说明
本文可能需要一些基础知识点,如Canvas,Paint,Path,Rect等类的基本使用,建议不熟悉的同学可以学习GcsSloop安卓自定义View教程目录,会帮助很大。
上图就是github的提交表格,直观来看可以分为几个部分进行绘制:
(1)各个月份的小方格子,并且色彩根据提交次数变化,由浅到深
(2)右下边的颜色标志,我们右对齐就可以了
(3)左边的星期,原图是从周日画到周六,我们从周一画到周日
(4)上面的月份,我们只画出1-12月
(5)点击时候弹出当天的提交情况,由一个小三角和圆角矩形组成
需要解决的计算问题:
(1)生成任意一年的所有天,包含年月日周,提交次数,色块颜色,坐标
(1)一年中所有的小方格子坐标
(2)右下边颜色标志坐标
(3)左边星期坐标
(4)上面月份坐标
(5)点击弹出的提示框和文字坐标
生成某年所有天数
每天的信息我们需要封装成一个类,代码如下:
/** * Created by Administrator on 2017/1/13. * 封装每天的属性,方便在绘制的时候进行计算 */ public class Day implements Serializable{ /**年**/ public int year; /**月**/ public int month; /**日**/ public int date; /**周几**/ public int week; /**贡献次数,默认0**/ public int contribution = 0; /**默认颜色,根据提交次数改变**/ public int colour = 0xFFEEEEEE; /**方格坐标,左上点,右下点,确定矩形范围**/ public float startX; public float startY; public float endX; public float endY; @Override public String toString() { //这里直接在弹出框中显示 return ""+year+"年"+month+"月"+date+"日周"+week+","+contribution+"次"; } }
要想先绘制表格,需要计算出所有的天,这里计算一年中所有的天,我们通过从当年1月1日算起,到12月31日,因为星期是连续的,所以我们需要我们提供某年的1月1日是周几,比如2016年1月1日是周5,这里必要的参数是2016和周5,那么我们用一个类来实现该方法,代码如下:
public class DateFactory { /**平年map,对应月份和天数**/ private static HashMap<Integer,Integer> monthMap = new LinkedHashMap<>(12); /**闰年map,对应月份和天数**/ private static HashMap<Integer,Integer> leapMonthMap = new LinkedHashMap<>(12); static { //初始化map,只有2月份不同 monthMap.put(1,31);leapMonthMap.put(1,31); monthMap.put(2,28);leapMonthMap.put(2,29); monthMap.put(3,31);leapMonthMap.put(3,31); monthMap.put(4,30);leapMonthMap.put(4,30); monthMap.put(5,31);leapMonthMap.put(5,31); monthMap.put(6,30);leapMonthMap.put(6,30); monthMap.put(7,31);leapMonthMap.put(7,31); monthMap.put(8,31);leapMonthMap.put(8,31); monthMap.put(9,30);leapMonthMap.put(9,30); monthMap.put(10,31);leapMonthMap.put(10,31); monthMap.put(11,30);leapMonthMap.put(11,30); monthMap.put(12,31);leapMonthMap.put(12,31); } /** * 输入年份和1月1日是周几 * 闰年为366天,平年为365天 * @param year 年份 * @param weekday 该年1月1日为周几 * @return 该年1月1日到12月31日所有的天数 */ public static List<Day> getDays(int year, int weekday) { List<Day> days = new ArrayList<>(); boolean isLeapYear = isLeapYear(year); int dayNum = isLeapYear ? 366 : 365; Day day; int lastWeekday = weekday; for (int i = 1; i <= dayNum; i++) { day = new Day(); day.year = year; //计算当天为周几,如果大于7就重置1 day.week = lastWeekday<= 7 ? lastWeekday : 1; //计算当天为几月几号 int[] monthAndDay = getMonthAndDay(isLeapYear, i); day.month = monthAndDay[0]; day.date = monthAndDay[1]; //记录下昨天是周几并+1 lastWeekday = day.week; lastWeekday++; days.add(day); } checkDays(days); return days; } /** * 获取月和日 * @param isLeapYear 是否闰年 * @param currentDay 当前天数 * @return 包含月和天的数组 */ public static int[] getMonthAndDay(boolean isLeapYear,int currentDay) { HashMap<Integer,Integer> maps = isLeapYear?leapMonthMap:monthMap; Set<Map.Entry<Integer,Integer>> set = maps.entrySet(); int count = 0; Map.Entry<Integer, Integer> month = null; for (Map.Entry<Integer, Integer> entry : set) { count+=entry.getValue(); if (currentDay<=count){ month = entry; break; } } if (month == null){ throw new IllegalStateException("未找到所在的月份"); } int day = month.getValue()-(count-currentDay); return new int[]{month.getKey(),day}; } /** * 判断是闰年还是平年 * @param year 年份 * @return true 为闰年 */ public static boolean isLeapYear(int year) { return year % 4 == 0 && year % 100 != 0 || year % 400 == 0; } /** * 检测生成的天数是否正常 * @param days */ private static void checkDays(List<Day> days) { if (days == null) { throw new IllegalArgumentException("天数为空"); } if (days.size() != 365 && days.size() != 366) { throw new IllegalArgumentException("天数异常:" + days.size()); } } public static void main(String[] args){ //test List<Day> days = DateFactory.getDays(2016, 5); for (int i = 0; i < days.size(); i++) { System.out.println(days.get(i).toString()); } } }
具体的计算逻辑可以看看代码,不是很难,这样我们就能得到某年的所有天。
绘制天数格子
因为该view比较长,所以需要横屏显示,方便起见,这里我们也不再进行view的测量计算,也不再进行自定义属性,只关注其核心逻辑即可。
首先我们需要将需要的成员变量定义出来:
/**灰色方格的默认颜色**/ private final static int DEFAULT_BOX_COLOUR = 0xFFEEEEEE; /**提交次数颜色值**/ private final static int[] COLOUR_LEVEL = new int[]{0xFF1E6823, 0xFF44A340, 0xFF8CC665, 0xFFD6E685, DEFAULT_BOX_COLOUR}; /**星期**/ private String[] weeks = new String[]{"Mon", "Wed", "Fri", "Sun"}; /**月份**/ private String[] months = new String[]{"Jan", "Feb", "Mar", "Apr","May","Jun","Jul","Aug","Sep","Oct","Nov","Dec"}; /**默认的padding,绘制的时候不贴边画**/ private int padding = 24; /**小方格的默认边长**/ private int boxSide = 8; /**小方格间的默认间隔**/ private int boxInterval = 2; /**所有周的列数**/ private int column = 0; private List<Day> mDays;//一年中所有的天 private Paint boxPaint;//方格画笔 private Paint textPaint;//文字画笔 private Paint infoPaint;//弹出框画笔 private Paint.FontMetrics metrics;//测量文字 private float downX;//按下的点的X坐标 private float downY;//按下的点的Y坐标 private Day clickDay;//按下所对应的天
这些提取的变量是慢慢增加的,在自定义的时候一下想不全的时候可以先写,等用到某些变量的时候就提取出来。
然后我们初始化一下数据:
public GitHubContributionView(Context context, AttributeSet attrs, int defStyleAttr) { super(context, attrs, defStyleAttr); initView(); } public void initView() { mDays = DateFactory.getDays(2016, 5); //方格画笔 boxPaint = new Paint(); boxPaint.setStyle(Paint.Style.FILL); boxPaint.setStrokeWidth(2); boxPaint.setColor(DEFAULT_BOX_COLOUR); boxPaint.setAntiAlias(true); //文字画笔 textPaint = new Paint(); textPaint.setStyle(Paint.Style.FILL); textPaint.setColor(Color.GRAY); textPaint.setTextSize(12); textPaint.setAntiAlias(true); //弹出的方格信息画笔 infoPaint = new Paint(); infoPaint.setStyle(Paint.Style.FILL); infoPaint.setColor(0xCC888888); infoPaint.setTextSize(12); infoPaint.setAntiAlias(true); //将默认值转换px padding = UI.dp2px(getContext(), padding); boxSide = UI.dp2px(getContext(), boxSide); metrics = textPaint.getFontMetrics(); }
这里我们以2016年来举例,mDays就是获取2016年的所有天的集合(参数可以当作自定义属性提取出来),相关的Paint也已经初始化好了,接下来就需要在onDraw方法里画,先画所有的方格子和月份标志:
/** * 画出1-12月方格小块和上面的月份 * @param canvas 画布 */ private void drawBox(Canvas canvas) { //方格的左上右下坐标 float startX, startY, endX, endY; //起始月份为1月 int month = 1; for (int i = 0; i < mDays.size(); i++) { Day day = mDays.get(i); if (i == 0){ //画1月的文本标记,坐标应该是x=padding,y=padding-boxSide/2(间隙),y坐标在表格上面一点 canvas.drawText(months[0],padding,padding-boxSide/2,textPaint); } if (day.week == 1 && i != 0) { //如果当天是周1,那么说明增加了一列 column++; //如果列首的月份有变化,那么说明需要画月份 if (day.month>month){ month = day.month; //月份文本的坐标计算,x坐标在变化,而y坐标都是一样的,boxSide/2(间隙) canvas.drawText(months[month-1],padding+column*(boxSide+boxInterval),padding-boxSide/2,textPaint); } } //计算方格坐标点,x坐标随列数的增多而增加,y坐标随行数的增多而变化 startX = padding + column * (boxSide + boxInterval); startY = padding + (day.week - 1) * (boxSide + boxInterval); endX = startX + boxSide; endY = startY + boxSide; //将该方格的坐标保存下来,这样可以在点击方格的时候计算弹框的坐标 day.startX = startX; day.startY = startY; day.endX = endX; day.endY = endY; //给画笔设置当前天的颜色 boxPaint.setColor(day.colour); canvas.drawRect(startX, startY, endX, endY, boxPaint); } boxPaint.setColor(DEFAULT_BOX_COLOUR);//恢复默认颜色 }
这里主要是注意下行数列数的变化和月份坐标的计算,格子画好了。
绘制星期文本
我们再画左边的星期文本:
/** * 画左侧的星期 * @param canvas 画布 */ private void drawWeek(Canvas canvas) { //文字是左对齐,所以找出最长的字 float textLength = 0; for (String week : weeks) { float tempLength = textPaint.measureText(week); if (textLength < tempLength) { textLength = tempLength; } } //依次画出星期文本,坐标点x=padding-文本长度-文本和方格的间隙,y坐标随行数变化 canvas.drawText(weeks[0], padding - textLength - 2, padding + boxSide - metrics.descent, textPaint); canvas.drawText(weeks[1], padding - textLength - 2, padding + 3 * (boxSide + boxInterval) - metrics.descent, textPaint); canvas.drawText(weeks[2], padding - textLength - 2, padding + 5 * (boxSide + boxInterval) - metrics.descent, textPaint); canvas.drawText(weeks[3], padding - textLength - 2, padding + 7 * (boxSide + boxInterval) - metrics.descent, textPaint); }
绘制颜色深浅标志
然后根据表格的高度再画出右下边的颜色深浅标志:
/** * 画出右下角的颜色深浅标志,因为是右对齐的所以需要从右往左画 * @param canvas 画布 */ private void drawTag(Canvas canvas) { //首先计算出两个文本的长度 float moreLength = textPaint.measureText("More"); float lessLength = textPaint.measureText("Less"); //画 More 文本,x坐标=padding+(列数+1)*(方格边长+方格间隙)-一个方格间隙-文本长度 float moreX = padding + (column + 1) * (boxSide + boxInterval) - boxInterval - moreLength; //y坐标=padding+(方格行数+1,和表格底部有些距离)*(方格边长+方格间隙)+字体的ascent高度 float moreY = padding + 8 * (boxSide + boxInterval) + Math.abs(metrics.ascent); canvas.drawText("More", moreX, moreY, textPaint); //画深浅色块,坐标根据上面的More依次计算就可以了 float interval = boxSide - 2;//文字和色块间的距离 float leftX = moreX - interval - boxSide; float topY = moreY - boxSide; float rightX = moreX - interval; float bottomY = moreY;//色块的Y坐标是一样的 for (int i = 0; i < COLOUR_LEVEL.length; i++) { boxPaint.setColor(COLOUR_LEVEL[i]); canvas.drawRect(leftX - i * (boxSide + boxInterval), topY, rightX - i * (boxSide + boxInterval), bottomY, boxPaint); } //最后画 Less 文本,原理同上 canvas.drawText("Less", leftX - 4 * (boxSide + boxInterval) - interval - lessLength, moreY, textPaint); }
这样整个表格主体绘制完成。
处理点击事件
接下来要处理点击事件,判断点击的坐标如果在方格内,那么弹出对于的文本框,先处理点击事件:
@Override public boolean onTouchEvent(MotionEvent event) { //获取ACTION_DOWN的坐标,用来判断点在哪天,并弹出· if (MotionEvent.ACTION_DOWN == event.getAction()) { downX = event.getX(); downY = event.getY(); findClickBox(); } //这里因为我们只是记录坐标点,不对事件进行拦截所以默认返回 return super.onTouchEvent(event); }
判断是否在方格内:
/** * 判断是否点击在方格内 */ private void findClickBox() { for (Day day : mDays) { //检测点击的坐标如果在方格内,则弹出信息提示 if (downX >= day.startX && downX <= day.endX && downY >= day.startY && downY <= day.endY) { clickDay = day;//纪录点击的哪天 break; } } //点击完要刷新,这样每次点击不同的方格,弹窗就可以在相应的位置显示 refreshView(); } /** * 点击弹出文字提示 */ private void refreshView() { invalidate(); }
绘制弹出文本框
然后看看弹出文本框的绘制:
/** * 画方格上的文字弹框 * @param canvas 画布 */ private void drawPopupInfo(Canvas canvas) { if (clickDay != null) {//点击的天不为null时候才画 //先根据方格来画出一个小三角形,坐标就是方格的中间 Path infoPath = new Path(); //先从方格中心 infoPath.moveTo(clickDay.startX + boxSide / 2, clickDay.startY + boxSide / 2); //然后是方格的左上点 infoPath.lineTo(clickDay.startX, clickDay.startY); //然后是方格的右上点 infoPath.lineTo(clickDay.endX, clickDay.startY); //画出三角 canvas.drawPath(infoPath,infoPaint); //画三角上的圆角矩形 textPaint.setColor(Color.WHITE); //得到当天的文本信息 String popupInfo = clickDay.toString(); System.out.println(popupInfo); //计算文本的高度和长度用以确定矩形的大小 float infoHeight = metrics.descent - metrics.ascent; float infoLength = textPaint.measureText(popupInfo); Log.e("height",infoHeight+""); Log.e("length",infoLength+""); //矩形左上点应该是x=当前天的x+边长/2-(文本长度/2+文本和框的间隙) float leftX = (clickDay.startX + boxSide / 2 ) - (infoLength / 2 + boxSide); //矩形左上点应该是y=当前天的y+边长/2-(文本高度+上下文本和框的间隙) float topY = clickDay.startY-(infoHeight+2*boxSide); //矩形的右下点应该是x=leftX+文本长度+文字两边和矩形的间距 float rightX = leftX+infoLength+2*boxSide; //矩形的右下点应该是y=当前天的y float bottomY = clickDay.startY; System.out.println(""+leftX+"/"+topY+"/"+rightX+"/"+bottomY); RectF rectF = new RectF(leftX, topY, rightX, bottomY); canvas.drawRoundRect(rectF,4,4,infoPaint); //绘制文字,x=leftX+文字和矩形间距,y=topY+文字和矩形上面间距+文字顶到基线高度 canvas.drawText(popupInfo,leftX+boxSide,topY+boxSide+Math.abs(metrics.ascent),textPaint); clickDay = null;//重新置空,保证点击方格外信息消失 textPaint.setColor(Color.GRAY);//恢复画笔颜色 } }
这样主体逻辑完成,但需要开放设置某天提交次数的方法:
/** * 设置某天的次数 * @param year 年 * @param month 月 * @param day 日 * @param contribution 次数 */ public void setData(int year,int month,int day,int contribution){ //先找到是第几天,为了方便不做参数检测了 for (Day d : mDays) { if (d.year == year && d.month == month && d.date == day){ d.contribution = contribution; d.colour = getColour(contribution); break; } } refreshView(); } /** * 根据提交次数来获取颜色值 * @param contribution 提交的次数 * @return 颜色值 */ private int getColour(int contribution){ int colour = 0; if (contribution <= 0){ colour = COLOUR_LEVEL[4]; } if (contribution == 1){ colour = COLOUR_LEVEL[3]; } if (contribution == 2){ colour = COLOUR_LEVEL[2]; } if (contribution == 3){ colour = COLOUR_LEVEL[1]; } if (contribution >= 4){ colour = COLOUR_LEVEL[0]; } return colour; }
好了,所有逻辑完成,主要涉及到一些计算,完整代码:
/** * Created by Administrator on 2017/1/13. * 仿GitHub的提交活跃表 * 横屏使用 */ public class GitHubContributionView extends View { /**灰色方格的默认颜色**/ private final static int DEFAULT_BOX_COLOUR = 0xFFEEEEEE; /**提交次数颜色值**/ private final static int[] COLOUR_LEVEL = new int[]{0xFF1E6823, 0xFF44A340, 0xFF8CC665, 0xFFD6E685, DEFAULT_BOX_COLOUR}; /**星期**/ private String[] weeks = new String[]{"Mon", "Wed", "Fri", "Sun"}; /**月份**/ private String[] months = new String[]{"Jan", "Feb", "Mar", "Apr","May","Jun","Jul","Aug","Sep","Oct","Nov","Dec"}; /**默认的padding,绘制的时候不贴边画**/ private int padding = 24; /**小方格的默认边长**/ private int boxSide = 8; /**小方格间的默认间隔**/ private int boxInterval = 2; /**所有周的列数**/ private int column = 0; private List<Day> mDays;//一年中所有的天 private Paint boxPaint;//方格画笔 private Paint textPaint;//文字画笔 private Paint infoPaint;//弹出框画笔 private Paint.FontMetrics metrics;//测量文字 private float downX;//按下的点的X坐标 private float downY;//按下的点的Y坐标 private Day clickDay;//按下所对应的天 public GitHubContributionView(Context context) { this(context, null); } public GitHubContributionView(Context context, AttributeSet attrs) { this(context, attrs, 0); } public GitHubContributionView(Context context, AttributeSet attrs, int defStyleAttr) { super(context, attrs, defStyleAttr); initView(); } public void initView() { mDays = DateFactory.getDays(2016, 5); //方格画笔 boxPaint = new Paint(); boxPaint.setStyle(Paint.Style.FILL); boxPaint.setStrokeWidth(2); boxPaint.setColor(DEFAULT_BOX_COLOUR); boxPaint.setAntiAlias(true); //文字画笔 textPaint = new Paint(); textPaint.setStyle(Paint.Style.FILL); textPaint.setColor(Color.GRAY); textPaint.setTextSize(12); textPaint.setAntiAlias(true); //弹出的方格信息画笔 infoPaint = new Paint(); infoPaint.setStyle(Paint.Style.FILL); infoPaint.setColor(0xCC888888); infoPaint.setTextSize(12); infoPaint.setAntiAlias(true); //将默认值转换px padding = UI.dp2px(getContext(), padding); boxSide = UI.dp2px(getContext(), boxSide); metrics = textPaint.getFontMetrics(); } @Override protected void onSizeChanged(int w, int h, int oldw, int oldh) { super.onSizeChanged(w, h, oldw, oldh); } @Override protected void onDraw(Canvas canvas) { super.onDraw(canvas); column = 0; canvas.save(); drawBox(canvas); drawWeek(canvas); drawTag(canvas); drawPopupInfo(canvas); canvas.restore(); } /** * 画出1-12月方格小块和上面的月份 * @param canvas 画布 */ private void drawBox(Canvas canvas) { //方格的左上右下坐标 float startX, startY, endX, endY; //起始月份为1月 int month = 1; for (int i = 0; i < mDays.size(); i++) { Day day = mDays.get(i); if (i == 0){ //画1月的文本标记,坐标应该是x=padding,y=padding-boxSide/2(间隙),y坐标在表格上面一点 canvas.drawText(months[0],padding,padding-boxSide/2,textPaint); } if (day.week == 1 && i != 0) { //如果当天是周1,那么说明增加了一列 column++; //如果列首的月份有变化,那么说明需要画月份 if (day.month>month){ month = day.month; //月份文本的坐标计算,x坐标在变化,而y坐标都是一样的,boxSide/2(间隙) canvas.drawText(months[month-1],padding+column*(boxSide+boxInterval),padding-boxSide/2,textPaint); } } //计算方格坐标点,x坐标一致随列数的增多而增加,y坐标随行数的增多而变化 startX = padding + column * (boxSide + boxInterval); startY = padding + (day.week - 1) * (boxSide + boxInterval); endX = startX + boxSide; endY = startY + boxSide; //将该方格的坐标保存下来,这样可以在点击方格的时候计算弹框的坐标 day.startX = startX; day.startY = startY; day.endX = endX; day.endY = endY; //给画笔设置当前天的颜色 boxPaint.setColor(day.colour); canvas.drawRect(startX, startY, endX, endY, boxPaint); } boxPaint.setColor(DEFAULT_BOX_COLOUR);//恢复默认颜色 } /** * 画左侧的星期 * @param canvas 画布 */ private void drawWeek(Canvas canvas) { //文字是左对齐,所以找出最长的字 float textLength = 0; for (String week : weeks) { float tempLength = textPaint.measureText(week); if (textLength < tempLength) { textLength = tempLength; } } //依次画出星期文本,坐标点x=padding-文本长度-文本和方格的间隙,y坐标随行数变化 canvas.drawText(weeks[0], padding - textLength - 2, padding + boxSide - metrics.descent, textPaint); canvas.drawText(weeks[1], padding - textLength - 2, padding + 3 * (boxSide + boxInterval) - metrics.descent, textPaint); canvas.drawText(weeks[2], padding - textLength - 2, padding + 5 * (boxSide + boxInterval) - metrics.descent, textPaint); canvas.drawText(weeks[3], padding - textLength - 2, padding + 7 * (boxSide + boxInterval) - metrics.descent, textPaint); } /** * 画出右下角的颜色深浅标志,因为是右对齐的所以需要从右往左画 * @param canvas 画布 */ private void drawTag(Canvas canvas) { //首先计算出两个文本的长度 float moreLength = textPaint.measureText("More"); float lessLength = textPaint.measureText("Less"); //画 More 文本,x坐标=padding+(列数+1)*(方格边长+方格间隙)-一个方格间隙-文本长度 float moreX = padding + (column + 1) * (boxSide + boxInterval) - boxInterval - moreLength; //y坐标=padding+(方格行数+1,和表格底部有些距离)*(方格边长+方格间隙)+字体的ascent高度 float moreY = padding + 8 * (boxSide + boxInterval) + Math.abs(metrics.ascent); canvas.drawText("More", moreX, moreY, textPaint); //画深浅色块,坐标根据上面的More依次计算就可以了 float interval = boxSide - 2;//文字和色块间的距离 float leftX = moreX - interval - boxSide; float topY = moreY - boxSide; float rightX = moreX - interval; float bottomY = moreY;//色块的Y坐标是一样的 for (int i = 0; i < COLOUR_LEVEL.length; i++) { boxPaint.setColor(COLOUR_LEVEL[i]); canvas.drawRect(leftX - i * (boxSide + boxInterval), topY, rightX - i * (boxSide + boxInterval), bottomY, boxPaint); } //最后画 Less 文本,原理同上 canvas.drawText("Less", leftX - 4 * (boxSide + boxInterval) - interval - lessLength, moreY, textPaint); } @Override public boolean onTouchEvent(MotionEvent event) { //获取点击时候的坐标,用来判断点在哪天,并弹出· if (MotionEvent.ACTION_DOWN == event.getAction()) { downX = event.getX(); downY = event.getY(); findClickBox(); } return super.onTouchEvent(event); } /** * 判断是否点击在方格内 */ private void findClickBox() { for (Day day : mDays) { //检测点击的坐标如果在方格内,则弹出信息提示 if (downX >= day.startX && downX <= day.endX && downY >= day.startY && downY <= day.endY) { clickDay = day;//纪录点击的哪天 break; } } //点击完要刷新,这样每次点击不同的方格,弹窗就可以在相应的位置显示 refreshView(); } /** * 点击弹出文字提示 */ private void refreshView() { invalidate(); } /** * 画方格上的文字弹框 * @param canvas 画布 */ private void drawPopupInfo(Canvas canvas) { if (clickDay != null) { //先根据方格来画出一个小三角形,坐标就是方格的中间 Path infoPath = new Path(); //先从方格中心 infoPath.moveTo(clickDay.startX + boxSide / 2, clickDay.startY + boxSide / 2); //然后是方格的左上点 infoPath.lineTo(clickDay.startX, clickDay.startY); //然后是方格的右上点 infoPath.lineTo(clickDay.endX, clickDay.startY); //画出三角 canvas.drawPath(infoPath,infoPaint); //画三角上的圆角矩形 textPaint.setColor(Color.WHITE); //得到当天的文本信息 String popupInfo = clickDay.toString(); System.out.println(popupInfo); //计算文本的高度和长度用以确定矩形的大小 float infoHeight = metrics.descent - metrics.ascent; float infoLength = textPaint.measureText(popupInfo); Log.e("height",infoHeight+""); Log.e("length",infoLength+""); //矩形左上点应该是x=当前天的x+边长/2-(文本长度/2+文本和框的间隙) float leftX = (clickDay.startX + boxSide / 2 ) - (infoLength / 2 + boxSide); //矩形左上点应该是y=当前天的y+边长/2-(文本高度+上下文本和框的间隙) float topY = clickDay.startY-(infoHeight+2*boxSide); //矩形的右下点应该是x=leftX+文本长度+文字两边和矩形的间距 float rightX = leftX+infoLength+2*boxSide; //矩形的右下点应该是y=当前天的y float bottomY = clickDay.startY; System.out.println(""+leftX+"/"+topY+"/"+rightX+"/"+bottomY); RectF rectF = new RectF(leftX, topY, rightX, bottomY); canvas.drawRoundRect(rectF,4,4,infoPaint); //绘制文字,x=leftX+文字和矩形间距,y=topY+文字和矩形上面间距+文字顶到基线高度 canvas.drawText(popupInfo,leftX+boxSide,topY+boxSide+Math.abs(metrics.ascent),textPaint); clickDay = null;//重新置空,保证点击方格外信息消失 textPaint.setColor(Color.GRAY);//恢复画笔颜色 } } /** * 设置某天的次数 * @param year 年 * @param month 月 * @param day 日 * @param contribution 次数 */ public void setData(int year,int month,int day,int contribution){ //先找到是第几天,为了方便不做参数检测了 for (Day d : mDays) { if (d.year == year && d.month == month && d.date == day){ d.contribution = contribution; d.colour = getColour(contribution); break; } } refreshView(); } /** * 根据提交次数来获取颜色值 * @param contribution 提交的次数 * @return 颜色值 */ private int getColour(int contribution){ int colour = 0; if (contribution <= 0){ colour = COLOUR_LEVEL[4]; } if (contribution == 1){ colour = COLOUR_LEVEL[3]; } if (contribution == 2){ colour = COLOUR_LEVEL[2]; } if (contribution == 3){ colour = COLOUR_LEVEL[1]; } if (contribution >= 4){ colour = COLOUR_LEVEL[0]; } return colour; } }
这样弄个布局测试下:
<?xml version="1.0" encoding="utf-8"?> <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="match_parent" android:layout_height="match_parent" android:gravity="center" android:orientation="vertical" > <com.franky.custom.view.GitHubContributionView android:id="@+id/cc_chart" android:layout_width="match_parent" android:layout_height="match_parent" /> </LinearLayout>
随机弄些数据:
public class MainActivity extends AppCompatActivity { @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); GitHubContributionView github = (GitHubContributionView) findViewById(R.id.cc_chart); github.setData(2016,12,9,2); github.setData(2016,11,9,1); github.setData(2016,10,5,10); github.setData(2016,8,9,3); github.setData(2016,4,20,2); github.setData(2016,12,13,3); github.setData(2016,12,14,3); github.setData(2016,2,15,4); } }
效果
gif没有录好,看看图片效果:
查看源码
以上所述是小编给大家介绍的Android自定义View实现仿GitHub的提交活跃表格,希望对大家有所帮助,如果大家有任何疑问请给我留言,小编会及时回复大家的。在此也非常感谢大家对找一找教程网网站的支持!