MaterialDatePicker 获取选定的日期

我在 Android 中这样调用 MaterialDatePicker：

MaterialDatePicker.Builder<Pair<Long, Long>> builder = MaterialDatePicker.Builder.dateRangePicker();

CalendarConstraints.Builder constraintsBuilder = new CalendarConstraints.Builder();
builder.setCalendarConstraints(constraintsBuilder.build());

int dialogTheme = resolveOrThrow(getContext(), R.attr.materialCalendarTheme);
builder.setTheme(dialogTheme);

MaterialDatePicker<?> picker = builder.build();

picker.show(getFragmentManager(), picker.toString());

图书馆是：

dependencies {
    implementation 'com.google.android.material:material:1.2.0-alpha01'
}

如何获取此日历的选定日期？我找不到像这样的听众onDateSet or OnDateSetListener

只需使用addOnPositiveButtonClickListener当用户确认有效选择时调用侦听器：

For a 单一日期 picker:

picker.addOnPositiveButtonClickListener(new MaterialPickerOnPositiveButtonClickListener<Long>() {
      @Override public void onPositiveButtonClick(Long selection) {
        // Do something...
        //Calendar calendar = Calendar.getInstance(TimeZone.getTimeZone("UTC"));
        //calendar.setTimeInMillis(selection);   

      }
    });

For a 范围日期选择器:

MaterialDatePicker<Pair<Long, Long>> pickerRange = builderRange.build();
pickerRange.show(....);

pickerRange.addOnPositiveButtonClickListener(new MaterialPickerOnPositiveButtonClickListener<Pair<Long, Long>>() {
  @Override public void onPositiveButtonClick(Pair<Long,Long> selection) {
       Long startDate = selection.first;
       Long endDate = selection.second;
       //Do something...
  }
});