Android模拟时钟自定义控件

package com.example.xiaoluo.myapplication;

import android.annotation.TargetApi;
import android.content.Context;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.Paint;
import android.os.Build;
import android.util.AttributeSet;
import android.view.View;

import java.util.Calendar;

/**
 * Created by xiaoluo on 2016/1/11.
 */
public class TimerView extends View {

    private int mWidthmHeight;

    public TimerView（Context context）{
        super（context）;
    }
    public TimerView（Context contextAttributeSet attrs）{
        super（contextattrs）;
    }
    public TimerView（Context context AttributeSet attrs int defstyleAttr） {
        super（context attrs defstyleAttr）;
    }

    @TargetApi（Build.VERSION_CODES.LOLLIPOP）
    @Override
    protected void onDraw（Canvas canvas） {

        //设置画布背景
        canvas.drawColor（Color.GRAY）;

        //获取屏幕宽度
        mWidth=getMeasuredWidth（）;
        //获取屏幕高度
        mHeight=getMeasuredHeight（）;

        //获取系统时间
        //Calendar里面月份的值是从0~11，对应1~12
        //星期几是从星期天开始算的
        Calendar calendar=Calendar.getInstance（）;
        int year=calendar.get（Calendar.YEAR）;
        int month=calendar.get（Calendar.MONTH）;
        int day=calendar.get（Calendar.DAY_OF_MONTH）;
        int week=calendar.get（Calendar.DAY_OF_WEEK）;
        String sYearsMonthsDaysWeek;
        sYear=String.valueOf（year）;
        sMonth=String.valueOf（month+1）;
        sDay=String.valueOf（day）;
        sWeek=String.valueOf（week）;
        if （week==1）{
            sWeek=“日“;
        }else if（week==2）{
            sWeek=“一“;
        }else if（week==3）{
            sWeek=“二“;
        }else if（week==4）{
            sWeek=“三“;
        }else if（week==5）{
            sWeek=“四“;
        }else if（week==6）{
            sWeek=“五“;
        }else if（week==7）{
            sWeek=“六“;
        }
        int hour=calendar.get（Calendar.HOUR_OF_DAY）;
        if （hour>12）{
            hour=hour-12;
        }
        int minute=calendar.get（Calendar.MINUTE）;
        int second=calendar.get（Calendar.SECOND）;

        //显示时间
        Paint paintTime=new Paint（）;
        paintTime.setColor（Color.BLUE）;
        //要先设置画笔颜色后，设置透明度才有效果
        paintTime.setAlpha（100）;
        paintTime.setStrokeWidth（25）;
        paintTime.setTextSize（50）;
        String mHour=String.valueOf（hour）;
        canvas.drawText（mHour mWidth / 2-80 mHeight / 2-130 paintTime）;
        canvas.drawText（“:“ mWidth / 2-20 mHeight / 2-130 paintTime）;
        String mMinute=String.valueOf（minute）;
        canvas.drawText（mMinute mWidth / 2 mHeight / 2-130 paintTime）;
        canvas.drawText（“:“ mWidth / 2+60 mHeight / 2-130 paintTime）;
        String mSecond=String.valueOf（second）;
        canvas.drawText（mSecondmWidth/2+80mHeight/2-130paintTime）;

        canvas.drawText（sYear+“.“+sMonth+“.“+sDay+“-----星期“+sWeekmWidth/2-200mHeight/2+180paintT