Since: API Level 1

public class

WebView

extends AbsoluteLayout
implements ViewGroup.OnHierarchyChangeListener ViewTreeObserver.OnGlobalFocusChangeListener

java.lang.Object
↳	android.view.View
	↳	android.view.ViewGroup
		↳	android.widget.AbsoluteLayout
			↳	android.webkit.WebView

Class Overview

A View that displays web pages. This class is the basis upon which you can roll your own web browser or simply display some online content within your Activity. It uses the WebKit rendering engine to display web pages and includes methods to navigate forward and backward through a history, zoom in and out, perform text searches and more.

To enable the built-in zoom, set WebSettings.setBuiltInZoomControls(boolean) (introduced in API version 3).

Note that, in order for your Activity to access the Internet and load web pages in a WebView, you must add the INTERNET permissions to your Android Manifest file:

<uses-permission android:name="android.permission.INTERNET" />

This must be a child of the <manifest> element.

See the Web View tutorial.

Basic usage

By default, a WebView provides no browser-like widgets, does not enable JavaScript and web page errors are ignored. If your goal is only to display some HTML as a part of your UI, this is probably fine; the user won't need to interact with the web page beyond reading it, and the web page won't need to interact with the user. If you actually want a full-blown web browser, then you probably want to invoke the Browser application with a URL Intent rather than show it with a WebView. For example:

 Uri uri = Uri.parse("http://www.example.com");
 Intent intent = new Intent(Intent.ACTION_VIEW, uri);
 startActivity(intent);

See Intent for more information.

To provide a WebView in your own Activity, include a <WebView> in your layout, or set the entire Activity window as a WebView during onCreate():

 WebView webview = new WebView(this);
 setContentView(webview);

Then load the desired web page:

 // Simplest usage: note that an exception will NOT be thrown
 // if there is an error loading this page (see below).
 webview.loadUrl("http://slashdot.org/");

 // OR, you can also load from an HTML string:
 String summary = "<html><body>You scored <b>192</b> points.</body></html>";
 webview.loadData(summary, "text/html", "utf-8");
 // ... although note that there are restrictions on what this HTML can do.
 // See the JavaDocs for loadData() and loadDataWithBaseURL() for more info.

A WebView has several customization points where you can add your own behavior. These are:

Creating and setting a WebChromeClient subclass. This class is called when something that might impact a browser UI happens, for instance, progress updates and JavaScript alerts are sent here (see Debugging Tasks).
Creating and setting a WebViewClient subclass. It will be called when things happen that impact the rendering of the content, eg, errors or form submissions. You can also intercept URL loading here (via shouldOverrideUrlLoading()).
Modifying the WebSettings, such as enabling JavaScript with setJavaScriptEnabled().
Adding JavaScript-to-Java interfaces with the addJavascriptInterface(Object, String) method. This lets you bind Java objects into the WebView so they can be controlled from the web pages JavaScript.

Here's a more complicated example, showing error handling, settings, and progress notification:

 // Let's display the progress in the activity title bar, like the
 // browser app does.
 getWindow().requestFeature(Window.FEATURE_PROGRESS);

 webview.getSettings().setJavaScriptEnabled(true);

 final Activity activity = this;
 webview.setWebChromeClient(new WebChromeClient() {
   public void onProgressChanged(WebView view, int progress) {
     // Activities and WebViews measure progress with different scales.
     // The progress meter will automatically disappear when we reach 100%
     activity.setProgress(progress * 1000);
   }
 });
 webview.setWebViewClient(new WebViewClient() {
   public void onReceivedError(WebView view, int errorCode, String description, String failingUrl) {
     Toast.makeText(activity, "Oh no! " + description, Toast.LENGTH_SHORT).show();
   }
 });

 webview.loadUrl("http://slashdot.org/");

Cookie and window management

For obvious security reasons, your application has its own cache, cookie store etc.—it does not share the Browser application's data. Cookies are managed on a separate thread, so operations like index building don't block the UI thread. Follow the instructions in CookieSyncManager if you want to use cookies in your application.

By default, requests by the HTML to open new windows are ignored. This is true whether they be opened by JavaScript or by the target attribute on a link. You can customize your WebChromeClient to provide your own behaviour for opening multiple windows, and render them in whatever manner you want.

The standard behavior for an Activity is to be destroyed and recreated when the device orientation or any other configuration changes. This will cause the WebView to reload the current page. If you don't want that, you can set your Activity to handle the orientation and keyboardHidden changes, and then just leave the WebView alone. It'll automatically re-orient itself as appropriate. Read Handling Runtime Changes for more information about how to handle configuration changes during runtime.

Building web pages to support different screen densities

The screen density of a device is based on the screen resolution. A screen with low density has fewer available pixels per inch, where a screen with high density has more — sometimes significantly more — pixels per inch. The density of a screen is important because, other things being equal, a UI element (such as a button) whose height and width are defined in terms of screen pixels will appear larger on the lower density screen and smaller on the higher density screen. For simplicity, Android collapses all actual screen densities into three generalized densities: high, medium, and low.

By default, WebView scales a web page so that it is drawn at a size that matches the default appearance on a medium density screen. So, it applies 1.5x scaling on a high density screen (because its pixels are smaller) and 0.75x scaling on a low density screen (because its pixels are bigger). Starting with API Level 5 (Android 2.0), WebView supports DOM, CSS, and meta tag features to help you (as a web developer) target screens with different screen densities.

Here's a summary of the features you can use to handle different screen densities:

The window.devicePixelRatio DOM property. The value of this property specifies the default scaling factor used for the current device. For example, if the value of window.devicePixelRatio is "1.0", then the device is considered a medium density (mdpi) device and default scaling is not applied to the web page; if the value is "1.5", then the device is considered a high density device (hdpi) and the page content is scaled 1.5x; if the value is "0.75", then the device is considered a low density device (ldpi) and the content is scaled 0.75x. However, if you specify the "target-densitydpi" meta property (discussed below), then you can stop this default scaling behavior.
The -webkit-device-pixel-ratio CSS media query. Use this to specify the screen densities for which this style sheet is to be used. The corresponding value should be either "0.75", "1", or "1.5", to indicate that the styles are for devices with low density, medium density, or high density screens, respectively. For example:
```
 <link rel="stylesheet" media="screen and (-webkit-device-pixel-ratio:1.5)" href="hdpi.css" />
```
The hdpi.css stylesheet is only used for devices with a screen pixel ration of 1.5, which is the high density pixel ratio.
The target-densitydpi property for the viewport meta tag. You can use this to specify the target density for which the web page is designed, using the following values:
- device-dpi - Use the device's native dpi as the target dpi. Default scaling never occurs.
- high-dpi - Use hdpi as the target dpi. Medium and low density screens scale down as appropriate.
- medium-dpi - Use mdpi as the target dpi. High density screens scale up and low density screens scale down. This is also the default behavior.
- low-dpi - Use ldpi as the target dpi. Medium and high density screens scale up as appropriate.
- <value> - Specify a dpi value to use as the target dpi (accepted values are 70-400).
Here's an example meta tag to specify the target density:
```
<meta name="viewport" content="target-densitydpi=device-dpi" />
```

If you want to modify your web page for different densities, by using the -webkit-device-pixel-ratio CSS media query and/or the window.devicePixelRatio DOM property, then you should set the target-densitydpi meta property to device-dpi. This stops Android from performing scaling in your web page and allows you to make the necessary adjustments for each density via CSS and JavaScript.

Summary

Nested Classes
class	WebView.HitTestResult
interface	WebView.PictureListener	Interface to listen for new pictures as they change.
class	WebView.WebViewTransport	Transportation object for returning WebView across thread boundaries.

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Inherited XML Attributes

From class android.view.ViewGroup

From class android.view.View

Constants
String	SCHEME_GEO	URI scheme for map address
String	SCHEME_MAILTO	URI scheme for email address
String	SCHEME_TEL	URI scheme for telephone number

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Inherited Constants

From class android.view.ViewGroup

From class android.view.View

Public Constructors
	WebView(Context context) Construct a new WebView with a Context object.
	WebView(Context context, AttributeSet attrs) Construct a new WebView with layout parameters.
	WebView(Context context, AttributeSet attrs, int defStyle) Construct a new WebView with layout parameters and a default style.

Public Methods
void	addJavascriptInterface(Object obj, String interfaceName) Use this function to bind an object to Javascript so that the methods can be accessed from Javascript.
boolean	canGoBack() Return true if this WebView has a back history item.
boolean	canGoBackOrForward(int steps) Return true if the page can go back or forward the given number of steps.
boolean	canGoForward() Return true if this WebView has a forward history item.
Picture	capturePicture() Return a new picture that captures the current display of the webview.
void	clearCache(boolean includeDiskFiles) Clear the resource cache.
void	clearFormData() Make sure that clearing the form data removes the adapter from the currently focused textfield if there is one.
void	clearHistory() Tell the WebView to clear its internal back/forward list.
void	clearMatches()
void	clearSslPreferences() Clear the SSL preferences table stored in response to proceeding with SSL certificate errors.
void	clearView() Clear the view so that onDraw() will draw nothing but white background, and onMeasure() will return 0 if MeasureSpec is not MeasureSpec.EXACTLY
void	computeScroll() Called by a parent to request that a child update its values for mScrollX and mScrollY if necessary.
WebBackForwardList	copyBackForwardList() Return the WebBackForwardList for this WebView.
void	debugDump()
void	destroy() Destroy the internal state of the WebView.
static void	disablePlatformNotifications() If platform notifications are enabled, this should be called from the Activity's onPause() or onStop().
boolean	dispatchKeyEvent(KeyEvent event) Dispatch a key event to the next view on the focus path.
void	documentHasImages(Message response) Query the document to see if it contains any image references.
void	draw(Canvas canvas) Manually render this view (and all of its children) to the given Canvas.
void	emulateShiftHeld() Use this method to put the WebView into text selection mode.
static void	enablePlatformNotifications() Enables platform notifications of data state and proxy changes.
static String	findAddress(String addr) Return the first substring consisting of the address of a physical location.
int	findAll(String find)
void	findNext(boolean forward)
void	flingScroll(int vx, int vy)
void	freeMemory() Call this to inform the view that memory is low so that it can free any available memory.
SslCertificate	getCertificate()
int	getContentHeight()
Bitmap	getFavicon() Get the favicon for the current page.
WebView.HitTestResult	getHitTestResult() Return a HitTestResult based on the current cursor node.
String[]	getHttpAuthUsernamePassword(String host, String realm) Retrieve the HTTP authentication username and password for a given host & realm pair
String	getOriginalUrl() Get the original url for the current page.
synchronized static PluginList	getPluginList() This method is deprecated. This was used for Gears, which has been deprecated.
int	getProgress() Get the progress for the current page.
float	getScale() Return the current scale of the WebView
WebSettings	getSettings() Return the WebSettings object used to control the settings for this WebView.
String	getTitle() Get the title for the current page.
String	getUrl() Get the url for the current page.
View	getZoomControls() This method is deprecated. The built-in zoom mechanism is preferred, see `setBuiltInZoomControls(boolean)`.
void	goBack() Go back in the history of this WebView.
void	goBackOrForward(int steps) Go to the history item that is the number of steps away from the current item.
void	goForward() Go forward in the history of this WebView.
void	invokeZoomPicker() Invoke the graphical zoom picker widget for this WebView.
void	loadData(String data, String mimeType, String encoding) Load the given data into the WebView.
void	loadDataWithBaseURL(String baseUrl, String data, String mimeType, String encoding, String historyUrl) Load the given data into the WebView, use the provided URL as the base URL for the content.
void	loadUrl(String url) Load the given url.
void	loadUrl(String url, Map<String, String> extraHeaders) Load the given url with the extra headers.
void	onChildViewAdded(View parent, View child) This method is deprecated. WebView no longer needs to implement ViewGroup.OnHierarchyChangeListener. This method does nothing now.
void	onChildViewRemoved(View p, View child) This method is deprecated. WebView no longer needs to implement ViewGroup.OnHierarchyChangeListener. This method does nothing now.
InputConnection	onCreateInputConnection(EditorInfo outAttrs) Create a new InputConnection for an InputMethod to interact with the view.
void	onGlobalFocusChanged(View oldFocus, View newFocus) This method is deprecated. WebView should not have implemented ViewTreeObserver.OnGlobalFocusChangeListener. This method does nothing now.
boolean	onKeyDown(int keyCode, KeyEvent event) Default implementation of `KeyEvent.Callback.onKeyMultiple()`: perform press of the view when `KEYCODE_DPAD_CENTER` or `KEYCODE_ENTER` is released, if the view is enabled and clickable.
boolean	onKeyMultiple(int keyCode, int repeatCount, KeyEvent event) Default implementation of `KeyEvent.Callback.onKeyMultiple()`: always returns false (doesn't handle the event).
boolean	onKeyUp(int keyCode, KeyEvent event) Default implementation of `KeyEvent.Callback.onKeyMultiple()`: perform clicking of the view when `KEYCODE_DPAD_CENTER` or `KEYCODE_ENTER` is released.
boolean	onTouchEvent(MotionEvent ev) Implement this method to handle touch screen motion events.
boolean	onTrackballEvent(MotionEvent ev) Implement this method to handle trackball motion events.
void	onWindowFocusChanged(boolean hasWindowFocus) Called when the window containing this view gains or loses focus.
boolean	overlayHorizontalScrollbar() Return whether horizontal scrollbar has overlay style
boolean	overlayVerticalScrollbar() Return whether vertical scrollbar has overlay style
boolean	pageDown(boolean bottom) Scroll the contents of the view down by half the page size
boolean	pageUp(boolean top) Scroll the contents of the view up by half the view size
void	pauseTimers() Pause all layout, parsing, and javascript timers for all webviews.
boolean	performLongClick() Call this view's OnLongClickListener, if it is defined.
void	postUrl(String url, byte[] postData) Load the url with postData using "POST" method into the WebView.
void	refreshPlugins(boolean reloadOpenPages) This method is deprecated. This was used for Gears, which has been deprecated.
void	reload() Reload the current url.
boolean	requestChildRectangleOnScreen(View child, Rect rect, boolean immediate) Called when a child of this group wants a particular rectangle to be positioned onto the screen.
boolean	requestFocus(int direction, Rect previouslyFocusedRect) Call this to try to give focus to a specific view or to one of its descendants and give it hints about the direction and a specific rectangle that the focus is coming from. Looks for a view to give focus to respecting the setting specified by `getDescendantFocusability()`.
void	requestFocusNodeHref(Message hrefMsg) Request the href of an anchor element due to getFocusNodePath returning "href." If hrefMsg is null, this method returns immediately and does not dispatch hrefMsg to its target.
void	requestImageRef(Message msg) Request the url of the image last touched by the user.
boolean	restorePicture(Bundle b, File src) Restore the display data that was save in `savePicture(Bundle, File)`.
WebBackForwardList	restoreState(Bundle inState) Restore the state of this WebView from the given map used in `onRestoreInstanceState(Bundle)`.
void	resumeTimers() Resume all layout, parsing, and javascript timers for all webviews.
void	savePassword(String host, String username, String password) Save the username and password for a particular host in the WebView's internal database.
boolean	savePicture(Bundle b, File dest) Save the current display data to the Bundle given.
WebBackForwardList	saveState(Bundle outState) Save the state of this WebView used in `onSaveInstanceState(Bundle)`.
void	setBackgroundColor(int color) Set the background color.
void	setCertificate(SslCertificate certificate) Sets the SSL certificate for the main top-level page.
void	setDownloadListener(DownloadListener listener) Register the interface to be used when content can not be handled by the rendering engine, and should be downloaded instead.
void	setHorizontalScrollbarOverlay(boolean overlay) Specify whether the horizontal scrollbar has overlay style.
void	setHttpAuthUsernamePassword(String host, String realm, String username, String password) Set the HTTP authentication credentials for a given host and realm.
void	setInitialScale(int scaleInPercent) Set the initial scale for the WebView.
void	setLayoutParams(ViewGroup.LayoutParams params) Set the layout parameters associated with this view.
void	setMapTrackballToArrowKeys(boolean setMap)
void	setNetworkAvailable(boolean networkUp) Inform WebView of the network state.
void	setOverScrollMode(int mode) Set the over-scroll mode for this view.
void	setPictureListener(WebView.PictureListener listener) Set the Picture listener.
void	setScrollBarStyle(int style) Specify the style of the scrollbars.
void	setVerticalScrollbarOverlay(boolean overlay) Specify whether the vertical scrollbar has overlay style.
void	setWebChromeClient(WebChromeClient client) Set the chrome handler.
void	setWebViewClient(WebViewClient client) Set the WebViewClient that will receive various notifications and requests.
void	stopLoading() Stop the current load.
boolean	zoomIn() Perform zoom in in the webview
boolean	zoomOut() Perform zoom out in the webview

Protected Methods
int	computeHorizontalScrollOffset() Compute the horizontal offset of the horizontal scrollbar's thumb within the horizontal range.
int	computeHorizontalScrollRange() Compute the horizontal range that the horizontal scrollbar represents.
int	computeVerticalScrollExtent() Compute the vertical extent of the horizontal scrollbar's thumb within the vertical range.
int	computeVerticalScrollOffset() Compute the vertical offset of the vertical scrollbar's thumb within the horizontal range.
int	computeVerticalScrollRange() Compute the vertical range that the vertical scrollbar represents.
boolean	drawChild(Canvas canvas, View child, long drawingTime) Draw one child of this View Group.
void	finalize() Called before the object's memory is reclaimed by the VM.
void	onAttachedToWindow() This is called when the view is attached to a window.
void	onDetachedFromWindow() This is called when the view is detached from a window.
void	onDraw(Canvas canvas) Implement this to do your drawing.
void	onFocusChanged(boolean focused, int direction, Rect previouslyFocusedRect) Called by the view system when the focus state of this view changes.
void	onMeasure(int widthMeasureSpec, int heightMeasureSpec) Measure the view and its content to determine the measured width and the measured height.
void	onOverScrolled(int scrollX, int scrollY, boolean clampedX, boolean clampedY) Called by `overScrollBy(int, int, int, int, int, int, int, int, boolean)` to respond to the results of an over-scroll operation.
void	onScrollChanged(int l, int t, int oldl, int oldt) This is called in response to an internal scroll in this view (i.e., the view scrolled its own contents).
void	onSizeChanged(int w, int h, int ow, int oh) This is called during layout when the size of this view has changed.

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Inherited Methods

From class android.widget.AbsoluteLayout

From class android.view.ViewGroup

void	addFocusables(ArrayList<View> views, int direction, int focusableMode) Adds any focusable views that are descendants of this view (possibly including this view if it is focusable itself) to views.
void	addFocusables(ArrayList<View> views, int direction) Add any focusable views that are descendants of this view (possibly including this view if it is focusable itself) to views.
boolean	addStatesFromChildren() Returns whether this ViewGroup's drawable states also include its children's drawable states.
void	addTouchables(ArrayList<View> views) Add any touchable views that are descendants of this view (possibly including this view if it is touchable itself) to views.
void	addView(View child, int index, ViewGroup.LayoutParams params) Adds a child view with the specified layout parameters.
void	addView(View child, ViewGroup.LayoutParams params) Adds a child view with the specified layout parameters.
void	addView(View child, int index) Adds a child view.
void	addView(View child) Adds a child view.
void	addView(View child, int width, int height) Adds a child view with this ViewGroup's default layout parameters and the specified width and height.
boolean	addViewInLayout(View child, int index, ViewGroup.LayoutParams params, boolean preventRequestLayout) Adds a view during layout.
boolean	addViewInLayout(View child, int index, ViewGroup.LayoutParams params) Adds a view during layout.
void	attachLayoutAnimationParameters(View child, ViewGroup.LayoutParams params, int index, int count) Subclasses should override this method to set layout animation parameters on the supplied child.
void	attachViewToParent(View child, int index, ViewGroup.LayoutParams params) Attaches a view to this view group.
void	bringChildToFront(View child) Change the z order of the child so it's on top of all other children
boolean	canAnimate() Indicates whether the view group has the ability to animate its children after the first layout.
boolean	checkLayoutParams(ViewGroup.LayoutParams p)
void	childDrawableStateChanged(View child) If {link #addStatesFromChildren} is true, refreshes this group's drawable state (to include the states from its children).
void	cleanupLayoutState(View child) Prevents the specified child to be laid out during the next layout pass.
void	clearChildFocus(View child) Called when a child of this parent is giving up focus
void	clearDisappearingChildren() Removes any pending animations for views that have been removed.
void	clearFocus() Called when this view wants to give up focus.
void	debug(int depth) Prints information about this view in the log output, with the tag `VIEW_LOG_TAG`.
void	detachAllViewsFromParent() Detaches all views from the parent.
void	detachViewFromParent(View child) Detaches a view from its parent.
void	detachViewFromParent(int index) Detaches a view from its parent.
void	detachViewsFromParent(int start, int count) Detaches a range of view from their parent.
void	dispatchConfigurationChanged(Configuration newConfig) Dispatch a notification about a resource configuration change down the view hierarchy.
void	dispatchDisplayHint(int hint) Dispatch a hint about whether this view is displayed.
void	dispatchDraw(Canvas canvas) Called by draw to draw the child views.
void	dispatchFreezeSelfOnly(SparseArray<Parcelable> container) Perform dispatching of a `freeze()` to only this view, not to its children.
boolean	dispatchKeyEvent(KeyEvent event) Dispatch a key event to the next view on the focus path.
boolean	dispatchKeyEventPreIme(KeyEvent event) Dispatch a key event before it is processed by any input method associated with the view hierarchy.
boolean	dispatchKeyShortcutEvent(KeyEvent event) Dispatches a key shortcut event.
boolean	dispatchPopulateAccessibilityEvent(AccessibilityEvent event) Dispatches an `AccessibilityEvent` to the `View` children to be populated.
void	dispatchRestoreInstanceState(SparseArray<Parcelable> container) Called by `restoreHierarchyState(SparseArray)` to retrieve the state for this view and its children.
void	dispatchSaveInstanceState(SparseArray<Parcelable> container) Called by `saveHierarchyState(SparseArray)` to store the state for this view and its children.
void	dispatchSetPressed(boolean pressed) Dispatch setPressed to all of this View's children.
void	dispatchSetSelected(boolean selected) Dispatch setSelected to all of this View's children.
void	dispatchThawSelfOnly(SparseArray<Parcelable> container) Perform dispatching of a `thaw()` to only this view, not to its children.
boolean	dispatchTouchEvent(MotionEvent ev) Pass the touch screen motion event down to the target view, or this view if it is the target.
boolean	dispatchTrackballEvent(MotionEvent event) Pass a trackball motion event down to the focused view.
boolean	dispatchUnhandledMove(View focused, int direction) This method is the last chance for the focused view and its ancestors to respond to an arrow key.
void	dispatchVisibilityChanged(View changedView, int visibility) Dispatch a view visibility change down the view hierarchy.
void	dispatchWindowFocusChanged(boolean hasFocus) Called when the window containing this view gains or loses window focus.
void	dispatchWindowVisibilityChanged(int visibility) Dispatch a window visibility change down the view hierarchy.
boolean	drawChild(Canvas canvas, View child, long drawingTime) Draw one child of this View Group.
void	drawableStateChanged() This function is called whenever the state of the view changes in such a way that it impacts the state of drawables being shown.
View	findFocus() Find the view in the hierarchy rooted at this view that currently has focus.
boolean	fitSystemWindows(Rect insets) Apply the insets for system windows to this view, if the FITS_SYSTEM_WINDOWS flag is set
View	focusSearch(View focused, int direction) Find the nearest view in the specified direction that wants to take focus.
void	focusableViewAvailable(View v) Tells the parent that a new focusable view has become available.
boolean	gatherTransparentRegion(Region region) This is used by the RootView to perform an optimization when the view hierarchy contains one or several SurfaceView.
ViewGroup.LayoutParams	generateDefaultLayoutParams() Returns a set of default layout parameters.
ViewGroup.LayoutParams	generateLayoutParams(AttributeSet attrs) Returns a new set of layout parameters based on the supplied attributes set.
ViewGroup.LayoutParams	generateLayoutParams(ViewGroup.LayoutParams p) Returns a safe set of layout parameters based on the supplied layout params.
View	getChildAt(int index) Returns the view at the specified position in the group.
int	getChildCount() Returns the number of children in the group.
int	getChildDrawingOrder(int childCount, int i) Returns the index of the child to draw for this iteration.
static int	getChildMeasureSpec(int spec, int padding, int childDimension) Does the hard part of measureChildren: figuring out the MeasureSpec to pass to a particular child.
boolean	getChildStaticTransformation(View child, Transformation t)
boolean	getChildVisibleRect(View child, Rect r, Point offset)
int	getDescendantFocusability() Gets the descendant focusability of this view group.
View	getFocusedChild() Returns the focused child of this view, if any.
LayoutAnimationController	getLayoutAnimation() Returns the layout animation controller used to animate the group's children.
Animation.AnimationListener	getLayoutAnimationListener() Returns the animation listener to which layout animation events are sent.
int	getPersistentDrawingCache() Returns an integer indicating what types of drawing caches are kept in memory.
boolean	hasFocus() Returns true if this view has or contains focus
boolean	hasFocusable() Returns true if this view is focusable or if it contains a reachable View for which `hasFocusable()` returns true.
int	indexOfChild(View child) Returns the position in the group of the specified child view.
final void	invalidateChild(View child, Rect dirty) Don't call or override this method.
ViewParent	invalidateChildInParent(int[] location, Rect dirty) Don't call or override this method.
boolean	isAlwaysDrawnWithCacheEnabled() Indicates whether this ViewGroup will always try to draw its children using their drawing cache.
boolean	isAnimationCacheEnabled() Indicates whether the children's drawing cache is used during a layout animation.
boolean	isChildrenDrawingOrderEnabled() Indicates whether the ViewGroup is drawing its children in the order defined by `getChildDrawingOrder(int, int)`.
boolean	isChildrenDrawnWithCacheEnabled() Indicates whether the ViewGroup is currently drawing its children using their drawing cache.
void	measureChild(View child, int parentWidthMeasureSpec, int parentHeightMeasureSpec) Ask one of the children of this view to measure itself, taking into account both the MeasureSpec requirements for this view and its padding.
void	measureChildWithMargins(View child, int parentWidthMeasureSpec, int widthUsed, int parentHeightMeasureSpec, int heightUsed) Ask one of the children of this view to measure itself, taking into account both the MeasureSpec requirements for this view and its padding and margins.
void	measureChildren(int widthMeasureSpec, int heightMeasureSpec) Ask all of the children of this view to measure themselves, taking into account both the MeasureSpec requirements for this view and its padding.
final void	offsetDescendantRectToMyCoords(View descendant, Rect rect) Offset a rectangle that is in a descendant's coordinate space into our coordinate space.
final void	offsetRectIntoDescendantCoords(View descendant, Rect rect) Offset a rectangle that is in our coordinate space into an ancestor's coordinate space.
void	onAnimationEnd() Invoked by a parent ViewGroup to notify the end of the animation currently associated with this view.
void	onAnimationStart() Invoked by a parent ViewGroup to notify the start of the animation currently associated with this view.
int[]	onCreateDrawableState(int extraSpace) Generate the new `Drawable` state for this view.
boolean	onInterceptTouchEvent(MotionEvent ev) Implement this method to intercept all touch screen motion events.
abstract void	onLayout(boolean changed, int l, int t, int r, int b) Called from layout when this view should assign a size and position to each of its children.
boolean	onRequestFocusInDescendants(int direction, Rect previouslyFocusedRect) Look for a descendant to call `requestFocus()` on.
void	recomputeViewAttributes(View child) Tell view hierarchy that the global view attributes need to be re-evaluated.
void	removeAllViews() Call this method to remove all child views from the ViewGroup.
void	removeAllViewsInLayout() Called by a ViewGroup subclass to remove child views from itself, when it must first know its size on screen before it can calculate how many child views it will render.
void	removeDetachedView(View child, boolean animate) Finishes the removal of a detached view.
void	removeView(View view)
void	removeViewAt(int index) Removes the view at the specified position in the group.
void	removeViewInLayout(View view) Removes a view during layout.
void	removeViews(int start, int count) Removes the specified range of views from the group.
void	removeViewsInLayout(int start, int count) Removes a range of views during layout.
void	requestChildFocus(View child, View focused) Called when a child of this parent wants focus
boolean	requestChildRectangleOnScreen(View child, Rect rectangle, boolean immediate) Called when a child of this group wants a particular rectangle to be positioned onto the screen.
void	requestDisallowInterceptTouchEvent(boolean disallowIntercept) Called when a child does not want this parent and its ancestors to intercept touch events with `onInterceptTouchEvent(MotionEvent)`.
boolean	requestFocus(int direction, Rect previouslyFocusedRect) Call this to try to give focus to a specific view or to one of its descendants and give it hints about the direction and a specific rectangle that the focus is coming from. Looks for a view to give focus to respecting the setting specified by `getDescendantFocusability()`.
void	requestTransparentRegion(View child) Called when a child wants the view hierarchy to gather and report transparent regions to the window compositor.
void	scheduleLayoutAnimation() Schedules the layout animation to be played after the next layout pass of this view group.
void	setAddStatesFromChildren(boolean addsStates) Sets whether this ViewGroup's drawable states also include its children's drawable states.
void	setAlwaysDrawnWithCacheEnabled(boolean always) Indicates whether this ViewGroup will always try to draw its children using their drawing cache.
void	setAnimationCacheEnabled(boolean enabled) Enables or disables the children's drawing cache during a layout animation.
void	setChildrenDrawingCacheEnabled(boolean enabled) Enables or disables the drawing cache for each child of this view group.
void	setChildrenDrawingOrderEnabled(boolean enabled) Tells the ViewGroup whether to draw its children in the order defined by the method `getChildDrawingOrder(int, int)`.
void	setChildrenDrawnWithCacheEnabled(boolean enabled) Tells the ViewGroup to draw its children using their drawing cache.
void	setClipChildren(boolean clipChildren) By default, children are clipped to their bounds before drawing.
void	setClipToPadding(boolean clipToPadding) By default, children are clipped to the padding of the ViewGroup.
void	setDescendantFocusability(int focusability) Set the descendant focusability of this view group.
void	setLayoutAnimation(LayoutAnimationController controller) Sets the layout animation controller used to animate the group's children after the first layout.
void	setLayoutAnimationListener(Animation.AnimationListener animationListener) Specifies the animation listener to which layout animation events must be sent.
void	setOnHierarchyChangeListener(ViewGroup.OnHierarchyChangeListener listener) Register a callback to be invoked when a child is added to or removed from this view.
void	setPadding(int left, int top, int right, int bottom) Sets the padding.
void	setPersistentDrawingCache(int drawingCacheToKeep) Indicates what types of drawing caches should be kept in memory after they have been created.
void	setStaticTransformationsEnabled(boolean enabled) When this property is set to true, this ViewGroup supports static transformations on children; this causes `getChildStaticTransformation(View, android.view.animation.Transformation)` to be invoked when a child is drawn.
boolean	showContextMenuForChild(View originalView) Bring up a context menu for the specified view or its ancestors.
void	startLayoutAnimation() Runs the layout animation.
void	updateViewLayout(View view, ViewGroup.LayoutParams params)

From class android.view.View

void	addFocusables(ArrayList<View> views, int direction) Add any focusable views that are descendants of this view (possibly including this view if it is focusable itself) to views.
void	addFocusables(ArrayList<View> views, int direction, int focusableMode) Adds any focusable views that are descendants of this view (possibly including this view if it is focusable itself) to views.
void	addTouchables(ArrayList<View> views) Add any touchable views that are descendants of this view (possibly including this view if it is touchable itself) to views.
boolean	awakenScrollBars(int startDelay) Trigger the scrollbars to draw.
boolean	awakenScrollBars(int startDelay, boolean invalidate) Trigger the scrollbars to draw.
boolean	awakenScrollBars() Trigger the scrollbars to draw.
void	bringToFront() Change the view's z order in the tree, so it's on top of other sibling views
void	buildDrawingCache(boolean autoScale) Forces the drawing cache to be built if the drawing cache is invalid.
void	buildDrawingCache() Calling this method is equivalent to calling `buildDrawingCache(false)`.
void	cancelLongPress() Cancels a pending long press.
boolean	checkInputConnectionProxy(View view) Called by the `InputMethodManager` when a view who is not the current input connection target is trying to make a call on the manager.
void	clearAnimation() Cancels any animations for this view.
void	clearFocus() Called when this view wants to give up focus.
int	computeHorizontalScrollExtent() Compute the horizontal extent of the horizontal scrollbar's thumb within the horizontal range.
int	computeHorizontalScrollOffset() Compute the horizontal offset of the horizontal scrollbar's thumb within the horizontal range.
int	computeHorizontalScrollRange() Compute the horizontal range that the horizontal scrollbar represents.
void	computeScroll() Called by a parent to request that a child update its values for mScrollX and mScrollY if necessary.
int	computeVerticalScrollExtent() Compute the vertical extent of the horizontal scrollbar's thumb within the vertical range.
int	computeVerticalScrollOffset() Compute the vertical offset of the vertical scrollbar's thumb within the horizontal range.
int	computeVerticalScrollRange() Compute the vertical range that the vertical scrollbar represents.
void	createContextMenu(ContextMenu menu) Show the context menu for this view.
void	destroyDrawingCache() Frees the resources used by the drawing cache.
void	dispatchConfigurationChanged(Configuration newConfig) Dispatch a notification about a resource configuration change down the view hierarchy.
void	dispatchDisplayHint(int hint) Dispatch a hint about whether this view is displayed.
void	dispatchDraw(Canvas canvas) Called by draw to draw the child views.
boolean	dispatchKeyEvent(KeyEvent event) Dispatch a key event to the next view on the focus path.
boolean	dispatchKeyEventPreIme(KeyEvent event) Dispatch a key event before it is processed by any input method associated with the view hierarchy.
boolean	dispatchKeyShortcutEvent(KeyEvent event) Dispatches a key shortcut event.
boolean	dispatchPopulateAccessibilityEvent(AccessibilityEvent event) Dispatches an `AccessibilityEvent` to the `View` children to be populated.
void	dispatchRestoreInstanceState(SparseArray<Parcelable> container) Called by `restoreHierarchyState(SparseArray)` to retrieve the state for this view and its children.
void	dispatchSaveInstanceState(SparseArray<Parcelable> container) Called by `saveHierarchyState(SparseArray)` to store the state for this view and its children.
void	dispatchSetPressed(boolean pressed) Dispatch setPressed to all of this View's children.
void	dispatchSetSelected(boolean selected) Dispatch setSelected to all of this View's children.
boolean	dispatchTouchEvent(MotionEvent event) Pass the touch screen motion event down to the target view, or this view if it is the target.
boolean	dispatchTrackballEvent(MotionEvent event) Pass a trackball motion event down to the focused view.
boolean	dispatchUnhandledMove(View focused, int direction) This method is the last chance for the focused view and its ancestors to respond to an arrow key.
void	dispatchVisibilityChanged(View changedView, int visibility) Dispatch a view visibility change down the view hierarchy.
void	dispatchWindowFocusChanged(boolean hasFocus) Called when the window containing this view gains or loses window focus.
void	dispatchWindowVisibilityChanged(int visibility) Dispatch a window visibility change down the view hierarchy.
void	draw(Canvas canvas) Manually render this view (and all of its children) to the given Canvas.
void	drawableStateChanged() This function is called whenever the state of the view changes in such a way that it impacts the state of drawables being shown.
View	findFocus() Find the view in the hierarchy rooted at this view that currently has focus.
final View	findViewById(int id) Look for a child view with the given id.
final View	findViewWithTag(Object tag) Look for a child view with the given tag.
boolean	fitSystemWindows(Rect insets) Apply the insets for system windows to this view, if the FITS_SYSTEM_WINDOWS flag is set
View	focusSearch(int direction) Find the nearest view in the specified direction that can take focus.
void	forceLayout() Forces this view to be laid out during the next layout pass.
Animation	getAnimation() Get the animation currently associated with this view.
IBinder	getApplicationWindowToken() Retrieve a unique token identifying the top-level "real" window of the window that this view is attached to.
Drawable	getBackground() Gets the background drawable
int	getBaseline() Return the offset of the widget's text baseline from the widget's top boundary.
final int	getBottom() Bottom position of this view relative to its parent.
float	getBottomFadingEdgeStrength() Returns the strength, or intensity, of the bottom faded edge.
int	getBottomPaddingOffset() Amount by which to extend the bottom fading region.
CharSequence	getContentDescription() Gets the `View` description.
final Context	getContext() Returns the context the view is running in, through which it can access the current theme, resources, etc.
ContextMenu.ContextMenuInfo	getContextMenuInfo() Views should implement this if they have extra information to associate with the context menu.
static int	getDefaultSize(int size, int measureSpec) Utility to return a default size.
final int[]	getDrawableState() Return an array of resource IDs of the drawable states representing the current state of the view.
Bitmap	getDrawingCache(boolean autoScale) Returns the bitmap in which this view drawing is cached.
Bitmap	getDrawingCache() Calling this method is equivalent to calling `getDrawingCache(false)`.
int	getDrawingCacheBackgroundColor()
int	getDrawingCacheQuality() Returns the quality of the drawing cache.
void	getDrawingRect(Rect outRect) Return the visible drawing bounds of your view.
long	getDrawingTime() Return the time at which the drawing of the view hierarchy started.
boolean	getFilterTouchesWhenObscured() Gets whether the framework should discard touches when the view's window is obscured by another visible window.
ArrayList<View>	getFocusables(int direction) Find and return all focusable views that are descendants of this view, possibly including this view if it is focusable itself.
void	getFocusedRect(Rect r) When a view has focus and the user navigates away from it, the next view is searched for starting from the rectangle filled in by this method.
boolean	getGlobalVisibleRect(Rect r, Point globalOffset) If some part of this view is not clipped by any of its parents, then return that area in r in global (root) coordinates.
final boolean	getGlobalVisibleRect(Rect r)
Handler	getHandler()
final int	getHeight() Return the height of your view.
void	getHitRect(Rect outRect) Hit rectangle in parent's coordinates
int	getHorizontalFadingEdgeLength() Returns the size of the horizontal faded edges used to indicate that more content in this view is visible.
int	getHorizontalScrollbarHeight() Returns the height of the horizontal scrollbar.
int	getId() Returns this view's identifier.
boolean	getKeepScreenOn() Returns whether the screen should remain on, corresponding to the current value of `KEEP_SCREEN_ON`.
KeyEvent.DispatcherState	getKeyDispatcherState() Return the global `KeyEvent.DispatcherState` for this view's window.
ViewGroup.LayoutParams	getLayoutParams() Get the LayoutParams associated with this view.
final int	getLeft() Left position of this view relative to its parent.
float	getLeftFadingEdgeStrength() Returns the strength, or intensity, of the left faded edge.
int	getLeftPaddingOffset() Amount by which to extend the left fading region.
final boolean	getLocalVisibleRect(Rect r)
void	getLocationInWindow(int[] location) Computes the coordinates of this view in its window.
void	getLocationOnScreen(int[] location) Computes the coordinates of this view on the screen.
final int	getMeasuredHeight() The height of this view as measured in the most recent call to measure().
final int	getMeasuredWidth() The width of this view as measured in the most recent call to measure().
int	getNextFocusDownId()
int	getNextFocusLeftId()
int	getNextFocusRightId()
int	getNextFocusUpId()
View.OnFocusChangeListener	getOnFocusChangeListener() Returns the focus-change callback registered for this view.
int	getOverScrollMode() Returns the over-scroll mode for this view.
int	getPaddingBottom() Returns the bottom padding of this view.
int	getPaddingLeft() Returns the left padding of this view.
int	getPaddingRight() Returns the right padding of this view.
int	getPaddingTop() Returns the top padding of this view.
final ViewParent	getParent() Gets the parent of this view.
Resources	getResources() Returns the resources associated with this view.
final int	getRight() Right position of this view relative to its parent.
float	getRightFadingEdgeStrength() Returns the strength, or intensity, of the right faded edge.
int	getRightPaddingOffset() Amount by which to extend the right fading region.
View	getRootView() Finds the topmost view in the current view hierarchy.
int	getScrollBarStyle() Returns the current scrollbar style.
final int	getScrollX() Return the scrolled left position of this view.
final int	getScrollY() Return the scrolled top position of this view.
int	getSolidColor() Override this if your view is known to always be drawn on top of a solid color background, and needs to draw fading edges.
int	getSuggestedMinimumHeight() Returns the suggested minimum height that the view should use.
int	getSuggestedMinimumWidth() Returns the suggested minimum width that the view should use.
Object	getTag(int key) Returns the tag associated with this view and the specified key.
Object	getTag() Returns this view's tag.
final int	getTop() Top position of this view relative to its parent.
float	getTopFadingEdgeStrength() Returns the strength, or intensity, of the top faded edge.
int	getTopPaddingOffset() Amount by which to extend the top fading region.
TouchDelegate	getTouchDelegate() Gets the TouchDelegate for this View.
ArrayList<View>	getTouchables() Find and return all touchable views that are descendants of this view, possibly including this view if it is touchable itself.
int	getVerticalFadingEdgeLength() Returns the size of the vertical faded edges used to indicate that more content in this view is visible.
int	getVerticalScrollbarWidth() Returns the width of the vertical scrollbar.
ViewTreeObserver	getViewTreeObserver() Returns the ViewTreeObserver for this view's hierarchy.
int	getVisibility() Returns the visibility status for this view.
final int	getWidth() Return the width of the your view.
int	getWindowAttachCount()
IBinder	getWindowToken() Retrieve a unique token identifying the window this view is attached to.
int	getWindowVisibility() Returns the current visibility of the window this view is attached to (either `GONE`, `INVISIBLE`, or `VISIBLE`).
void	getWindowVisibleDisplayFrame(Rect outRect) Retrieve the overall visible display size in which the window this view is attached to has been positioned in.
boolean	hasFocus() Returns true if this view has focus iteself, or is the ancestor of the view that has focus.
boolean	hasFocusable() Returns true if this view is focusable or if it contains a reachable View for which `hasFocusable()` returns true.
boolean	hasWindowFocus() Returns true if this view is in a window that currently has window focus.
static View	inflate(Context context, int resource, ViewGroup root) Inflate a view from an XML resource.
void	initializeFadingEdge(TypedArray a) Initializes the fading edges from a given set of styled attributes.
void	initializeScrollbars(TypedArray a) Initializes the scrollbars from a given set of styled attributes.
void	invalidate(Rect dirty) Mark the the area defined by dirty as needing to be drawn.
void	invalidate(int l, int t, int r, int b) Mark the the area defined by the rect (l,t,r,b) as needing to be drawn.
void	invalidate() Invalidate the whole view.
void	invalidateDrawable(Drawable drawable) Invalidates the specified Drawable.
boolean	isClickable() Indicates whether this view reacts to click events or not.
boolean	isDrawingCacheEnabled() Indicates whether the drawing cache is enabled for this view.
boolean	isDuplicateParentStateEnabled() Indicates whether this duplicates its drawable state from its parent.
boolean	isEnabled() Returns the enabled status for this view.
final boolean	isFocusable() Returns whether this View is able to take focus.
final boolean	isFocusableInTouchMode() When a view is focusable, it may not want to take focus when in touch mode.
boolean	isFocused() Returns true if this view has focus
boolean	isHapticFeedbackEnabled()
boolean	isHorizontalFadingEdgeEnabled() Indicate whether the horizontal edges are faded when the view is scrolled horizontally.
boolean	isHorizontalScrollBarEnabled() Indicate whether the horizontal scrollbar should be drawn or not.
boolean	isInEditMode() Indicates whether this View is currently in edit mode.
boolean	isInTouchMode() Returns whether the device is currently in touch mode.
boolean	isLayoutRequested() Indicates whether or not this view's layout will be requested during the next hierarchy layout pass.
boolean	isLongClickable() Indicates whether this view reacts to long click events or not.
boolean	isOpaque() Indicates whether this View is opaque.
boolean	isPaddingOffsetRequired() If the View draws content inside its padding and enables fading edges, it needs to support padding offsets.
boolean	isPressed() Indicates whether the view is currently in pressed state.
boolean	isSaveEnabled() Indicates whether this view will save its state (that is, whether its `onSaveInstanceState()` method will be called).
boolean	isScrollbarFadingEnabled() Returns true if scrollbars will fade when this view is not scrolling
boolean	isSelected() Indicates the selection state of this view.
boolean	isShown() Returns the visibility of this view and all of its ancestors
boolean	isSoundEffectsEnabled()
boolean	isVerticalFadingEdgeEnabled() Indicate whether the vertical edges are faded when the view is scrolled horizontally.
boolean	isVerticalScrollBarEnabled() Indicate whether the vertical scrollbar should be drawn or not.
final void	layout(int l, int t, int r, int b) Assign a size and position to a view and all of its descendants This is the second phase of the layout mechanism.
final void	measure(int widthMeasureSpec, int heightMeasureSpec) This is called to find out how big a view should be.
static int[]	mergeDrawableStates(int[] baseState, int[] additionalState) Merge your own state values in `additionalState` into the base state values `baseState` that were returned by `onCreateDrawableState(int)`.
void	offsetLeftAndRight(int offset) Offset this view's horizontal location by the specified amount of pixels.
void	offsetTopAndBottom(int offset) Offset this view's vertical location by the specified number of pixels.
void	onAnimationEnd() Invoked by a parent ViewGroup to notify the end of the animation currently associated with this view.
void	onAnimationStart() Invoked by a parent ViewGroup to notify the start of the animation currently associated with this view.
void	onAttachedToWindow() This is called when the view is attached to a window.
boolean	onCheckIsTextEditor() Check whether the called view is a text editor, in which case it would make sense to automatically display a soft input window for it.
void	onConfigurationChanged(Configuration newConfig) Called when the current configuration of the resources being used by the application have changed.
void	onCreateContextMenu(ContextMenu menu) Views should implement this if the view itself is going to add items to the context menu.
int[]	onCreateDrawableState(int extraSpace) Generate the new `Drawable` state for this view.
InputConnection	onCreateInputConnection(EditorInfo outAttrs) Create a new InputConnection for an InputMethod to interact with the view.
void	onDetachedFromWindow() This is called when the view is detached from a window.
void	onDisplayHint(int hint) Gives this view a hint about whether is displayed or not.
void	onDraw(Canvas canvas) Implement this to do your drawing.
final void	onDrawScrollBars(Canvas canvas) Request the drawing of the horizontal and the vertical scrollbar.
boolean	onFilterTouchEventForSecurity(MotionEvent event) Filter the touch event to apply security policies.
void	onFinishInflate() Finalize inflating a view from XML.
void	onFinishTemporaryDetach() Called after `onStartTemporaryDetach()` when the container is done changing the view.
void	onFocusChanged(boolean gainFocus, int direction, Rect previouslyFocusedRect) Called by the view system when the focus state of this view changes.
boolean	onKeyDown(int keyCode, KeyEvent event) Default implementation of `KeyEvent.Callback.onKeyMultiple()`: perform press of the view when `KEYCODE_DPAD_CENTER` or `KEYCODE_ENTER` is released, if the view is enabled and clickable.
boolean	onKeyLongPress(int keyCode, KeyEvent event) Default implementation of `KeyEvent.Callback.onKeyLongPress()`: always returns false (doesn't handle the event).
boolean	onKeyMultiple(int keyCode, int repeatCount, KeyEvent event) Default implementation of `KeyEvent.Callback.onKeyMultiple()`: always returns false (doesn't handle the event).
boolean	onKeyPreIme(int keyCode, KeyEvent event) Handle a key event before it is processed by any input method associated with the view hierarchy.
boolean	onKeyShortcut(int keyCode, KeyEvent event) Called when an unhandled key shortcut event occurs.
boolean	onKeyUp(int keyCode, KeyEvent event) Default implementation of `KeyEvent.Callback.onKeyMultiple()`: perform clicking of the view when `KEYCODE_DPAD_CENTER` or `KEYCODE_ENTER` is released.
void	onLayout(boolean changed, int left, int top, int right, int bottom) Called from layout when this view should assign a size and position to each of its children.
void	onMeasure(int widthMeasureSpec, int heightMeasureSpec) Measure the view and its content to determine the measured width and the measured height.
void	onOverScrolled(int scrollX, int scrollY, boolean clampedX, boolean clampedY) Called by `overScrollBy(int, int, int, int, int, int, int, int, boolean)` to respond to the results of an over-scroll operation.
void	onRestoreInstanceState(Parcelable state) Hook allowing a view to re-apply a representation of its internal state that had previously been generated by `onSaveInstanceState()`.
Parcelable	onSaveInstanceState() Hook allowing a view to generate a representation of its internal state that can later be used to create a new instance with that same state.
void	onScrollChanged(int l, int t, int oldl, int oldt) This is called in response to an internal scroll in this view (i.e., the view scrolled its own contents).
boolean	onSetAlpha(int alpha) Invoked if there is a Transform that involves alpha.
void	onSizeChanged(int w, int h, int oldw, int oldh) This is called during layout when the size of this view has changed.
void	onStartTemporaryDetach() This is called when a container is going to temporarily detach a child, with `ViewGroup.detachViewFromParent`.
boolean	onTouchEvent(MotionEvent event) Implement this method to handle touch screen motion events.
boolean	onTrackballEvent(MotionEvent event) Implement this method to handle trackball motion events.
void	onVisibilityChanged(View changedView, int visibility) Called when the visibility of the view or an ancestor of the view is changed.
void	onWindowFocusChanged(boolean hasWindowFocus) Called when the window containing this view gains or loses focus.
void	onWindowVisibilityChanged(int visibility) Called when the window containing has change its visibility (between `GONE`, `INVISIBLE`, and `VISIBLE`).
boolean	overScrollBy(int deltaX, int deltaY, int scrollX, int scrollY, int scrollRangeX, int scrollRangeY, int maxOverScrollX, int maxOverScrollY, boolean isTouchEvent) Scroll the view with standard behavior for scrolling beyond the normal content boundaries.
boolean	performClick() Call this view's OnClickListener, if it is defined.
boolean	performHapticFeedback(int feedbackConstant, int flags) BZZZTT!!1! Like `performHapticFeedback(int)`, with additional options.
boolean	performHapticFeedback(int feedbackConstant) BZZZTT!!1! Provide haptic feedback to the user for this view.
boolean	performLongClick() Call this view's OnLongClickListener, if it is defined.
void	playSoundEffect(int soundConstant) Play a sound effect for this view.
boolean	post(Runnable action) Causes the Runnable to be added to the message queue.
boolean	postDelayed(Runnable action, long delayMillis) Causes the Runnable to be added to the message queue, to be run after the specified amount of time elapses.
void	postInvalidate(int left, int top, int right, int bottom) Cause an invalidate of the specified area to happen on a subsequent cycle through the event loop.
void	postInvalidate() Cause an invalidate to happen on a subsequent cycle through the event loop.
void	postInvalidateDelayed(long delayMilliseconds, int left, int top, int right, int bottom) Cause an invalidate of the specified area to happen on a subsequent cycle through the event loop.
void	postInvalidateDelayed(long delayMilliseconds) Cause an invalidate to happen on a subsequent cycle through the event loop.
void	refreshDrawableState() Call this to force a view to update its drawable state.
boolean	removeCallbacks(Runnable action) Removes the specified Runnable from the message queue.
boolean	requestFocus(int direction, Rect previouslyFocusedRect) Call this to try to give focus to a specific view or to one of its descendants and give it hints about the direction and a specific rectangle that the focus is coming from.
final boolean	requestFocus(int direction) Call this to try to give focus to a specific view or to one of its descendants and give it a hint about what direction focus is heading.
final boolean	requestFocus() Call this to try to give focus to a specific view or to one of its descendants.
final boolean	requestFocusFromTouch() Call this to try to give focus to a specific view or to one of its descendants.
void	requestLayout() Call this when something has changed which has invalidated the layout of this view.
boolean	requestRectangleOnScreen(Rect rectangle) Request that a rectangle of this view be visible on the screen, scrolling if necessary just enough.
boolean	requestRectangleOnScreen(Rect rectangle, boolean immediate) Request that a rectangle of this view be visible on the screen, scrolling if necessary just enough.
static int	resolveSize(int size, int measureSpec) Utility to reconcile a desired size with constraints imposed by a MeasureSpec.
void	restoreHierarchyState(SparseArray<Parcelable> container) Restore this view hierarchy's frozen state from the given container.
void	saveHierarchyState(SparseArray<Parcelable> container) Store this view hierarchy's frozen state into the given container.
void	scheduleDrawable(Drawable who, Runnable what, long when) Schedules an action on a drawable to occur at a specified time.
void	scrollBy(int x, int y) Move the scrolled position of your view.
void	scrollTo(int x, int y) Set the scrolled position of your view.
void	sendAccessibilityEvent(int eventType) Handles the request for sending an `AccessibilityEvent` given the event type.
void	sendAccessibilityEventUnchecked(AccessibilityEvent event) Handles the request for sending an `AccessibilityEvent`.
void	setAnimation(Animation animation) Sets the next animation to play for this view.
void	setBackgroundColor(int color) Sets the background color for this view.
void	setBackgroundDrawable(Drawable d) Set the background to a given Drawable, or remove the background.
void	setBackgroundResource(int resid) Set the background to a given resource.
void	setClickable(boolean clickable) Enables or disables click events for this view.
void	setContentDescription(CharSequence contentDescription) Sets the `View` description.
void	setDrawingCacheBackgroundColor(int color) Setting a solid background color for the drawing cache's bitmaps will improve perfromance and memory usage.
void	setDrawingCacheEnabled(boolean enabled) Enables or disables the drawing cache.
void	setDrawingCacheQuality(int quality) Set the drawing cache quality of this view.
void	setDuplicateParentStateEnabled(boolean enabled) Enables or disables the duplication of the parent's state into this view.
void	setEnabled(boolean enabled) Set the enabled state of this view.
void	setFadingEdgeLength(int length) Set the size of the faded edge used to indicate that more content in this view is available.
void	setFilterTouchesWhenObscured(boolean enabled) Sets whether the framework should discard touches when the view's window is obscured by another visible window.
void	setFocusable(boolean focusable) Set whether this view can receive the focus.
void	setFocusableInTouchMode(boolean focusableInTouchMode) Set whether this view can receive focus while in touch mode.
void	setHapticFeedbackEnabled(boolean hapticFeedbackEnabled) Set whether this view should have haptic feedback for events such as long presses.
void	setHorizontalFadingEdgeEnabled(boolean horizontalFadingEdgeEnabled) Define whether the horizontal edges should be faded when this view is scrolled horizontally.
void	setHorizontalScrollBarEnabled(boolean horizontalScrollBarEnabled) Define whether the horizontal scrollbar should be drawn or not.
void	setId(int id) Sets the identifier for this view.
void	setKeepScreenOn(boolean keepScreenOn) Controls whether the screen should remain on, modifying the value of `KEEP_SCREEN_ON`.
void	setLayoutParams(ViewGroup.LayoutParams params) Set the layout parameters associated with this view.
void	setLongClickable(boolean longClickable) Enables or disables long click events for this view.
final void	setMeasuredDimension(int measuredWidth, int measuredHeight) This mehod must be called by `onMeasure(int, int)` to store the measured width and measured height.
void	setMinimumHeight(int minHeight) Sets the minimum height of the view.
void	setMinimumWidth(int minWidth) Sets the minimum width of the view.
void	setNextFocusDownId(int nextFocusDownId) Set the id of the view to use for the next focus
void	setNextFocusLeftId(int nextFocusLeftId) Set the id of the view to use for the next focus
void	setNextFocusRightId(int nextFocusRightId) Set the id of the view to use for the next focus
void	setNextFocusUpId(int nextFocusUpId) Set the id of the view to use for the next focus
void	setOnClickListener(View.OnClickListener l) Register a callback to be invoked when this view is clicked.
void	setOnCreateContextMenuListener(View.OnCreateContextMenuListener l) Register a callback to be invoked when the context menu for this view is being built.
void	setOnFocusChangeListener(View.OnFocusChangeListener l) Register a callback to be invoked when focus of this view changed.
void	setOnKeyListener(View.OnKeyListener l) Register a callback to be invoked when a key is pressed in this view.
void	setOnLongClickListener(View.OnLongClickListener l) Register a callback to be invoked when this view is clicked and held.
void	setOnTouchListener(View.OnTouchListener l) Register a callback to be invoked when a touch event is sent to this view.
void	setOverScrollMode(int overScrollMode) Set the over-scroll mode for this view.
void	setPadding(int left, int top, int right, int bottom) Sets the padding.
void	setPressed(boolean pressed) Sets the pressed that for this view.
void	setSaveEnabled(boolean enabled) Controls whether the saving of this view's state is enabled (that is, whether its `onSaveInstanceState()` method will be called).
void	setScrollBarStyle(int style) Specify the style of the scrollbars.
void	setScrollContainer(boolean isScrollContainer) Change whether this view is one of the set of scrollable containers in its window.
void	setScrollbarFadingEnabled(boolean fadeScrollbars) Define whether scrollbars will fade when the view is not scrolling.
void	setSelected(boolean selected) Changes the selection state of this view.
void	setSoundEffectsEnabled(boolean soundEffectsEnabled) Set whether this view should have sound effects enabled for events such as clicking and touching.
void	setTag(int key, Object tag) Sets a tag associated with this view and a key.
void	setTag(Object tag) Sets the tag associated with this view.
void	setTouchDelegate(TouchDelegate delegate) Sets the TouchDelegate for this View.
void	setVerticalFadingEdgeEnabled(boolean verticalFadingEdgeEnabled) Define whether the vertical edges should be faded when this view is scrolled vertically.
void	setVerticalScrollBarEnabled(boolean verticalScrollBarEnabled) Define whether the vertical scrollbar should be drawn or not.
void	setVisibility(int visibility) Set the enabled state of this view.
void	setWillNotCacheDrawing(boolean willNotCacheDrawing) When a View's drawing cache is enabled, drawing is redirected to an offscreen bitmap.
void	setWillNotDraw(boolean willNotDraw) If this view doesn't do any drawing on its own, set this flag to allow further optimizations.
boolean	showContextMenu() Bring up the context menu for this view.
void	startAnimation(Animation animation) Start the specified animation now.
void	unscheduleDrawable(Drawable who) Unschedule any events associated with the given Drawable.
void	unscheduleDrawable(Drawable who, Runnable what) Cancels a scheduled action on a drawable.
boolean	verifyDrawable(Drawable who) If your view subclass is displaying its own Drawable objects, it should override this function and return true for any Drawable it is displaying.
boolean	willNotCacheDrawing() Returns whether or not this View can cache its drawing or not.
boolean	willNotDraw() Returns whether or not this View draws on its own.

From class java.lang.Object

Object	clone() Creates and returns a copy of this `Object`.
boolean	equals(Object o) Compares this instance with the specified object and indicates if they are equal.
void	finalize() Called before the object's memory is reclaimed by the VM.
final Class<? extends Object>	getClass() Returns the unique instance of `Class` that represents this object's class.
int	hashCode() Returns an integer hash code for this object.
final void	notify() Causes a thread which is waiting on this object's monitor (by means of calling one of the `wait()` methods) to be woken up.
final void	notifyAll() Causes all threads which are waiting on this object's monitor (by means of calling one of the `wait()` methods) to be woken up.
String	toString() Returns a string containing a concise, human-readable description of this object.
final void	wait() Causes the calling thread to wait until another thread calls the `notify()` or `notifyAll()` method of this object.
final void	wait(long millis, int nanos) Causes the calling thread to wait until another thread calls the `notify()` or `notifyAll()` method of this object or until the specified timeout expires.
final void	wait(long millis) Causes the calling thread to wait until another thread calls the `notify()` or `notifyAll()` method of this object or until the specified timeout expires.

From interface android.graphics.drawable.Drawable.Callback

From interface android.view.KeyEvent.Callback

From interface android.view.ViewGroup.OnHierarchyChangeListener

From interface android.view.ViewManager

From interface android.view.ViewParent

abstract void	bringChildToFront(View child) Change the z order of the child so it's on top of all other children
abstract void	childDrawableStateChanged(View child) This method is called on the parent when a child's drawable state has changed.
abstract void	clearChildFocus(View child) Called when a child of this parent is giving up focus
abstract void	createContextMenu(ContextMenu menu) Have the parent populate the specified context menu if it has anything to add (and then recurse on its parent).
abstract View	focusSearch(View v, int direction) Find the nearest view in the specified direction that wants to take focus
abstract void	focusableViewAvailable(View v) Tells the parent that a new focusable view has become available.
abstract boolean	getChildVisibleRect(View child, Rect r, Point offset)
abstract ViewParent	getParent() Returns the parent if it exists, or null.
abstract void	invalidateChild(View child, Rect r) All or part of a child is dirty and needs to be redrawn.
abstract ViewParent	invalidateChildInParent(int[] location, Rect r) All or part of a child is dirty and needs to be redrawn.
abstract boolean	isLayoutRequested() Indicates whether layout was requested on this view parent.
abstract void	recomputeViewAttributes(View child) Tell view hierarchy that the global view attributes need to be re-evaluated.
abstract void	requestChildFocus(View child, View focused) Called when a child of this parent wants focus
abstract boolean	requestChildRectangleOnScreen(View child, Rect rectangle, boolean immediate) Called when a child of this group wants a particular rectangle to be positioned onto the screen.
abstract void	requestDisallowInterceptTouchEvent(boolean disallowIntercept) Called when a child does not want this parent and its ancestors to intercept touch events with `onInterceptTouchEvent(MotionEvent)`.
abstract void	requestLayout() Called when something has changed which has invalidated the layout of a child of this view parent.
abstract void	requestTransparentRegion(View child) Called when a child wants the view hierarchy to gather and report transparent regions to the window compositor.
abstract boolean	showContextMenuForChild(View originalView) Bring up a context menu for the specified view or its ancestors.

From interface android.view.ViewTreeObserver.OnGlobalFocusChangeListener

From interface android.view.accessibility.AccessibilityEventSource

Constants

public static final String SCHEME_GEO

Since: API Level 1

URI scheme for map address

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

public static final String SCHEME_MAILTO

Since: API Level 1

URI scheme for email address

Constant Value: "mailto:"

public static final String SCHEME_TEL

Since: API Level 1

URI scheme for telephone number

Constant Value: "tel:"

Public Constructors

public WebView (Context context)

Since: API Level 1

Construct a new WebView with a Context object.

Parameters

context	A Context object used to access application assets.

public WebView (Context context, AttributeSet attrs)

Since: API Level 1

Construct a new WebView with layout parameters.

Parameters

context	A Context object used to access application assets.
attrs	An AttributeSet passed to our parent.

public WebView (Context context, AttributeSet attrs, int defStyle)

Since: API Level 1

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

Parameters

context	A Context object used to access application assets.
attrs	An AttributeSet passed to our parent.
defStyle	The default style resource ID.

Public Methods

public void addJavascriptInterface (Object obj, String interfaceName)

Since: API Level 1

Use this function to bind an object to Javascript so that the methods can be accessed from Javascript.

IMPORTANT:

Using addJavascriptInterface() allows JavaScript to control your application. This can be a very useful feature or a dangerous security issue. When the HTML in the WebView is untrustworthy (for example, part or all of the HTML is provided by some person or process), then an attacker could inject HTML that will execute your code and possibly any code of the attacker's choosing.
Do not use addJavascriptInterface() unless all of the HTML in this WebView was written by you.
The Java object that is bound runs in another thread and not in the thread that it was constructed in.

Parameters

obj	The class instance to bind to Javascript
interfaceName	The name to used to expose the class in Javascript

public boolean canGoBack ()

Since: API Level 1

Return true if this WebView has a back history item.

Returns

True iff this WebView has a back history item.

public boolean canGoBackOrForward (int steps)

Since: API Level 1

Return true if the page can go back or forward the given number of steps.

Parameters

steps	The negative or positive number of steps to move the history.

public boolean canGoForward ()

Since: API Level 1

Return true if this WebView has a forward history item.

Returns

True iff this Webview has a forward history item.

public Picture capturePicture ()

Since: API Level 1

Return a new picture that captures the current display of the webview. This is a copy of the display, and will be unaffected if the webview later loads a different URL.

Returns

a picture containing the current contents of the view. Note this picture is of the entire document, and is not restricted to the bounds of the view.

public void clearCache (boolean includeDiskFiles)

Since: API Level 1

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

Parameters

includeDiskFiles	If false, only the RAM cache is cleared.

public void clearFormData ()

Since: API Level 1

Make sure that clearing the form data removes the adapter from the currently focused textfield if there is one.

public void clearHistory ()

Since: API Level 1

Tell the WebView to clear its internal back/forward list.

public void clearMatches ()

Since: API Level 3

public void clearSslPreferences ()

Since: API Level 1

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

public void clearView ()

Since: API Level 1

Clear the view so that onDraw() will draw nothing but white background, and onMeasure() will return 0 if MeasureSpec is not MeasureSpec.EXACTLY

public void computeScroll ()

Since: API Level 1

Called by a parent to request that a child update its values for mScrollX and mScrollY if necessary. This will typically be done if the child is animating a scroll using a Scroller object.

public WebBackForwardList copyBackForwardList ()

Since: API Level 1

Return 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.

public void debugDump ()

Since: API Level 1

public void destroy ()

Since: API Level 1

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

public static void disablePlatformNotifications ()

Since: API Level 1

If platform notifications are enabled, this should be called from the Activity's onPause() or onStop().

public boolean dispatchKeyEvent (KeyEvent event)

Since: API Level 1

Dispatch a key event to the next view on the focus path. This path runs from the top of the view tree down to the currently focused view. If this view has focus, it will dispatch to itself. Otherwise it will dispatch the next node down the focus path. This method also fires any key listeners.

Parameters

event	The key event to be dispatched.

Returns

True if the event was handled, false otherwise.

public void documentHasImages (Message response)

Since: API Level 1

Query 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	The message that will be dispatched with the result.

public void draw (Canvas canvas)

Since: API Level 1

Manually render this view (and all of its children) to the given Canvas. The view must have already done a full layout before this function is called. When implementing a view, do not override this method; instead, you should implement onDraw(Canvas).

Parameters

canvas	The Canvas to which the View is rendered.

public void emulateShiftHeld ()

Since: API Level 8

Use this method to put the WebView into text selection mode. Do not rely on this functionality; it will be deprecated in the future.

public static void enablePlatformNotifications ()

Since: API Level 1

Enables platform notifications of data state and proxy changes.

public static String findAddress (String addr)

Since: API Level 1

Return the first substring consisting of the address of a physical location. Currently, only addresses in the United States are detected, and 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.

Parameters

addr	The string to search for addresses.

Returns

the address, or if no address is found, return null.

public int findAll (String find)

Since: API Level 3

public void findNext (boolean forward)

Since: API Level 3

public void flingScroll (int vx, int vy)

Since: API Level 1

public void freeMemory ()

Since: API Level 7

Call this to inform the view that memory is low so that it can free any available memory.

public SslCertificate getCertificate ()

Since: API Level 1

Returns

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

public int getContentHeight ()

Since: API Level 1

Returns

the height of the HTML content.

public Bitmap getFavicon ()

Since: API Level 1

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

Returns

The favicon for the current page.

public WebView.HitTestResult getHitTestResult ()

Since: API Level 1

Return 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(Message) 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.

public String[] getHttpAuthUsernamePassword (String host, String realm)

Since: API Level 1

Retrieve the HTTP authentication username and password for a given host & realm pair

Parameters

host	The host for which the credentials apply.
realm	The realm for which the credentials apply.

Returns

String[] if found, String[0] is username, which can be null and String[1] is password. Return null if it can't find anything.

public String getOriginalUrl ()

Since: API Level 3

Get 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.

Returns

The url that was originally requested for the current page.

public static synchronized PluginList getPluginList ()

Since: API Level 1

This method is deprecated.
This was used for Gears, which has been deprecated.

Return the list of currently loaded plugins.

Returns

The list of currently loaded plugins.

public int getProgress ()

Since: API Level 1

Get the progress for the current page.

Returns

The progress for the current page between 0 and 100.

public float getScale ()

Since: API Level 1

Return the current scale of the WebView

Returns

The current scale.

public WebSettings getSettings ()

Since: API Level 1

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

Returns

A WebSettings object that can be used to control this WebView's settings.

public String getTitle ()

Since: API Level 1

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

Returns

The title for the current page.

public String getUrl ()

Since: API Level 1

Get 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.

Returns

The url for the current page.

public View getZoomControls ()

Since: API Level 1

This method is deprecated.
The built-in zoom mechanism is preferred, see setBuiltInZoomControls(boolean).

Returns a view containing zoom controls i.e. +/- buttons. The caller is in charge of installing this view to the view hierarchy. This view will become visible when the user starts scrolling via touch and fade away if the user does not interact with it.

API version 3 introduces a built-in zoom mechanism that is shown automatically by the MapView. This is the preferred approach for showing the zoom UI.

public void goBack ()

Since: API Level 1

Go back in the history of this WebView.

public void goBackOrForward (int steps)

Since: API Level 1

Go 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	The number of steps to take back or forward in the back forward list.

public void goForward ()

Since: API Level 1

Go forward in the history of this WebView.

public void invokeZoomPicker ()

Since: API Level 1

Invoke 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.

public void loadData (String data, String mimeType, String encoding)

Since: API Level 1

Load the given data into the WebView. This will load the data into WebView using the data: scheme. Content loaded through this mechanism does not have the ability to load content from the network.

Parameters

data	A String of data in the given encoding. The date must be URI-escaped -- '#', '%', '\', '?' should be replaced by %23, %25, %27, %3f respectively.
mimeType	The MIMEType of the data. i.e. text/html, image/jpeg
encoding	The encoding of the data. i.e. utf-8, base64

public void loadDataWithBaseURL (String baseUrl, String data, String mimeType, String encoding, String historyUrl)

Since: API Level 1

Load the given data into the WebView, use the provided URL as the base URL for the content. The base URL is the URL that represents the page that is loaded through this interface. As such, it is used to resolve any relative URLs. The historyUrl is used for the history entry.

Note for post 1.0. Due to the change in the WebKit, the access to asset files through "file:///android_asset/" for the sub resources is more restricted. If you provide null or empty string as baseUrl, you won't be able to access asset files. If the baseUrl is anything other than http(s)/ftp(s)/about/javascript as scheme, you can access asset files for sub resources.

Parameters

baseUrl	Url to resolve relative paths with, if null defaults to "about:blank"
data	A String of data in the given encoding.
mimeType	The MIMEType of the data. i.e. text/html. If null, defaults to "text/html"
encoding	The encoding of the data. i.e. utf-8, us-ascii
historyUrl	URL to use as the history entry. Can be null.

public void loadUrl (String url)

Since: API Level 1

Load the given url.

Parameters

url	The url of the resource to load.

public void loadUrl (String url, Map<String, String> extraHeaders)

Since: API Level 8

Load the given url with the extra headers.

Parameters

url	The url of the resource to load.
extraHeaders	The extra headers sent with this url. This should not include the common headers like "user-agent". If it does, it will be replaced by the intrinsic value of the WebView.

public void onChildViewAdded (View parent, View child)

Since: API Level 1

This method is deprecated.
WebView no longer needs to implement ViewGroup.OnHierarchyChangeListener. This method does nothing now.

Called when a new child is added to a parent view.

Parameters

parent	the view in which a child was added
child	the new child view added in the hierarchy

public void onChildViewRemoved (View p, View child)

Since: API Level 1

This method is deprecated.
WebView no longer needs to implement ViewGroup.OnHierarchyChangeListener. This method does nothing now.

Called when a child is removed from a parent view.

Parameters

p	the view from which the child was removed
child	the child removed from the hierarchy

public InputConnection onCreateInputConnection (EditorInfo outAttrs)

Since: API Level 3

Create a new InputConnection for an InputMethod to interact with the view. The default implementation returns null, since it doesn't support input methods. You can override this to implement such support. This is only needed for views that take focus and text input.

When implementing this, you probably also want to implement onCheckIsTextEditor() to indicate you will return a non-null InputConnection.

Parameters

outAttrs	Fill in with attribute information about the connection.

public void onGlobalFocusChanged (View oldFocus, View newFocus)

Since: API Level 1

This method is deprecated.
WebView should not have implemented ViewTreeObserver.OnGlobalFocusChangeListener. This method does nothing now.

Callback method to be invoked when the focus changes in the view tree. When the view tree transitions from touch mode to non-touch mode, oldFocus is null. When the view tree transitions from non-touch mode to touch mode, newFocus is null. When focus changes in non-touch mode (without transition from or to touch mode) either oldFocus or newFocus can be null.

Parameters

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

public boolean onKeyDown (int keyCode, KeyEvent event)

Since: API Level 1

Default implementation of KeyEvent.Callback.onKeyMultiple(): perform press of the view when KEYCODE_DPAD_CENTER or KEYCODE_ENTER is released, if the view is enabled and clickable.

Parameters

keyCode	A key code that represents the button pressed, from `KeyEvent`.
event	The KeyEvent object that defines the button action.

Returns

If you handled the event, return true. If you want to allow the event to be handled by the next receiver, return false.

public boolean onKeyMultiple (int keyCode, int repeatCount, KeyEvent event)

Since: API Level 1

Default implementation of KeyEvent.Callback.onKeyMultiple(): always returns false (doesn't handle the event).

Parameters

keyCode	A key code that represents the button pressed, from `KeyEvent`.
repeatCount	The number of times the action was made.
event	The KeyEvent object that defines the button action.

Returns

If you handled the event, return true. If you want to allow the event to be handled by the next receiver, return false.

public boolean onKeyUp (int keyCode, KeyEvent event)

Since: API Level 1

Default implementation of KeyEvent.Callback.onKeyMultiple(): perform clicking of the view when KEYCODE_DPAD_CENTER or KEYCODE_ENTER is released.

Parameters

keyCode	A key code that represents the button pressed, from `KeyEvent`.
event	The KeyEvent object that defines the button action.

Returns

If you handled the event, return true. If you want to allow the event to be handled by the next receiver, return false.

public boolean onTouchEvent (MotionEvent ev)

Since: API Level 1

Implement this method to handle touch screen motion events.

Parameters

ev	The motion event.

Returns

True if the event was handled, false otherwise.

public boolean onTrackballEvent (MotionEvent ev)

Since: API Level 1

Implement this method to handle trackball motion events. The relative movement of the trackball since the last event can be retrieve with MotionEvent.getX() and MotionEvent.getY(). These are normalized so that a movement of 1 corresponds to the user pressing one DPAD key (so they will often be fractional values, representing the more fine-grained movement information available from a trackball).

Parameters

ev	The motion event.

Returns

True if the event was handled, false otherwise.

public void onWindowFocusChanged (boolean hasWindowFocus)

Since: API Level 1

Called when the window containing this view gains or loses focus. Note that this is separate from view focus: to receive key events, both your view and its window must have focus. If a window is displayed on top of yours that takes input focus, then your own window will lose focus but the view focus will remain unchanged.

Parameters

hasWindowFocus	True if the window containing this view now has focus, false otherwise.

public boolean overlayHorizontalScrollbar ()

Since: API Level 1

Return whether horizontal scrollbar has overlay style

Returns

TRUE if horizontal scrollbar has overlay style.

public boolean overlayVerticalScrollbar ()

Since: API Level 1

Return whether vertical scrollbar has overlay style

Returns

TRUE if vertical scrollbar has overlay style.

public boolean pageDown (boolean bottom)

Since: API Level 1

Scroll the contents of the view down by half the page size

Parameters

bottom	true to jump to bottom of page

Returns

true if the page was scrolled

public boolean pageUp (boolean top)

Since: API Level 1

Scroll the contents of the view up by half the view size

Parameters

top	true to jump to the top of the page

Returns

true if the page was scrolled

public void pauseTimers ()

Since: API Level 1

Pause 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.

public boolean performLongClick ()

Since: API Level 1

Call this view's OnLongClickListener, if it is defined. Invokes the context menu if the OnLongClickListener did not consume the event.

Returns

True if one of the above receivers consumed the event, false otherwise.

public void postUrl (String url, byte[] postData)

Since: API Level 5

Load the url with postData using "POST" method into the WebView. If url is not a network url, it will be loaded with {link loadUrl(String) instead.

Parameters

url	The url of the resource to load.
postData	The data will be passed to "POST" request.

public void refreshPlugins (boolean reloadOpenPages)

Since: API Level 1

This method is deprecated.
This was used for Gears, which has been deprecated.

public void reload ()

Since: API Level 1

Reload the current url.

public boolean requestChildRectangleOnScreen (View child, Rect rect, boolean immediate)

Since: API Level 1

Called when a child of this group wants a particular rectangle to be positioned onto the screen. ViewGroups overriding this can trust that:

child will be a direct child of this group
rectangle will be in the child's coordinates

ViewGroups overriding this should uphold the contract:

nothing will change if the rectangle is already visible
the view port will be scrolled only just enough to make the rectangle visible

Parameters

child	The direct child making the request.
rect	The rectangle in the child's coordinates the child wishes to be on the screen.
immediate	True to forbid animated or delayed scrolling, false otherwise

Returns

Whether the group scrolled to handle the operation

public boolean requestFocus (int direction, Rect previouslyFocusedRect)

Since: API Level 1

Call this to try to give focus to a specific view or to one of its descendants and give it hints about the direction and a specific rectangle that the focus is coming from. The rectangle can help give larger views a finer grained hint about where focus is coming from, and therefore, where to show selection, or forward focus change internally. A view will not actually take focus if it is not focusable (isFocusable() returns false), or if it is focusable and it is not focusable in touch mode (isFocusableInTouchMode()) while the device is in touch mode. A View will not take focus if it is not visible. A View will not take focus if one of its parents has getDescendantFocusability() equal to FOCUS_BLOCK_DESCENDANTS. See also focusSearch(int), which is what you call to say that you have focus, and you want your parent to look for the next one. You may wish to override this method if your custom View has an internal View that it wishes to forward the request to. Looks for a view to give focus to respecting the setting specified by getDescendantFocusability(). Uses onRequestFocusInDescendants(int, android.graphics.Rect) to find focus within the children of this group when appropriate.

Parameters

direction	One of FOCUS_UP, FOCUS_DOWN, FOCUS_LEFT, and FOCUS_RIGHT
previouslyFocusedRect	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.

Returns

Whether this view or one of its descendants actually took focus.

public void requestFocusNodeHref (Message hrefMsg)

Since: API Level 1

Request the href of an anchor element due to getFocusNodePath returning "href." If hrefMsg is null, this method returns immediately and does not dispatch hrefMsg to its target.

Parameters

hrefMsg	This message will be dispatched with the result of the request as the data member with "url" as key. The result can be null.

public void requestImageRef (Message msg)

Since: API Level 1

Request 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	This message will be dispatched with the result of the request as the data member with "url" as key. The result can be null.

public boolean restorePicture (Bundle b, File src)

Since: API Level 3

Restore the display data that was save in savePicture(Bundle, File). Used in conjunction with restoreState(Bundle).

Parameters

b	A Bundle containing the saved display data.
src	The file where the picture data was stored.

Returns

True if the picture was successfully restored.

public WebBackForwardList restoreState (Bundle inState)

Since: API Level 1

Restore the state of this WebView from the given map used in onRestoreInstanceState(Bundle). This method should be called to restore the state of the WebView before using the object. If it is called after the 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. See savePicture(Bundle, File) and restorePicture(Bundle, File) for saving and restoring the display data.

Parameters

inState	The incoming Bundle of state.

Returns

The restored back/forward list or null if restoreState failed.

public void resumeTimers ()

Since: API Level 1

Resume all layout, parsing, and javascript timers for all webviews. This will resume dispatching all timers.

public void savePassword (String host, String username, String password)

Since: API Level 1

Save the username and password for a particular host in the WebView's internal database.

Parameters

host	The host that required the credentials.
username	The username for the given host.
password	The password for the given host.

public boolean savePicture (Bundle b, File dest)

Since: API Level 3

Save the current display data to the Bundle given. Used in conjunction with saveState(Bundle).

Parameters

b	A Bundle to store the display data.
dest	The file to store the serialized picture data. Will be overwritten with this WebView's picture data.

Returns

True if the picture was successfully saved.

public WebBackForwardList saveState (Bundle outState)

Since: API Level 1

Save the state of this WebView used in onSaveInstanceState(Bundle). Please note that this method no longer stores the display data for this WebView. The previous behavior could potentially leak files if restoreState(Bundle) was never called. See savePicture(Bundle, File) and restorePicture(Bundle, File) for saving and restoring the display data.

Parameters

outState	The Bundle to store the WebView state.

Returns

The same copy of the back/forward list used to save the state. If saveState fails, the returned list will be null.

public void setBackgroundColor (int color)

Since: API Level 1

Set the background color. It's white by default. Pass zero to make the view transparent.

Parameters

color	the ARGB color described by Color.java

public void setCertificate (SslCertificate certificate)

Since: API Level 1

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

public void setDownloadListener (DownloadListener listener)

Since: API Level 1

Register 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	An implementation of DownloadListener.

public void setHorizontalScrollbarOverlay (boolean overlay)

Since: API Level 1

Specify whether the horizontal scrollbar has overlay style.

Parameters

overlay	TRUE if horizontal scrollbar should have overlay style.

public void setHttpAuthUsernamePassword (String host, String realm, String username, String password)

Since: API Level 1

Set the HTTP authentication credentials for a given host and realm.

Parameters

host	The host for the credentials.
realm	The realm for the credentials.
username	The username for the password. If it is null, it means password can't be saved.
password	The password

public void setInitialScale (int scaleInPercent)

Since: API Level 1

Set the initial scale for the WebView. 0 means default. If getUseWideViewPort() is true, it zooms out all the way. Otherwise it starts with 100%. If initial scale is greater than 0, WebView starts will this value as initial scale.

Parameters

scaleInPercent	The initial scale in percent.

public void setLayoutParams (ViewGroup.LayoutParams params)

Since: API Level 1

Set the layout parameters associated with this view. These supply parameters to the parent of this view specifying how it should be arranged. There are many subclasses of ViewGroup.LayoutParams, and these correspond to the different subclasses of ViewGroup that are responsible for arranging their children.

Parameters

params	the layout parameters for this view

public void setMapTrackballToArrowKeys (boolean setMap)

Since: API Level 1

public void setNetworkAvailable (boolean networkUp)

Since: API Level 3

Inform 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 indicating if network is available

public void setOverScrollMode (int mode)

Since: API Level 9

Set the over-scroll mode for this view. Valid over-scroll modes are OVER_SCROLL_ALWAYS (default), OVER_SCROLL_IF_CONTENT_SCROLLS (allow over-scrolling only if the view content is larger than the container), or OVER_SCROLL_NEVER. Setting the over-scroll mode of a view will have an effect only if the view is capable of scrolling.

Parameters

mode	The new over-scroll mode for this view.

public void setPictureListener (WebView.PictureListener listener)

Since: API Level 1

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

Parameters

listener	An implementation of WebView.PictureListener.

public void setScrollBarStyle (int style)

Since: API Level 1

Specify the style of the scrollbars. The scrollbars can be overlaid or inset. When inset, they add to the padding of the view. And the scrollbars can be drawn inside the padding area or on the edge of the view. For example, if a view has a background drawable and you want to draw the scrollbars inside the padding specified by the drawable, you can use SCROLLBARS_INSIDE_OVERLAY or SCROLLBARS_INSIDE_INSET. If you want them to appear at the edge of the view, ignoring the padding, then you can use SCROLLBARS_OUTSIDE_OVERLAY or SCROLLBARS_OUTSIDE_INSET.

Parameters

style	the style of the scrollbars. Should be one of SCROLLBARS_INSIDE_OVERLAY, SCROLLBARS_INSIDE_INSET, SCROLLBARS_OUTSIDE_OVERLAY or SCROLLBARS_OUTSIDE_INSET.

public void setVerticalScrollbarOverlay (boolean overlay)

Since: API Level 1

Specify whether the vertical scrollbar has overlay style.

Parameters

overlay	TRUE if vertical scrollbar should have overlay style.

public void setWebChromeClient (WebChromeClient client)

Since: API Level 1

Set 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	An implementation of WebChromeClient.

public void setWebViewClient (WebViewClient client)

Since: API Level 1

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

Parameters

client	An implementation of WebViewClient.

public void stopLoading ()

Since: API Level 1

Stop the current load.

public boolean zoomIn ()

Since: API Level 1

Perform zoom in in the webview

Returns

TRUE if zoom in succeeds. FALSE if no zoom changes.

public boolean zoomOut ()

Since: API Level 1

Perform zoom out in the webview

Returns

TRUE if zoom out succeeds. FALSE if no zoom changes.

Protected Methods

protected int computeHorizontalScrollOffset ()

Since: API Level 1

Compute the horizontal offset of the horizontal scrollbar's thumb within the horizontal range. This value is used to compute the position of the thumb within the scrollbar's track.

The range is expressed in arbitrary units that must be the same as the units used by computeHorizontalScrollRange() and computeHorizontalScrollExtent().

The default offset is the scroll offset of this view.

Returns

the horizontal offset of the scrollbar's thumb

protected int computeHorizontalScrollRange ()

Since: API Level 1

Compute the horizontal range that the horizontal scrollbar represents.

The range is expressed in arbitrary units that must be the same as the units used by computeHorizontalScrollExtent() and computeHorizontalScrollOffset().

The default range is the drawing width of this view.

Returns

the total horizontal range represented by the horizontal scrollbar

protected int computeVerticalScrollExtent ()

Since: API Level 1

Compute the vertical extent of the horizontal scrollbar's thumb within the vertical range. This value is used to compute the length of the thumb within the scrollbar's track.

The range is expressed in arbitrary units that must be the same as the units used by computeVerticalScrollRange() and computeVerticalScrollOffset().

The default extent is the drawing height of this view.

Returns

the vertical extent of the scrollbar's thumb

protected int computeVerticalScrollOffset ()

Since: API Level 1

Compute the vertical offset of the vertical scrollbar's thumb within the horizontal range. This value is used to compute the position of the thumb within the scrollbar's track.

The range is expressed in arbitrary units that must be the same as the units used by computeVerticalScrollRange() and computeVerticalScrollExtent().

The default offset is the scroll offset of this view.

Returns

the vertical offset of the scrollbar's thumb

protected int computeVerticalScrollRange ()

Since: API Level 1

Compute the vertical range that the vertical scrollbar represents.

The range is expressed in arbitrary units that must be the same as the units used by computeVerticalScrollExtent() and computeVerticalScrollOffset().

Returns

the total vertical range represented by the vertical scrollbar
The default range is the drawing height of this view.

protected boolean drawChild (Canvas canvas, View child, long drawingTime)

Since: API Level 1

Draw one child of this View Group. This method is responsible for getting the canvas in the right state. This includes clipping, translating so that the child's scrolled origin is at 0, 0, and applying any animation transformations.

Parameters

canvas	The canvas on which to draw the child
child	Who to draw
drawingTime	The time at which draw is occuring

Returns

True if an invalidate() was issued

protected void finalize ()

Since: API Level 1

Called before the object's memory is reclaimed by the VM. This can only happen once the garbage collector has detected that the object is no longer reachable by any thread of the running application.

The method can be used to free system resources or perform other cleanup before the object is garbage collected. The default implementation of the method is empty, which is also expected by the VM, but subclasses can override finalize() as required. Uncaught exceptions which are thrown during the execution of this method cause it to terminate immediately but are otherwise ignored.

Note that the VM does guarantee that finalize() is called at most once for any object, but it doesn't guarantee when (if at all) finalize() will be called. For example, object B's finalize() can delay the execution of object A's finalize() method and therefore it can delay the reclamation of A's memory. To be safe, use a ReferenceQueue, because it provides more control over the way the VM deals with references during garbage collection.

Throws

Throwable

protected void onAttachedToWindow ()

Since: API Level 1

This is called when the view is attached to a window. At this point it has a Surface and will start drawing. Note that this function is guaranteed to be called before onDraw(Canvas), however it may be called any time before the first onDraw -- including before or after onMeasure(int, int).

protected void onDetachedFromWindow ()

Since: API Level 1

This is called when the view is detached from a window. At this point it no longer has a surface for drawing.

protected void onDraw (Canvas canvas)

Since: API Level 1

Implement this to do your drawing.

Parameters

canvas	the canvas on which the background will be drawn

protected void onFocusChanged (boolean focused, int direction, Rect previouslyFocusedRect)

Since: API Level 1

Called by the view system when the focus state of this view changes. When the focus change event is caused by directional navigation, direction and previouslyFocusedRect provide insight into where the focus is coming from. When overriding, be sure to call up through to the super class so that the standard focus handling will occur.

Parameters

focused	True if the View has focus; false otherwise.
direction	The direction focus has moved when requestFocus() is called to give this view focus. Values are `FOCUS_UP`, `FOCUS_DOWN`, `FOCUS_LEFT` or `FOCUS_RIGHT`. It may not always apply, in which case use the default.
previouslyFocusedRect	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.

protected void onMeasure (int widthMeasureSpec, int heightMeasureSpec)

Since: API Level 1

Measure the view and its content to determine the measured width and the measured height. This method is invoked by measure(int, int) and should be overriden by subclasses to provide accurate and efficient measurement of their contents.

CONTRACT: When overriding this method, you must call setMeasuredDimension(int, int) to store the measured width and height of this view. Failure to do so will trigger an IllegalStateException, thrown by measure(int, int). Calling the superclass' onMeasure(int, int) is a valid use.

The base class implementation of measure defaults to the background size, unless a larger size is allowed by the MeasureSpec. Subclasses should override onMeasure(int, int) to provide better measurements of their content.

If this method is overridden, it is the subclass's responsibility to make sure the measured height and width are at least the view's minimum height and width (getSuggestedMinimumHeight() and getSuggestedMinimumWidth()).

Parameters

widthMeasureSpec	horizontal space requirements as imposed by the parent. The requirements are encoded with `View.MeasureSpec`.
heightMeasureSpec	vertical space requirements as imposed by the parent. The requirements are encoded with `View.MeasureSpec`.

protected void onOverScrolled (int scrollX, int scrollY, boolean clampedX, boolean clampedY)

Since: API Level 9

Called by overScrollBy(int, int, int, int, int, int, int, int, boolean) to respond to the results of an over-scroll operation.

Parameters

scrollX	New X scroll value in pixels
scrollY	New Y scroll value in pixels
clampedX	True if scrollX was clamped to an over-scroll boundary
clampedY	True if scrollY was clamped to an over-scroll boundary

protected void onScrollChanged (int l, int t, int oldl, int oldt)

Since: API Level 1

This is called in response to an internal scroll in this view (i.e., the view scrolled its own contents). This is typically as a result of scrollBy(int, int) or scrollTo(int, int) having been called.

Parameters

l	Current horizontal scroll origin.
t	Current vertical scroll origin.
oldl	Previous horizontal scroll origin.
oldt	Previous vertical scroll origin.

protected void onSizeChanged (int w, int h, int ow, int oh)

Since: API Level 1

This is called during layout when the size of this view has changed. If you were just added to the view hierarchy, you're called with the old values of 0.

Parameters

w	Current width of this view.
h	Current height of this view.
ow	Old width of this view.
oh	Old height of this view.

Interfaces

Classes

Enums

WebView

Class Overview

Basic usage

Cookie and window management

Building web pages to support different screen densities

Summary

Constants

public static final String SCHEME_GEO

public static final String SCHEME_MAILTO

public static final String SCHEME_TEL

Public Constructors

public WebView (Context context)

Parameters

public WebView (Context context, AttributeSet attrs)

Parameters

public WebView (Context context, AttributeSet attrs, int defStyle)

Parameters

Public Methods

public void addJavascriptInterface (Object obj, String interfaceName)

Parameters

public boolean canGoBack ()

Returns

public boolean canGoBackOrForward (int steps)

Parameters

public boolean canGoForward ()

Returns

public Picture capturePicture ()

Returns

public void clearCache (boolean includeDiskFiles)

Parameters

public void clearFormData ()

public void clearHistory ()

public void clearMatches ()

public void clearSslPreferences ()

public void clearView ()

public void computeScroll ()

public WebBackForwardList copyBackForwardList ()

public void debugDump ()

public void destroy ()

public static void disablePlatformNotifications ()

public boolean dispatchKeyEvent (KeyEvent event)

Parameters

Returns

public void documentHasImages (Message response)

Parameters

public void draw (Canvas canvas)

Parameters

public void emulateShiftHeld ()

public static void enablePlatformNotifications ()

public static String findAddress (String addr)

Parameters

Returns

public int findAll (String find)

public void findNext (boolean forward)

public void flingScroll (int vx, int vy)

public void freeMemory ()

public SslCertificate getCertificate ()

Returns

public int getContentHeight ()

Returns

public Bitmap getFavicon ()

Returns

public WebView.HitTestResult getHitTestResult ()

public String[] getHttpAuthUsernamePassword (String host, String realm)

Parameters

Returns

public String getOriginalUrl ()

Returns

public static synchronized PluginList getPluginList ()

Returns

public int getProgress ()

Returns

public float getScale ()

Returns

public WebSettings getSettings ()

Returns

public String getTitle ()