android雷达图

最近做雷达图，根据网上的资料自己整理了一个。可以根据个人需求，自定义雷达的形状和多边形的边的数目，也可以空值雷达图的旋转。效果图如下：

完整代码如下：
`public class RadarView extends View {
/* 默认宽度为300x00/
private int WRAP_WIDTH;
private int WRAP_HEIGHT;
/* 绘制多边形的画笔 /
private Paint mPaintPolygon;
/* 绘制直线的画笔 /
private Paint mPaintLine;
/* 绘制分值区的画笔 /
private Paint mPaintRegion;

/** * 雷达的边数 */private static final int NUM_OF_SIDES = 5;/** 角度 */private float mAngel = (float) (2 * Math.PI / NUM_OF_SIDES);/** 多边形的绘制路径 */private Path mPathPolygon;/** 多边形的起始半径 */private float mStartRadius;/** 直线的绘制路径 */private Path mPathLine;/** 分值区的绘制路径 */private Path mPathRegion;/** 中心点 x 轴坐标*/private int mCenterX;/** 中心点 y 轴坐标 */private int mCenterY;/** 分值区*/float[] percents = new float[3];public RadarView(Context context) {    this(context, null);}public RadarView(Context context, AttributeSet attrs) {    super(context, attrs);    init(context);}private void init(Context context) {    //1、获取Preferences    SharedPreferences width = context.getSharedPreferences("width", 0);    //2、取出数据    int w = width.getInt("width",370);    WRAP_WIDTH = w*3/5;    WRAP_HEIGHT = WRAP_WIDTH;    mStartRadius = WRAP_WIDTH/10;    Log.d("----", "init: " + w);    mPaintPolygon = new Paint(Paint.ANTI_ALIAS_FLAG);    mPaintPolygon.setStyle(Paint.Style.STROKE);    mPaintPolygon.setColor(Color.BLACK);    mPaintPolygon.setStrokeWidth(1F);    mPaintLine = new Paint(Paint.ANTI_ALIAS_FLAG);    mPaintLine.setStyle(Paint.Style.STROKE);    mPaintLine.setColor(Color.GRAY);    mPaintLine.setStrokeWidth(1F);    mPaintRegion = new Paint(Paint.ANTI_ALIAS_FLAG);    mPaintRegion.setStyle(Paint.Style.FILL_AND_STROKE);    mPaintRegion.setColor(Color.parseColor("#7f33b5e5"));    mPaintRegion.setStrokeWidth(1F);    mPathPolygon = new Path();    mPathLine = new Path();    mPathRegion = new Path();}@Overrideprotected void onSizeChanged (int w, int h, int oldw, int oldh) {    mCenterX = w / 2;    mCenterY = h / 2;}@Overrideprotected void onDraw(Canvas canvas) {    /**调整图像偏转*/    canvas.rotate(30,mCenterX,mCenterY);    drawPolygon(canvas);    drawLine(canvas);    drawRegion(canvas);}/** * 调整view的宽高 * */@Overrideprotected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {    super.onMeasure(widthMeasureSpec, heightMeasureSpec);    int width = MeasureSpec.getSize(widthMeasureSpec);    int widthMode = MeasureSpec.getMode(widthMeasureSpec);    int height = MeasureSpec.getSize(heightMeasureSpec);    int heightMode = MeasureSpec.getMode(heightMeasureSpec);    if (widthMode == MeasureSpec.AT_MOST && heightMode == MeasureSpec.AT_MOST) {        setMeasuredDimension(WRAP_WIDTH, WRAP_HEIGHT);    } else if (widthMode == MeasureSpec.AT_MOST) {        setMeasuredDimension(WRAP_WIDTH, height);    } else if (heightMode == MeasureSpec.AT_MOST) {        setMeasuredDimension(width, WRAP_HEIGHT);    }}/** * 分值区的大小 * */public void setRegionValue(float health,float protection,float nutrition) {    percents[0] = health;    percents[1] = protection;    percents[2] = nutrition;}/** * 绘制分值区 */private void drawRegion(Canvas canvas) {    float radius = mStartRadius * 5;    for (int i = 0; i < NUM_OF_SIDES; i++) {        float x = (float) (Math.cos(mAngel * i) * radius * percents[0]);        float y = (float) (Math.sin(mAngel * i) * radius * percents[0]);        if (i == 0) {            mPathRegion.moveTo(mCenterX + x, mCenterY);        } else {            mPathRegion.lineTo(mCenterX + x, mCenterY + y);        }    }    mPathRegion.close();    canvas.drawPath(mPathRegion, mPaintRegion);}/** * 绘制直线 */private void drawLine(Canvas canvas) {    float radius = mStartRadius * 5;    for (int i = 0; i < NUM_OF_SIDES; i++) {        mPathLine.moveTo(mCenterX, mCenterY);        float x = (float) (mCenterX + Math.cos(mAngel * i) * radius);        float y = (float) (mCenterY + Math.sin(mAngel * i) * radius);        mPathLine.lineTo(x, y);        canvas.drawPath(mPathLine, mPaintLine);    }}/** * 绘制多边形 */private void drawPolygon(Canvas canvas) {    for (int count = 1; count <= 5; count++) {        float newRadius = mStartRadius * count;        mPathPolygon.moveTo(mCenterX + newRadius, mCenterY);        for (int i = 1; i < NUM_OF_SIDES; i++) {            float x = (float) (mCenterX + Math.cos(mAngel * i) * newRadius);            float y = (float) (mCenterY + Math.sin(mAngel * i) * newRadius);            mPathPolygon.lineTo(x, y);        }        mPathPolygon.close();        canvas.drawPath(mPathPolygon, mPaintPolygon);        mPathPolygon.reset();    }}

}`
其中setRegionValue();方法用来控制数据，init方法中还根据屏幕的宽度来确定雷达图的大小，使用SharedPreferences在程序启动的时候获取屏幕的宽度。