Question

我正在使用我在网上为datepicker找到的教程。但我想设置datepicker的最大和最小日期。我也听说过API级别低于11的问题。

我的代码：

package com.androidexample.datepicker;

import java.util.Calendar;
import android.app.Activity;
import android.app.DatePickerDialog;
import android.app.Dialog;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.DatePicker;
import android.widget.TextView;

public class DatePickerExample extends Activity {

    private TextView Output;
    private Button changeDate;

    private int year;
    private int month;
    private int day;

    static final int DATE_PICKER_ID = 1111; 

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);

        Output = (TextView) findViewById(R.id.Output);
        changeDate = (Button) findViewById(R.id.changeDate);

        // Get current date by calender

        final Calendar c = Calendar.getInstance();
        year  = c.get(Calendar.YEAR);
        month = c.get(Calendar.MONTH);
        day   = c.get(Calendar.DAY_OF_MONTH);

        // Show current date

        Output.setText(new StringBuilder()
                // Month is 0 based, just add 1
                .append(month + 1).append("-").append(day).append("-")
                .append(year).append(" "));

        // Button listener to show date picker dialog

        changeDate.setOnClickListener(new OnClickListener() {

            @Override
            public void onClick(View v) {

                // On button click show datepicker dialog 
                showDialog(DATE_PICKER_ID);

            }

        });
   }


    @Override
    protected Dialog onCreateDialog(int id) {
        switch (id) {
        case DATE_PICKER_ID:

            // open datepicker dialog. 
            // set date picker for current date 
            // add pickerListener listner to date picker
            return new DatePickerDialog(this, pickerListener, year, month,day);
        }
        return null;
    }

    private DatePickerDialog.OnDateSetListener pickerListener = new DatePickerDialog.OnDateSetListener() {

        // when dialog box is closed, below method will be called.
        @Override
        public void onDateSet(DatePicker view, int selectedYear,
                int selectedMonth, int selectedDay) {

            year  = selectedYear;
            month = selectedMonth;
            day   = selectedDay;

            // Show selected date 
            Output.setText(new StringBuilder().append(month + 1)
                    .append("-").append(day).append("-").append(year)
                    .append(" "));

           }
        };

}

xml代码：

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    android:orientation="vertical" >

    <Button
        android:id="@+id/changeDate"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="Click To Change Date" />

    <TextView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="Current/Selected Date (M-D-YYYY): "
        android:textAppearance="?android:attr/textAppearanceLarge" />

    <TextView
        android:id="@+id/Output"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text=""
        android:textAppearance="?android:attr/textAppearanceLarge" />



</LinearLayout>

上面代码的问题是年份部分没有上限。我也需要年份部分的下限。有人告诉我如何修改代码来设置上限和下限年份部分？

Answer 1

在DatePickerDialog.OnDateSetListener()中，您可以将月份，年份，日期与指定的最短和最长日期进行比较。

Answer 2

您可以使用DatePicker获取DatePickerDialog。

DatePickerDialog dialog = new DatePickerDialog(this, pickerListener, year, month,day);
//calculate min and max dates (you can use, Calender API or Joda Time, just search for it.
dialog.getDatePicker().setMaxDate(maxDate.getTime());
dialog.getDatePicker().setMinDate(minDate.getTime());
return dialog;

Answer 3

您只需调用getDatePicker()即可从DatePickerDialog获取基础DatePicker，并使用以下命令设置其边界：

setMinDate(long minDate)

setMaxDate(long maxDate)

这仅适用于API级别11及以上版本。

如何在android中设置datepicker的最大和最小日期

3 个答案: