DatePicker 日期抉择控件 DatePickerDialog 日期选择对话框

DatePicker 日期选择控件 DatePickerDialog 日期选择对话框

1.main.xml

< ?xml version="1.0" encoding="utf-8"?><linearlayout xmlns:android="http://schemas.android.com/apk/res/android" android:orientation="vertical" android:layout_width="fill_parent" android:layout_height="fill_parent">    <textview android:id="@+id/dateDisplay" android:layout_width="fill_parent" android:textsize="20sp" android:layout_height="wrap_content">     </textview>    <button android:text="改变日期" android:id="@+id/pickDate" android:textsize="20sp" android:layout_width="wrap_content" android:layout_height="wrap_content">    </button></linearlayout>

其中文本框用来显示时间，按钮为了触发日期选择对话框，当然用其他组件来触发日期选择对话框也是的。

2.java代码

?package android.basic.lesson10;

import java.util.Calendar;import android.app.Activity;import android.app.DatePickerDialog;import android.app.DatePickerDialog.OnDateSetListener;import android.app.Dialog;import android.os.Bundle;import android.view.View;import android.widget.Button;import android.widget.DatePicker;import android.widget.TextView;public class MainHelloDatePicker extends Activity {//准备公用属性    private TextView dateDisplay;    private Button pickDate;    private int mYear;    private int mMonth;    private int mDay;    //准备对话框Id    static final int DATE_DIALOG_ID = 0;    //准备日期设置监听器    private OnDateSetListener dsl = new DatePickerDialog.OnDateSetListener(){@Overridepublic void onDateSet(DatePicker view, int year, int monthOfYear,int dayOfMonth) {mYear =year;mMonth= monthOfYear;mDay= dayOfMonth;dateDisplay.setText(mYear+"-"+(mMonth+1)+"-"+mDay);}    };    //重写创建对话框方法    @Overrideprotected Dialog onCreateDialog(int id){    switch(id){    case DATE_DIALOG_ID:    //把Activity上下文、日期设置监听器、以及日期的年月日都作为参数传给那个新成立的对话框组件    return new DatePickerDialog(this, dsl, mYear, mMonth, mDay);    }    return null;    }    /** Called when the activity is first created. */    @Override    public void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.main);        //得到当前日期        final Calendar c = Calendar.getInstance();        mYear = c.get(Calendar.YEAR);        mMonth = c.get(Calendar.MONTH);        mDay = c.get(Calendar.DAY_OF_MONTH);        //获取xml中的组件        dateDisplay= (TextView)findViewById(R.id.dateDisplay);        pickDate = (Button)findViewById(R.id.pickDate);        //给日期显示组件一个初始值        dateDisplay.setText(mYear+"-"+(mMonth+1)+"-"+mDay);        //给按钮绑定点击监听器        pickDate.setOnClickListener(new View.OnClickListener() {            public void onClick(View v) {                showDialog(DATE_DIALOG_ID);            }        });    }}

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