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Android自定义View实现仿GitHub的提交活跃表格

2019-12-12 03:59:49
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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。

github.jpg

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:

效果.png

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武林网网站的支持!

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