Android Canvas練習(10)自已繪南丁格爾玫瑰圖(Nightingale rose diagram)

南丁格爾玫瑰圖 在常規圖表中實在很驚艷，但我初看沒看懂，一查原來南丁格爾這麼偉大，確實值得尊敬。

再仔細研究了下這種圖的構成，發現原來就是把柱形圖的柱形換成了扇形圖的半徑來表示，當然，變種有好多，

我這只是說我理解的這種。

知道了其構成方式後就好實現了，依傳入參數個數決定其扇形角度，依百分比決定其扇形的半徑長度，然後

就一切都水到渠成了。

漂亮的美圖獻上:

vcnPyrXP1rT6wus6PC9wPgo8cD4gICAgPC9wPgo8cHJlIGNsYXNzPQ=="brush:java;">package com.xcl.chart; /** * Canvas練習 * 自已畫南丁格爾玫瑰圖(Nightingale rose diagram) * * author:xiongchuanliang * date:2014-4-12 */ import android.content.Context; import android.graphics.Canvas; import android.graphics.Color; import android.graphics.Paint; import android.graphics.Paint.Style; import android.graphics.RectF; import android.util.DisplayMetrics; import android.view.View; public class PanelRoseChart extends View{ private int ScrWidth,ScrHeight; //演示用的百分比例,實際使用中，即為外部傳入的比例參數 private final float arrPer[] = new float[]{40f,50f,60f,35f,70f,80f,90f}; //演示用標簽 private final String arrPerLabel[] = new String[]{"PostgreSQL","Sybase","DB2","國產及其它","MySQL","Ms Sql","Oracle"}; //RGB顏色數組 private final int arrColorRgb[][] = { {77, 83, 97}, {148, 159, 181}, {253, 180, 90}, {52, 194, 188}, {39, 51, 72}, {255, 135, 195}, {215, 124, 124}} ; public PanelRoseChart(Context context) { super(context); // TODO Auto-generated constructor stub //屏幕信息 DisplayMetrics dm = getResources().getDisplayMetrics(); ScrHeight = dm.heightPixels; ScrWidth = dm.widthPixels; } public void onDraw(Canvas canvas){ //畫布背景 canvas.drawColor(Color.BLACK); float cirX = ScrWidth / 2; float cirY = ScrHeight / 3 ; float radius = ScrHeight / 5 ;//150; float arcLeft = cirX - radius; float arcTop = cirY - radius ; float arcRight = cirX + radius ; float arcBottom = cirY + radius ; RectF arcRF0 = new RectF(arcLeft ,arcTop,arcRight,arcBottom); //畫筆初始化 Paint PaintArc = new Paint(); Paint PaintLabel = new Paint(); PaintLabel.setColor(Color.WHITE); PaintLabel.setTextSize(16); PaintLabel.setAntiAlias(true); PaintArc.setAntiAlias(true); //位置計算類 XChartCalc xcalc = new XChartCalc(); float Percentage = 0.0f; float CurrPer = 0.0f; float NewRaidus = 0.0f; int i= 0; //將百分比轉換為扇形半徑長度 Percentage = 360 / arrPer.length; Percentage = (float)(Math.round(Percentage *100))/100; for(i=0; i 代碼實現起來很容易，但這種圖的設計創意確實非常好。 歎服。

一定要附上南丁格爾維基百科的鏈接: http://zh.wikipedia.org/wiki/%E5%BC%97%E7%BE%85%E5%80%AB%E6%96%AF%C2%B7%E5%8D%97%E4%B8%81%E6%A0%BC%E7%88%BE

感興趣的可以看看。

附上我其它繪制的圖鏈接:

Android Canvas練習(1)畫一張報表來玩

Android Canvas練習(2)自已繪餅圖

Android Canvas練習(3)自已繪柱形圖

Android Canvas練習(4)自已繪折線圖

Android Canvas練習(5)自已繪面積圖(Area Chart)

Android Canvas練習(7)繪制歐冠八強防守&控制率數據對比圖

Android Canvas練習(8)自已繪環形圖(Dount Chart)

Android Canvas練習(9)自已繪分割突出效果的餅圖(Pie Chart)

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