ServicesBinding mixin

Listens for platform messages and directs them to the defaultBinaryMessenger.

The ServicesBinding also registers a LicenseEntryCollector that exposes the licenses found in the LICENSE file stored at the root of the asset bundle, and implements the ext.flutter.evict service extension (see evict).

Superclass Constraints
Implemented by

Constructors

ServicesBinding()

Properties

defaultBinaryMessenger BinaryMessenger
The default instance of BinaryMessenger. [...]
read-only
hashCode int
The hash code for this object. [...]
read-only, inherited
locked bool
Whether lockEvents is currently locking events. [...]
@protected, read-only, inherited
runtimeType Type
A representation of the runtime type of the object.
read-only, inherited
window Window
The window to which this binding is bound. [...]
read-only, inherited

Methods

createBinaryMessenger() BinaryMessenger
Creates a default BinaryMessenger instance that can be used for sending platform messages.
@protected
evict(String asset) → void
Called in response to the ext.flutter.evict service extension. [...]
@mustCallSuper, @protected
handleSystemMessage(Object systemMessage) Future<void>
Handler called for messages received on the SystemChannels.system message channel. [...]
@mustCallSuper, @protected
initInstances() → void
The initialization method. Subclasses override this method to hook into the platform and otherwise configure their services. Subclasses must call "super.initInstances()". [...]
override
initLicenses() → void
Adds relevant licenses to the LicenseRegistry. [...]
@mustCallSuper, @protected
initServiceExtensions() → void
Called when the binding is initialized, to register service extensions. [...]
override
lockEvents(Future<void> callback()) Future<void>
Locks the dispatching of asynchronous events and callbacks until the callback's future completes. [...]
@protected, inherited
noSuchMethod(Invocation invocation) → dynamic
Invoked when a non-existent method or property is accessed. [...]
inherited
performReassemble() Future<void>
This method is called by reassembleApplication to actually cause the application to reassemble, e.g. after a hot reload. [...]
@mustCallSuper, @protected, inherited
postEvent(String eventKind, Map<String, dynamic> eventData) → void
All events dispatched by a BindingBase use this method instead of calling developer.postEvent directly so that tests for BindingBase can track which events were dispatched by overriding this method.
@protected, inherited
reassembleApplication() Future<void>
Cause the entire application to redraw, e.g. after a hot reload. [...]
inherited
registerBoolServiceExtension({String name, AsyncValueGetter<bool> getter, AsyncValueSetter<bool> setter }) → void
Registers a service extension method with the given name (full name "ext.flutter.name"), which takes a single argument "enabled" which can have the value "true" or the value "false" or can be omitted to read the current value. (Any value other than "true" is considered equivalent to "false". Other arguments are ignored.) [...]
@protected, inherited
registerNumericServiceExtension({String name, AsyncValueGetter<double> getter, AsyncValueSetter<double> setter }) → void
Registers a service extension method with the given name (full name "ext.flutter.name"), which takes a single argument with the same name as the method which, if present, must have a value that can be parsed by double.parse, and can be omitted to read the current value. (Other arguments are ignored.) [...]
@protected, inherited
registerServiceExtension({String name, ServiceExtensionCallback callback }) → void
Registers a service extension method with the given name (full name "ext.flutter.name"). [...]
@protected, inherited
registerSignalServiceExtension({String name, AsyncCallback callback }) → void
Registers a service extension method with the given name (full name "ext.flutter.name"), which takes no arguments and returns no value. [...]
@protected, inherited
registerStringServiceExtension({String name, AsyncValueGetter<String> getter, AsyncValueSetter<String> setter }) → void
Registers a service extension method with the given name (full name "ext.flutter.name"), which optionally takes a single argument with the name "value". If the argument is omitted, the value is to be read, otherwise it is to be set. Returns the current value. [...]
@protected, inherited
toString() String
Returns a string representation of this object.
inherited
unlocked() → void
Called by lockEvents when events get unlocked. [...]
@mustCallSuper, @protected, inherited

Operators

operator ==(dynamic other) bool
The equality operator. [...]
inherited

Static Properties

instance ServicesBinding
The current ServicesBinding, if one has been created.
read-only