自定义View构造方法的推荐写法

 原文地址：http://blog.csdn.net/wcs542882916

 public ZoomClock(Context context) {

    this(context,null);

  }

 

  public ZoomClock(Context context, AttributeSet attrs) {

    this(context, attrs, 0);

  }

 

  public ZoomClock(Context context, AttributeSet attrs,int defStyle) {

    super(context, attrs, defStyle);

    mContext = context;

    // this broadcast sent by system everyminute

    // Constant Value:"android.intent.action.TIME_TICK"

    mIntentFilter = new IntentFilter(Intent.ACTION_TIME_TICK);

    mTimeChangedBroadcastReceiver =new TimeChangedBroadcastReceiver();

}