Flutter中如何自定義一個TimePicker widget

Question

如何從輸入時間選擇器小部件更改紫色選擇顏色、紫色邊框顏色、時間文本顏色以及Hour和Minute顏色，似乎無法在TimePickerThemeData中找到屬性

Answer 1

showTimePicker(
                  context: context,
                  initialTime: TimeOfDay(hour: 10, minute: 47),
                  builder: (context, child) {
                    return Theme(
                      data: ThemeData.light().copyWith(
                        colorScheme: ColorScheme.light(
                          // change the border color
                          primary: Colors.red,
                          // change the text color
                          onSurface: Colors.purple,
                        ),
                        // button colors 
                        buttonTheme: ButtonThemeData(
                          colorScheme: ColorScheme.light(
                            primary: Colors.green,
                          ),
                        ),
                      ),
                      child: child,
                    );
                  },
                );

結果：

Answer 2

您也可以在主題上使用狀態。 在進行某些操作（例如選擇或聚焦操作）時控制 styles。

這里有一個例子：

final theme = ThemeData.light().copyWith(
  timePickerTheme: TimePickerThemeData(
    backgroundColor: Colors.green.shade200,
    hourMinuteColor: MaterialStateColor.resolveWith((states) =>
        states.contains(MaterialState.selected)
            ? Colors.blue.withOpacity(0.2)
            : Colors.orange),
    hourMinuteTextColor: MaterialStateColor.resolveWith((states) =>
        states.contains(MaterialState.selected)
            ? Colors.pink
            : Colors.deepPurple),
    dialHandColor: Colors.pink.shade800,
    dialBackgroundColor: Colors.purple.withOpacity(0.5),
    dialTextColor: MaterialStateColor.resolveWith((states) =>
        states.contains(MaterialState.selected)
            ? Colors.green
            : Colors.black),
    entryModeIconColor: Colors.yellow
    ),
    textTheme: TextTheme(
      overline: TextStyle(
        color: Colors.red,
      ),
    ),
    textButtonTheme: TextButtonThemeData(
        style: ButtonStyle(
      backgroundColor: MaterialStateColor.resolveWith((states) => Colors.black),
      foregroundColor: MaterialStateColor.resolveWith((states) => Colors.green),
      overlayColor: MaterialStateColor.resolveWith((states) => Colors.pink),
    )));