WebChromeClient

When not playing, video elements are represented by a 'poster' image. The image to use can be specified by the poster attribute of the video tag in HTML. If the attribute is absent, then a default poster will be used. This method allows the ChromeClient to provide that default image.

When the user starts to playback a video element, it may take time for enough data to be buffered before the first frames can be rendered. While this buffering is taking place, the ChromeClient can use this function to provide a View to be displayed. For example, the ChromeClient could show a spinner animation.

Obtains a list of all visited history items, used for link coloring

Notify the host application to close the given WebView and remove it from the view system if necessary. At this point, WebCore has stopped any loading in this window and has removed any cross-scripting ability in javascript.

Report a JavaScript error message to the host application. The ChromeClient should override this to process the log message as they see fit.

Report a JavaScript console message to the host application. The ChromeClient should override this to process the log message as they see fit.

Request the host application to create a new window. If the host application chooses to honor this request, it should return true from this method, create a new WebView to host the window, insert it into the View system and send the supplied resultMsg message to its target with the new WebView as an argument. If the host application chooses not to honor the request, it should return false from this method. The default implementation of this method does nothing and hence returns false.

Tell the client that the quota has been exceeded for the Web SQL Database API for a particular origin and request a new quota. The client must respond by invoking the updateQuota(long) method of the supplied WebStorage.QuotaUpdater instance. The minimum value that can be set for the new quota is the current quota. The default implementation responds with the current quota, so the quota will not be increased.

Notify the host application that a request for Geolocation permissions, made with a previous call to onGeolocationPermissionsShowPrompt() has been canceled. Any related UI should therefore be hidden.

Notify the host application that web content from the specified origin is attempting to use the Geolocation API, but no permission state is currently set for that origin. The host application should invoke the specified callback with the desired permission state. See GeolocationPermissions for details.

Notify the host application that the current page would like to hide its custom view.

Tell the client to display a javascript alert dialog. If the client returns true, WebView will assume that the client will handle the dialog. If the client returns false, it will continue execution.

Tell the client to display a dialog to confirm navigation away from the current page. This is the result of the onbeforeunload javascript event. If the client returns true, WebView will assume that the client will handle the confirm dialog and call the appropriate JsResult method. If the client returns false, a default value of true will be returned to javascript to accept navigation away from the current page. The default behavior is to return false. Setting the JsResult to true will navigate away from the current page, false will cancel the navigation.

Tell the client to display a confirm dialog to the user. If the client returns true, WebView will assume that the client will handle the confirm dialog and call the appropriate JsResult method. If the client returns false, a default value of false will be returned to javascript. The default behavior is to return false.

Tell the client to display a prompt dialog to the user. If the client returns true, WebView will assume that the client will handle the prompt dialog and call the appropriate JsPromptResult method. If the client returns false, a default value of false will be returned to to javascript. The default behavior is to return false.

Tell the client that a JavaScript execution timeout has occured. And the client may decide whether or not to interrupt the execution. If the client returns true, the JavaScript will be interrupted. If the client returns false, the execution will continue. Note that in the case of continuing execution, the timeout counter will be reset, and the callback will continue to occur if the script does not finish at the next check point.

Notify the host application that web content is requesting permission to access the specified resources and the permission currently isn't granted or denied. The host application must invoke grant(String[]) or deny(). If this method isn't overridden, the permission is denied.

Notify the host application that the given permission request has been canceled. Any related UI should therefore be hidden.

Tell the host application the current progress of loading a page.

Notify the host application that the Application Cache has reached the maximum size. The client must respond by invoking the updateQuota(long) method of the supplied WebStorage.QuotaUpdater instance. The minimum value that can be set for the new quota is the current quota. The default implementation responds with the current quota, so the quota will not be increased.

Notify the host application of a new favicon for the current page.

Notify the host application of a change in the document title.

Notify the host application of the url for an apple-touch-icon.

Request display and focus for this WebView. This may happen due to another WebView opening a link in this WebView and requesting that this WebView be displayed.

Notify the host application that the current page would like to show a custom View. This is used for Fullscreen video playback; see "HTML5 Video support" documentation on WebView.

Notify the host application that the current page would like to show a custom View in a particular orientation.

Tell the client to show a file chooser. This is called to handle HTML forms with 'file' input type, in response to the user pressing the "Select File" button. To cancel the request, call filePathCallback.onReceiveValue(null) and return true.