Android39_Clock和TimePicker

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：