Activityインタフェースのデジタルスケジュール

package ;

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 = "h:mm aa";//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 interface OnMyDestoryListener{
        public void  OnMyDestory();
    }

    private OnMyDestoryListener mOnMyDestoryListener;

    public void setOnMyDestoryListener(OnMyDestoryListener l){
        mOnMyDestoryListener = l;
    }

    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;
        if(mOnMyDestoryListener != null){
            mOnMyDestoryListener.OnMyDestory();
        }
    }

    /**
     * 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();
        }
    }
}

        <!--   -->
        <hdp.li.fans.wedgit.DigitalClock
            android:layout_width="wrap_content"
            android:layout_height="fill_parent"
            android:layout_gravity="center"
            android:layout_marginTop="5sp"
            android:gravity="center_horizontal|center_vertical"
            android:textColor="@color/clock"
            android:textSize="20sp" >
        </hdp.li.fans.wedgit.DigitalClock>