Package io.flutter.embedding.engine.systemchannels

Class KeyEventChannel

java.lang.Object

io.flutter.embedding.engine.systemchannels.KeyEventChannel

public class KeyEventChannel
extends Object

Event message channel for key events to/from the Flutter framework.

Sends key up/down events to the framework, and receives asynchronous messages from the framework about whether or not the key was handled.

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static interface	KeyEventChannel.EventResponseHandler	A handler of incoming key handling messages.
static class	KeyEventChannel.FlutterKeyEvent	A key event as defined by Flutter.

Field Summary

Fields

Modifier and Type	Field	Description
final BasicMessageChannel<Object>	channel

Constructor Summary

Constructors

Constructor	Description
KeyEventChannel(BinaryMessenger binaryMessenger)	A constructor that creates a KeyEventChannel with the default message handler.

Method Summary

Modifier and Type	Method	Description
void	sendFlutterKeyEvent(KeyEventChannel.FlutterKeyEvent keyEvent, boolean isKeyUp, KeyEventChannel.EventResponseHandler responseHandler)

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Details

channel

@NonNull
public final BasicMessageChannel<Object> channel

Constructor Details

KeyEventChannel

public KeyEventChannel(@NonNull
 BinaryMessenger binaryMessenger)

A constructor that creates a KeyEventChannel with the default message handler.

Parameters:

binaryMessenger - the binary messenger used to send messages on this channel.

Method Details

sendFlutterKeyEvent

public void sendFlutterKeyEvent(@NonNull
 KeyEventChannel.FlutterKeyEvent keyEvent,
 boolean isKeyUp,
 @NonNull
 KeyEventChannel.EventResponseHandler responseHandler)