DatePicker示例

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//DatePicker-----------------MainActivity.java-----------------package com.example.gby.s01_e16_datepicker;import android.support.v7.app.AppCompatActivity;import android.os.Bundle;import android.view.View;import android.widget.Button;import android.widget.DatePicker;public class MainActivity extends AppCompatActivity {    private DatePicker datePicker;    private Button button;    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_main);        datePicker = (DatePicker)findViewById(R.id.firstDatePicker);        button = (Button)findViewById(R.id.button);//找到ID        datePicker.updateDate(2016,7,24);//设置时间,java的month从0-11        ButtonListener buttonListener = new ButtonListener();        button.setOnClickListener(buttonListener);    }    class ButtonListener implements View.OnClickListener{        @Override        public void onClick(View view) {            int year = datePicker.getYear();            int month = datePicker.getMonth();            int day = datePicker.getDayOfMonth();            System.out.println("y:"+year+",m:"+month+",d:"+day);        }    }}

-----------------activity_main.xml-----------------<?xml version="1.0" encoding="utf-8"?><RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"    xmlns:tools="http://schemas.android.com/tools"    android:layout_width="match_parent"    android:layout_height="match_parent"    android:paddingBottom="@dimen/activity_vertical_margin"    android:paddingLeft="@dimen/activity_horizontal_margin"    android:paddingRight="@dimen/activity_horizontal_margin"    android:paddingTop="@dimen/activity_vertical_margin"    tools:context="com.example.gby.s01_e16_datepicker.MainActivity">    <DatePicker        android:id="@+id/firstDatePicker"        android:layout_width="wrap_content"        android:layout_height="wrap_content"></DatePicker>    <Button        android:id="@+id/button"        android:layout_width="match_parent"        android:layout_height="wrap_content"        android:layout_below="@id/firstDatePicker"        android:text="获取DatePicker的值"        /></RelativeLayout>

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