AndroidView class Null safety

Embeds an Android view in the Widget hierarchy.

Requires Android API level 23 or greater.

Embedding Android views is an expensive operation and should be avoided when a Flutter equivalent is possible.

The embedded Android view is painted just like any other Flutter widget and transformations apply to it as well.

The widget fills all available space, the parent of this object must provide bounded layout constraints.

The widget participates in Flutter's gesture arenas, and dispatches touch events to the platform view iff it won the arena. Specific gestures that should be dispatched to the platform view can be specified in the gestureRecognizers constructor parameter. If the set of gesture recognizers is empty, a gesture will be dispatched to the platform view iff it was not claimed by any other gesture recognizer.

The Android view object is created using a PlatformViewFactory. Plugins can register platform view factories with PlatformViewRegistry#registerViewFactory.

Registration is typically done in the plugin's registerWith method, e.g:

  public static void registerWith(Registrar registrar) {
    registrar.platformViewRegistry().registerViewFactory("webview", WebViewFactory(registrar.messenger()));
  }

The platform view's lifetime is the same as the lifetime of the State object for this widget. When the State is disposed the platform view (and auxiliary resources) are lazily released (some resources are immediately released and some by platform garbage collector). A stateful widget's state is disposed when the widget is removed from the tree or when it is moved within the tree. If the stateful widget has a key and it's only moved relative to its siblings, or it has a GlobalKey and it's moved within the tree, it will not be disposed.

Inheritance

Constructors

AndroidView({Key? key, required String viewType, PlatformViewCreatedCallback? onPlatformViewCreated, PlatformViewHitTestBehavior hitTestBehavior = PlatformViewHitTestBehavior.opaque, TextDirection? layoutDirection, Set<Factory<OneSequenceGestureRecognizer>>? gestureRecognizers, dynamic creationParams, MessageCodec? creationParamsCodec, Clip clipBehavior = Clip.hardEdge})
Creates a widget that embeds an Android view.
const

Properties

clipBehavior → Clip
The content will be clipped (or not) according to this option.
final
creationParams → dynamic
Passed as the args argument of PlatformViewFactory#create
final
creationParamsCodec → MessageCodec?
The codec used to encode creationParams before sending it to the platform side. It should match the codec passed to the constructor of PlatformViewFactory.
final
gestureRecognizers → Set<Factory<OneSequenceGestureRecognizer>>?
Which gestures should be forwarded to the Android view.
final
hashCode → int
The hash code for this object.
nonVirtual">@nonVirtualread-onlyinherited
hitTestBehavior → PlatformViewHitTestBehavior
How this widget should behave during hit testing.
final
key → Key?
Controls how one widget replaces another widget in the tree.
finalinherited
layoutDirection → TextDirection?
The text direction to use for the embedded view.
final
onPlatformViewCreated → PlatformViewCreatedCallback?
Callback to invoke after the platform view has been created.
final
runtimeType → Type
A representation of the runtime type of the object.
read-onlyinherited
viewType → String
The unique identifier for Android view type to be embedded by this widget.
final

Methods

createElement() → StatefulElement
Creates a StatefulElement to manage this widget's location in the tree.
inherited
createState() → State<AndroidView>
Creates the mutable state for this widget at a given location in the tree.
override
debugDescribeChildren() → List<DiagnosticsNode>
Returns a list of DiagnosticsNode objects describing this node's children.
protected">@protectedinherited
debugFillProperties(DiagnosticPropertiesBuilder properties) → void
Add additional properties associated with the node.
inherited
noSuchMethod(Invocation invocation) → dynamic
Invoked when a non-existent method or property is accessed.
inherited
toDiagnosticsNode({String? name, DiagnosticsTreeStyle? style}) → DiagnosticsNode
Returns a debug representation of the object that is used by debugging tools and by DiagnosticsNode.toStringDeep.
inherited
toString({DiagnosticLevel minLevel = DiagnosticLevel.info}) → String
A string representation of this object.
inherited
toStringDeep({String prefixLineOne = '', String? prefixOtherLines, DiagnosticLevel minLevel = DiagnosticLevel.debug}) → String
Returns a string representation of this node and its descendants.
inherited
toStringShallow({String joiner = ', ', DiagnosticLevel minLevel = DiagnosticLevel.debug}) → String
Returns a one-line detailed description of the object.
inherited
toStringShort() → String
A short, textual description of this widget.
inherited

Operators

operator ==(Object other) → bool
The equality operator.
nonVirtual">@nonVirtualinherited