Question

我正在开发一款需要用户选择日期的应用（dd / mm / yyyy）。我想在按钮单击时显示一个带有DatePicker的对话框。一旦选择了日期，它必须在EditText中显示。

我使用的是Android Studio 2.2，使用min sdk的项目是23。

请帮我做必要的代码。

Answer 1

予。在build.gradle中添加最新的appcompat库，时间为24.2.1

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

II。让您的活动扩展android.support.v7.app.AppCompatActivity并实施DatePickerDialog.OnDateSetListener界面。

public class MainActivity extends AppCompatActivity  
    implements DatePickerDialog.OnDateSetListener {

III。创建DatePickerDialog设置上下文，监听器的实现以及日期选择器的开始年份，月份和日期。

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

IV。在按钮的单击事件监听器上显示对话框

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

Answer 2

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 3

它对我有用。如果要启用将来的选择时间，则必须删除最长日期。你需要做类似的事情。

 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 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);
    }
};

如何在按钮上单击显示DatePickerDialog？

4 个答案: