onPlatformMessage property Null safety
Called whenever this window receives a message from a platform-specific plugin.
Accessing this value returns the value contained in the
PlatformDispatcher singleton, so instead of getting it from here, you
should consider getting it from WidgetsBinding.instance.platformDispatcher instead
(or, when WidgetsBinding isn't available, from
PlatformDispatcher.instance). The reason this value forwards to the
PlatformDispatcher is to provide convenience for applications that only
use a single main window.
The name parameter determines which plugin sent the message. The data
parameter is the payload and is typically UTF-8 encoded JSON but can be
arbitrary data.
Message handlers must call the function given in the callback parameter.
If the handler does not need to respond, the handler should pass null to
the callback.
The framework invokes this callback in the same zone in which the callback was set.
Implementation
@Deprecated(
'Instead of calling this callback, use ServicesBinding.instance.channelBuffers.push. '
'This feature was deprecated after v2.1.0-10.0.pre.'
)
@override
ui.PlatformMessageCallback? get onPlatformMessage => platformDispatcher.onPlatformMessage;Implementation
@Deprecated(
'Instead of setting this callback, use ServicesBinding.instance.defaultBinaryMessenger.setMessageHandler. '
'This feature was deprecated after v2.1.0-10.0.pre.'
)
@override
set onPlatformMessage(ui.PlatformMessageCallback? callback) {
platformDispatcher.onPlatformMessage = callback;
}