RawKeyboard可能是你正在寻找的。示例：

RawKeyboard.instance.keysPressed.contains(LogicalKeyboardKey.controlLeft)

请注意，在检查控制键等时，您需要检查所有可能的键变体。

final shiftKeys = [LogicalKeyboardKey.shiftLeft, LogicalKeyboardKey.shiftRight];
final isShiftPressed = RawKeyboard.instance.keysPressed
    .where((it) => shiftKeys.contains(it))
    .isNotEmpty;

我使用这个方法来检测是否按下了ctrl + v或cmd + v，以从剪贴板中获取图像

1

// declare focusNode first
final _fokusTitle = FocusNode();

...

二

Padding(
            padding: const EdgeInsets.all(60),
            // listen key press widget
            child: RawKeyboardListener(
              // add focus node here
              focusNode: _fokusTitle,
              child: Text("halo apa kabar , saya disini"),
              onKey: (x) async {
                // detect if ctrl + v or cmd + v is pressed
                if (x.isControlPressed && x.character == "v" || x.isMetaPressed && x.character == "v") {
                  // you need add some package "pasteboard" , 
                  // if you wan to get image from clipboard, or just replace with some handle
                  final imageBytes = await Pasteboard.image;
                  print(imageBytes?.length);
                }
              },
            ),
          )

...

三

Padding(
                                  padding: const EdgeInsets.all(8.0),
                                  // keyboard listener will catch some key pressed here , if you focused cursor here
                                  child: TextFormField(
                                    focusNode: _fokusTitle,
                                    controller: _controllerTitle,
                                    maxLength: 50,
                                    maxLines: 1,
                                    decoration: InputDecoration(hintText: "mulai ketik sesuatu", labelText: "judul"),
                                  ),
                                ),