Android 雷达图（网状图）

有的称为雷达图，也有的说是网状图具体什么图就是这图吧，先看效果

要想实现此图其实也不是很难，由于当时刚见到图的时候有点不知所措，因为不是简单的画圆，而是需要根据数据的大小进行在交叉的地方画点，而且所要画的点是有区域范围的，不同的区域显示的点的颜色是不同的，而且还要把这些点连接起来，当时就感觉有点蒙，不过还好还是做出来了
不扯了上代码

public class RadarView extends View {private int count = 8; // 数据个数private float angle = (float) (Math.PI * 2 / count);private float radius; // 网格最大半径private int centerX; // 中心Xprivate int centerY; // 中心Yprivate String[] titles = { "旅游", "吃饭", "购物", "娱乐", "会友", "转账","红包", "看病" };private double[] data = { 100, 60, 60, 60, 100, 50, 30, 70 }; // 各维度分值private String[] data1 = { "100", "60", "60", "60", "100", "50", "30","70" }; // 各维度分值private float maxValue = 100; // 数据最大值private Paint mainPaint; // 雷达区画笔private Paint valuePaint; // 数据区画笔private Paint textPaint; // 文本画笔private float x1;private float y1;private float curR1;private float curR2;private float curR3;private float x2;private float y2;private float x3;private float y3;private int screenWidth;private int ten;private int twenty;private int thirty;private int forty;private int fifty;private int sixty;private int hun_2;public RadarView(Context context, AttributeSet attrs, int defStyleAttr) {super(context, attrs, defStyleAttr);init();}public RadarView(Context context, AttributeSet attrs) {super(context, attrs);init();}public RadarView(Context context) {super(context);init();}// 初始化private void init() {screenWidth = ScreenUtils.getScreenWidth(getContext());ten = (int) (0.0094*screenWidth);twenty = (int) (0.018*screenWidth);thirty = (int) (0.027*screenWidth);forty = (int) (0.036*screenWidth);fifty = (int) (0.045*screenWidth);sixty = (int) (0.054*screenWidth);hun_2 = (int) (0.18*screenWidth);count = Math.min(data.length, titles.length);mainPaint = new Paint();mainPaint.setAntiAlias(true);mainPaint.setColor(Color.parseColor("#6BD18E"));mainPaint.setStyle(Paint.Style.STROKE);valuePaint = new Paint();valuePaint.setAntiAlias(true);valuePaint.setColor(Color.parseColor("#00BF33"));valuePaint.setStyle(Paint.Style.FILL_AND_STROKE);textPaint = new Paint();textPaint.setTextSize(forty);textPaint.setStyle(Paint.Style.FILL);textPaint.setColor(Color.BLACK);}@Overrideprotected void onSizeChanged(int w, int h, int oldw, int oldh) {radius = Math.min(h, w) / 2 * 0.7f;centerX = w / 2;centerY = h / 2;postInvalidate();super.onSizeChanged(w, h, oldw, oldh);}@Overrideprotected void onDraw(Canvas canvas) {drawCircle(canvas);drawLines(canvas);drawText(canvas);drawRegion(canvas);}/*** 绘制圆*/private void drawCircle(Canvas canvas) {Path path = new Path();float r = radius / (count - 1);for (int i = 3; i < count; i += 2) {float curR = r * i;curR1 = r * 3;curR2 = r * 5;curR3 = r * 7;for (int j = 1; j < count; j += 2) {if (j == 0) {path.moveTo(centerX + curR, centerY);} }canvas.drawCircle(centerX, centerX, curR, mainPaint);}}/*** 绘制直线*/private void drawLines(Canvas canvas) {Path path = new Path();for (int i = 0; i < count; i++) {path.reset();path.moveTo(centerX, centerY);float x = (float) (centerX + radius * Math.cos(angle * i));float y = (float) (centerY + radius * Math.sin(angle * i));path.lineTo(x, y);canvas.drawPath(path, mainPaint);}}/*** 绘制文字* * @param canvas*/private void drawText(Canvas canvas) {Paint.FontMetrics fontMetrics = textPaint.getFontMetrics();float fontHeight = fontMetrics.descent - fontMetrics.ascent;for (int i = 0; i < count; i++) {float x = (float) (centerX + (radius + fontHeight / 2)* Math.cos(angle * i));float y = (float) (centerY + (radius + fontHeight / 2)* Math.sin(angle * i));x2 = (float) (centerX + (curR1 + fontHeight / 2)* Math.cos(angle * i));y2 = (float) (centerY + (curR1 + fontHeight / 2)* Math.sin(angle * i));x3 = (float) (centerX + (curR2 + fontHeight / 2)* Math.cos(angle * i));y3 = (float) (centerY + (curR2 + fontHeight / 2)* Math.sin(angle * i));x1 = (float) (centerX + (radius + fontHeight / 2)* Math.cos(angle * i));y1 = (float) (centerY + (radius + fontHeight / 2)* Math.sin(angle * i));float dis = textPaint.measureText(titles[i]);// 文本长度float datadis = valuePaint.measureText(data1[i]);// 文本长度if (angle * i >= 0 && angle * i <= Math.PI / 4) {canvas.drawText(data1[i], x1 - fifty, y1 + ten, textPaint);canvas.drawText(data1[i], x2 - forty, y2 + twenty, textPaint);canvas.drawText(data1[i], x3 - forty, y3 + twenty, textPaint);canvas.drawText(titles[i], x + thirty, y + ten, textPaint);} else if (angle * i >= Math.PI / 4 && angle * i <= Math.PI / 2) {canvas.drawText(data1[i], x2 - ten, y2 + ten, textPaint);canvas.drawText(data1[i], x3 - ten, y3 + ten, textPaint);canvas.drawText(data1[i], x1 - fifty, y1, textPaint);canvas.drawText(titles[i], x + thirty, y + fifty, textPaint);} else if (angle * i >= Math.PI / 2 && angle * i <= Math.PI * 3 / 4) {canvas.drawText(data1[i], x2 - ten, y2 + ten, textPaint);canvas.drawText(data1[i], x3 - ten, y3 + ten, textPaint);canvas.drawText(data1[i], x - twenty, y1 - twenty, textPaint);canvas.drawText(titles[i], x - dis / 2, y + sixty, textPaint);} else if (angle * i >= Math.PI * 3 / 4 && angle * i <= Math.PI) {canvas.drawText(data1[i], x2 - ten, y2 + ten, textPaint);canvas.drawText(data1[i], x3 - ten, y3 + ten, textPaint);canvas.drawText(data1[i], x + ten, y1, textPaint);canvas.drawText(titles[i], x - hun_2, y + fifty, textPaint);} else if (angle * i >= Math.PI && angle * i <= Math.PI * 5 / 4) {canvas.drawText(data1[i], x2 - ten, y2 + ten, textPaint);canvas.drawText(data1[i], x3 - ten, y3 + ten, textPaint);canvas.drawText(data1[i], x - ten, y1 + ten, textPaint);canvas.drawText(titles[i], x - dis - forty, y + ten, textPaint);} else if (angle * i >= Math.PI * 5 / 4&& angle * i <= Math.PI * 3 / 2) {canvas.drawText(data1[i], x2 - ten, y2 + ten, textPaint);canvas.drawText(data1[i], x3 - ten, y3 + ten, textPaint);canvas.drawText(data1[i], x - ten, y1 + ten, textPaint);canvas.drawText(titles[i], x - dis - forty, y - fifty, textPaint);} else if (angle * i >= Math.PI * 3 / 2&& angle * i <= Math.PI * 7 / 4) {canvas.drawText(data1[i], x2 - ten, y2 + twenty, textPaint);canvas.drawText(data1[i], x3 - ten, y3 + twenty, textPaint);canvas.drawText(data1[i], x - ten, y1 + forty, textPaint);canvas.drawText(titles[i], x - dis / 2, y - fifty, textPaint);} else if (angle * i >= Math.PI * 7 / 4 && angle * i <= Math.PI * 2) {canvas.drawText(data1[i], x2 - ten, y2 + twenty, textPaint);canvas.drawText(data1[i], x3 - ten, y3 + twenty, textPaint);canvas.drawText(data1[i], x - twenty, y1 + twenty, textPaint);canvas.drawText(titles[i], x + sixty, y - fifty, textPaint);}}}/*** 绘制区域* * @param canvas*/private void drawRegion(Canvas canvas) {Path path = new Path();valuePaint.setAlpha(255);for (int i = 0; i < count; i++) {double percent = data[i] / maxValue;float x = (float) (centerX + radius * Math.cos(angle * i) * percent);float y = (float) (centerY + radius * Math.sin(angle * i) * percent);if (i == 0) {path.moveTo(x, centerY);} else {path.lineTo(x, y);}double sx = Math.PI* ((x - centerX) * (x - centerX) + (y - centerY)* (y - centerY));double s1 = Math.PI * curR1 * curR1;double s2 = Math.PI * curR2 * curR2;double s3 = Math.PI * curR3 * curR3;if (0 < sx && sx <= s1) {valuePaint.setColor(Color.parseColor("#FF2022"));canvas.drawCircle(x, y, ten, valuePaint);}if (s1 < sx && sx <= s2) {valuePaint.setColor(Color.parseColor("#FFA10C"));canvas.drawCircle(x, y, ten, valuePaint);}if (s2 < sx && sx <= s3) {valuePaint.setColor(Color.parseColor("#00BF33"));canvas.drawCircle(x, y, ten, valuePaint);}}valuePaint.setColor(Color.parseColor("#00BF33"));valuePaint.setStyle(Paint.Style.STROKE);canvas.drawPath(path, valuePaint);valuePaint.setAlpha(127);// 绘制填充区域valuePaint.setStyle(Paint.Style.FILL_AND_STROKE);canvas.drawPath(path, valuePaint);}// 设置标题public void setTitles(String[] titles) {this.titles = titles;}// 设置数值public void setData(double[] data) {this.data = data;}public float getMaxValue() {return maxValue;}// 设置最大数值public void setMaxValue(float maxValue) {this.maxValue = maxValue;}// 设置蜘蛛网颜色public void setMainPaintColor(int color) {mainPaint.setColor(color);}// 设置标题颜色public void setTextPaintColor(int color) {textPaint.setColor(color);}// 设置覆盖局域颜色public void setValuePaintColor(int color) {valuePaint.setColor(color);}
}

就是这么一个类花费我大半天时间，粘出来供大家参考，为大家节约一点时间。
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