摘要:原文鏈接公司產(chǎn)品需要一個(gè)雷達(dá)圖來(lái)展示各維度的比重,網(wǎng)上找了一波,學(xué)到不少,直接自己上手來(lái)擼一記無(wú)圖言虛空簡(jiǎn)單分析一波,確定雷達(dá)圖正幾邊形的正五邊形,分為幾個(gè)層數(shù)層畫(huà)邊畫(huà)線描繪文字覆蓋區(qū)域主要這幾步,開(kāi)擼自定義繼承確定需要使用的變量,
原文鏈接 https://mp.weixin.qq.com/s/Ms...
公司產(chǎn)品需要一個(gè)雷達(dá)圖來(lái)展示各維度的比重,網(wǎng)上找了一波,學(xué)到不少,直接自己上手來(lái)擼一記
無(wú)圖言虛空
簡(jiǎn)單分析一波,確定雷達(dá)圖正幾邊形的--正五邊形 int count=5,分為幾個(gè)層數(shù)--4 層 int layerCount=4
? ? @Override ? ? protected void onDraw(Canvas canvas) { ? ? ? ? super.onDraw(canvas); ? ? ? ? drawPolygon(canvas);//畫(huà)邊 ? ? ? ? drawLines(canvas);//畫(huà)線 ? ? ? ? drawText(canvas);//描繪文字 ? ? ? ? drawRegion(canvas);//覆蓋區(qū)域 ? ? }
主要這幾步,開(kāi)擼!
自定義RadarView繼承View確定需要使用的變量,初始化paint,計(jì)算圓心角
private int count = 5; //幾邊形? ? private int layerCount = 4; //層數(shù)? ? privatefloatangle; //每條邊對(duì)應(yīng)的圓心角? ? private int centerX; //圓心x? ? private int centerY; //圓心y? ? privatefloatradius; //半徑? ? private Paint polygonPaint; //邊框paint? ? private Paint linePaint; //連線paint? ? private Paint txtPaint; //文字paint? ? private Paint circlePaint; //圓點(diǎn)paint? ? private Paint regionColorPaint; //覆蓋區(qū)域paint? ? private Double[] percents = {0.91, 0.35, 0.12, 0.8, 0.5}; //覆蓋區(qū)域百分比? ? private String[] titles = {"dota","斗地主","大吉大利,晚上吃雞","爐石傳說(shuō)","跳一跳"};//文字
public RadarView(Context context) { this(context, null, 0); } public RadarView(Context context, @Nullable AttributeSet attrs) { this(context, attrs, 0); } public RadarView(Context context, @Nullable AttributeSet attrs, int defStyleAttr) { super(context, attrs, defStyleAttr); //計(jì)算圓心角 angle = (float) (Math.PI * 2 / count); polygonPaint = new Paint(); polygonPaint.setColor(ContextCompat.getColor(context, R.color.radarPolygonColor)); polygonPaint.setAntiAlias(true); polygonPaint.setStyle(Paint.Style.STROKE); polygonPaint.setStrokeWidth(4f); linePaint = new Paint(); linePaint.setColor(ContextCompat.getColor(context, R.color.radarLineColor)); linePaint.setAntiAlias(true); linePaint.setStyle(Paint.Style.STROKE); linePaint.setStrokeWidth(2f); txtPaint = new Paint(); txtPaint.setColor(ContextCompat.getColor(context, R.color.radarTxtColor)); txtPaint.setAntiAlias(true); txtPaint.setStyle(Paint.Style.STROKE); txtPaint.setTextSize(DensityUtil.dpToPx(context, 12)); circlePaint = new Paint(); circlePaint.setColor(ContextCompat.getColor(context, R.color.radarCircleColor)); circlePaint.setAntiAlias(true); regionColorPaint = new Paint(); regionColorPaint.setColor(ContextCompat.getColor(context, R.color.radarRegionColor)); regionColorPaint.setStyle(Paint.Style.FILL); regionColorPaint.setAntiAlias(true); }確定中心點(diǎn)
需要正五邊形得有一個(gè)圓,圓內(nèi)接正五邊形,在onSizeChanged方法里獲取圓心,確定半徑
? ? @Override
? ? protected void onSizeChanged(int w, int h, int oldw, int oldh) {
? ? ? ? super.onSizeChanged(w, h, oldw, oldh);
? ? ? ? radius = Math.min(h, w) / 2 * 0.7f;
? ? ? ? centerX = w / 2;
? ? ? ? centerY = h / 2;
? ? }
繪制正五邊形同時(shí)描繪最外圍的點(diǎn),確定分為4層,半徑 / 層數(shù) =每層之間的間距,從最里層開(kāi)始畫(huà)正五邊形,每層第一個(gè)點(diǎn)位于中心點(diǎn)正上方
private void drawPolygon(Canvas canvas) { Path path = new Path(); float r = radius / layerCount; for (int i = 1; i <= layerCount; i++) { float curR = r * i; //當(dāng)前所在層的半徑 for (int j = 0; j < count; j++) { if (j == 0) { //每一層第一個(gè)點(diǎn)坐標(biāo) path.moveTo(centerX, centerY - curR); } else { //順時(shí)針記錄其余頂角的點(diǎn)坐標(biāo) float x = (float) (centerX + Math.sin(angle * j) * curR); float y = (float) (centerY - Math.cos(angle * j) * curR); path.lineTo(x, y); } } //最外層的頂角外面的五個(gè)小圓點(diǎn)(圖中紅色部分) if (i == layerCount) { for (int j = 0; j < count; j++) { float x = (float) (centerX + Math.sin(angle * j) * (curR + 12)); float y = (float) (centerY - Math.cos(angle * j) * (curR + 12)); canvas.drawCircle(x, y, 4, circlePaint); } } path.close(); canvas.drawPath(path, polygonPaint); } }繪制連線
繪制最內(nèi)層頂角到最外層頂角的連線
private void drawLines(Canvas canvas) { float r = radius / layerCount; for (int i = 0; i < count; i++) { //起始坐標(biāo) 從中心開(kāi)始的話 startx=centerX , startY=centerY float startX = (float) (centerX + Math.sin(angle * i) * r); float startY = (float) (centerY - Math.cos(angle * i) * r); //末端坐標(biāo) float endX = (float) (centerX + Math.sin(angle * i) * radius); float endY = (float) (centerY - Math.cos(angle * i) * radius); canvas.drawLine(startX, startY, endX, endY, linePaint); } }
至此簡(jiǎn)易雷達(dá)圖成型,可以修改正幾邊形,多少層數(shù)(后續(xù)繼續(xù)添加文字)
//設(shè)置幾邊形,**注意:設(shè)置幾邊形需要重新計(jì)算圓心角** public void setCount(int count){ this.count = count; angle = (float) (Math.PI * 2 / count); invalidate(); } //設(shè)置層數(shù) public void setLayerCount(int layerCount){ this.layerCount = layerCount; invalidate(); }
設(shè)置正六邊形、六層
? ? radarView.setCount(6);
? ? radarView.setLayerCount(6);
對(duì)于以下圖形的,可以設(shè)置第一個(gè)點(diǎn)坐標(biāo)位于中心點(diǎn)正右側(cè)(centerX+curR,centerY),順時(shí)針計(jì)算其余頂點(diǎn)坐標(biāo)x = (float) (centerX+curR*Math.cos(angle*j)), y = (float) (centerY+curR*Math.sin(angle*j)),同理連線等其余坐標(biāo)相應(yīng)改變...
由于各產(chǎn)品維度內(nèi)容不同,所需雷達(dá)圖樣式不一,這里只是描繪下不同位置的文字處理情況,具體需求還得按產(chǎn)品來(lái),因產(chǎn)品而異
private void drawText(Canvas canvas) { for (int i = 0; i < count; i++) { //獲取到雷達(dá)圖最外邊的坐標(biāo) float x = (float) (centerX + Math.sin(angle * i) * (radius + 12)); float y = (float) (centerY - Math.cos(angle * i) * (radius + 12)); if (angle * i == 0) { //第一個(gè)文字位于頂角正上方 txtPaint.setTextAlign(Paint.Align.CENTER); canvas.drawText(titles[i], x, y - 18, txtPaint); txtPaint.setTextAlign(Paint.Align.LEFT); } else if (angle * i > 0 && angle * i < Math.PI / 2) { //微調(diào) canvas.drawText(titles[i], x + 18, y + 10, txtPaint); } else if (angle * i >= Math.PI / 2 && angle * i < Math.PI) { //最右下的文字獲取到文字的長(zhǎng)、寬,按文字長(zhǎng)度百分比向左移 String txt = titles[i]; Rect bounds = new Rect(); txtPaint.getTextBounds(txt, 0, txt.length(), bounds); float height = bounds.bottom - bounds.top; float width = txtPaint.measureText(txt); canvas.drawText(txt, x - width * 0.4f, y + height + 18, txtPaint); } else if (angle * i >= Math.PI && angle * i < 3 * Math.PI / 2) { //同理最左下的文字獲取到文字的長(zhǎng)、寬,按文字長(zhǎng)度百分比向左移 String txt = titles[i]; Rect bounds = new Rect(); txtPaint.getTextBounds(txt, 0, txt.length(), bounds); float width = txtPaint.measureText(txt); float height = bounds.bottom - bounds.top; canvas.drawText(txt, x - width * 0.6f, y + height + 18, txtPaint); } else if (angle * i >= 3 * Math.PI / 2 && angle * i < 2 * Math.PI) { //文字向左移動(dòng) String txt = titles[i]; float width = txtPaint.measureText(txt); canvas.drawText(txt, x - width - 18, y + 10, txtPaint); } } }繪制覆蓋區(qū)域
繪制覆蓋區(qū)域,百分比取連線長(zhǎng)度的百分比(如果從中心點(diǎn)開(kāi)始的連線,則是半徑的百分比),此處用半徑radius減去間隔r即連線長(zhǎng)度
private void drawRegion(Canvas canvas) { Path path = new Path(); float r = radius / layerCount;//每層的間距 for (int i = 0; i < count; i++) { if (i == 0) { path.moveTo(centerX, (float) (centerY - r - (radius - r) * percents[i])); } else { float x = (float) (centerX + Math.sin(angle * i) * (percents[i] * (radius - r) + r)); float y = (float) (centerY - Math.cos(angle * i) * (percents[i] * (radius - r) + r)); path.lineTo(x, y); } } path.close(); canvas.drawPath(path, regionColorPaint); }
至此,一個(gè)簡(jiǎn)單的雷達(dá)圖完畢。
歡迎關(guān)注我的博客:https://blog.manjiexiang.cn/
同時(shí)歡迎關(guān)注微信公眾號(hào)
文章版權(quán)歸作者所有,未經(jīng)允許請(qǐng)勿轉(zhuǎn)載,若此文章存在違規(guī)行為,您可以聯(lián)系管理員刪除。
轉(zhuǎn)載請(qǐng)注明本文地址:http://systransis.cn/yun/69544.html
摘要:開(kāi)箱即用的源碼地址洋蔥數(shù)學(xué)同款雷達(dá)圖支持自定義屬性雷達(dá)網(wǎng)的半徑該屬性決定了的寬高各屬性表示的最大進(jìn)度雷達(dá)網(wǎng)的顏色雷達(dá)網(wǎng)的線寬各屬性文字的顏色各屬性文字和中心處名字的字體路徑中心連接區(qū)域的顏色中心連接區(qū)域的邊框顏色中心處的名字中showImg(https://user-gold-cdn.xitu.io/2019/5/13/16ab091f638c526a); showImg(https://u...
摘要:酷炫的切換動(dòng)畫(huà),打造更好的用戶(hù)體驗(yàn)貝塞爾曲線實(shí)現(xiàn)冒泡泡動(dòng)畫(huà)一個(gè)絢麗的動(dòng)效分析與實(shí)現(xiàn)雷達(dá)圖蜘蛛網(wǎng)圖繪制唯美的動(dòng)畫(huà)效果仿支付寶信用效果 酷炫的Activity切換動(dòng)畫(huà),打造更好的用戶(hù)體驗(yàn) [Github:]()showImg(https://segmentfault.com/img/remote/1460000006761755?w=400&h=711); 貝塞爾曲線實(shí)現(xiàn)冒泡泡動(dòng)畫(huà) [Gi...
閱讀 3578·2021-09-24 09:48
閱讀 1105·2021-09-10 10:51
閱讀 3283·2019-08-30 13:03
閱讀 3331·2019-08-30 12:51
閱讀 1399·2019-08-30 11:22
閱讀 1074·2019-08-29 18:38
閱讀 2045·2019-08-29 16:41
閱讀 3216·2019-08-29 15:32