java - Android 如何在点击按钮时首先在日期选择器中显示年份

Question

datepickerLayout.setOnClickListener(new View.OnClickListener() {
    @Override
    public void onClick(View arg0) {
        final Calendar calendar = Calendar.getInstance();
        int yy = calendar.get(Calendar.YEAR);
        int mm = calendar.get(Calendar.MONTH);
        int dd = calendar.get(Calendar.DAY_OF_MONTH);

       DatePickerDialog datePickerDialog = new DatePickerDialog(getContext(),new DatePickerDialog.OnDateSetListener() {
            @Override
            public void onDateSet(DatePicker view, int year, int monthOfYear, int dayOfMonth) {

                datePickerDialog.getTouchables().get(0).performClick();

                String strdate=year+"-"+(monthOfYear+1)+"-"+dayOfMonth;
            }
        }, yy, mm, dd);
        datePickerDialog.getDatePicker().setMinDate(calendar.getTimeInMillis());
        datePickerDialog.show();
    }
});

我想在选择要选择日期的年份后单击按钮时在日期选择器中显示年份。

Answer 1

你可以简单地使用下面的代码实现这一点

 DatePickerDialog dialog = new DatePickerDialog(getActivity(), this, year, month, day);
 dialog.getDatePicker().getTouchables().get( 0 ).performClick();

使用下面的类打开对话框

public class DatePickerFragment extends DialogFragment implements DatePickerDialog.OnDateSetListener {
OnDateOfBirthSelection registrationIIFragment;

@Override
public Dialog onCreateDialog(Bundle savedInstanceState) {
    // Use the current date as the default date in the picker
    final Calendar c = Calendar.getInstance();
    int year = c.get(Calendar.YEAR);
    int month = c.get(Calendar.MONTH);
    int day = c.get(Calendar.DAY_OF_MONTH);

    // Create a new instance of DatePickerDialog and return it
    DatePickerDialog abc = new DatePickerDialog(getActivity(), this, year, month, day);
    //18 Years =568,025,136,000 Milliseconds
    double diff = System.currentTimeMillis() - 568025136000.0;
    abc.getDatePicker().setMaxDate((long) diff);
    abc.getDatePicker().getTouchables().get( 0 ).performClick();
    return abc;
}

public void onDateSet(DatePicker view, int year, int month, int day) {
    // Do something with the date chosen by the user
    //  tv1.setText("Year: "+view.getYear()+" Month: "+view.getMonth()+" Day: "+view.getDayOfMonth());
    registrationIIFragment.onDateOfBirthSelected(view.getDayOfMonth() + " - " + (view.getMonth() + 1) + " - " + view.getYear());
}

public void setCallbackListener(OnDateOfBirthSelection registrationIIFragment) {
    this.registrationIIFragment = registrationIIFragment;
}

public interface OnDateOfBirthSelection {
    public void onDateOfBirthSelected(String s);
}  }

在按钮中单击创建上面的类实例并调用 show 方法。

 DatePickerFragment newFragment = new DatePickerFragment();
            newFragment.setCallbackListener(this);
            newFragment.show(getSupportFragmentManager(), "datePicker");

上面的代码将显示输出如下图

希望对你有帮助谢谢