简单的修改Android DigitalClock

最近在做项目中，需要用到一个时间显示的控件，由于android自身DigitalClock只能显示时间，不能显示日期，所以自己就动手对DigitalClock做了一个小小的改造

android自带的效果如下：

改造后的效果：

public class TimeWidget extends TextView {
 
     Calendar mCalendar;
     private final static String m12 = "h:mm:ss";
     private final static String m24 = "k:mm:ss";
     private FormatChangeObserver mFormatChangeObserver;
 
     private Runnable mTicker;
     private Handler mHandler;
 
     private boolean mTickerStopped = false;
 
     String mFormat;
 
     private static String[] weekdays = { "星期日", "星期一", "星期二", "星期三", "星期四", "星期五", "星期六" };
 
     public TimeWidget(Context context, AttributeSet attrs, int defStyle) {
         super(context, attrs, defStyle);
         initClock(context);
     }
 
     public TimeWidget(Context context, AttributeSet attrs) {
         super(context, attrs);
         initClock(context);
     }
 
     public TimeWidget(Context context) {
         super(context);
         initClock(context);
     }
 
     private void initClock(Context context) {
         Resources r = context.getResources();
 
         if (mCalendar == null) {
             mCalendar = Calendar.getInstance();
         }
 
         mFormatChangeObserver = new FormatChangeObserver();
         //注册，监听系统日期设置数据库的改变
         getContext().getContentResolver().registerContentObserver(Settings.System.CONTENT_URI, true, mFormatChangeObserver);
 
         setFormat();
     }
 
     @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;
         }
     }
 
     // format the string of time
     private static String format(int t) {
         String s = "" + t;
         if (s.length() == 1) {
             s = "0" + s;
         }
         return s;
     }
 
     @Override
     public boolean onTouchEvent(MotionEvent event) {
         Log.i("", "TimeWidget.onTouchEvent");
 
         getContext().startActivity(new Intent(android.provider.Settings.ACTION_DATE_SETTINGS));
 
         return super.onTouchEvent(event);
     }
 
     @Override
     protected void onAttachedToWindow() {
         Log.i("", "TimeWidget.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());
 
                 int myear = (mCalendar.get(Calendar.YEAR));
                 int mmonth = (mCalendar.get(Calendar.MONTH) + 1);// 月份+1是一年中的第几个月
                 int mmonthday = (mCalendar.get(Calendar.DAY_OF_MONTH));// 一月中的日期
                 final int mweekday = (mCalendar.get(Calendar.DAY_OF_WEEK)) - 1;
 
                 final String mDate = format(myear) + "-" + format(mmonth) + "-" + format(mmonthday);
 
                 setText(DateFormat.format(mFormat, mCalendar) + "  " + mDate + " " + weekdays[mweekday]);
                 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) {
             setFormat();
         }
     }
 
 }