雷达图修改自网络https://github.com/jutao/AndroidNode/blob/master/2017/2017.3
效果图如下：
使用方法举例：
List datas =new ArrayList<>();
datas.add(new RadarView.ItemInfo("11",0));
datas.add(new RadarView.ItemInfo("22",0));
datas.add(new RadarView.ItemInfo("33",0));
datas.add(new RadarView.ItemInfo("44",0));
datas.add(new RadarView.ItemInfo("55",0));
viewHolder.myRadarview.setMaxValue(5);
viewHolder.myRadarview.setDatas(datas);
if (mTopList.size() !=0) {
viewHolder.myRadarview.updateDatas(mTopList);
}
以下为自定义RadarView
public class RadarView extends View {
private ContextmContext;
private static final StringTAG ="RadarView";
private Listdatas;
private float angle;
private float radius;
private float maxRadius;//网格最大半径
private int centerX;//中心X
private int centerY;//中心Y
private float maxValue =100;//数据最大值
private PaintmainPaint;//雷达区画笔
private PaintvaluePaint;//数据区画笔
private PainttextPaint;//文本画笔
private PaintcirclePaint;//圆形画笔
private int mainColor = Color.parseColor("#FD8BBA");
private int circleColor = Color.parseColor("#33ffffff");
private int defaultColor = Color.WHITE;
public void setDatas(List datas) {
this.datas = datas;
angle = (float) (Math.PI *2 / datas.size());
postInvalidate();
}
public void updateDatas(List datas) {
this.datas = datas;
angle = (float) (Math.PI *2 / datas.size());
postInvalidate();
}
/**
* 设置雷达图非白色的颜色
* main_color 雷达框框颜色
* circle_color 文字后面的圆形背景颜色
* default_color 雷达框内绘制区和绘制区圆点颜色
*/
public void setBgColor(int main_color,int circle_color,int default_color) {
this.mainColor = main_color;
this.circleColor = circle_color;
this.defaultColor = default_color;
mainPaint.setColor(mainColor);
valuePaint.setColor(defaultColor);
circlePaint.setColor(circleColor);
}
public static class ItemInfo {
private Stringtitle;
private int value;
public ItemInfo(String title,int value) {
this.title = title;
this.value = value;
}
}
public RadarView(Context context) {
this(context,null,0);
}
public RadarView(Context context, AttributeSet attrs) {
this(context, attrs,0);
}
public RadarView(Context context, AttributeSet attrs,int defStyleAttr) {
super(context, attrs, defStyleAttr);
mContext = context;
init();
}
private void init() {
mainPaint =new Paint();//雷达区画笔
mainPaint.setAntiAlias(true);
mainPaint.setStrokeWidth(ViewUtils.dip2px(mContext,1));
mainPaint.setColor(mainColor);
mainPaint.setStyle(Paint.Style.STROKE);
valuePaint =new Paint();//数据区画笔
valuePaint.setAntiAlias(true);
valuePaint.setColor(defaultColor);
valuePaint.setStyle(Paint.Style.FILL);
textPaint =new Paint();//文本画笔
textPaint.setAntiAlias(true);
textPaint.setColor(Color.WHITE);
datas =new ArrayList<>();
angle = (float) (Math.PI *2 /datas.size());//每个角的弧度
circlePaint =new Paint();//圆形画笔
circlePaint.setAntiAlias(true);
circlePaint.setStyle(Paint.Style.FILL);
circlePaint.setColor(circleColor);
}
@Override
protected void onSizeChanged(int w,int h,int oldw,int oldh) {
radius = Math.min(h, w) /2 *0.34f;//雷达图半径
maxRadius =radius / (datas.size() -1) *datas.size();
//中心坐标
centerX = w /2;
centerY = h /2;
postInvalidate();
super.onSizeChanged(w, h, oldw, oldh);
}
@Override
protected void onDraw(Canvas canvas) {
drawLines(canvas);
drawText(canvas);
drawRegion(canvas);
}
@Override
protected void onMeasure(int widthMeasureSpec,int heightMeasureSpec) {
super.onMeasure(widthMeasureSpec, heightMeasureSpec);
int size =0;
int width = getMeasuredWidth();
int height = getMeasuredHeight();
if (width > height) {
size = height;
}else {
size = width;
}
setMeasuredDimension(size, size);
// setMeasuredDimension(ViewUtils.getScreenWidth(mContext) / 375 * 267,ViewUtils.getScreenWidth(mContext) / 375 * 267);
}
/**
* 绘制直线
*/
private void drawLines(Canvas canvas) {
Path path =new Path();
Path pathOut =new Path();
for (int i =0; i
path.reset();
path.moveTo(centerX,centerY);
float x = (float) (centerX +maxRadius * Math.sin(angle * i));
float y = (float) (centerY -maxRadius * Math.cos(angle * i));
path.lineTo(x, y);
if (i ==0)
pathOut.moveTo(x, y);
else
pathOut.lineTo(x, y);
canvas.drawPath(path,mainPaint);//画出中间分割线
}
//画出最外层多边形
pathOut.close();
canvas.drawPath(pathOut,mainPaint);
}
/**
* 绘制文字
* 其实四个象限，是以(centerX, centerY)为圆点的象限
*
* @param canvas
*/
private void drawText(Canvas canvas) {
for (int i =0; i
float rx = (float) (centerX +maxRadius *1.77 * Math.sin(angle * i));
float ry = (float) (centerY -maxRadius *1.77 * Math.cos(angle * i));
drawCircle(canvas, rx, ry);//画出文字外边圈
textPaint.setTextAlign(Paint.Align.CENTER);
textPaint.setTextSize(ViewUtils.sp2px(getContext(),18));
canvas.drawText(String.valueOf(datas.get(i ).value), rx, ry -9,textPaint);
textPaint.setTextSize(ViewUtils.sp2px(getContext(),12));
canvas.drawText(String.valueOf(datas.get(i ).title), rx, ry +40,textPaint);
}
}
/*
* 绘制文字外的圆
*/
private void drawCircle(Canvas canvas,float x,float y) {
canvas.drawCircle(x, y, ViewUtils.dip2px(mContext,31.5f),circlePaint);
}
/**
* 绘制中间有效区域
*
* @param canvas
*/
private void drawRegion(Canvas canvas) {
Path path =new Path();
for (int i =0; i
double percent =datas.get(i).value /maxValue;//计算该数值与最大值比例
//小圆点所在位置距离圆心的距离
float x = (float) (centerX +maxRadius * Math.sin(angle * i) * percent);
float y = (float) (centerY -maxRadius * Math.cos(angle * i) * percent);
if (i ==0) {
path.moveTo(x, y);
}else {
path.lineTo(x, y);
}
valuePaint.setStyle(Paint.Style.FILL);
canvas.drawCircle(x, y, ViewUtils.dip2px(mContext,2),valuePaint);
}
path.close();
canvas.save();
valuePaint.setColor(defaultColor);
valuePaint.setStyle(Paint.Style.FILL);
valuePaint.setAlpha(90);
canvas.drawPath(path,valuePaint);
canvas.save();
valuePaint.setStrokeWidth(ViewUtils.dip2px(mContext,1));
valuePaint.setColor(defaultColor);
valuePaint.setStyle(Paint.Style.STROKE);
canvas.drawPath(path,valuePaint);
}
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);
}
}