Flutter can't read from Clipboard

Question

I come asking for quite a specific question regarding Flutter and the Future and await mechanism, which seems to be working, but my Clipboard does not really function while

Answer 1

It's works for me:

  _getFromClipboard() async {
    Map<String, dynamic> result =
        await SystemChannels.platform.invokeMethod('Clipboard.getData');
    if (result != null) {
      return result['text'].toString();
    }
    return '';
  }

Answer 2

First create a method

Future<String> getClipBoardData() async {
        ClipboardData data = await Clipboard.getData(Clipboard.kTextPlain);
        return data.text;
      }

Then in build method

FutureBuilder(
                future: getClipBoardData(),
                initialData: 'nothing',
                builder: (context, snapShot){
                  return Text(snapShot.data.toString());
                },
              ),

Answer 3

You can simply re-use Flutter's existing library code to getData from Clipboard.

ClipboardData data = await Clipboard.getData('text/plain');

Answer 4

Also can be useful if you want to listen for periodic updates from the system clipboard. Originally I replied here, just re-posting the solution:

#creating a listening Stream:
final clipboardContentStream = StreamController<String>.broadcast();

#creating a timer for updates:
Timer clipboardTriggerTime;

clipboardTriggerTime = Timer.periodic(
# you can specify any duration you want, roughly every 20 read from the system
      const Duration(seconds: 5),
      (timer) {
        Clipboard.getData('text/plain').then((clipboarContent) {
          print('Clipboard content ${clipboarContent.text}');

          # post to a Stream you're subscribed to
          clipboardContentStream.add(clipboarContent.text);
        });
      },
    );

# subscribe your view with
Stream get clipboardText => clipboardController.stream

# and don't forget to clean up on your widget
@override
void dispose() {
  clipboardContentStream.close();

  clipboardTriggerTime.cancel();
}