編輯:關於Android編程
說明
本文可能需要一些基礎知識點,如Canvas,Paint,Path,Rect等類的基本使用,建議不熟悉的同學可以學習GcsSloop安卓自定義View教程目錄,會幫助很大。
上圖就是github的提交表格,直觀來看可以分為幾個部分進行繪制:
(1)各個月份的小方格子,並且色彩根據提交次數變化,由淺到深
(2)右下邊的顏色標志,我們右對齊就可以了
(3)左邊的星期,原圖是從周日畫到周六,我們從周一畫到周日
(4)上面的月份,我們只畫出1-12月
(5)點擊時候彈出當天的提交情況,由一個小三角和圓角矩形組成
需要解決的計算問題:
(1)生成任意一年的所有天,包含年月日周,提交次數,色塊顏色,坐標
(1)一年中所有的小方格子坐標
(2)右下邊顏色標志坐標
(3)左邊星期坐標
(4)上面月份坐標
(5)點擊彈出的提示框和文字坐標
生成某年所有天數
每天的信息我們需要封裝成一個類,代碼如下:
/** * Created by Administrator on 2017/1/13. * 封裝每天的屬性,方便在繪制的時候進行計算 */ public class Day implements Serializable{ /**年**/ public int year; /**月**/ public int month; /**日**/ public int date; /**周幾**/ public int week; /**貢獻次數,默認0**/ public int contribution = 0; /**默認顏色,根據提交次數改變**/ public int colour = 0xFFEEEEEE; /**方格坐標,左上點,右下點,確定矩形范圍**/ public float startX; public float startY; public float endX; public float endY; @Override public String toString() { //這裡直接在彈出框中顯示 return ""+year+"年"+month+"月"+date+"日周"+week+","+contribution+"次"; } }
要想先繪制表格,需要計算出所有的天,這裡計算一年中所有的天,我們通過從當年1月1日算起,到12月31日,因為星期是連續的,所以我們需要我們提供某年的1月1日是周幾,比如2016年1月1日是周5,這裡必要的參數是2016和周5,那麼我們用一個類來實現該方法,代碼如下:
public class DateFactory { /**平年map,對應月份和天數**/ private static HashMap<Integer,Integer> monthMap = new LinkedHashMap<>(12); /**閏年map,對應月份和天數**/ 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); } /** * 輸入年份和1月1日是周幾 * 閏年為366天,平年為365天 * @param year 年份 * @param weekday 該年1月1日為周幾 * @return 該年1月1日到12月31日所有的天數 */ 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; //計算當天為周幾,如果大於7就重置1 day.week = lastWeekday<= 7 ? lastWeekday : 1; //計算當天為幾月幾號 int[] monthAndDay = getMonthAndDay(isLeapYear, i); day.month = monthAndDay[0]; day.date = monthAndDay[1]; //記錄下昨天是周幾並+1 lastWeekday = day.week; lastWeekday++; days.add(day); } checkDays(days); return days; } /** * 獲取月和日 * @param isLeapYear 是否閏年 * @param currentDay 當前天數 * @return 包含月和天的數組 */ 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}; } /** * 判斷是閏年還是平年 * @param year 年份 * @return true 為閏年 */ public static boolean isLeapYear(int year) { return year % 4 == 0 && year % 100 != 0 || year % 400 == 0; } /** * 檢測生成的天數是否正常 * @param days */ private static void checkDays(List<Day> days) { if (days == null) { throw new IllegalArgumentException("天數為空"); } if (days.size() != 365 && days.size() != 366) { throw new IllegalArgumentException("天數異常:" + 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()); } } }
具體的計算邏輯可以看看代碼,不是很難,這樣我們就能得到某年的所有天。
繪制天數格子
因為該view比較長,所以需要橫屏顯示,方便起見,這裡我們也不再進行view的測量計算,也不再進行自定義屬性,只關注其核心邏輯即可。
首先我們需要將需要的成員變量定義出來:
/**灰色方格的默認顏色**/ private final static int DEFAULT_BOX_COLOUR = 0xFFEEEEEE; /**提交次數顏色值**/ 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"}; /**默認的padding,繪制的時候不貼邊畫**/ private int padding = 24; /**小方格的默認邊長**/ private int boxSide = 8; /**小方格間的默認間隔**/ private int boxInterval = 2; /**所有周的列數**/ private int column = 0; private List<Day> mDays;//一年中所有的天 private Paint boxPaint;//方格畫筆 private Paint textPaint;//文字畫筆 private Paint infoPaint;//彈出框畫筆 private Paint.FontMetrics metrics;//測量文字 private float downX;//按下的點的X坐標 private float downY;//按下的點的Y坐標 private Day clickDay;//按下所對應的天
這些提取的變量是慢慢增加的,在自定義的時候一下想不全的時候可以先寫,等用到某些變量的時候就提取出來。
然後我們初始化一下數據:
public GitHubContributionView(Context context, AttributeSet attrs, int defStyleAttr) { super(context, attrs, defStyleAttr); initView(); } public void initView() { mDays = DateFactory.getDays(2016, 5); //方格畫筆 boxPaint = new Paint(); boxPaint.setStyle(Paint.Style.FILL); boxPaint.setStrokeWidth(2); boxPaint.setColor(DEFAULT_BOX_COLOUR); boxPaint.setAntiAlias(true); //文字畫筆 textPaint = new Paint(); textPaint.setStyle(Paint.Style.FILL); textPaint.setColor(Color.GRAY); textPaint.setTextSize(12); textPaint.setAntiAlias(true); //彈出的方格信息畫筆 infoPaint = new Paint(); infoPaint.setStyle(Paint.Style.FILL); infoPaint.setColor(0xCC888888); infoPaint.setTextSize(12); infoPaint.setAntiAlias(true); //將默認值轉換px padding = UI.dp2px(getContext(), padding); boxSide = UI.dp2px(getContext(), boxSide); metrics = textPaint.getFontMetrics(); }
這裡我們以2016年來舉例,mDays就是獲取2016年的所有天的集合(參數可以當作自定義屬性提取出來),相關的Paint也已經初始化好了,接下來就需要在onDraw方法裡畫,先畫所有的方格子和月份標志:
/** * 畫出1-12月方格小塊和上面的月份 * @param canvas 畫布 */ private void drawBox(Canvas canvas) { //方格的左上右下坐標 float startX, startY, endX, endY; //起始月份為1月 int month = 1; for (int i = 0; i < mDays.size(); i++) { Day day = mDays.get(i); if (i == 0){ //畫1月的文本標記,坐標應該是x=padding,y=padding-boxSide/2(間隙),y坐標在表格上面一點 canvas.drawText(months[0],padding,padding-boxSide/2,textPaint); } if (day.week == 1 && i != 0) { //如果當天是周1,那麼說明增加了一列 column++; //如果列首的月份有變化,那麼說明需要畫月份 if (day.month>month){ month = day.month; //月份文本的坐標計算,x坐標在變化,而y坐標都是一樣的,boxSide/2(間隙) canvas.drawText(months[month-1],padding+column*(boxSide+boxInterval),padding-boxSide/2,textPaint); } } //計算方格坐標點,x坐標隨列數的增多而增加,y坐標隨行數的增多而變化 startX = padding + column * (boxSide + boxInterval); startY = padding + (day.week - 1) * (boxSide + boxInterval); endX = startX + boxSide; endY = startY + boxSide; //將該方格的坐標保存下來,這樣可以在點擊方格的時候計算彈框的坐標 day.startX = startX; day.startY = startY; day.endX = endX; day.endY = endY; //給畫筆設置當前天的顏色 boxPaint.setColor(day.colour); canvas.drawRect(startX, startY, endX, endY, boxPaint); } boxPaint.setColor(DEFAULT_BOX_COLOUR);//恢復默認顏色 }
這裡主要是注意下行數列數的變化和月份坐標的計算,格子畫好了。
繪制星期文本
我們再畫左邊的星期文本:
/** * 畫左側的星期 * @param canvas 畫布 */ private void drawWeek(Canvas canvas) { //文字是左對齊,所以找出最長的字 float textLength = 0; for (String week : weeks) { float tempLength = textPaint.measureText(week); if (textLength < tempLength) { textLength = tempLength; } } //依次畫出星期文本,坐標點x=padding-文本長度-文本和方格的間隙,y坐標隨行數變化 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); }
繪制顏色深淺標志
然後根據表格的高度再畫出右下邊的顏色深淺標志:
/** * 畫出右下角的顏色深淺標志,因為是右對齊的所以需要從右往左畫 * @param canvas 畫布 */ private void drawTag(Canvas canvas) { //首先計算出兩個文本的長度 float moreLength = textPaint.measureText("More"); float lessLength = textPaint.measureText("Less"); //畫 More 文本,x坐標=padding+(列數+1)*(方格邊長+方格間隙)-一個方格間隙-文本長度 float moreX = padding + (column + 1) * (boxSide + boxInterval) - boxInterval - moreLength; //y坐標=padding+(方格行數+1,和表格底部有些距離)*(方格邊長+方格間隙)+字體的ascent高度 float moreY = padding + 8 * (boxSide + boxInterval) + Math.abs(metrics.ascent); canvas.drawText("More", moreX, moreY, textPaint); //畫深淺色塊,坐標根據上面的More依次計算就可以了 float interval = boxSide - 2;//文字和色塊間的距離 float leftX = moreX - interval - boxSide; float topY = moreY - boxSide; float rightX = moreX - interval; float bottomY = moreY;//色塊的Y坐標是一樣的 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); } //最後畫 Less 文本,原理同上 canvas.drawText("Less", leftX - 4 * (boxSide + boxInterval) - interval - lessLength, moreY, textPaint); }
這樣整個表格主體繪制完成。
處理點擊事件
接下來要處理點擊事件,判斷點擊的坐標如果在方格內,那麼彈出對於的文本框,先處理點擊事件:
@Override public boolean onTouchEvent(MotionEvent event) { //獲取ACTION_DOWN的坐標,用來判斷點在哪天,並彈出· if (MotionEvent.ACTION_DOWN == event.getAction()) { downX = event.getX(); downY = event.getY(); findClickBox(); } //這裡因為我們只是記錄坐標點,不對事件進行攔截所以默認返回 return super.onTouchEvent(event); }
判斷是否在方格內:
/** * 判斷是否點擊在方格內 */ private void findClickBox() { for (Day day : mDays) { //檢測點擊的坐標如果在方格內,則彈出信息提示 if (downX >= day.startX && downX <= day.endX && downY >= day.startY && downY <= day.endY) { clickDay = day;//紀錄點擊的哪天 break; } } //點擊完要刷新,這樣每次點擊不同的方格,彈窗就可以在相應的位置顯示 refreshView(); } /** * 點擊彈出文字提示 */ private void refreshView() { invalidate(); }
繪制彈出文本框
然後看看彈出文本框的繪制:
/** * 畫方格上的文字彈框 * @param canvas 畫布 */ private void drawPopupInfo(Canvas canvas) { if (clickDay != null) {//點擊的天不為null時候才畫 //先根據方格來畫出一個小三角形,坐標就是方格的中間 Path infoPath = new Path(); //先從方格中心 infoPath.moveTo(clickDay.startX + boxSide / 2, clickDay.startY + boxSide / 2); //然後是方格的左上點 infoPath.lineTo(clickDay.startX, clickDay.startY); //然後是方格的右上點 infoPath.lineTo(clickDay.endX, clickDay.startY); //畫出三角 canvas.drawPath(infoPath,infoPaint); //畫三角上的圓角矩形 textPaint.setColor(Color.WHITE); //得到當天的文本信息 String popupInfo = clickDay.toString(); System.out.println(popupInfo); //計算文本的高度和長度用以確定矩形的大小 float infoHeight = metrics.descent - metrics.ascent; float infoLength = textPaint.measureText(popupInfo); Log.e("height",infoHeight+""); Log.e("length",infoLength+""); //矩形左上點應該是x=當前天的x+邊長/2-(文本長度/2+文本和框的間隙) float leftX = (clickDay.startX + boxSide / 2 ) - (infoLength / 2 + boxSide); //矩形左上點應該是y=當前天的y+邊長/2-(文本高度+上下文本和框的間隙) float topY = clickDay.startY-(infoHeight+2*boxSide); //矩形的右下點應該是x=leftX+文本長度+文字兩邊和矩形的間距 float rightX = leftX+infoLength+2*boxSide; //矩形的右下點應該是y=當前天的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); //繪制文字,x=leftX+文字和矩形間距,y=topY+文字和矩形上面間距+文字頂到基線高度 canvas.drawText(popupInfo,leftX+boxSide,topY+boxSide+Math.abs(metrics.ascent),textPaint); clickDay = null;//重新置空,保證點擊方格外信息消失 textPaint.setColor(Color.GRAY);//恢復畫筆顏色 } }
這樣主體邏輯完成,但需要開放設置某天提交次數的方法:
/** * 設置某天的次數 * @param year 年 * @param month 月 * @param day 日 * @param contribution 次數 */ public void setData(int year,int month,int day,int contribution){ //先找到是第幾天,為了方便不做參數檢測了 for (Day d : mDays) { if (d.year == year && d.month == month && d.date == day){ d.contribution = contribution; d.colour = getColour(contribution); break; } } refreshView(); } /** * 根據提交次數來獲取顏色值 * @param contribution 提交的次數 * @return 顏色值 */ 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,所有邏輯完成,主要涉及到一些計算,完整代碼:
/** * Created by Administrator on 2017/1/13. * 仿GitHub的提交活躍表 * 橫屏使用 */ public class GitHubContributionView extends View { /**灰色方格的默認顏色**/ private final static int DEFAULT_BOX_COLOUR = 0xFFEEEEEE; /**提交次數顏色值**/ 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"}; /**默認的padding,繪制的時候不貼邊畫**/ private int padding = 24; /**小方格的默認邊長**/ private int boxSide = 8; /**小方格間的默認間隔**/ private int boxInterval = 2; /**所有周的列數**/ private int column = 0; private List<Day> mDays;//一年中所有的天 private Paint boxPaint;//方格畫筆 private Paint textPaint;//文字畫筆 private Paint infoPaint;//彈出框畫筆 private Paint.FontMetrics metrics;//測量文字 private float downX;//按下的點的X坐標 private float downY;//按下的點的Y坐標 private Day clickDay;//按下所對應的天 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); //方格畫筆 boxPaint = new Paint(); boxPaint.setStyle(Paint.Style.FILL); boxPaint.setStrokeWidth(2); boxPaint.setColor(DEFAULT_BOX_COLOUR); boxPaint.setAntiAlias(true); //文字畫筆 textPaint = new Paint(); textPaint.setStyle(Paint.Style.FILL); textPaint.setColor(Color.GRAY); textPaint.setTextSize(12); textPaint.setAntiAlias(true); //彈出的方格信息畫筆 infoPaint = new Paint(); infoPaint.setStyle(Paint.Style.FILL); infoPaint.setColor(0xCC888888); infoPaint.setTextSize(12); infoPaint.setAntiAlias(true); //將默認值轉換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(); } /** * 畫出1-12月方格小塊和上面的月份 * @param canvas 畫布 */ private void drawBox(Canvas canvas) { //方格的左上右下坐標 float startX, startY, endX, endY; //起始月份為1月 int month = 1; for (int i = 0; i < mDays.size(); i++) { Day day = mDays.get(i); if (i == 0){ //畫1月的文本標記,坐標應該是x=padding,y=padding-boxSide/2(間隙),y坐標在表格上面一點 canvas.drawText(months[0],padding,padding-boxSide/2,textPaint); } if (day.week == 1 && i != 0) { //如果當天是周1,那麼說明增加了一列 column++; //如果列首的月份有變化,那麼說明需要畫月份 if (day.month>month){ month = day.month; //月份文本的坐標計算,x坐標在變化,而y坐標都是一樣的,boxSide/2(間隙) canvas.drawText(months[month-1],padding+column*(boxSide+boxInterval),padding-boxSide/2,textPaint); } } //計算方格坐標點,x坐標一致隨列數的增多而增加,y坐標隨行數的增多而變化 startX = padding + column * (boxSide + boxInterval); startY = padding + (day.week - 1) * (boxSide + boxInterval); endX = startX + boxSide; endY = startY + boxSide; //將該方格的坐標保存下來,這樣可以在點擊方格的時候計算彈框的坐標 day.startX = startX; day.startY = startY; day.endX = endX; day.endY = endY; //給畫筆設置當前天的顏色 boxPaint.setColor(day.colour); canvas.drawRect(startX, startY, endX, endY, boxPaint); } boxPaint.setColor(DEFAULT_BOX_COLOUR);//恢復默認顏色 } /** * 畫左側的星期 * @param canvas 畫布 */ private void drawWeek(Canvas canvas) { //文字是左對齊,所以找出最長的字 float textLength = 0; for (String week : weeks) { float tempLength = textPaint.measureText(week); if (textLength < tempLength) { textLength = tempLength; } } //依次畫出星期文本,坐標點x=padding-文本長度-文本和方格的間隙,y坐標隨行數變化 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); } /** * 畫出右下角的顏色深淺標志,因為是右對齊的所以需要從右往左畫 * @param canvas 畫布 */ private void drawTag(Canvas canvas) { //首先計算出兩個文本的長度 float moreLength = textPaint.measureText("More"); float lessLength = textPaint.measureText("Less"); //畫 More 文本,x坐標=padding+(列數+1)*(方格邊長+方格間隙)-一個方格間隙-文本長度 float moreX = padding + (column + 1) * (boxSide + boxInterval) - boxInterval - moreLength; //y坐標=padding+(方格行數+1,和表格底部有些距離)*(方格邊長+方格間隙)+字體的ascent高度 float moreY = padding + 8 * (boxSide + boxInterval) + Math.abs(metrics.ascent); canvas.drawText("More", moreX, moreY, textPaint); //畫深淺色塊,坐標根據上面的More依次計算就可以了 float interval = boxSide - 2;//文字和色塊間的距離 float leftX = moreX - interval - boxSide; float topY = moreY - boxSide; float rightX = moreX - interval; float bottomY = moreY;//色塊的Y坐標是一樣的 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); } //最後畫 Less 文本,原理同上 canvas.drawText("Less", leftX - 4 * (boxSide + boxInterval) - interval - lessLength, moreY, textPaint); } @Override public boolean onTouchEvent(MotionEvent event) { //獲取點擊時候的坐標,用來判斷點在哪天,並彈出· if (MotionEvent.ACTION_DOWN == event.getAction()) { downX = event.getX(); downY = event.getY(); findClickBox(); } return super.onTouchEvent(event); } /** * 判斷是否點擊在方格內 */ private void findClickBox() { for (Day day : mDays) { //檢測點擊的坐標如果在方格內,則彈出信息提示 if (downX >= day.startX && downX <= day.endX && downY >= day.startY && downY <= day.endY) { clickDay = day;//紀錄點擊的哪天 break; } } //點擊完要刷新,這樣每次點擊不同的方格,彈窗就可以在相應的位置顯示 refreshView(); } /** * 點擊彈出文字提示 */ private void refreshView() { invalidate(); } /** * 畫方格上的文字彈框 * @param canvas 畫布 */ private void drawPopupInfo(Canvas canvas) { if (clickDay != null) { //先根據方格來畫出一個小三角形,坐標就是方格的中間 Path infoPath = new Path(); //先從方格中心 infoPath.moveTo(clickDay.startX + boxSide / 2, clickDay.startY + boxSide / 2); //然後是方格的左上點 infoPath.lineTo(clickDay.startX, clickDay.startY); //然後是方格的右上點 infoPath.lineTo(clickDay.endX, clickDay.startY); //畫出三角 canvas.drawPath(infoPath,infoPaint); //畫三角上的圓角矩形 textPaint.setColor(Color.WHITE); //得到當天的文本信息 String popupInfo = clickDay.toString(); System.out.println(popupInfo); //計算文本的高度和長度用以確定矩形的大小 float infoHeight = metrics.descent - metrics.ascent; float infoLength = textPaint.measureText(popupInfo); Log.e("height",infoHeight+""); Log.e("length",infoLength+""); //矩形左上點應該是x=當前天的x+邊長/2-(文本長度/2+文本和框的間隙) float leftX = (clickDay.startX + boxSide / 2 ) - (infoLength / 2 + boxSide); //矩形左上點應該是y=當前天的y+邊長/2-(文本高度+上下文本和框的間隙) float topY = clickDay.startY-(infoHeight+2*boxSide); //矩形的右下點應該是x=leftX+文本長度+文字兩邊和矩形的間距 float rightX = leftX+infoLength+2*boxSide; //矩形的右下點應該是y=當前天的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); //繪制文字,x=leftX+文字和矩形間距,y=topY+文字和矩形上面間距+文字頂到基線高度 canvas.drawText(popupInfo,leftX+boxSide,topY+boxSide+Math.abs(metrics.ascent),textPaint); clickDay = null;//重新置空,保證點擊方格外信息消失 textPaint.setColor(Color.GRAY);//恢復畫筆顏色 } } /** * 設置某天的次數 * @param year 年 * @param month 月 * @param day 日 * @param contribution 次數 */ public void setData(int year,int month,int day,int contribution){ //先找到是第幾天,為了方便不做參數檢測了 for (Day d : mDays) { if (d.year == year && d.month == month && d.date == day){ d.contribution = contribution; d.colour = getColour(contribution); break; } } refreshView(); } /** * 根據提交次數來獲取顏色值 * @param contribution 提交的次數 * @return 顏色值 */ 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; } }
這樣弄個布局測試下:
<?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>
隨機弄些數據:
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沒有錄好,看看圖片效果:
查看源碼
以上所述是小編給大家介紹的Android自定義View實現仿GitHub的提交活躍表格,希望對大家有所幫助,如果大家有任何疑問請給我留言,小編會及時回復大家的。在此也非常感謝大家對本站網站的支持!
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