android Digital Clock

package net.flync.pc2.tv.widget;



import java.util.Calendar;



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 m12 = "aa h:mm";//h:mm:ss aa

private final static String m24 = "k:mm";//k:mm:ss

private FormatChangeObserver mFormatChangeObserver;



private Runnable mTicker;

private Handler mHandler;



private boolean mTickerStopped = false;



String mFormat;



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);



setFormat();

}



@Override

protected void onAttachedToWindow() {

mTickerStopped = false;

super.onAttachedToWindow();

mHandler = new Handler();



/**

* requests a tick on the next hard-second boundary

*/

mTicker = new Runnable() {

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();

}



@Override

protected void onDetachedFromWindow() {

super.onDetachedFromWindow();

mTickerStopped = true;

}



/**

* Pulls 12/24 mode from system settings

*/

private boolean get24HourMode() {

return android.text.format.DateFormat.is24HourFormat(getContext());

}



private void setFormat() {

if (get24HourMode()) {

mFormat = m24;

} else {

mFormat = m12;

}

}



private class FormatChangeObserver extends ContentObserver {

public FormatChangeObserver() {

super(new Handler());

}



@Override

public void onChange(boolean selfChange) {

setFormat();

}

}

}