Android 自定义钟表view

package androidart.org.androidart.view;


import android.content.Context;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.Paint;
import android.support.annotation.Nullable;
import android.util.AttributeSet;
import android.util.Log;
import android.view.View;

import java.util.Calendar;

public class ClockView extends View{

    private float clockRadius = 300;
    private Paint clockPaint;
    private float centerX;
    private float centerY;
    private final static int HOURS = 12;
    private final static int HOUR_0 = 0;
    private final static int HOUR_3 = 3;
    private final static int HOUR_6 = 6;
    private final static int HOUR_9 = 9;
    private final static int HOUR_0_3_6_9_SIZE = 50;
    private final static int HOUR_OTHERS_SIZE = HOUR_0_3_6_9_SIZE/2;

    private final static int HOUR_ARROW_SIZE = 200;
    private final static int MINUTE_ARROW_SIZE = 250;
    private final static int SECOND_ARROW_SIZE = MINUTE_ARROW_SIZE;

    private Calendar calendar;
    private int currentHour;
    private int currentMinute;
    private int currentSecond;
    private static final int TIME_BASE = 60;

    Paint secondPaint = new Paint();

    public ClockView(Context context) {
        this(context,null);
    }

    public ClockView(Context context, @Nullable AttributeSet attrs) {
        this(context,attrs,-1);
    }

    public ClockView(Context context, @Nullable AttributeSet attrs, int defStyleAttr) {
        super(context, attrs, defStyleAttr);
        init();
    }

    private void init() {
        clockPaint = new Paint();
        clockPaint.setStyle(Paint.Style.STROKE);
        clockPaint.setStrokeWidth(10);
        centerX = getLeft()+clockRadius;
        centerY = getTop()+clockRadius;
    }

    private void drawHourBase(Canvas canvas) {
        for (int i=0;i
 
  start && num