自定义DatePickerDialog

Question

我想为我的日期选择器设置一个自定义布局。

这是我的DialogFragment：

public class MyDatePickerFragment extends DialogFragment
        implements DatePickerDialog.OnDateSetListener {
        DatePickerDialog.OnDateSetListener listener;

    @Override
    public Dialog onCreateDialog(Bundle savedInstanceState) {
        listener = (DatePickerDialog.OnDateSetListener) getActivity();
        Calendar cal = Calendar.getInstance();
        // Return custom dialog...
        DatePickerDialog dialog =  new DatePickerDialog(Objects.requireNonNull(getActivity()), this, cal.get(Calendar.YEAR)-18, cal.get(Calendar.MONTH), cal.get(Calendar.DAY_OF_MONTH)); //

        return dialog;
    }

    @Override
    public void onDateSet(DatePicker view, int year, int month, int day) {
        // Do something with the date chosen by the user
        listener.onDateSet(view, year, month, day);
    }
}

这是我想要设置的自定义布局：

<?xml version="1.0" encoding="utf-8"?>
<DatePicker xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_gravity="center"
    android:datePickerMode="spinner"
    android:calendarViewShown="false"
    android:spinnersShown="true">

</DatePicker>

我不知道怎么设置它。你怎么做到的？

Answer 1

我解决这个问题的方法是改用OnCreateView，在布局中引用我的选择器和按钮，并在将我的活动分配为实现之后调用onDateSet的侦听器方法。下面是它看起来的样子：

public class AwesomeDatePickerFragment extends DialogFragment {
        DatePickerDialog.OnDateSetListener listener;

    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container,
                             Bundle savedInstanceState) {

        View view = inflater.inflate(R.layout.dialog_date_picker, container);
        listener = (DatePickerDialog.OnDateSetListener) getActivity();
        Button btn = view.findViewById(R.id.picker_button);
        final DatePicker picker = view.findViewById(R.id.awesome_date_picker);
        btn.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                listener.onDateSet(picker, picker.getYear(), picker.getMonth(), picker.getDayOfMonth());
                dismiss();
            }
        });
        return view;
    }
}