扩展DigitalClock显示日期+时间

DigitalClock类:

 

package com.ex.view;

import java.text.SimpleDateFormat;
import java.util.Calendar;
import java.util.Date;

import android.content.Context;
import android.content.res.Resources;
import android.database.ContentObserver;
import android.os.Handler;
import android.os.SystemClock;
import android.provider.Settings;
import android.text.format.DateFormat;
import android.util.AttributeSet;

public class DigitalClock extends android.widget.DigitalClock{
	Calendar mCalendar;
	private final static String mFormat = "EEEE,MMMM-dd-yyyy hh:mm aa";//h:mm:ss aa
	private FormatChangeObserver mFormatChangeObserver;
	
	private Runnable mTicker;
	private Handler mHandler;
	
	private boolean mTickerStopped = false;
	
	public DigitalClock(Context context) {
		super(context);
		initClock(context);
	}
	
	public DigitalClock(Context context, AttributeSet attrs) {
        super(context, attrs);
        initClock(context);
    }
	
	private void initClock(Context context){
		Resources r = context.getResources();
		if(mCalendar == null){
			mCalendar = Calendar.getInstance();
		}
		mFormatChangeObserver = new FormatChangeObserver();
		getContext().getContentResolver().registerContentObserver(Settings.System.CONTENT_URI, true, mFormatChangeObserver);
		
	}
	
	@Override
	protected void onAttachedToWindow() {
		mTickerStopped = false;
		super.onAttachedToWindow();
		
		mHandler = new Handler();
		
		mTicker = new Runnable(){
			@Override
			public void run() {
				if(mTickerStopped){
					return ;
				}
				mCalendar.setTimeInMillis(System.currentTimeMillis());
				setText(DateFormat.format(mFormat, mCalendar));
				invalidate();
				long now = SystemClock.uptimeMillis();
                long next = now + (1000 - now % 1000);
                mHandler.postAtTime(mTicker, next);
			}
		};
		mTicker.run();
	}
	
	
		    
	private class FormatChangeObserver extends ContentObserver{

		public FormatChangeObserver() {
			super(new Handler());
		}
		
		@Override
		public void onChange(boolean selfChange) {
			
		}
	}
}

 

 

使用:

 

<?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"
    >
<com.ex.view.DigitalClock  
    android:layout_width="wrap_content" 
    android:layout_height="wrap_content" 
    />
</LinearLayout>