android - MaterialDatePicker获取所选日期

Question

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());

该库是:

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

如何获得该日历的选定日期？我找不到像onDateSet或OnDateSetListener的任何侦听器

Answer 1

当用户确认有效选择时，只需使用 addOnPositiveButtonClickListener 侦听器即可调用:
对于单日期选择器:

picker.addOnPositiveButtonClickListener(new MaterialPickerOnPositiveButtonClickListener<Long>() {
      @Override public void onPositiveButtonClick(Long selection) {
        // Do something...
      }
    });

对于范围日期选择器:

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...
  }
});