io.flutter.embedding.android.KeyChannelResponder Class Reference

Inheritance diagram for io.flutter.embedding.android.KeyChannelResponder:

Public Member Functions
	KeyChannelResponder (@NonNull KeyEventChannel keyEventChannel)
void	handleEvent ( @NonNull KeyEvent keyEvent, @NonNull OnKeyEventHandledCallback onKeyEventHandledCallback)

Detailed Description

A KeyboardManager.Responder of KeyboardManager that handles events by sending the raw information through the method channel.

This class corresponds to the RawKeyboard API in the framework.

Definition at line 17 of file KeyChannelResponder.java.

Constructor & Destructor Documentation

KeyChannelResponder()

io.flutter.embedding.android.KeyChannelResponder.KeyChannelResponder ( @NonNull KeyEventChannel  keyEventChannel )

inline

Definition at line 26 of file KeyChannelResponder.java.

                                                                       {
    this.keyEventChannel = keyEventChannel;
  }

Member Function Documentation

handleEvent()

void io.flutter.embedding.android.KeyChannelResponder.handleEvent ( @NonNull KeyEvent  keyEvent, @NonNull OnKeyEventHandledCallback  onKeyEventHandledCallback  )

inline

Informs this Responder that a new KeyEvent needs processing.

Parameters

keyEvent	the new KeyEvent this Responder may be interested in.
onKeyEventHandledCallback	the method to call when this Responder has decided whether to handle the KeyEvent.

Implements io.flutter.embedding.android.KeyboardManager.Responder.

Definition at line 31 of file KeyChannelResponder.java.

                                                                                                {
    final int action = keyEvent.getAction();
    if (action != KeyEvent.ACTION_DOWN && action != KeyEvent.ACTION_UP) {
      // There is theoretically a KeyEvent.ACTION_MULTIPLE, but theoretically
      // that isn't sent by Android anymore, so this is just for protection in
      // case the theory is wrong.
      onKeyEventHandledCallback.onKeyEventHandled(false);
      return;
    }
 
    final Character complexCharacter =
        characterCombiner.applyCombiningCharacterToBaseCharacter(keyEvent.getUnicodeChar());
    KeyEventChannel.FlutterKeyEvent flutterEvent =
        new KeyEventChannel.FlutterKeyEvent(keyEvent, complexCharacter);
 
    final boolean isKeyUp = action != KeyEvent.ACTION_DOWN;
    keyEventChannel.sendFlutterKeyEvent(
        flutterEvent,
        isKeyUp,
        (isEventHandled) -> onKeyEventHandledCallback.onKeyEventHandled(isEventHandled));
  }

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The documentation for this class was generated from the following file:

• shell/platform/android/io/flutter/embedding/android/KeyChannelResponder.java