Android学习之监听日期和时间的改变

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">
  <EditText 
    android:id="@+id/input"
    android:layout_width="fill_parent"
    android:layout_height="wrap_content"/>
  <LinearLayout 
    xmlns:android="http://schemas.android.com/apk/res/android"
    android:orientation="horizontal" 
    android:layout_width="fill_parent"
    android:layout_height="fill_parent">
    <DatePicker
      android:id="@+id/date"
      android:layout_width="wrap_content"
      android:layout_height="wrap_content" />
    <TimePicker
      android:id="@+id/time"
      android:layout_width="wrap_content"
      android:layout_height="wrap_content" />
  </LinearLayout>
</LinearLayout>

package org.lxh.demo;

import android.app.Activity;
import android.os.Bundle;
import android.widget.DatePicker;
import android.widget.DatePicker.OnDateChangedListener;
import android.widget.EditText;
import android.widget.TimePicker;
import android.widget.TimePicker.OnTimeChangedListener;

public class MyDateTimeDemo extends Activity {
  private EditText input = null;
  private DatePicker date = null;
  private TimePicker time = null;

  @Override
  public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    super.setContentView(R.layout.main);
    this.input = (EditText) super.findViewById(R.id.input);
    this.date = (DatePicker) super.findViewById(R.id.date);
    this.time = (TimePicker) super.findViewById(R.id.time);
    this.time.setIs24HourView(true); // 采用24小时制显示时间
    this.time.setOnTimeChangedListener(new OnTimeChangedListenerImpl());
    this.date.init(this.date.getYear(), this.date.getMonth(),
        this.date.getDayOfMonth(), new OnDateChangedListenerImpl());
    this.setDateTime(); // 希望一开始可以设置一些文本的内容
  }

  private class OnTimeChangedListenerImpl implements OnTimeChangedListener {

    public void onTimeChanged(TimePicker view, int hourOfDay, int minute) {
      MyDateTimeDemo.this.setDateTime();
    }
  }

  private class OnDateChangedListenerImpl implements OnDateChangedListener {
    public void onDateChanged(DatePicker view, int year, int monthOfYear,
        int dayOfMonth) {
      MyDateTimeDemo.this.setDateTime();
    }
  }

  public void setDateTime() { // 由于日期时间更改之后文本输入组件的内容也要修改
    this.input.setText(this.date.getYear() + "-"
        + (this.date.getMonth() + 1) + "-" + this.date.getDayOfMonth()
        + " " + this.time.getCurrentHour() + ":"
        + this.time.getCurrentMinute()); // 修改文本的内容
  }
}