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android 日历控件第二季

2015-12-31  本文已影响2031人  郑鸿翊

前言:最近一直做项目,遇到许多问题,其中令我很不爽的是:项目需求要求的日历控件一定要仿苹果!!!安卓本身提供的TimePicker是年月日分开滚动的,这不行呀,一定得一起滚,这让我挺大地感慨当前安卓开发很难真正做出android的风格出来,不是技术问题而是需求问题。还好,第二个项目对日历控件的要求没那么严格了,但是我百度了一下,开源的日历控件很少有符合心意的(可能是我没找到,有的话请留言我~),所以就根据之前的日历控件再做改进,回头看去,之前的我还是太年轻了。

总结之前的缺陷:

于是,第二季来了


整体效果 hohoooo

这其实是两个部分的结合,上部分显示年月和按钮的是一个LinearLayout,下面的日历才是真正的主角。

这一期的重点

考虑到之前绘制了年月和切换上下月的按钮,感觉不太灵活,于是单独将日历页拿出来,这样就可以运用到很多地方了。只要结合多其他的控件,即可以做出想要的效果。

思路部分:

方法部分:

代码部分:

@Override
    protected void onDraw(Canvas canvas) {
        // TODO Auto-generated method stub
        super.onDraw(canvas);
        Log.d(TAG, "mViewWidth=" + mViewWidth);
        Log.d(TAG, "mViewHeight=" + mViewHeight);
        canvas.drawColor(calendarBg);

        int hang_num = 8;
        int lie_num = 7;

        xInterval = mViewWidth / lie_num;
        yInterval = mViewHeight / hang_num;
        
        //背景圆的半径
        mBgRadius = (int) (Math.min(xInterval, yInterval) / 2);
        
        mWeekTextSize = Math.min(mViewHeight, mViewWidth) / 15;
        mDayTextsize = Math.min(mViewHeight, mViewWidth) / 15;

        float x = 0;
        float y = 0;
        float offset = 0;
        mPaint.reset();

        drawWeekText(canvas);

        drawDay(canvas);

    }
/**
     * 绘制周
     * 
     * @param canvas
     */
    private void drawWeekText(Canvas canvas) {
        float x, y;
        float offset;
        
        //注意,这里要先设置TextSize,后面用Paint测量String长度才会准,这样绘制文字才会准
        mPaint.setTextSize(mWeekTextSize);
        // 绘制一周
        for (int i = 0; i < weekName.length; i++) {
            x = i * xInterval + xInterval / 2;
            // 因为绘制在第一行
            y = 1 * yInterval;

            offset = mPaint.measureText(weekName[i]);
            if (i == 0 || i == weekName.length - 1) {
                mPaint.setColor(mWeekTextColor);
                mPaint.setAntiAlias(true);
                canvas.drawText(weekName[i], x - offset / 2, y, mPaint);
            } else {
                mPaint.setColor(mWeekTextColor);
                mPaint.setAntiAlias(true);
                canvas.drawText(weekName[i], x - offset / 2, y, mPaint);
            }
        }
        mPaint.reset();
    }

绘制的方法也做了修改,让字体的绘制更加精准

/**
     * 绘制天
     * 
     * @param canvas
     */
    private void drawDay(Canvas canvas) {
        mPaint.setTextSize(mDayTextsize);
        mPaint.setAntiAlias(true);
        int day = 0;
        int theday;
        boolean istoday = false;
        boolean isCheckDay = false;
        float offset = 0;

        float x, y;
        // 绘制的日期
        String str;
        for (int i = 2; i < 8; i++) {
            for (int j = 0; j < 7; j++) {

                if (i == 2 && j == 0) {
                    j = weekOfFirstDay;
                }
                if (day > allDays.length - 1) {
                    theday = -1;
                } else {
                    theday = allDays[day];
                }

                if (theday < 10) {
                    str = "0" + theday;
                } else {
                    str = "" + theday;
                }
                if (theday == -1) {
                    str = "";
                }
                offset = mPaint.measureText(str);
                x = j * xInterval + xInterval / 2;
                // 因为绘制在第一行
                y = i * yInterval;

                drawDayText(x, y, str, mNormalTextColor, isToday(theday), isTheday(theday, month, year),
                        isOverdue(theday, month, year), canvas, offset);
                day++;
            }
        }

    }

很多代码跟之前的是重复的,不贴太多。
主要一个贴出CalendarUtils这个工具类,帮助更多人

package tools;

import java.util.Calendar;

import android.util.Log;

public class CalendarUtils {

    private static Calendar calendar = Calendar.getInstance();
    private static int theDay = calendar.get(Calendar.DAY_OF_MONTH);
    private static int theMonth = calendar.get(Calendar.MONTH) + 1;
    private static int theYear = calendar.get(Calendar.YEAR);

    public static void reset() {

        calendar.set(theYear, theMonth - 1, theDay);
        printCalendar();
    }
    
    public static Calendar getCanlendar(){
        return calendar;
    }

    public static int getToday() {
        return theDay;
    }

    public static int getTomonth() {
        return theMonth;
    }

    public static int getToyear() {
        return theYear;
    }

    public static int getCurrentYear() {
        return calendar.get(Calendar.YEAR);
    }

    public static int getCurrentMonth() {
        return calendar.get(Calendar.MONTH) + 1;
    }

    public static int getCurrentDate() {
        return calendar.get(Calendar.DATE);
    }

    public static int getCurrentMaxNumOfMonth() {
        return calendar.getActualMaximum(Calendar.DAY_OF_MONTH);
    }

    public static int getCurrentFirstWeekdayOfMoth() {
        int today = getCurrentDate();
        calendar.set(Calendar.DATE, 1);
        int weekday = calendar.get(Calendar.DAY_OF_WEEK) - 1;
        calendar.set(Calendar.DATE, today);
        return weekday;
    }

    public static void nextMonth() {
        calendar.add(Calendar.MONTH, 1);
    }

    public static void preMonth() {
        calendar.add(Calendar.MONTH, -1);
    }

    public static void printCalendar() {
        Log.d("CalendarUtils", getCurrentYear() + "年" + getCurrentMonth() + "月" + getCurrentDate() + "日");
        // System.out.println(getCurrentYear() + "年" + getCurrentMonth() + "月" +
        // getCurrentDate() + "日");
        // System.out.println("总共有" + getCurrentMaxNumOfMonth() + "天" + "第一天是星期"
        // + getCurrentFirstWeekdayOfMoth());
    }

    public static String getNextDay(int year, int month, int day) {
        calendar.set(year, month - 1, day + 1);
        int currentYear = getCurrentYear();
        int currentMonth = getCurrentMonth();
        int currentDate = getCurrentDate();
        reset();
        return currentYear + "-" + currentMonth + "-" + currentDate;
    }

    public static String getPreDay(int year, int month, int day) {
        calendar.set(year, month - 1, day - 1);
        int currentYear = getCurrentYear();
        int currentMonth = getCurrentMonth();
        int currentDate = getCurrentDate();
        reset();
        return currentYear + "-" + currentMonth + "-" + currentDate;
    }

    /**
     * O 日 距离  T 日 的天数
     * @param yearo
     * @param montho
     * @param dayo
     * @param yeart
     * @param montht
     * @param dayt
     * @return
     */
    public static int getGapCount(int yearo, int montho, int dayo, int yeart, int montht, int dayt) {
        int oldYear = getCurrentYear();
        int oldMonth = getCurrentMonth();
        int oldDay = getCurrentDate();
        
        calendar.set(yearo, montho, dayo, 0, 0, 0);
        long time1 = calendar.getTime().getTime();
        
        calendar.set(yeart, montht, dayt, 0, 0, 0);
        long time2 = calendar.getTime().getTime();
        
        calendar.set(oldYear, oldMonth-1 , oldDay);
        
        return (int) ((time1-time2) / (1000 * 60 * 60 * 24));
    }
    
    public static boolean isPreDay( int year, int month, int day){
        if(getGapCount(year,month,day,theYear,theMonth,theDay)<0){
            return true;
        }else{
            return false;
        }
    }

    public static void set(int year, int month, int day) {
        // TODO Auto-generated method stub
        calendar.set(year, month, day);
    }

}

其实,回头一看,这个日历控件好像不怎么高大上了。。。

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