flutter TimePickerDialog get selected Time

otto
June 20, 2023
244 views
0 votes
2 Answers

how can I get the selected time of TimePickerDialog in Flutter?
I dont want to use showDialog because I want to add some other buttons below the TimePickerDialog. When it is not possible to use the TimePickerDialog then what would be the way to do it? Use the sourcecode of Timepickerdialog in my local workspace and update it there?
I am using it like this:

showDialog(
  context: context,
  builder: (BuildContext context) {
    return AlertDialog(
      actions: <Widget>[
        SizedBox(
          child: TimePickerDialog(
            initialTime: TimeOfDay.fromDateTime(DateTime.now()),
            cancelText: "",
            confirmText: "", 
          ),
        ),
        TextButton(
          child: Text('Cancel'),
          onPressed: () {
            Navigator.of(context).pop();
          },
        ),
        TextButton(
          child: Text('OK'),
          onPressed: () {
            // Perform an action
            Navigator.of(context).pop();
          },
        ),
      ],
    );
  },
);

Answers

According to the official docs here, the value returned by showDialog is the selected TimeOfDay if the user taps the "OK" button, or null if the user taps the "CANCEL" button.

So you need to call the showDialog with the await keyword.

final selectedTime = await showDialog(
  context: context,
  builder: (BuildContext context) {
    return AlertDialog(
      actions: <Widget>[
        SizedBox(
          child: TimePickerDialog(
            initialTime: TimeOfDay.fromDateTime(DateTime.now()),
            cancelText: "",
            confirmText: "", 
          ),
        ),
        TextButton(
          child: Text('Cancel'),
          onPressed: () {
            Navigator.of(context).pop();
          },
        ),
        TextButton(
          child: Text('OK'),
          onPressed: () {
            // Perform an action
            Navigator.of(context).pop();
          },
        ),
      ],
    );
  },
);

The solution to the question is straightforward, we just have to wrap the dialog with WillPopScope Widget which can be used to handle barrier dismiss or when navigator back button is pressed. In this method, we call the same setter function which is called when Confirm Button is pressed of time_picker.

Open timer_picker.dart file by hovering over the TimePickerDialog widget and hold CTRL and left-click on it, this will open timer_picker. In this file scroll to line no 2415. Then wrap the Dialog Widget with WillPopScope or just copy paste the code which I have added below.

Complete Code :

UI Code : –

import 'package:flutter/material.dart';

void main() {
  runApp(const MyApp());
}

class MyApp extends StatelessWidget {
  const MyApp({super.key});

  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      title: 'Flutter Demo',
      theme: ThemeData(
        primarySwatch: Colors.blue,
      ),
      home: const Box(),
    );
  }
}

class Box extends StatefulWidget {
  const Box({super.key});

  @override
  State<Box> createState() => _BoxState();
}

class _BoxState extends State<Box> {
  var timeVal = TimeOfDay.fromDateTime(DateTime.now());
  @override
  Widget build(BuildContext context) {
    return Scaffold(
        body: Center(
            child: GestureDetector(
      onTap: () async {
        timeVal = await showDialog(
          context: context,
          builder: (BuildContext context) {
            return AlertDialog(
              actions: <Widget>[
                SizedBox(
                  height: 500,
                  width: 500,
                  child: TimePickerDialog(
                    initialTime: timeVal,
                    cancelText: "",
                    confirmText: "",
                  ),
                ),
              ],
            );
          },
        );
        setState(() {});
      },
      child: Text(
        "Time : - ${timeVal.format(context)}",
        style: const TextStyle(fontSize: 25),
      ),
    )));
  }
}

time_picker.dart Code : –

return WillPopScope(
onWillPop: () {
  _handleOk();
  return Future.value(false);
},
child: Dialog(
  shape: shape,
  elevation: pickerTheme.elevation ?? defaultTheme.elevation,
  backgroundColor:
      pickerTheme.backgroundColor ?? defaultTheme.backgroundColor,
  insetPadding: EdgeInsets.symmetric(
    horizontal: 16,
    vertical: (_entryMode.value == TimePickerEntryMode.input ||
            _entryMode.value == TimePickerEntryMode.inputOnly)
        ? 0
        : 24,
  ),
  child: Padding(
    padding: pickerTheme.padding ?? defaultTheme.padding,
    child: LayoutBuilder(
        builder: (BuildContext context, BoxConstraints constraints) {
      final Size constrainedSize = constraints.constrain(dialogSize);
      final Size allowedSize = Size(
        constrainedSize.width < minDialogSize.width
            ? minDialogSize.width
            : constrainedSize.width,
        constrainedSize.height < minDialogSize.height
            ? minDialogSize.height
            : constrainedSize.height,
      );
      return SingleChildScrollView(
        restorationId: 'time_picker_scroll_view_horizontal',
        scrollDirection: Axis.horizontal,
        child: SingleChildScrollView(
          restorationId: 'time_picker_scroll_view_vertical',
          child: AnimatedContainer(
            width: allowedSize.width,
            height: allowedSize.height,
            duration: _kDialogSizeAnimationDuration,
            curve: Curves.easeIn,
            child: Column(
              crossAxisAlignment: CrossAxisAlignment.start,
              children: <Widget>[
                Expanded(
                  child: Form(
                    key: _formKey,
                    autovalidateMode: _autovalidateMode.value,
                    child: _TimePicker(
                      time: widget.initialTime,
                      onTimeChanged: _handleTimeChanged,
                      helpText: widget.helpText,
                      cancelText: widget.cancelText,
                      confirmText: widget.confirmText,
                      errorInvalidText: widget.errorInvalidText,
                      hourLabelText: widget.hourLabelText,
                      minuteLabelText: widget.minuteLabelText,
                      restorationId: 'time_picker',
                      entryMode: _entryMode.value,
                      orientation: widget.orientation,
                      onEntryModeChanged: _handleEntryModeChanged,
                    ),
                  ),
                ),
                actions,
              ],
            ),
          ),
        ),
      );
    }),
  ),
));

Output : –

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flutter TimePickerDialog get selected Time –

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