一、AnalogClock和DigitalClock
?????? AnalogClock和DigitalClock都是Android的时钟组件。不同点在于AnalogClock是一个圆形的表盘时钟，具有时针和分针。DigitalClock则是一个文本样式的时钟，如21：43：15。
?????? 这两种时钟都很简单易用，只要在布局文件中配置即可。
<?xml version="1.0" encoding="utf-8"?><RelativeLayout android:layout_width="fill_parent" android:layout_height="fill_parent" xmlns:android="http://schemas.android.com/apk/res/android"> <AnalogClock android:id="@+id/analogClock" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_centerHorizontal="true" android:layout_alignParentTop="true"></AnalogClock> <DigitalClock android:id="@+id/digitalClock" android:text="digitalClock" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_centerHorizontal="true" android:layout_below="@id/analogClock"></DigitalClock></RelativeLayout>
?运行结果：
?
?二、TimePicker和TimePickerDialog
?????? TimePicker用于直接在界面上显示设置时间。TimePickerDialog则是以对话框的形式显示时间设置界面。
TimePicker实例：
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"><TimePicker android:id="@+id/timePicker" android:layout_width="fill_parent" android:layout_height="wrap_content"/> <TextView android:id="@+id/timetext" android:layout_width="fill_parent" android:layout_height="wrap_content"/></LinearLayout>?
TimePickerActivity.java
package com.android.activity;import android.app.Activity;import android.os.Bundle;import android.widget.TextView;import android.widget.TimePicker;import android.widget.TimePicker.OnTimeChangedListener;public class TimePickerActivity extends Activity { private TimePicker timePicker = null; private TextView textView = null; @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.main); timePicker = (TimePicker)findViewById(R.id.timePicker); textView = (TextView)findViewById(R.id.timetext); timePicker.setOnTimeChangedListener(new TimePickerListener()); } class TimePickerListener implements OnTimeChangedListener{ public void onTimeChanged(TimePicker view, int hourOfDay, int minute) { textView.setText("您设置的时间是: " + hourOfDay + "时" + minute + "分"); } }}??运行结果：
?
?TimePickerDialog实例：
TimePickerDialogActivity.java
package com.android.activity;import java.util.Calendar;import android.app.Activity;import android.app.TimePickerDialog;import android.app.TimePickerDialog.OnTimeSetListener;import android.os.Bundle;import android.widget.TextView;import android.widget.TimePicker;public class TimePickerDialogActivity extends Activity { private TextView textView = null; @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.main); textView = (TextView)findViewById(R.id.textview); //得到时间 Calendar calendar = Calendar.getInstance(); int hour = calendar.get(Calendar.HOUR_OF_DAY); int minute = calendar.get(Calendar.MINUTE); TimePickerDialogListener timeSet = new TimePickerDialogListener(); //参数分别为：context、监听器、初始时间、初始分钟、是24小时显示false为AM/PM TimePickerDialog timePickerDialog = new TimePickerDialog(this, timeSet, hour, minute, true); timePickerDialog.show(); } class TimePickerDialogListener implements OnTimeSetListener{ //点击设置时即会调用 public void onTimeSet(TimePicker view,int hourOfDay,int minute) { String time = "您设置的时间为："+hourOfDay+":"+minute; textView.setText(time); } }}?运行结果：设置界面
?设置完成后：
