettings object that can be used to control this WebView's settings This value cannot be null.

getTextClassifier

Added in API level 27
open fun getTextClassifier(): TextClassifier

Returns the TextClassifier used by this WebView. If no TextClassifier has been set, this WebView uses the default set by the system.

Return
TextClassifier This value cannot be null.

getTitle

Added in API level 1
open fun getTitle(): String?

Gets the title for the current page. This is the title of the current page until WebViewClient.onReceivedTitle is called.

Return
String? the title for the current page or null if no page has been loaded

getUrl

Added in API level 1
open fun getUrl(): String?

Gets the URL for the current page. This is not always the same as the URL passed to WebViewClient.onPageStarted because although the load for that URL has begun, the current page may not have changed.

Return
String? the URL for the current page or null if no page has been loaded

getWebChromeClient

Added in API level 26
open fun getWebChromeClient(): WebChromeClient?

Gets the chrome handler.

Return
WebChromeClient? the WebChromeClient, or null if not yet set

getWebViewClassLoader

Added in API level 28
open static fun getWebViewClassLoader(): ClassLoader

Returns the ClassLoader used to load internal WebView classes. This method is meant for use by the WebView Support Library, there is no reason to use this method otherwise.

Return
ClassLoader This value cannot be null.

getWebViewClient

Added in API level 26
open fun getWebViewClient(): WebViewClient

Gets the WebViewClient.

Return
WebViewClient the WebViewClient, or a default client if not yet set This value cannot be null.

getWebViewLooper

Added in API level 28
open fun getWebViewLooper(): Looper

Returns the Looper corresponding to the thread on which WebView calls must be made.

Return
Looper This value cannot be null.

getWebViewRenderProcess

Added in API level 29
open fun getWebViewRenderProcess(): WebViewRenderProcess?

Gets a handle to the WebView renderer process associated with this WebView.

In android.os.Build.VERSION_CODES#O and above, WebView may run in "multiprocess" mode. In multiprocess mode, rendering of web content is performed by a sandboxed renderer process separate to the application process. This renderer process may be shared with other WebViews in the application, but is not shared with other application processes.

If WebView is running in multiprocess mode, this method returns a handle to the renderer process associated with the WebView, which can be used to control the renderer process.

Return
WebViewRenderProcess? the WebViewRenderProcess renderer handle associated with this WebView, or null if WebView is not runing in multiprocess mode.

getWebViewRenderProcessClient

Added in API level 29
open fun getWebViewRenderProcessClient(): WebViewRenderProcessClient?

Gets the renderer client object associated with this WebView.

Return
WebViewRenderProcessClient? the WebViewRenderProcessClient object associated with this WebView, if one has been set via setWebViewRenderProcessClient(android.webkit.WebViewRenderProcessClient) or null otherwise.

goBack

Added in API level 1
open fun goBack(): Unit

Goes back in the history of this WebView.

goBackOrForward

Added in API level 1
open fun goBackOrForward(steps: Int): Unit

Goes to the history item that is the number of steps away from the current item. Steps is negative if backward and positive if forward.

Parameters
steps Int: the number of steps to take back or forward in the back forward list

goForward

Added in API level 1
open fun goForward(): Unit

Goes forward in the history of this WebView.

invokeZoomPicker

Added in API level 1
open fun invokeZoomPicker(): Unit

Invokes the graphical zoom picker widget for this WebView. This will result in the zoom widget appearing on the screen to control the zoom level of this WebView.

isPrivateBrowsingEnabled

Added in API level 11
open fun isPrivateBrowsingEnabled(): Boolean

Gets whether private browsing is enabled in this WebView.

isVisibleToUserForAutofill

Added in API level 28
open fun isVisibleToUserForAutofill(virtualId: Int): Boolean
Return
Boolean Whether the view is visible on the screen.

loadData

Added in API level 1
open fun loadData(
    data: String,
    mimeType: String?,
    encoding: String?
): Unit

Loads the given data into this WebView using a 'data' scheme URL.

Note that JavaScript's same origin policy means that script running in a page loaded using this method will be unable to access content loaded using any scheme other than 'data', including 'http(s)'. To avoid this restriction, use loadDataWithBaseURL() with an appropriate base URL.

The encoding parameter specifies whether the data is base64 or URL encoded. If the data is base64 encoded, the value of the encoding parameter must be "base64". HTML can be encoded with android.util.Base64#encodeToString(byte[],int) like so:

String unencodedHtml =
      "<html><body>'%28' is the code for '('</body></html>";
  String encodedHtml = Base64.encodeToString(unencodedHtml.getBytes(), Base64.NO_PADDING);
  webView.loadData(encodedHtml, "text/html", "base64");
  

For all other values of encoding (including null) it is assumed that the data uses ASCII encoding for octets inside the range of safe URL characters and use the standard %xx hex encoding of URLs for octets outside that range. See RFC 3986 for more information. Applications targeting android.os.Build.VERSION_CODES#Q or later must either use base64 or encode any characters in the content as %23, otherwise they will be treated as the end of the content and the remaining text used as a document fragment identifier.

The mimeType parameter specifies the format of the data. If WebView can't handle the specified MIME type, it will download the data. If null, defaults to 'text/html'.

The 'data' scheme URL formed by this method uses the default US-ASCII charset. If you need to set a different charset, you should form a 'data' scheme URL which explicitly specifies a charset parameter in the mediatype portion of the URL and call loadUrl(java.lang.String) instead. Note that the charset obtained from the mediatype portion of a data URL always overrides that specified in the HTML or XML document itself.

Content loaded using this method will have a window.origin value of "null". This must not be considered to be a trusted origin by the application or by any JavaScript code running inside the WebView (for example, event sources in DOM event handlers or web messages), because malicious content can also create frames with a null origin. If you need to identify the main frame's origin in a trustworthy way, you should use loadDataWithBaseURL() with a valid HTTP or HTTPS base URL to set the origin.

Parameters
data String: a String of data in the given encoding This value cannot be null.
mimeType String?: the MIME type of the data, e.g. 'text/html'. This value may be null.
encoding String?: the encoding of the data This value may be null.

loadDataWithBaseURL

Added in API level 1
open fun loadDataWithBaseURL(
    baseUrl: String?,
    data: String,
    mimeType: String?,
    encoding: String?,
    historyUrl: String?
): Unit

Loads the given data into this WebView, using baseUrl as the base URL for the content. The base URL is used both to resolve relative URLs and when applying JavaScript's same origin policy. The historyUrl is used for the history entry.

The mimeType parameter specifies the format of the data. If WebView can't handle the specified MIME type, it will download the data. If null, defaults to 'text/html'.

Note that content specified in this way can access local device files (via 'file' scheme URLs) only if baseUrl specifies a scheme other than 'http', 'https', 'ftp', 'ftps', 'about' or 'javascript'.

If the base URL uses the data scheme, this method is equivalent to calling loadData() and the historyUrl is ignored, and the data will be treated as part of a data: URL, including the requirement that the content be URL-encoded or base64 encoded. If the base URL uses any other scheme, then the data will be loaded into the WebView as a plain string (i.e. not part of a data URL) and any URL-encoded entities in the string will not be decoded.

Note that the baseUrl is sent in the 'Referer' HTTP header when requesting subresources (images, etc.) of the page loaded using this method.

If a valid HTTP or HTTPS base URL is not specified in baseUrl, then content loaded using this method will have a window.origin value of "null". This must not be considered to be a trusted origin by the application or by any JavaScript code running inside the WebView (for example, event sources in DOM event handlers or web messages), because malicious content can also create frames with a null origin. If you need to identify the main frame's origin in a trustworthy way, you should use a valid HTTP or HTTPS base URL to set the origin.

Parameters
baseUrl String?: the URL to use as the page's base URL. If null defaults to 'about:blank'.
data String: a String of data in the given encoding This value cannot be null.
mimeType String?: the MIME type of the data, e.g. 'text/html'. This value may be null.
encoding String?: the encoding of the data This value may be null.
historyUrl String?: the URL to use as the history entry. If null defaults to 'about:blank'. If non-null, this must be a valid URL.

loadUrl

Added in API level 8
open fun loadUrl(
    url: String,
    additionalHttpHeaders: MutableMap<String!, String!>
): Unit

Loads the given URL with additional HTTP headers, specified as a map from name to value. Note that if this map contains any of the headers that are set by default by this WebView, such as those controlling caching, accept types or the User-Agent, their values may be overridden by this WebView's defaults.

Some older WebView implementations require additionalHttpHeaders to be mutable.

Also see compatibility note on evaluateJavascript.

Parameters
url String: the URL of the resource to load This value cannot be null.
additionalHttpHeaders MutableMap<String!, String!>: map with additional headers This value cannot be null.

loadUrl

Added in API level 1
open fun loadUrl(url: String): Unit

Loads the given URL.

Also see compatibility note on evaluateJavascript.

Parameters
url String: the URL of the resource to load This value cannot be null.

onApplyWindowInsets

Added in API level 20
open fun onApplyWindowInsets(insets: WindowInsets!): WindowInsets!
Parameters
insets WindowInsets!: Insets to apply
Return
WindowInsets! The supplied insets with any applied insets consumed

onCheckIsTextEditor

Added in API level 3
open fun onCheckIsTextEditor(): Boolean
Return
Boolean Returns true if this view is a text editor, else false.

onChildViewAdded

Added in API level 1
open fun onChildViewAdded(
    parent: View!,
    child: View!
): Unit

Deprecated: WebView no longer needs to implement ViewGroup.OnHierarchyChangeListener. This method does nothing now.

Parameters
parent View!: the view in which a child was added
child View!: the new child view added in the hierarchy

onChildViewRemoved

Added in API level 1
open fun onChildViewRemoved(
    p: View!,
    child: View!
): Unit

Deprecated: WebView no longer needs to implement ViewGroup.OnHierarchyChangeListener. This method does nothing now.

Parameters
parent the view from which the child was removed
child View!: the child removed from the hierarchy

onCreateInputConnection

Added in API level 3
open fun onCreateInputConnection(outAttrs: EditorInfo!): InputConnection!

Creates a new InputConnection for an InputMethod to interact with the WebView. This is similar to View#onCreateInputConnection but note that WebView calls InputConnection methods on a thread other than the UI thread. If these methods are overridden, then the overriding methods should respect thread restrictions when calling View methods or accessing data.

Parameters
outAttrs EditorInfo!: Fill in with attribute information about the connection.

onCreateVirtualViewTranslationRequests

Added in API level 31
open fun onCreateVirtualViewTranslationRequests(
    virtualIds: LongArray,
    supportedFormats: IntArray,
    requestsCollector: Consumer<ViewTranslationRequest!>
): Unit

Collects ViewTranslationRequests which represents the content to be translated for the virtual views in the host view. This is called if this view returned a virtual view structure from onProvideContentCaptureStructure and the system determined that those virtual views were relevant for translation.

The default implementation does nothing.

Parameters
virtualIds LongArray: This value cannot be null.
supportedFormats IntArray: This value cannot be null. Value is android.view.translation.TranslationSpec#DATA_FORMAT_TEXT
requestsCollector Consumer<ViewTranslationRequest!>: This value cannot be null.
Return
Unit This value may be null.

onDragEvent

Added in API level 11
open fun onDragEvent(event: DragEvent!): Boolean
Parameters
event DragEvent!: The DragEvent object sent by the system. The DragEvent#getAction() method returns an action type constant that indicates the type of drag event represented by this object.
Return
Boolean true if the method successfully handled the drag event, otherwise false.

The method must return true in response to an ACTION_DRAG_STARTED action type to continue to receive drag events for the current drag and drop operation.

The method should return true in response to an ACTION_DROP action type if the dropped data was consumed (at least partially); false, if none of the data was consumed.

For all other events, the return value is false.

onFinishTemporaryDetach

Added in API level 3
open fun onFinishTemporaryDetach(): Unit

onGenericMotionEvent

Added in API level 12
open fun onGenericMotionEvent(event: MotionEvent!): Boolean
Parameters
event MotionEvent!: The generic motion event being processed.
Return
Boolean True if the event was handled, false otherwise.

onGlobalFocusChanged

Added in API level 1
open fun onGlobalFocusChanged(
    oldFocus: View!,
    newFocus: View!
): Unit

Deprecated: WebView should not have implemented ViewTreeObserver.OnGlobalFocusChangeListener. This method does nothing now.

Parameters
oldFocus View!: The previously focused view, if any.
newFocus View!: The newly focused View, if any.

onHoverEvent

Added in API level 14
open fun onHoverEvent(event: MotionEvent!): Boolean
Parameters
event MotionEvent!: The motion event that describes the hover.
Return
Boolean True if the view handled the hover event.

onKeyDown

Added in API level 1
open fun onKeyDown(
    keyCode: Int,
    event: KeyEvent!
): Boolean
Parameters
keyCode Int: a key code that represents the button pressed, from android.view.KeyEvent
event KeyEvent!: the KeyEvent object that defines the button action
Return
Boolean If you handled the event, return true. If you want to allow the event to be handled by the next receiver, return false.

onKeyMultiple

Added in API level 1
open fun onKeyMultiple(
    keyCode: Int,
    repeatCount: Int,
    event: KeyEvent!
): Boolean
Parameters
keyCode Int: A key code that represents the button pressed, from android.view.KeyEvent.
count Number of pairs as returned by event.getRepeatCount().
event KeyEvent!: The KeyEvent object that defines the button action.
repeatCount Int: The number of times the action was made.
Return
Boolean If you handled the event, return true. If you want to allow the event to be handled by the next receiver, return false.

onKeyUp

Added in API level 1
open fun onKeyUp(
    keyCode: Int,
    event: KeyEvent!
): Boolean
Parameters
keyCode Int: A key code that represents the button pressed, from android.view.KeyEvent.
event KeyEvent!: The KeyEvent object that defines the button action.
Return
Boolean If you handled the event, return true. If you want to allow the event to be handled by the next receiver, return false.

onPause

Added in API level 11
open fun onPause(): Unit

Does a best-effort attempt to pause any processing that can be paused safely, such as animations and geolocation. Note that this call does not pause JavaScript. To pause JavaScript globally, use pauseTimers. To resume WebView, call onResume.

onProvideAutofillVirtualStructure

Added in API level 26
open fun onProvideAutofillVirtualStructure(
    structure: ViewStructure!,
    flags: Int
): Unit

Populates a ViewStructure containing virtual children to fullfil an autofill request.

This method should be used when the view manages a virtual structure under this view. For example, a view that draws input fields using draw(android.graphics.Canvas).

When implementing this method, subclasses must follow the rules below:

Views with virtual children support the Autofill Framework mainly by:

  • Providing the metadata defining what the virtual children mean and how they can be autofilled.
  • Implementing the methods that autofill the virtual children.

This method is responsible for the former; autofill(android.util.SparseArray) is responsible for the latter.

The ViewStructure traditionally represents a View, while for web pages it represent HTML nodes. Hence, it's necessary to "map" the HTML properties in a way that is understood by the android.service.autofill.AutofillService implementations:

  1. Only the HTML nodes inside a FORM are generated.
  2. The source of the HTML is set using ViewStructure#setWebDomain(String) in the node representing the WebView.
  3. If a web page has multiple FORMs, only the data for the current form is represented—if the user taps a field from another form, then the current autofill context is canceled (by calling android.view.autofill.AutofillManager#cancel() and a new context is created for that FORM.
  4. Similarly, if the page has IFRAME nodes, they are not initially represented in the view structure until the user taps a field from a FORM inside the IFRAME, in which case it would be treated the same way as multiple forms described above, except that the web domain of the FORM contains the src attribute from the IFRAME node.
  5. The W3C autofill field (autocomplete tag attribute) maps to ViewStructure#setAutofillHints(String[]).
  6. If the view is editable, the ViewStructure#setAutofillType(int) and ViewStructure#setAutofillValue(AutofillValue) must be set.
  7. The placeholder attribute maps to ViewStructure#setHint(CharSequence).
  8. Other HTML attributes can be represented through ViewStructure#setHtmlInfo(android.view.ViewStructure.HtmlInfo).

If the WebView implementation can determine that the value of a field was set statically (for example, not through Javascript), it should also call structure.setDataIsSensitive(false).

For example, an HTML form with 2 fields for username and password:

<label>Username:</label>
     <input type="text" name="username" id="user" value="Type your username" autocomplete="username" placeholder="Email or username">
     <label>Password:</label>
     <input type="password" name="password" id="pass" autocomplete="current-password" placeholder="Password">
  

Would map to:

int index = structure.addChildCount(2);
      ViewStructure username = structure.newChild(index);
      username.setAutofillId(structure.getAutofillId(), 1); // id 1 - first child
      username.setAutofillHints("username");
      username.setHtmlInfo(username.newHtmlInfoBuilder("input")
          .addAttribute("type", "text")
          .addAttribute("name", "username")
          .addAttribute("label", "Username:")
          .build());
      username.setHint("Email or username");
      username.setAutofillType(View.AUTOFILL_TYPE_TEXT);
      username.setAutofillValue(AutofillValue.forText("Type your username"));
      // Value of the field is not sensitive because it was created statically and not changed.
      username.setDataIsSensitive(false);
 
      ViewStructure password = structure.newChild(index + 1);
      username.setAutofillId(structure, 2); // id 2 - second child
      password.setAutofillHints("current-password");
      password.setHtmlInfo(password.newHtmlInfoBuilder("input")
          .addAttribute("type", "password")
          .addAttribute("name", "password")
          .addAttribute("label", "Password:")
          .build());
      password.setHint("Password");
      password.setAutofillType(View.AUTOFILL_TYPE_TEXT);
  
Parameters
structure ViewStructure!: fill in with virtual children data for autofill purposes.
flags Int: optional flags.

onProvideContentCaptureStructure

Added in API level 30
open fun onProvideContentCaptureStructure(
    structure: ViewStructure,
    flags: Int
): Unit

Populates a ViewStructure for content capture.

This method is called after a view that is eligible for content capture (for example, if it isImportantForContentCapture(), an intelligence service is enabled for the user, and the activity rendering the view is enabled for content capture) is laid out and is visible. The populated structure is then passed to the service through ContentCaptureSession#notifyViewAppeared(ViewStructure).

The default implementation of this method sets the most relevant properties based on related View methods, and views in the standard Android widgets library also override it to set their relevant properties. Therefore, if overriding this method, it is recommended to call super.onProvideContentCaptureStructure().

Note: views that manage a virtual structure under this view must populate just the node representing this view and return right away, then asynchronously report (not necessarily in the UI thread) when the children nodes appear, disappear or have their text changed by calling ContentCaptureSession#notifyViewAppeared(ViewStructure), ContentCaptureSession#notifyViewDisappeared(AutofillId), and ContentCaptureSession#notifyViewTextChanged(AutofillId, CharSequence) respectively. The structure for a child must be created using ContentCaptureSession#newVirtualViewStructure(AutofillId, long), and the autofillId for a child can be obtained either through childStructure.getAutofillId() or ContentCaptureSession#newAutofillId(AutofillId, long).

When the virtual view hierarchy represents a web page, you should also:

Note: the following methods of the structure will be ignored:

Parameters
structure ViewStructure: This value cannot be null.

onProvideVirtualStructure

Added in API level 23
open fun onProvideVirtualStructure(structure: ViewStructure!): Unit

onResolvePointerIcon

Added in API level 24
open fun onResolvePointerIcon(
    event: MotionEvent,
    pointerIndex: Int
): PointerIcon?

Resolve the pointer icon that should be used for specified pointer in the motion event. The default implementation will resolve the pointer icon to one set using setPointerIcon(android.view.PointerIcon) for mouse devices. Subclasses may override this to customize the icon for the given pointer. For example, the pointer icon for a stylus pointer can be resolved in the following way:

@Override
  public PointerIcon onResolvePointerIcon(MotionEvent event, int pointerIndex) {
      final int toolType = event.getToolType(pointerIndex);
      if (!event.isFromSource(InputDevice.SOURCE_MOUSE)
              && event.isFromSource(InputDevice.SOURCE_STYLUS)
              && (toolType == MotionEvent.TOOL_TYPE_STYLUS
                      || toolType == MotionEvent.TOOL_TYPE_ERASER)) {
          // Show this pointer icon only if this pointer is a stylus.
          return PointerIcon.getSystemIcon(mContext, PointerIcon.TYPE_WAIT);
      }
      // Use the default logic for determining the pointer icon for other non-stylus pointers,
      // like for the mouse cursor.
      return super.onResolvePointerIcon(event, pointerIndex);
  }
  

Parameters
event MotionEvent: This value cannot be null.
pointerIndex Int: The index of the pointer in event for which to retrieve the PointerIcon. This will be between 0 and MotionEvent#getPointerCount().
Return
PointerIcon? This value may be null.

onResume

Added in API level 11
open fun onResume(): Unit

Resumes a WebView after a previous call to onPause.

onStartTemporaryDetach

Added in API level 3
open fun onStartTemporaryDetach(): Unit

onTouchEvent

Added in API level 1
open fun onTouchEvent(event: MotionEvent!): Boolean
Parameters
event MotionEvent!: The motion event.
Return
Boolean True if the event was handled, false otherwise.

onTrackballEvent

Added in API level 1
open fun onTrackballEvent(event: MotionEvent!): Boolean
Parameters
event MotionEvent!: The motion event.
Return
Boolean True if the event was handled, false otherwise.

onVirtualViewTranslationResponses

Added in API level 31
open fun onVirtualViewTranslationResponses(response: LongSparseArray<ViewTranslationResponse!>): Unit

Called when the content from View#onCreateVirtualViewTranslationRequests had been translated by the TranslationService.

The default implementation does nothing.

Parameters
response LongSparseArray<ViewTranslationResponse!>: This value cannot be null.

onWindowFocusChanged

Added in API level 1
open fun onWindowFocusChanged(hasWindowFocus: Boolean): Unit
Parameters
hasWindowFocus Boolean: True if the window containing this view now has focus, false otherwise.

overlayHorizontalScrollbar

Added in API level 1
Deprecated in API level 23
open fun overlayHorizontalScrollbar(): Boolean

Deprecated: This method is now obsolete.

Gets whether horizontal scrollbar has overlay style.

Return
Boolean true

overlayVerticalScrollbar

Added in API level 1
Deprecated in API level 23
open fun overlayVerticalScrollbar(): Boolean

Deprecated: This method is now obsolete.

Gets whether vertical scrollbar has overlay style.

Return
Boolean false

pageDown

Added in API level 1
open fun pageDown(bottom: Boolean): Boolean

Scrolls the contents of this WebView down by half the page size.

Parameters
bottom Boolean: true to jump to bottom of page
Return
Boolean true if the page was scrolled

pageUp

Added in API level 1
open fun pageUp(top: Boolean): Boolean

Scrolls the contents of this WebView up by half the view size.

Parameters
top Boolean: true to jump to the top of the page
Return
Boolean true if the page was scrolled

pauseTimers

Added in API level 1
open fun pauseTimers(): Unit

Pauses all layout, parsing, and JavaScript timers for all WebViews. This is a global requests, not restricted to just this WebView. This can be useful if the application has been paused.

performLongClick

Added in API level 1
open fun performLongClick(): Boolean
Return
Boolean true if one of the above receivers consumed the event, false otherwise

postUrl

Added in API level 5
open fun postUrl(
    url: String,
    postData: ByteArray
): Unit

Loads the URL with postData using "POST" method into this WebView. If url is not a network URL, it will be loaded with loadUrl(java.lang.String) instead, ignoring the postData param.

Parameters
url String: the URL of the resource to load This value cannot be null.
postData ByteArray: the data will be passed to "POST" request, which must be be "application/x-www-form-urlencoded" encoded. This value cannot be null.

postVisualStateCallback

Added in API level 23
open fun postVisualStateCallback(
    requestId: Long,
    callback: WebView.VisualStateCallback
): Unit

Posts a VisualStateCallback, which will be called when the current state of the WebView is ready to be drawn.

Because updates to the DOM are processed asynchronously, updates to the DOM may not immediately be reflected visually by subsequent WebView#onDraw invocations. The VisualStateCallback provides a mechanism to notify the caller when the contents of the DOM at the current time are ready to be drawn the next time the WebView draws.

The next draw after the callback completes is guaranteed to reflect all the updates to the DOM up to the point at which the VisualStateCallback was posted, but it may also contain updates applied after the callback was posted.

The state of the DOM covered by this API includes the following:

  • primitive HTML elements (div, img, span, etc..)
  • images
  • CSS animations
  • WebGL
  • canvas
It does not include the state of:
  • the video tag

To guarantee that the WebView will successfully render the first frame after the VisualStateCallback#onComplete method has been called a set of conditions must be met:

When using this API it is also recommended to enable pre-rasterization if the WebView is off screen to avoid flickering. See WebSettings#setOffscreenPreRaster for more details and do consider its caveats.

Parameters
requestId Long: An id that will be returned in the callback to allow callers to match requests with callbacks.
callback WebView.VisualStateCallback: The callback to be invoked. This value cannot be null.

postWebMessage

Added in API level 23
open fun postWebMessage(
    message: WebMessage,
    targetOrigin: Uri
): Unit

Post a message to main frame. The embedded application can restrict the messages to a certain target origin. See HTML5 spec for how target origin can be used.

A target origin can be set as a wildcard ("*"). However this is not recommended. See the page above for security issues.

Content loaded via loadData(java.lang.String,java.lang.String,java.lang.String) will not have a valid origin, and thus cannot be sent messages securely. If you need to send messages using this function, you should use loadDataWithBaseURL(java.lang.String,java.lang.String,java.lang.String,java.lang.String,java.lang.String) with a valid HTTP or HTTPS baseUrl to define a valid origin that can be used for messaging.

Parameters
message WebMessage: the WebMessage This value cannot be null.
targetOrigin Uri: the target origin. This value cannot be null.

reload

Added in API level 1
open fun reload(): Unit

Reloads the current URL.

removeJavascriptInterface

Added in API level 11
open fun removeJavascriptInterface(name: String): Unit

Removes a previously injected Java object from this WebView. Note that the removal will not be reflected in JavaScript until the page is next (re)loaded. See addJavascriptInterface.

Parameters
name String: the name used to expose the object in JavaScript This value cannot be null.

requestChildRectangleOnScreen

Added in API level 1
open fun requestChildRectangleOnScreen(
    child: View,
    rect: Rect!,
    immediate: Boolean
): Boolean
Parameters
child View: The direct child making the request. This value cannot be null.
rectangle The rectangle in the child's coordinates the child wishes to be on the screen.
immediate Boolean: True to forbid animated or delayed scrolling, false otherwise
Return
Boolean Whether the group scrolled to handle the operation

requestFocus

Added in API level 1
open fun requestFocus(
    direction: Int,
    previouslyFocusedRect: Rect!
): Boolean
Parameters
direction Int: One of FOCUS_UP, FOCUS_DOWN, FOCUS_LEFT, and FOCUS_RIGHT
previouslyFocusedRect Rect!: The rectangle (in this View's coordinate system) to give a finer grained hint about where focus is coming from. May be null if there is no hint.
Return
Boolean Whether this view or one of its descendants actually took focus.

requestFocusNodeHref

Added in API level 1
open fun requestFocusNodeHref(hrefMsg: Message?): Unit

Requests the anchor or image element URL at the last tapped point. If hrefMsg is null, this method returns immediately and does not dispatch hrefMsg to its target. If the tapped point hits an image, an anchor, or an image in an anchor, the message associates strings in named keys in its data. The value paired with the key may be an empty string.

Parameters
hrefMsg Message?: the message to be dispatched with the result of the request. The message data contains three keys. "url" returns the anchor's href attribute. "title" returns the anchor's text. "src" returns the image's src attribute. This value may be null.

requestImageRef

Added in API level 1
open fun requestImageRef(msg: Message): Unit

Requests the URL of the image last touched by the user. msg will be sent to its target with a String representing the URL as its object.

Parameters
msg Message: the message to be dispatched with the result of the request as the data member with "url" as key. The result can be null.

restoreState

Added in API level 1
open fun restoreState(inState: Bundle): WebBackForwardList?

Restores the state of this WebView from the given Bundle. This method is intended for use in android.app.Activity#onRestoreInstanceState and should be called to restore the state of this WebView. If it is called after this WebView has had a chance to build state (load pages, create a back/forward list, etc.) there may be undesirable side-effects. Please note that this method no longer restores the display data for this WebView.

Parameters
inState Bundle: the incoming Bundle of state This value cannot be null.
Return
WebBackForwardList? the restored back/forward list or null if restoreState failed

resumeTimers

Added in API level 1
open fun resumeTimers(): Unit

Resumes all layout, parsing, and JavaScript timers for all WebViews. This will resume dispatching all timers.

savePassword

Added in API level 1
Deprecated in API level 18
open fun savePassword(
    host: String!,
    username: String!,
    password: String!
): Unit

Deprecated: Saving passwords in WebView will not be supported in future versions.

Sets a username and password pair for the specified host. This data is used by the WebView to autocomplete username and password fields in web forms. Note that this is unrelated to the credentials used for HTTP authentication.

Parameters
host String!: the host that required the credentials
username String!: the username for the given host
password String!: the password for the given host

saveState

Added in API level 1
open fun saveState(outState: Bundle): WebBackForwardList?

Saves the state of this WebView used in android.app.Activity#onSaveInstanceState. Please note that this method no longer stores the display data for this WebView. The previous behavior could potentially leak files if restoreState was never called.

Parameters
outState Bundle: the Bundle to store this WebView's state This value cannot be null.
Return
WebBackForwardList? the same copy of the back/forward list used to save the state, null if the method fails.

saveWebArchive

Added in API level 11
open fun saveWebArchive(filename: String): Unit

Saves the current view as a web archive.

Parameters
filename String: the filename where the archive should be placed This value cannot be null.

saveWebArchive

Added in API level 11
open fun saveWebArchive(
    basename: String,
    autoname: Boolean,
    callback: ValueCallback<String!>?
): Unit

Saves the current view as a web archive.

Parameters
basename String: the filename where the archive should be placed This value cannot be null.
autoname Boolean: if false, takes basename to be a file. If true, basename is assumed to be a directory in which a filename will be chosen according to the URL of the current page.
callback ValueCallback<String!>?: called after the web archive has been saved. The parameter for onReceiveValue will either be the filename under which the file was saved, or null if saving the file failed.

setBackgroundColor

Added in API level 1
open fun setBackgroundColor(color: Int): Unit
Parameters
color Int: the color of the background

setCertificate

Added in API level 1
Deprecated in API level 17
open fun setCertificate(certificate: SslCertificate!): Unit

Deprecated: Calling this function has no useful effect, and will be ignored in future releases.

Sets the SSL certificate for the main top-level page.

setDataDirectorySuffix

Added in API level 28
open static fun setDataDirectorySuffix(suffix: String): Unit

Define the directory used to store WebView data for the current process. The provided suffix will be used when constructing data and cache directory paths. If this API is not called, no suffix will be used. Each directory can be used by only one process in the application. If more than one process in an app wishes to use WebView, only one process can use the default directory, and other processes must call this API to define a unique suffix.

This means that different processes in the same application cannot directly share WebView-related data, since the data directories must be distinct. Applications that use this API may have to explicitly pass data between processes. For example, login cookies may have to be copied from one process's cookie jar to the other using CookieManager if both processes' WebViews are intended to be logged in.

Most applications should simply ensure that all components of the app that rely on WebView are in the same process, to avoid needing multiple data directories. The disableWebView method can be used to ensure that the other processes do not use WebView by accident in this case.

This API must be called before any instances of WebView are created in this process and before any other methods in the android.webkit package are called by this process.

Parameters
suffix String: The directory name suffix to be used for the current process. Must not contain a path separator. This value cannot be null.
Exceptions
java.lang.IllegalStateException if WebView has already been initialized in the current process.
java.lang.IllegalArgumentException if the suffix contains a path separator.

setDownloadListener

Added in API level 1
open fun setDownloadListener(listener: DownloadListener?): Unit

Registers the interface to be used when content can not be handled by the rendering engine, and should be downloaded instead. This will replace the current handler.

Parameters
listener DownloadListener?: an implementation of DownloadListener This value may be null.

setFindListener

Added in API level 16
open fun setFindListener(listener: WebView.FindListener?): Unit

Registers the listener to be notified as find-on-page operations progress. This will replace the current listener.

Parameters
listener WebView.FindListener?: an implementation of FindListener This value may be null.

setHorizontalScrollbarOverlay

Added in API level 1
Deprecated in API level 23
open fun setHorizontalScrollbarOverlay(overlay: Boolean): Unit

Deprecated: This method has no effect.

Specifies whether the horizontal scrollbar has overlay style.

Parameters
overlay Boolean: true if horizontal scrollbar should have overlay style

setHttpAuthUsernamePassword

Added in API level 1
Deprecated in API level 26
open fun setHttpAuthUsernamePassword(
    host: String!,
    realm: String!,
    username: String!,
    password: String!
): Unit

Deprecated: Use WebViewDatabase#setHttpAuthUsernamePassword instead

Stores HTTP authentication credentials for a given host and realm to the WebViewDatabase instance.

Parameters
host String!: the host to which the credentials apply
realm String!: the realm to which the credentials apply
username String!: the username
password String!: the password

setInitialScale

Added in API level 1
open fun setInitialScale(scaleInPercent: Int): Unit

Sets the initial scale for this WebView. 0 means default. The behavior for the default scale depends on the state of WebSettings#getUseWideViewPort() and WebSettings#getLoadWithOverviewMode(). If the content fits into the WebView control by width, then the zoom is set to 100%. For wide content, the behavior depends on the state of WebSettings#getLoadWithOverviewMode(). If its value is true, the content will be zoomed out to be fit by width into the WebView control, otherwise not. If initial scale is greater than 0, WebView starts with this value as initial scale. Please note that unlike the scale properties in the viewport meta tag, this method doesn't take the screen density into account.

Parameters
scaleInPercent Int: the initial scale in percent

setLayerType

Added in API level 11
open fun setLayerType(
    layerType: Int,
    paint: Paint?
): Unit
Parameters
layerType Int: The type of layer to use with this view, must be one of LAYER_TYPE_NONE, LAYER_TYPE_SOFTWARE or LAYER_TYPE_HARDWARE Value is android.view.View#LAYER_TYPE_NONE, android.view.View#LAYER_TYPE_SOFTWARE, or android.view.View#LAYER_TYPE_HARDWARE
paint Paint?: The paint used to compose the layer. This argument is optional and can be null. It is ignored when the layer type is LAYER_TYPE_NONE

setLayoutParams

Added in API level 1
open fun setLayoutParams(params: ViewGroup.LayoutParams!): Unit
Parameters
params ViewGroup.LayoutParams!: The layout parameters for this view, cannot be null

setMapTrackballToArrowKeys

Added in API level 1
Deprecated in API level 17
open fun setMapTrackballToArrowKeys(setMap: Boolean): Unit

Deprecated: Only the default case, true, will be supported in a future version.

setNetworkAvailable

Added in API level 3
open fun setNetworkAvailable(networkUp: Boolean): Unit

Informs WebView of the network state. This is used to set the JavaScript property window.navigator.isOnline and generates the online/offline event as specified in HTML5, sec. 5.7.7

Parameters
networkUp Boolean: a boolean indicating if network is available

setOverScrollMode

Added in API level 9
open fun setOverScrollMode(mode: Int): Unit
Parameters
overScrollMode The new over-scroll mode for this view.

setPictureListener

Added in API level 1
Deprecated in API level 15
open fun setPictureListener(listener: WebView.PictureListener!): Unit

Deprecated: This method is now obsolete.

Sets the Picture listener. This is an interface used to receive notifications of a new Picture.

Parameters
listener WebView.PictureListener!: an implementation of WebView.PictureListener

setRendererPriorityPolicy

Added in API level 26
open fun setRendererPriorityPolicy(
    rendererRequestedPriority: Int,
    waivedWhenNotVisible: Boolean
): Unit

Set the renderer priority policy for this WebView. The priority policy will be used to determine whether an out of process renderer should be considered to be a target for OOM killing. Because a renderer can be associated with more than one WebView, the final priority it is computed as the maximum of any attached WebViews. When a WebView is destroyed it will cease to be considerered when calculating the renderer priority. Once no WebViews remain associated with the renderer, the priority of the renderer will be reduced to RENDERER_PRIORITY_WAIVED. The default policy is to set the priority to RENDERER_PRIORITY_IMPORTANT regardless of visibility, and this should not be changed unless the caller also handles renderer crashes with WebViewClient#onRenderProcessGone. Any other setting will result in WebView renderers being killed by the system more aggressively than the application.

Parameters
rendererRequestedPriority Int: the minimum priority at which this WebView desires the renderer process to be bound. Value is android.webkit.WebView#RENDERER_PRIORITY_WAIVED, android.webkit.WebView#RENDERER_PRIORITY_BOUND, or android.webkit.WebView#RENDERER_PRIORITY_IMPORTANT
waivedWhenNotVisible Boolean: if true, this flag specifies that when this WebView is not visible, it will be treated as if it had requested a priority of RENDERER_PRIORITY_WAIVED.

setSafeBrowsingWhitelist

Added in API level 27
open static fun setSafeBrowsingWhitelist(
    hosts: MutableList<String!>,
    callback: ValueCallback<Boolean!>?
): Unit

Sets the list of hosts (domain names/IP addresses) that are exempt from SafeBrowsing checks. The list is global for all the WebViews.

Each rule should take one of these:

Rule Example Matches Subdomain
HOSTNAME example.com Yes
.HOSTNAME .example.com No
IPV4_LITERAL 192.168.1.1 No
IPV6_LITERAL_WITH_BRACKETS [10:20:30:40:50:60:70:80] No

All other rules, including wildcards, are invalid.

The correct syntax for hosts is defined by RFC 3986.

Parameters
hosts MutableList<String!>: the list of hosts This value cannot be null.
callback ValueCallback<Boolean!>?: will be called with true if hosts are successfully added to the allowlist. It will be called with false if any hosts are malformed. The callback will be run on the UI thread This value may be null.

setScrollBarStyle

Added in API level 1
open fun setScrollBarStyle(style: Int): Unit
Parameters
style Int: the style of the scrollbars. Should be one of SCROLLBARS_INSIDE_OVERLAY, SCROLLBARS_INSIDE_INSET, SCROLLBARS_OUTSIDE_OVERLAY or SCROLLBARS_OUTSIDE_INSET. Value is android.view.View#SCROLLBARS_INSIDE_OVERLAY, android.view.View#SCROLLBARS_INSIDE_INSET, android.view.View#SCROLLBARS_OUTSIDE_OVERLAY, or android.view.View#SCROLLBARS_OUTSIDE_INSET

setTextClassifier

Added in API level 27
open fun setTextClassifier(textClassifier: TextClassifier?): Unit

Sets the TextClassifier for this WebView.

Parameters
textClassifier TextClassifier?: This value may be null.

setVerticalScrollbarOverlay

Added in API level 1
Deprecated in API level 23
open fun setVerticalScrollbarOverlay(overlay: Boolean): Unit

Deprecated: This method has no effect.

Specifies whether the vertical scrollbar has overlay style.

Parameters
overlay Boolean: true if vertical scrollbar should have overlay style

setWebChromeClient

Added in API level 1
open fun setWebChromeClient(client: WebChromeClient?): Unit

Sets the chrome handler. This is an implementation of WebChromeClient for use in handling JavaScript dialogs, favicons, titles, and the progress. This will replace the current handler.

Parameters
client WebChromeClient?: an implementation of WebChromeClient This value may be null.

setWebContentsDebuggingEnabled

Added in API level 19
open static fun setWebContentsDebuggingEnabled(enabled: Boolean): Unit

Enables debugging of web contents (HTML / CSS / JavaScript) loaded into any WebViews of this application. This flag can be enabled in order to facilitate debugging of web layouts and JavaScript code running inside WebViews. Please refer to WebView documentation for the debugging guide.

In WebView 113.0.5656.0 and later, this is enabled automatically if the app is declared as android:debuggable="true" in its manifest; otherwise, the default is false.

Enabling web contents debugging allows the state of any WebView in the app to be inspected and modified by the user via adb. This is a security liability and should not be enabled in production builds of apps unless this is an explicitly intended use of the app. More info on secure debug settings.

Parameters
enabled Boolean: whether to enable web contents debugging

setWebViewClient

Added in API level 1
open fun setWebViewClient(client: WebViewClient): Unit

Sets the WebViewClient that will receive various notifications and requests. This will replace the current handler.

Parameters
client WebViewClient: an implementation of WebViewClient This value cannot be null.

setWebViewRenderProcessClient

Added in API level 29
open fun setWebViewRenderProcessClient(
    executor: Executor,
    webViewRenderProcessClient: WebViewRenderProcessClient
): Unit

Sets the renderer client object associated with this WebView.

The renderer client encapsulates callbacks relevant to WebView renderer state. See WebViewRenderProcessClient for details.

Although many WebView instances may share a single underlying renderer, and renderers may live either in the application process, or in a sandboxed process that is isolated from the application process, instances of WebViewRenderProcessClient are set per-WebView. Callbacks represent renderer events from the perspective of this WebView, and may or may not be correlated with renderer events affecting other WebViews.

Parameters
executor Executor: the Executor on which WebViewRenderProcessClient callbacks will execute. This value cannot be null. Callback and listener events are dispatched through this Executor, providing an easy way to control which thread is used. To dispatch events through the main thread of your application, you can use Context.getMainExecutor(). Otherwise, provide an Executor that dispatches to an appropriate thread.
webViewRenderProcessClient WebViewRenderProcessClient: the WebViewRenderProcessClient object. This value cannot be null.

setWebViewRenderProcessClient

Added in API level 29
open fun setWebViewRenderProcessClient(webViewRenderProcessClient: WebViewRenderProcessClient?): Unit

Sets the renderer client object associated with this WebView. See setWebViewRenderProcessClient(java.util.concurrent.Executor,android.webkit.WebViewRenderProcessClient) for details.

WebViewRenderProcessClient callbacks will run on the thread that this WebView was initialized on.

Parameters
webViewRenderProcessClient WebViewRenderProcessClient?: the WebViewRenderProcessClient object. This value may be null.

shouldDelayChildPressedState

Added in API level 14
open fun shouldDelayChildPressedState(): Boolean

Deprecated: Deprecated in Java.

showFindDialog

Added in API level 11
Deprecated in API level 18
open fun showFindDialog(
    text: String?,
    showIme: Boolean
): Boolean

Deprecated: This method does not work reliably on all Android versions; implementing a custom find dialog using WebView.findAllAsync() provides a more robust solution.

Starts an ActionMode for finding text in this WebView. Only works if this WebView is attached to the view system.

Parameters
text String?: if non-null, will be the initial text to search for. Otherwise, the last String searched for in this WebView will be used to start.
showIme Boolean: if true, show the IME, assuming the user will begin typing. If false and text is non-null, perform a find all.
Return
Boolean true if the find dialog is shown, false otherwise

startSafeBrowsing

Added in API level 27
open static fun startSafeBrowsing(
    context: Context,
    callback: ValueCallback<Boolean!>?
): Unit

Starts Safe Browsing initialization.

URL loads are not guaranteed to be protected by Safe Browsing until after callback is invoked with true. Safe Browsing is not fully supported on all devices. For those devices callback will receive false.

This should not be called if Safe Browsing has been disabled by manifest tag or android.webkit.WebSettings#setSafeBrowsingEnabled. This prepares resources used for Safe Browsing.

This should be called with the Application Context (and will always use the Application context to do its work regardless).

Parameters
context Context: Application Context. This value cannot be null.
callback ValueCallback<Boolean!>?: will be called on the UI thread with true if initialization is successful, false otherwise. This value may be null.

stopLoading

Added in API level 1
open fun stopLoading(): Unit

Stops the current load.

zoomBy

Added in API level 21
open fun zoomBy(zoomFactor: Float): Unit

Performs a zoom operation in this WebView.

Parameters
zoomFactor Float: the zoom factor to apply. The zoom factor will be clamped to the WebView's zoom limits. This value must be in the range 0.01 to 100.0 inclusive.

zoomIn

Added in API level 1
open fun zoomIn(): Boolean

Performs zoom in in this WebView.

Return
Boolean true if zoom in succeeds, false if no zoom changes

zoomOut

Added in API level 1
open fun zoomOut(): Boolean

Performs zoom out in this WebView.

Return
Boolean true if zoom out succeeds, false if no zoom changes

Protected methods

computeHorizontalScrollOffset

Added in API level 1
protected open fun computeHorizontalScrollOffset(): Int
Return
Int the horizontal offset of the scrollbar's thumb

computeHorizontalScrollRange

Added in API level 1
protected open fun computeHorizontalScrollRange(): Int
Return
Int the total horizontal range represented by the horizontal scrollbar

computeVerticalScrollExtent

Added in API level 1
protected open fun computeVerticalScrollExtent(): Int
Return
Int the vertical extent of the scrollbar's thumb

computeVerticalScrollOffset

Added in API level 1
protected open fun computeVerticalScrollOffset(): Int
Return
Int the vertical offset of the scrollbar's thumb

computeVerticalScrollRange

Added in API level 1
protected open fun computeVerticalScrollRange(): Int
Return
Int the total vertical range represented by the vertical scrollbar

The default range is the drawing height of this view.

dispatchDraw

Added in API level 1
protected open fun dispatchDraw(canvas: Canvas): Unit
Parameters
canvas Canvas: This value cannot be null.

onAttachedToWindow

Added in API level 1
protected open fun onAttachedToWindow(): Unit

onConfigurationChanged

Added in API level 8
protected open fun onConfigurationChanged(newConfig: Configuration!): Unit
Parameters
newConfig Configuration!: The new resource configuration.

onDraw

Added in API level 1
protected open fun onDraw(canvas: Canvas): Unit
Parameters
canvas Canvas: the canvas on which the background will be drawn This value cannot be null.

onFocusChanged

Added in API level 1
protected open fun onFocusChanged(
    focused: Boolean,
    direction: Int,
    previouslyFocusedRect: Rect?
): Unit
Parameters
gainFocus True if the View has focus; false otherwise.
direction Int: The direction focus has moved when requestFocus() is called to give this view focus. Values are FOCUS_UP, FOCUS_DOWN, FOCUS_LEFT, FOCUS_RIGHT, FOCUS_FORWARD, or FOCUS_BACKWARD. It may not always apply, in which case use the default. Value is android.view.View#FOCUS_BACKWARD, android.view.View#FOCUS_FORWARD, android.view.View#FOCUS_LEFT, android.view.View#FOCUS_UP, android.view.View#FOCUS_RIGHT, or android.view.View#FOCUS_DOWN
previouslyFocusedRect Rect?: The rectangle, in this view's coordinate system, of the previously focused view. If applicable, this will be passed in as finer grained information about where the focus is coming from (in addition to direction). Will be null otherwise.

onMeasure

Added in API level 1
protected open fun onMeasure(
    widthMeasureSpec: Int,
    heightMeasureSpec: Int
): Unit
Parameters
widthMeasureSpec Int: horizontal space requirements as imposed by the parent. The requirements are encoded with android.view.View.MeasureSpec.
heightMeasureSpec Int: vertical space requirements as imposed by the parent. The requirements are encoded with android.view.View.MeasureSpec.

onOverScrolled

Added in API level 9
protected open fun onOverScrolled(
    scrollX: Int,
    scrollY: Int,
    clampedX: Boolean,
    clampedY: Boolean
): Unit
Parameters
scrollX Int: New X scroll value in pixels
scrollY Int: New Y scroll value in pixels
clampedX Boolean: True if scrollX was clamped to an over-scroll boundary
clampedY Boolean: True if scrollY was clamped to an over-scroll boundary

onScrollChanged

Added in API level 1
protected open fun onScrollChanged(
    l: Int,
    t: Int,
    oldl: Int,
    oldt: Int
): Unit
Parameters
l Int: Current horizontal scroll origin.
t Int: Current vertical scroll origin.
oldl Int: Previous horizontal scroll origin.
oldt Int: Previous vertical scroll origin.

onSizeChanged

Added in API level 1
protected open fun onSizeChanged(
    w: Int,
    h: Int,
    ow: Int,
    oh: Int
): Unit
Parameters
w Int: Current width of this view.
h Int: Current height of this view.
oldw Old width of this view.
oldh Old height of this view.

onVisibilityChanged

Added in API level 8
protected open fun onVisibilityChanged(
    changedView: View,
    visibility: Int
): Unit
Parameters
changedView View: The view whose visibility changed. May be this or an ancestor view. This value cannot be null.
visibility Int: The new visibility, one of VISIBLE, INVISIBLE or GONE. Value is android.view.View#VISIBLE, android.view.View#INVISIBLE, or android.view.View#GONE

onWindowVisibilityChanged

Added in API level 1
protected open fun onWindowVisibilityChanged(visibility: Int): Unit
Parameters
visibility Int: The new visibility of the window. Value is android.view.View#VISIBLE, android.view.View#INVISIBLE, or android.view.View#GONE