Android 程式开发：（十一）选择控件 —— 11.2 DatePicker

DataPicker和上一节讲的TimePicker很相似。使用DatePicker，可以让用户选择一个特定的日期。下面展示如何使用DatePicker。

1、使用上一节的工程，BasicViews4，修改main.xml。

[html]
<?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/btnSet"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:text="I am all set!"
    android:onClick="onClick" />

<DatePicker android:id="@+id/datePicker"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content" />

<TimePicker android:id="@+id/timePicker"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content" />

</LinearLayout>
2、F11调试。竖屏模式显式DatePicker稍微有一些窄，按Ctrl+F11，可以更改屏幕的显示方向。

3、在BasicViews4Activity.java中添加一些代码

[java]
package net.learn2develop.BasicViews4;

import java.text.SimpleDateFormat;
import java.util.Calendar;
import java.util.Date;

import android.app.Activity;
import android.app.DatePickerDialog;
import android.app.Dialog;
import android.app.TimePickerDialog;
import android.os.Bundle;
import android.view.View;
import android.widget.DatePicker;
import android.widget.TimePicker;
import android.widget.Toast;

public class BasicViews4Activity extends Activity {
    TimePicker timePicker;
    DatePicker datePicker;

    int hour, minute;
    int yr, month, day;

    static final int TIME_DIALOG_ID = 0;
    static final int DATE_DIALOG_ID = 1;

    /** Called when the activity is first created. */
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);

        timePicker = (TimePicker) findViewById(R.id.timePicker);
        timePicker.setIs24HourView(true);

        // showDialog(TIME_DIALOG_ID);
        datePicker = (DatePicker) findViewById(R.id.datePicker);

        //---get the current date---
        Calendar today = Calendar.getInstance();
        yr = today.get(Calendar.YEAR);
        month = today.get(Calendar.MONTH);
        day = today.get(Calendar.DAY_OF_MONTH);

        showDialog(DATE_DIALOG_ID);
    }

    @Override
    protected Dialog onCreateDialog(int id)
    {
        switch (id) {
        case TIME_DIALOG_ID:
            return new TimePickerDialog(
                    this, mTimeSetListener, hour, minute, false);
        case DATE_DIALOG_ID:
            return new DatePickerDialog(
                    this, mDateSetListener, yr, month, day);

        }
        return null;
    }

    private DatePickerDialog.OnDateSetListener mDateSetListener =
            new DatePickerDialog.OnDateSetListener()
    {
        public void onDateSet(
                DatePicker view, int year, int monthOfYear, int dayOfMonth)
        {
            yr = year;
            month = monthOfYear;
            day = dayOfMonth;
            Toast.makeText(getBaseContext(),
                    "You have selected : " + (month + 1) +
                    "/" + day + "/" + year,
                    Toast.LENGTH_SHORT).show();
        }
    };

    private TimePickerDialog.OnTimeSetListener mTimeSetListener =
            new TimePickerDialog.OnTimeSetListener()
    {
        public void onTimeSet(
                TimePicker view, int hourOfDay, int minuteOfHour)
        {
            hour = hourOfDay;
            minute = minuteOfHour;

            SimpleDateFormat timeFormat = new SimpleDateFormat("hh:mm aa");
            Date date = new Date(0,0,0, hour, minute);&n

补充：移动开发 , Android ,