示例#1
0
  /**
   * Converts the {@link KeyEvent} into low-level events and sends them to the host as either
   * key-events or text-events. This contains some logic for handling some special keys, and avoids
   * sending a key-up event for a key that was previously injected as a text-event.
   */
  public boolean sendKeyEvent(KeyEvent event) {
    int keyCode = event.getKeyCode();
    boolean pressed = event.getAction() == KeyEvent.ACTION_DOWN;

    // Events received from software keyboards generate TextEvent in two
    // cases:
    //   1. This is an ACTION_MULTIPLE event.
    //   2. Ctrl, Alt and Meta are not pressed.
    // This ensures that on-screen keyboard always injects input that
    // correspond to what user sees on the screen, while physical keyboard
    // acts as if it is connected to the remote host.
    if (event.getAction() == KeyEvent.ACTION_MULTIPLE) {
      mInjector.sendTextEvent(event.getCharacters());
      return true;
    }

    // For Enter getUnicodeChar() returns 10 (line feed), but we still
    // want to send it as KeyEvent.
    int unicode = keyCode != KeyEvent.KEYCODE_ENTER ? event.getUnicodeChar() : 0;

    boolean no_modifiers =
        !event.isAltPressed() && !event.isCtrlPressed() && !event.isMetaPressed();

    if (pressed && unicode != 0 && no_modifiers) {
      mPressedTextKeys.add(keyCode);
      int[] codePoints = {unicode};
      mInjector.sendTextEvent(new String(codePoints, 0, 1));
      return true;
    }

    if (!pressed && mPressedTextKeys.contains(keyCode)) {
      mPressedTextKeys.remove(keyCode);
      return true;
    }

    switch (keyCode) {
        // KEYCODE_AT, KEYCODE_POUND, KEYCODE_STAR and KEYCODE_PLUS are
        // deprecated, but they still need to be here for older devices and
        // third-party keyboards that may still generate these events. See
        // https://source.android.com/devices/input/keyboard-devices.html#legacy-unsupported-keys
      case KeyEvent.KEYCODE_AT:
        mInjector.sendKeyEvent(0, KeyEvent.KEYCODE_SHIFT_LEFT, pressed);
        mInjector.sendKeyEvent(0, KeyEvent.KEYCODE_2, pressed);
        return true;

      case KeyEvent.KEYCODE_POUND:
        mInjector.sendKeyEvent(0, KeyEvent.KEYCODE_SHIFT_LEFT, pressed);
        mInjector.sendKeyEvent(0, KeyEvent.KEYCODE_3, pressed);
        return true;

      case KeyEvent.KEYCODE_STAR:
        mInjector.sendKeyEvent(0, KeyEvent.KEYCODE_SHIFT_LEFT, pressed);
        mInjector.sendKeyEvent(0, KeyEvent.KEYCODE_8, pressed);
        return true;

      case KeyEvent.KEYCODE_PLUS:
        mInjector.sendKeyEvent(0, KeyEvent.KEYCODE_SHIFT_LEFT, pressed);
        mInjector.sendKeyEvent(0, KeyEvent.KEYCODE_EQUALS, pressed);
        return true;

      default:
        // We try to send all other key codes to the host directly.
        return mInjector.sendKeyEvent(0, keyCode, pressed);
    }
  }
示例#2
0
  /**
   * Called once when a keyboard key is pressed, then again when that same key is released. This is
   * not guaranteed to be notified of all soft keyboard events: certian keyboards might not call it
   * at all, while others might skip it in certain situations (e.g. swipe input).
   */
  @Override
  public boolean dispatchKeyEvent(KeyEvent event) {
    int keyCode = event.getKeyCode();

    // Dispatch the back button to the system to handle navigation
    if (keyCode == KeyEvent.KEYCODE_BACK) {
      JniInterface.disconnectFromHost();
      return super.dispatchKeyEvent(event);
    }

    boolean pressed = event.getAction() == KeyEvent.ACTION_DOWN;

    // Physical keyboard must work as if it is connected to the remote host
    // and so events coming from physical keyboard never generate text
    // events. Also scan codes must be used instead of key code, so that
    // the keyboard layout selected on the client doesn't affect the key
    // codes sent to the host.
    if (event.getDeviceId() != KeyCharacterMap.VIRTUAL_KEYBOARD) {
      return JniInterface.sendKeyEvent(event.getScanCode(), 0, pressed);
    }

    // Events received from software keyboards generate TextEvent in two
    // cases:
    //   1. This is an ACTION_MULTIPLE event.
    //   2. Ctrl, Alt and Meta are not pressed.
    // This ensures that on-screen keyboard always injects input that
    // correspond to what user sees on the screen, while physical keyboard
    // acts as if it is connected to the remote host.
    if (event.getAction() == KeyEvent.ACTION_MULTIPLE) {
      JniInterface.sendTextEvent(event.getCharacters());
      return true;
    }

    // For Enter getUnicodeChar() returns 10 (line feed), but we still
    // want to send it as KeyEvent.
    int unicode = keyCode != KeyEvent.KEYCODE_ENTER ? event.getUnicodeChar() : 0;

    boolean no_modifiers =
        !event.isAltPressed() && !event.isCtrlPressed() && !event.isMetaPressed();

    if (pressed && unicode != 0 && no_modifiers) {
      mPressedTextKeys.add(keyCode);
      int[] codePoints = {unicode};
      JniInterface.sendTextEvent(new String(codePoints, 0, 1));
      return true;
    }

    if (!pressed && mPressedTextKeys.contains(keyCode)) {
      mPressedTextKeys.remove(keyCode);
      return true;
    }

    switch (keyCode) {
        // KEYCODE_AT, KEYCODE_POUND, KEYCODE_STAR and KEYCODE_PLUS are
        // deprecated, but they still need to be here for older devices and
        // third-party keyboards that may still generate these events. See
        // https://source.android.com/devices/input/keyboard-devices.html#legacy-unsupported-keys
      case KeyEvent.KEYCODE_AT:
        JniInterface.sendKeyEvent(0, KeyEvent.KEYCODE_SHIFT_LEFT, pressed);
        JniInterface.sendKeyEvent(0, KeyEvent.KEYCODE_2, pressed);
        return true;

      case KeyEvent.KEYCODE_POUND:
        JniInterface.sendKeyEvent(0, KeyEvent.KEYCODE_SHIFT_LEFT, pressed);
        JniInterface.sendKeyEvent(0, KeyEvent.KEYCODE_3, pressed);
        return true;

      case KeyEvent.KEYCODE_STAR:
        JniInterface.sendKeyEvent(0, KeyEvent.KEYCODE_SHIFT_LEFT, pressed);
        JniInterface.sendKeyEvent(0, KeyEvent.KEYCODE_8, pressed);
        return true;

      case KeyEvent.KEYCODE_PLUS:
        JniInterface.sendKeyEvent(0, KeyEvent.KEYCODE_SHIFT_LEFT, pressed);
        JniInterface.sendKeyEvent(0, KeyEvent.KEYCODE_EQUALS, pressed);
        return true;

      default:
        // We try to send all other key codes to the host directly.
        return JniInterface.sendKeyEvent(0, keyCode, pressed);
    }
  }