Android 日历控件CalendarView

UI需求图，就是是最终要达到的效果图：

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Apk下载
控件类下载

分析：
日历控件总会是千变万化的变，那么我们就对标题进行单独布局就行了，对下面的日期进行自定义控件，这样下一次不管你UI怎么设计图，对我都没什么影响的，我只需要改字体颜色和日历的标题布局就行了。那么此次需要的知识点就需要，阳历和农历的互相转换，一个月总天数，天数第一天对应的是周几，数字转汉字显示。如果把这些问题考虑完了就不需要考虑其他的了。

知识点
（1）农历和阳历的转换(博客链接：https://blog.csdn.net/mexican_jacky/article/details/51537571)

import java.util.Calendar;

/**
 * Created by Relin
 * on 2018-08-08.
 */


public class CalendarHelper {

    static class Lunar {
        public boolean isleap;
        public int lunarDay;
        public int lunarMonth;
        public int lunarYear;
    }

    static class Solar {
        public int solarDay;
        public int solarMonth;
        public int solarYear;
    }

    private static int[] lunar_month_days = {1887, 0x1694, 0x16aa, 0x4ad5, 0xab6, 0xc4b7, 0x4ae, 0xa56, 0xb52a, 0x1d2a,
            0xd54, 0x75aa, 0x156a, 0x1096d, 0x95c, 0x14ae, 0xaa4d, 0x1a4c, 0x1b2a, 0x8d55, 0xad4, 0x135a, 0x495d, 0x95c,
            0xd49b, 0x149a, 0x1a4a, 0xbaa5, 0x16a8, 0x1ad4, 0x52da, 0x12b6, 0xe937, 0x92e, 0x1496, 0xb64b, 0xd4a, 0xda8,
            0x95b5, 0x56c, 0x12ae, 0x492f, 0x92e, 0xcc96, 0x1a94, 0x1d4a, 0xada9, 0xb5a, 0x56c, 0x726e, 0x125c, 0xf92d,
            0x192a, 0x1a94, 0xdb4a, 0x16aa, 0xad4, 0x955b, 0x4ba, 0x125a, 0x592b, 0x152a, 0xf695, 0xd94, 0x16aa, 0xaab5,
            0x9b4, 0x14b6, 0x6a57, 0xa56, 0x1152a, 0x1d2a, 0xd54, 0xd5aa, 0x156a, 0x96c, 0x94ae, 0x14ae, 0xa4c, 0x7d26,
            0x1b2a, 0xeb55, 0xad4, 0x12da, 0xa95d, 0x95a, 0x149a, 0x9a4d, 0x1a4a, 0x11aa5, 0x16a8, 0x16d4, 0xd2da,
            0x12b6, 0x936, 0x9497, 0x1496, 0x1564b, 0xd4a, 0xda8, 0xd5b4, 0x156c, 0x12ae, 0xa92f, 0x92e, 0xc96, 0x6d4a,
            0x1d4a, 0x10d65, 0xb58, 0x156c, 0xb26d, 0x125c, 0x192c, 0x9a95, 0x1a94, 0x1b4a, 0x4b55, 0xad4, 0xf55b,
            0x4ba, 0x125a, 0xb92b, 0x152a, 0x1694, 0x96aa, 0x15aa, 0x12ab5, 0x974, 0x14b6, 0xca57, 0xa56, 0x1526,
            0x8e95, 0xd54, 0x15aa, 0x49b5, 0x96c, 0xd4ae, 0x149c, 0x1a4c, 0xbd26, 0x1aa6, 0xb54, 0x6d6a, 0x12da,
            0x1695d, 0x95a, 0x149a, 0xda4b, 0x1a4a, 0x1aa4, 0xbb54, 0x16b4, 0xada, 0x495b, 0x936, 0xf497, 0x1496,
            0x154a, 0xb6a5, 0xda4, 0x15b4, 0x6ab6, 0x126e, 0x1092f, 0x92e, 0xc96, 0xcd4a, 0x1d4a, 0xd64, 0x956c, 0x155c,
            0x125c, 0x792e, 0x192c, 0xfa95, 0x1a94, 0x1b4a, 0xab55, 0xad4, 0x14da, 0x8a5d, 0xa5a, 0x1152b, 0x152a,
            0x1694, 0xd6aa, 0x15aa, 0xab4, 0x94ba, 0x14b6, 0xa56, 0x7527, 0xd26, 0xee53, 0xd54, 0x15aa, 0xa9b5, 0x96c,
            0x14ae, 0x8a4e, 0x1a4c, 0x11d26, 0x1aa4, 0x1b54, 0xcd6a, 0xada, 0x95c, 0x949d, 0x149a, 0x1a2a, 0x5b25,
            0x1aa4, 0xfb52, 0x16b4, 0xaba, 0xa95b, 0x936, 0x1496, 0x9a4b, 0x154a, 0x136a5, 0xda4, 0x15ac};

    private static int[] solar_1_1 = {1887, 0xec04c, 0xec23f, 0xec435, 0xec649, 0xec83e, 0xeca51, 0xecc46, 0xece3a,
            0xed04d, 0xed242, 0xed436, 0xed64a, 0xed83f, 0xeda53, 0xedc48, 0xede3d, 0xee050, 0xee244, 0xee439, 0xee64d,
            0xee842, 0xeea36, 0xeec4a, 0xeee3e, 0xef052, 0xef246, 0xef43a, 0xef64e, 0xef843, 0xefa37, 0xefc4b, 0xefe41,
            0xf0054, 0xf0248, 0xf043c, 0xf0650, 0xf0845, 0xf0a38, 0xf0c4d, 0xf0e42, 0xf1037, 0xf124a, 0xf143e, 0xf1651,
            0xf1846, 0xf1a3a, 0xf1c4e, 0xf1e44, 0xf2038, 0xf224b, 0xf243f, 0xf2653, 0xf2848, 0xf2a3b, 0xf2c4f, 0xf2e45,
            0xf3039, 0xf324d, 0xf3442, 0xf3636, 0xf384a, 0xf3a3d, 0xf3c51, 0xf3e46, 0xf403b, 0xf424e, 0xf4443, 0xf4638,
            0xf484c, 0xf4a3f, 0xf4c52, 0xf4e48, 0xf503c, 0xf524f, 0xf5445, 0xf5639, 0xf584d, 0xf5a42, 0xf5c35, 0xf5e49,
            0xf603e, 0xf6251, 0xf6446, 0xf663b, 0xf684f, 0xf6a43, 0xf6c37, 0xf6e4b, 0xf703f, 0xf7252, 0xf7447, 0xf763c,
            0xf7850, 0xf7a45, 0xf7c39, 0xf7e4d, 0xf8042, 0xf8254, 0xf8449, 0xf863d, 0xf8851, 0xf8a46, 0xf8c3b, 0xf8e4f,
            0xf9044, 0xf9237, 0xf944a, 0xf963f, 0xf9853, 0xf9a47, 0xf9c3c, 0xf9e50, 0xfa045, 0xfa238, 0xfa44c, 0xfa641,
            0xfa836, 0xfaa49, 0xfac3d, 0xfae52, 0xfb047, 0xfb23a, 0xfb44e, 0xfb643, 0xfb837, 0xfba4a, 0xfbc3f, 0xfbe53,
            0xfc048, 0xfc23c, 0xfc450, 0xfc645, 0xfc839, 0xfca4c, 0xfcc41, 0xfce36, 0xfd04a, 0xfd23d, 0xfd451, 0xfd646,
            0xfd83a, 0xfda4d, 0xfdc43, 0xfde37, 0xfe04b, 0xfe23f, 0xfe453, 0xfe648, 0xfe83c, 0xfea4f, 0xfec44, 0xfee38,
            0xff04c, 0xff241, 0xff436, 0xff64a, 0xff83e, 0xffa51, 0xffc46, 0xffe3a, 0x10004e, 0x100242, 0x100437,
            0x10064b, 0x100841, 0x100a53, 0x100c48, 0x100e3c, 0x10104f, 0x101244, 0x101438, 0x10164c, 0x101842,
            0x101a35, 0x101c49, 0x101e3d, 0x102051, 0x102245, 0x10243a, 0x10264e, 0x102843, 0x102a37, 0x102c4b,
            0x102e3f, 0x103053, 0x103247, 0x10343b, 0x10364f, 0x103845, 0x103a38, 0x103c4c, 0x103e42, 0x104036,
            0x104249, 0x10443d, 0x104651, 0x104846, 0x104a3a, 0x104c4e, 0x104e43, 0x105038, 0x10524a, 0x10543e,
            0x105652, 0x105847, 0x105a3b, 0x105c4f, 0x105e45, 0x106039, 0x10624c, 0x106441, 0x106635, 0x106849,
            0x106a3d, 0x106c51, 0x106e47, 0x10703c, 0x10724f, 0x107444, 0x107638, 0x10784c, 0x107a3f, 0x107c53,
            0x107e48};

    private static int GetBitInt(int data, int length, int shift) {
        return (data & (((1 << length) - 1) << shift)) >> shift;
    }

    // WARNING: Dates before Oct. 1582 are inaccurate
    private static long solarToInt(int y, int m, int d) {
        m = (m + 9) % 12;
        y = y - m / 10;
        return 365 * y + y / 4 - y / 100 + y / 400 + (m * 306 + 5) / 10 + (d - 1);
    }

    /**
     * @param lunarYear 农历年份
     * @return String of Ganzhi: 甲子年 Tiangan:甲乙丙丁戊己庚辛壬癸

     * Dizhi: 子丑寅卯辰巳无为申酉戌亥
     */
    public static String lunarYearToGanZhi(int lunarYear) {
        final String[] tianGan = {"甲", "乙", "丙", "丁", "戊", "己", "庚", "辛", "壬", "癸"};
        final String[] diZhi = {"子", "丑", "寅", "卯", "辰", "巳", "午", "未", "申", "酉", "戌", "亥"};
        return tianGan[(lunarYear - 4) % 10] + diZhi[(lunarYear - 4) % 12] + "年";
    }

    private static Solar solarFromInt(long g) {
        long y = (10000 * g + 14780) / 3652425;
        long ddd = g - (365 * y + y / 4 - y / 100 + y / 400);
        if (ddd < 0) {
            y--;
            ddd = g - (365 * y + y / 4 - y / 100 + y / 400);
        }
        long mi = (100 * ddd + 52) / 3060;
        long mm = (mi + 2) % 12 + 1;
        y = y + (mi + 2) / 12;
        long dd = ddd - (mi * 306 + 5) / 10 + 1;
        Solar solar = new Solar();
        solar.solarYear = (int) y;
        solar.solarMonth = (int) mm;
        solar.solarDay = (int) dd;
        return solar;
    }

    /**
     * 农历转公历
     */
    public static Solar lunarToSolar(Lunar lunar) {
        int days = lunar_month_days[lunar.lunarYear - lunar_month_days[0]];
        int leap = GetBitInt(days, 4, 13);
        int offset = 0;
        int loopend = leap;
        if (!lunar.isleap) {
            if (lunar.lunarMonth <= leap || leap == 0) {
                loopend = lunar.lunarMonth - 1;
            } else {
                loopend = lunar.lunarMonth;
            }
        }
        for (int i = 0; i < loopend; i++) {
            offset += GetBitInt(days, 1, 12 - i) == 1 ? 30 : 29;
        }
        offset += lunar.lunarDay;

        int solar11 = solar_1_1[lunar.lunarYear - solar_1_1[0]];

        int y = GetBitInt(solar11, 12, 9);
        int m = GetBitInt(solar11, 4, 5);
        int d = GetBitInt(solar11, 5, 0);

        return solarFromInt(solarToInt(y, m, d) + offset - 1);
    }

    /**
     * 公历转农历
     */
    public static Lunar solarToLunar(Solar solar) {
        Lunar lunar = new Lunar();
        int index = solar.solarYear - solar_1_1[0];
        int data = (solar.solarYear << 9) | (solar.solarMonth << 5) | (solar.solarDay);
        int solar11 = 0;
        if (solar_1_1[index] > data) {
            index--;
        }
        solar11 = solar_1_1[index];
        int y = GetBitInt(solar11, 12, 9);
        int m = GetBitInt(solar11, 4, 5);
        int d = GetBitInt(solar11, 5, 0);
        long offset = solarToInt(solar.solarYear, solar.solarMonth, solar.solarDay) - solarToInt(y, m, d);

        int days = lunar_month_days[index];
        int leap = GetBitInt(days, 4, 13);

        int lunarY = index + solar_1_1[0];
        int lunarM = 1;
        int lunarD = 1;
        offset += 1;

        for (int i = 0; i < 13; i++) {
            int dm = GetBitInt(days, 1, 12 - i) == 1 ? 30 : 29;
            if (offset > dm) {
                lunarM++;
                offset -= dm;
            } else {
                break;
            }
        }
        lunarD = (int) (offset);
        lunar.lunarYear = lunarY;
        lunar.lunarMonth = lunarM;
        lunar.isleap = false;
        if (leap != 0 && lunarM > leap) {
            lunar.lunarMonth = lunarM - 1;
            if (lunarM == leap + 1) {
                lunar.isleap = true;
            }
        }

        lunar.lunarDay = lunarD;
        return lunar;
    }

    final static String chineseNumber[] = {"一", "二", "三", "四", "五", "六", "七", "八", "九", "十", "十一", "十二"};

    public static String solarToLunarDay(int day) {
        String chineseTen[] = {"初", "十", "廿", "卅"};
        int n = day % 10 == 0 ? 9 : day % 10 - 1;
        if (day > 30)
            return "";
        if (day == 10)
            return "初十";
        else
            return chineseTen[day / 10] + chineseNumber[n];
    }


    /**
     * 得到指定月的天数
     */
    public static int monthOfLastDay(int year, int month) {
        Calendar a = Calendar.getInstance();
        a.set(Calendar.YEAR, year);
        a.set(Calendar.MONTH, month - 1);
        a.set(Calendar.DATE, 1);//把日期设置为当月第一天
        a.roll(Calendar.DATE, -1);//日期回滚一天，也就是最后一天
        int maxDate = a.get(Calendar.DATE);
        return maxDate;
    }

}

（2）一个月总天数

    public static int monthOfLastDay(int year, int month) {
        Calendar a = Calendar.getInstance();
        a.set(Calendar.YEAR, year);
        a.set(Calendar.MONTH, month - 1);
        a.set(Calendar.DATE, 1);//把日期设置为当月第一天
        a.roll(Calendar.DATE, -1);//日期回滚一天，也就是最后一天
        int maxDate = a.get(Calendar.DATE);
        return maxDate;
    }

（3）阳历文字转农历文字

    final static String chineseNumber[] = {"一", "二", "三", "四", "五", "六", "七", "八", "九", "十", "十一", "十二"};
    public static String solarToLunarDay(int day) {
        String chineseTen[] = {"初", "十", "廿", "卅"};
        int n = day % 10 == 0 ? 9 : day % 10 - 1;
        if (day > 30)
            return "";
        if (day == 10)
            return "初十";
        else
            return chineseTen[day / 10] + chineseNumber[n];
    }

日历Item数据类

public class CalendarItem {

    //阳历
    private String solarCalendarText;
    //农历
    private String lunarCalendarText;
    //是否是节日
    private boolean isFestival;
    //节日名称
    private String festivalName;
    //坐标值
    private float solarX = 0F;
    private float solarY = 0F;
    //坐标值
    private float lunarX = 0F;
    private float lunarY = 0F;
    //坐标范围
    private float minCoordinates[];
    private float maxCoordinates[];
    //宽高
    private float width;
    private float height;
    //阳历字体大小
    private float solarTextSize;
    //农历字体大小
    private float lunarTextSize;
    //阳历字体颜色
    private int solarTextColor;
    //农历字体颜色
    private int lunarTextColor;
    //节日字体颜色
    private int festivalTextColor;
    //是选中
    private boolean isSelect;
    //选中颜色
    private int selectColor;
    //Item位置
    private int position[];


    public String getSolarCalendarText() {
        return solarCalendarText;
    }

    public void setSolarCalendarText(String solarCalendarText) {
        this.solarCalendarText = solarCalendarText;
    }

    public String getLunarCalendarText() {
        return lunarCalendarText;
    }

    public void setLunarCalendarText(String lunarCalendarText) {
        this.lunarCalendarText = lunarCalendarText;
    }

    public boolean isFestival() {
        return isFestival;
    }

    public void setFestival(boolean festival) {
        isFestival = festival;
    }

    public String getFestivalName() {
        return festivalName;
    }

    public void setFestivalName(String festivalName) {
        this.festivalName = festivalName;
    }


    public float getSolarX() {
        return solarX;
    }

    public void setSolarX(float solarX) {
        this.solarX = solarX;
    }

    public float getSolarY() {
        return solarY;
    }

    public void setSolarY(float solarY) {
        this.solarY = solarY;
    }

    public float getLunarX() {
        return lunarX;
    }

    public void setLunarX(float lunarX) {
        this.lunarX = lunarX;
    }

    public float getLunarY() {
        return lunarY;
    }

    public void setLunarY(float lunarY) {
        this.lunarY = lunarY;
    }

    public float[] getMinCoordinates() {
        return minCoordinates;
    }

    public void setMinCoordinates(float[] minCoordinates) {
        this.minCoordinates = minCoordinates;
    }

    public float[] getMaxCoordinates() {
        return maxCoordinates;
    }

    public void setMaxCoordinates(float[] maxCoordinates) {
        this.maxCoordinates = maxCoordinates;
    }

    public float getWidth() {
        return width;
    }

    public void setWidth(float width) {
        this.width = width;
    }

    public float getHeight() {
        return height;
    }

    public void setHeight(float height) {
        this.height = height;
    }

    public float getSolarTextSize() {
        return solarTextSize;
    }

    public void setSolarTextSize(float solarTextSize) {
        this.solarTextSize = solarTextSize;
    }

    public float getLunarTextSize() {
        return lunarTextSize;
    }

    public void setLunarTextSize(float lunarTextSize) {
        this.lunarTextSize = lunarTextSize;
    }

    public int getSolarTextColor() {
        return solarTextColor;
    }

    public void setSolarTextColor(int solarTextColor) {
        this.solarTextColor = solarTextColor;
    }

    public int getLunarTextColor() {
        return lunarTextColor;
    }

    public void setLunarTextColor(int lunarTextColor) {
        this.lunarTextColor = lunarTextColor;
    }

    public int getFestivalTextColor() {
        return festivalTextColor;
    }

    public void setFestivalTextColor(int festivalTextColor) {
        this.festivalTextColor = festivalTextColor;
    }

    public boolean isSelect() {
        return isSelect;
    }

    public void setSelect(boolean select) {
        isSelect = select;
    }

    public int getSelectColor() {
        return selectColor;
    }

    public void setSelectColor(int selectColor) {
        this.selectColor = selectColor;
    }


    public int[] getPosition() {
        return position;
    }

    public void setPosition(int[] position) {
        this.position = position;
    }
}

日历控件源码

import android.content.Context;
import android.content.res.Resources;
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.MotionEvent;
import android.view.View;

import java.util.ArrayList;
import java.util.Calendar;
import java.util.List;

/**
 * Created by Relin
 * on 2018/8/7.
 * 日历控件
 */

public class CalendarView extends View {

    /**
     * 行数
     */
    private int row = 6;
    /**
     * 列数
     */
    private int column = 7;
    /**
     * 控件宽度
     */
    private float width;
    /**
     * 控件高度
     */
    private float height;
    /**
     * 今天的星期
     */
    private int todayWeek;
    /**
     * 月份总天数
     */
    private int monthDayTotal;
    /**
     * 年
     */
    private int year;
    /**
     * 月
     */
    private int month;
    /**
     * 日
     */
    private int day;
    /**
     * Item宽度
     */
    private float itemWidth;
    /**
     * Item高度
     */
    private float itemHeight;
    /**
     * Item背景半径
     */
    private float itemBgRadius = dpToPx(16F);
    /**
     * Item位置
     */
    private int[] selectPosition;
    /**
     * Item链表
     */
    private List items = new ArrayList<>();


    public CalendarView(Context context) {
        super(context);
    }


    public CalendarView(Context context, @Nullable AttributeSet attrs) {
        super(context, attrs);
    }


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


    @Override
    protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
        super.onMeasure(widthMeasureSpec, heightMeasureSpec);
        width = getMeasuredWidth();
        height = getMeasuredHeight();

        row = todayWeek > 5 ? 6 : 5;//大于周四6行
        itemWidth = (width) / (column);
        itemHeight = (height) / (row);

        Calendar calendar = Calendar.getInstance();
        todayWeek = calendar.get(Calendar.DAY_OF_WEEK);//1星期天
        year = calendar.get(Calendar.YEAR);
        month = calendar.get(Calendar.MONTH) + 1;
        day = calendar.get(Calendar.DAY_OF_MONTH);
        monthDayTotal = CalendarHelper.monthOfLastDay(year, month);
    }


    @Override
    public boolean onTouchEvent(MotionEvent event) {
        switch (event.getAction()) {
            case MotionEvent.ACTION_DOWN:

                break;
            case MotionEvent.ACTION_UP:

                float upX = event.getX();
                float upY = event.getY();

                for (int i = 0; i < items.size(); i++) {
                    CalendarItem item = items.get(i);
                    float minX = item.getMinCoordinates()[0];
                    float maxX = item.getMaxCoordinates()[0];
                    float minY = item.getMinCoordinates()[1];
                    float maxY = item.getMaxCoordinates()[1];
                    if (upX >= minX && upX <= maxX && upY >= minY && upY <= maxY) {
                        selectPosition = item.getPosition();
                        if (listener != null) {
                            listener.onItemClickListener(this, item);
                        }
                        invalidate();
                    }
                }
                break;
        }
        return true;
    }

    @Override
    protected void onDraw(Canvas canvas) {
        super.onDraw(canvas);
        for (int i = 0; i < row; i++) {
            for (int j = 0; j < column; j++) {
                //Item显示的日
                int itemDay = i * column + j - todayWeek + 2;
                //默认选中今天日期
                if (selectPosition == null && day == itemDay) {
                    selectPosition = new int[]{i, j};
                }
                //初始化Item
                CalendarItem item = new CalendarItem();
                item.setSolarTextColor(Color.BLACK);
                item.setSolarTextSize(dpToPx(14F));
                item.setLunarTextColor(Color.GRAY);
                item.setLunarTextSize(dpToPx(10F));
                item.setSelectColor(Color.CYAN);
                item.setPosition(new int[]{i, j});
                item.setSelect(false);
                //如果选中位置不为空就设置选中Item
                if (selectPosition != null) {
                    item.setSelect(item.getPosition()[0] == selectPosition[0] && item.getPosition()[1] == selectPosition[1] ? true : false);
                }

                if (j < (todayWeek - 1) && i == 0 || itemDay > monthDayTotal) {//其他月份不显示
                    item.setSolarCalendarText("");
                    item.setLunarCalendarText("");
                } else {//本月份的日期
                    //设置农历日期
                    item.setLunarCalendarText(solarToLunar(itemDay));
                    //设置阳历日期
                    item.setSolarCalendarText(String.valueOf(itemDay));
                    //设置阳历坐标
                    item.setSolarX((2 * j + 1) * itemWidth / 2 - measureText(item.getSolarCalendarText()) / 2);
                    item.setSolarY((2 * i + 1) * itemHeight / 2 - measureText(item.getSolarCalendarText()) / item.getSolarCalendarText().length() / 2);
                    //设置农历坐标
                    item.setLunarX((2 * j + 1) * itemWidth / 2 - measureText(item.getLunarCalendarText()) / 3);
                    item.setLunarY((2 * i + 1) * itemHeight / 2 - measureText(item.getSolarCalendarText()) / item.getSolarCalendarText().length() + measureText(item.getLunarCalendarText()) / item.getLunarCalendarText().length());
                }
                //设置Item坐标范围
                item.setMinCoordinates(new float[]{item.getSolarX() - itemWidth / 2, item.getSolarY() - itemHeight / 2});
                item.setMaxCoordinates(new float[]{item.getSolarX() + itemWidth / 2, item.getSolarY() + itemHeight / 2});
                //绘制Item
                drawItem(canvas, item);
            }

        }

    }


    /**
     * 阳历天转农历天
     *
     * @param day
     * @return
     */
    private String solarToLunar(int day) {
        CalendarHelper.Solar solar = new CalendarHelper.Solar();
        solar.solarYear = year;
        solar.solarMonth = month;
        solar.solarDay = day;
        CalendarHelper.Lunar lunar = CalendarHelper.solarToLunar(solar);
        return CalendarHelper.solarToLunarDay(lunar.lunarDay);
    }

    /**
     * 测量字体大小
     *
     * @param text
     * @return
     */
    private float measureText(String text) {
        Paint paint = new Paint();
        paint.setTextSize(dpToPx(16));
        return paint.measureText(text);
    }

    /**
     * 绘制Item
     *
     * @param canvas 画布
     * @param item   item
     */
    private void drawItem(Canvas canvas, CalendarItem item) {
        items.add(item);
        //绘制圆形背景
        if (item.getLunarCalendarText().length() != 0 && item.isSelect()) {
            Paint paint = new Paint();
            paint.setColor(item.getSelectColor());
            canvas.drawCircle(item.getSolarX() + measureText(item.getSolarCalendarText()) / 2, item.getSolarY() + dpToPx(2F), itemBgRadius, paint);
        }
        drawText(canvas, item.getSolarX(), item.getSolarY(), item.getSolarCalendarText(), item.getSolarTextColor(), item.getSolarTextSize());
        drawText(canvas, item.getLunarX(), item.getLunarY(), item.getLunarCalendarText(), item.getLunarTextColor(), item.getLunarTextSize());
    }


    /**
     * 绘制文字
     *
     * @param canvas   画布
     * @param x        x坐标
     * @param y        y坐标
     * @param text     文字内容
     * @param color    文字颜色
     * @param textSize 文字大小
     */
    private float drawText(Canvas canvas, float x, float y, String text, int color, float textSize) {
        Paint paint = new Paint();
        paint.setColor(color);
        paint.setAntiAlias(true);
        paint.setTextSize(textSize);
        canvas.drawText(text, x, y, paint);
        return paint.measureText(text);
    }


    /**
     * Get the screen of density
     *
     * @return
     */
    public static float getScreenDensity() {
        return Resources.getSystem().getDisplayMetrics().density;
    }


    /**
     * dp to px
     *
     * @param dp
     * @return
     */
    public static float dpToPx(float dp) {
        return dp * getScreenDensity();
    }


    /**
     * Item点击事件
     */
    public OnItemClickListener listener;

    /**
     * 设置Item点击事件
     *
     * @param listener
     */
    public void setOnItemClickListener(OnItemClickListener listener) {
        this.listener = listener;
    }

    /**
     * 点击事件接口
     */
    public interface OnItemClickListener {
        void onItemClickListener(CalendarView calendarView, CalendarItem calendarItem);
    }


}