Android开发之时间日期操作实例

相信对于手机的时间日期设置大家一定都不陌生吧，今天举一个关于时间日期设置的示例，其中有些许不完善之处，例如如何使设置的时间日期和手机系统同步等。感兴趣的读者可以根据自身经验加以完善。

现来看看具体示例，希望对大家有所帮助。

首先是时间设置：

.java文件（mainactivity.java）代码如下：

package com.example.activity_time_date;
import java.util.calendar;
import android.app.activity;
import android.app.dialog;
import android.app.timepickerdialog;
import android.content.intent;
import android.os.bundle;
import android.view.menu;
import android.view.menuitem;
import android.view.view;
import android.view.view.onclicklistener;
import android.widget.button;
import android.widget.textview;
import android.widget.timepicker;
public class mainactivity extends activity {
 private textview mytext = null;
 private button mybutton1 = null;
 private button mybutton2 = null;
 private int mhour;
 private int mminute;
 static final int time_dialog_id = 0;
 private timepickerdialog.ontimesetlistener mtimesetlistener = new timepickerdialog.ontimesetlistener() {
  @override
  public void ontimeset(timepicker view, int hourofday, int minute) {
   // todo auto-generated method stub
   mhour = hourofday;
   mminute = minute;
   updatedisplay();
  }
 };
 @override
 protected void oncreate(bundle savedinstancestate) {
  super.oncreate(savedinstancestate);
  setcontentview(r.layout.activity_main);
  mytext = (textview)findviewbyid(r.id.textview);
  mybutton1 = (button)findviewbyid(r.id.button1);
  mybutton2 = (button)findviewbyid(r.id.button2); 
  mybutton1.setonclicklistener(new onclicklistener() {
   @override
   public void onclick(view v) {
    // todo auto-generated method stub
    showdialog(time_dialog_id);
   }
  });
  mybutton2.setonclicklistener(new onclicklistener() {
   @override
   public void onclick(view v) {
    // todo auto-generated method stub
    mainactivity.this.startactivity(new intent(mainactivity.this, dateactivity.class));
   }
  });
  final calendar cal = calendar.getinstance();
  mhour = cal.get(calendar.hour_of_day);
  mminute = cal.get(calendar.minute);
  updatedisplay();
 }
 private void updatedisplay(){
  mytext.settext(new stringbuilder().append(pad(mhour)).append(":")
    .append(pad(mminute)));
 }
 private static string pad(int i){
  if (i >= 10)
   return string.valueof(i);
  else
   return "0" + string.valueof(i);
 }
 @override
 protected dialog oncreatedialog(int id) {
  switch (id) {
  case time_dialog_id:
   return new timepickerdialog(this, mtimesetlistener, mhour, mminute,
     false);
  }
  return null;
 }
}

布局文件(activity_main.xml)代码如下：

<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"
 tools:context="${relativepackage}.${activityclass}" >
<linearlayout 
  android:layout_width="fill_parent"
  android:layout_height="fill_parent"
  android:orientation="vertical"
 >
 <textview
  android:id="@+id/textview"
  android:layout_width="wrap_content"
  android:layout_height="wrap_content"
  />
 <button 
  android:id="@+id/button1"
  android:layout_width="fill_parent"
  android:layout_height="wrap_content"
  android:text="设置时间"
  />
 <button 
  android:id="@+id/button2"
  android:layout_width="fill_parent"
  android:layout_height="wrap_content"
  android:text="下一页"
  />
</linearlayout>
</relativelayout>
　　

运行效果如下图所示：

日期设置和时间设置基本一致，在此不再赘述。读者可以调试并改进本文示例代码，相信会有新的收获！