KeyboardAccessibilityService.java

/*
   Physical Keyboard Accessibility Service
 
   Copyright 2026 Ibrahim Sevinc <ibrahim.sevinc.mail@gmail.com>
 
   This Source Code Form is subject to the terms of the Mozilla Public License, v. 2.0.
   If a copy of the MPL was not distributed with this file, You can obtain one at
   http://mozilla.org/MPL/2.0/.
 */
 
package com.freerdp.freerdpcore.presentation;
 
import android.accessibilityservice.AccessibilityService;
import android.accessibilityservice.AccessibilityServiceInfo;
import android.view.InputDevice;
import android.view.KeyEvent;
import android.view.accessibility.AccessibilityEvent;
 
public class KeyboardAccessibilityService extends AccessibilityService
{
  @Override public boolean onKeyEvent(KeyEvent event)
  {
    SessionActivity session = SessionActivity.activeSession;
    if (session == null)
      return super.onKeyEvent(event);
 
    InputDevice device = event.getDevice();
    if (device != null &&
        (device.getSources() & InputDevice.SOURCE_GAMEPAD) == InputDevice.SOURCE_GAMEPAD)
      return super.onKeyEvent(event);
 
    switch (event.getKeyCode())
    {
      case KeyEvent.KEYCODE_VOLUME_UP:
      case KeyEvent.KEYCODE_VOLUME_DOWN:
      case KeyEvent.KEYCODE_POWER:
        return super.onKeyEvent(event);
    }
 
    /* Some tablets map the physical ESC key to KEYCODE_BACK (scancode 1).*/
    if (event.getScanCode() == 1 && event.getKeyCode() != KeyEvent.KEYCODE_ESCAPE)
    {
      event =
          new KeyEvent(event.getDownTime(), event.getEventTime(), event.getAction(),
                       KeyEvent.KEYCODE_ESCAPE, event.getRepeatCount(), event.getMetaState());
    }
 
    return session.handleKeyEvent(event);
  }
 
  @Override public void onServiceConnected()
  {
    AccessibilityServiceInfo info = new AccessibilityServiceInfo();
    info.packageNames = new String[] { getApplicationContext().getPackageName() };
    info.eventTypes = AccessibilityEvent.TYPES_ALL_MASK;
    info.notificationTimeout = 100;
    info.flags = AccessibilityServiceInfo.FLAG_REQUEST_FILTER_KEY_EVENTS;
    info.feedbackType = AccessibilityServiceInfo.FEEDBACK_GENERIC;
    setServiceInfo(info);
  }
 
  @Override public void onAccessibilityEvent(AccessibilityEvent event)
  {
  }
 
  @Override public void onInterrupt()
  {
  }
}