如何在单击按钮时显示 DatePickerDialog？

Question

我正在开发一款应用，要求用户 select 约会 (dd/mm/yyyy)。我想在单击按钮时显示一个带有 DatePicker 的对话框。一旦日期被 select 编辑，它必须显示在 EditText 中。

我正在使用 Android Studio 2.2，最小 sdk 的项目是 23。

请帮助我完成所需的代码。

Answer 1

    final Calendar newCalendar = Calendar.getInstance();
    final DatePickerDialog  StartTime = new DatePickerDialog(this, new DatePickerDialog.OnDateSetListener() {
                public void onDateSet(DatePicker view, int year, int monthOfYear, int dayOfMonth) {
                    Calendar newDate = Calendar.getInstance();
                    newDate.set(year, monthOfYear, dayOfMonth);
                    activitydate.setText(dateFormatter.format(newDate.getTime()));
                }
    
            }, newCalendar.get(Calendar.YEAR), newCalendar.get(Calendar.MONTH), newCalendar.get(Calendar.DAY_OF_MONTH));
    
      btn_checkin.setOnClickListener(new View.OnClickListener() {
@Override   public void onClick(View v) {
         StartTime.show():    
     });

Answer 2

对我有用。如果你想为选择启用未来时间，你必须删除最大日期。您需要做如下操作。

 btnDate.setOnClickListener(new View.OnClickListener() {
                       @Override
                       public void onClick(View v) {
                              DialogFragment newFragment = new DatePickerFragment();
                                    newFragment.show(getSupportFragmentManager(), "datePicker");
                            }
                        });

            public static class DatePickerFragment extends DialogFragment
                        implements DatePickerDialog.OnDateSetListener {

                    @Override
                    public Dialog onCreateDialog(Bundle savedInstanceState) {
                        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);
                        DatePickerDialog dialog = new DatePickerDialog(getActivity(), this, year, month, day);
                        dialog.getDatePicker().setMaxDate(c.getTimeInMillis());
                        return  dialog;
                    }

                    public void onDateSet(DatePicker view, int year, int month, int day) {
                       btnDate.setText(ConverterDate.ConvertDate(year, month + 1, day));
                    }
                }

Answer 3

我。在你的 build.gradle 添加最新的 appcompat 库，当时是 24.2.1

dependencies {  
    compile 'com.android.support:appcompat-v7:X.X.X' 
    // where X.X.X version
}

二．让你的 activity 扩展 android.support.v7.app.AppCompatActivity 并实现 DatePickerDialog.OnDateSetListener 接口。

public class MainActivity extends AppCompatActivity  
    implements DatePickerDialog.OnDateSetListener {

三。创建您的 DatePickerDialog 设置上下文、侦听器的实现以及日期选择器的开始年月日。

DatePickerDialog datePickerDialog = new DatePickerDialog(  
    context, MainActivity.this, startYear, starthMonth, startDay);

四．在按钮的点击事件侦听器上显示对话框

((Button) findViewById(R.id.myButton))
    .setOnClickListener(new OnClickListener() {
    @Override
    public void onClick(View v) {
        datePickerDialog.show();
    }
});

Answer 4

以下代码有效..

datePickerButton.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            showDialog(0);
        }
    });

@Override
@Deprecated
protected Dialog onCreateDialog(int id) {
    return new DatePickerDialog(this, datePickerListener, year, month, day);
}

private DatePickerDialog.OnDateSetListener datePickerListener = new DatePickerDialog.OnDateSetListener() {
    public void onDateSet(DatePicker view, int selectedYear,
                          int selectedMonth, int selectedDay) {
        day = selectedDay;
        month = selectedMonth;
        year = selectedYear;
        datePickerButton.setText(selectedDay + " / " + (selectedMonth + 1) + " / "
                + selectedYear);
    }
};

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