日期對話框DatePickerDialog

在Android應用中，設定日期和時間是非常簡單的事，由日期和時間對話框控件搞定。

一、界面

　　1、打開“src/com.genwoxue.datetimediy/active_main.java”檔案。

　　然後輸入以下代碼：

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:id="@+id/LinearLayout01"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    android:orientation="vertical" >

    <EditText
        android:id="@+id/et"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:enabled="false"
        android:cursorVisible="true" >
        
    </EditText>

    <Button
        android:id="@+id/dateBtn"
        android:layout_width="fill_parent"  
        android:layout_height="wrap_content"
        android:text="@string/date" />  <!-- fill_parent寬度填充整個螢幕 -->

    <Button
        android:id="@+id/timeBtn"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:text="@string/time" />

    <DigitalClock
        android:id="@+id/digitalClock"
        android:layout_width="fill_parent"
        android:textSize="20sp"
        android:gravity="center"
        android:layout_height="wrap_content" />

    <AnalogClock
        android:id="@+id/analogClock"
        android:layout_gravity="center"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content" />

</LinearLayout>
      

2、打開“src/com.genwoxue.datetimediy/MainActivity.java”檔案。

import java.util.Calendar;

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.view.View.OnClickListener;
import android.widget.Button;
import android.widget.DatePicker;
import android.widget.EditText;
import android.widget.TimePicker;

public class MainActivity extends Activity {
	private Button dateBtn = null;
	private Button timeBtn = null;
	private EditText et = null;
	private final static int DATE_DIALOG = 0;
	private final static int TIME_DIALOG = 1;
	private Calendar c = null;
	@Override
	protected void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.activity_main);
		et = (EditText) findViewById(R.id.et);
		dateBtn = (Button) findViewById(R.id.dateBtn);
		timeBtn = (Button) findViewById(R.id.timeBtn);
		dateBtn.setOnClickListener(new View.OnClickListener() {//這樣寫不用import android.view.View.OnClickListener;

			@SuppressWarnings("deprecation")
			@Override
			public void onClick(View v) {
				showDialog(DATE_DIALOG);//廢棄的自帶方法
			}
		});
		timeBtn.setOnClickListener(new OnClickListener() {//這樣寫要import android.view.View.OnClickListener;

			@Override
			public void onClick(View arg0) {
				showDialog(TIME_DIALOG);

			}
		});
	}
	//建立日期及時間選擇對話框
	protected Dialog onCreateDialog(int id){
		Dialog dialog = null;
		switch(id){
			case DATE_DIALOG:
				c = Calendar.getInstance();
				dialog = new DatePickerDialog(this,new DatePickerDialog.OnDateSetListener() {

					@Override
					public void onDateSet(DatePicker dp, int year, int month, int dayOfMonth) {
						et.setText("您選擇了："+year+"年"+(month+1)+"月"+dayOfMonth+"日");
					}
				}, c.get(Calendar.YEAR),//傳入年份
				  c.get(Calendar.MONTH),//傳入月份
				  c.get(Calendar.DAY_OF_MONTH));//傳入天數
				break;
			case TIME_DIALOG:
				c = Calendar.getInstance();
				dialog = new TimePickerDialog(this, new TimePickerDialog.OnTimeSetListener() {

					@Override
					public void onTimeSet(TimePicker view, int hourOfDay, int minute) {
						et.setText("您選擇了："+hourOfDay+"時"+minute+"分");
					}
				}, c.get(Calendar.HOUR_OF_DAY),
				   c.get(Calendar.MINUTE), 
				   false);
				break;
		}
		return dialog;

	}

}