如何给自定义多边形view填充颜色

canvas android

一下是我的多边形的代码
package com.example.bingyantest;

import android.content.ContentValues;
import android.content.Context;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.Paint;
import android.graphics.Path;
import android.util.AttributeSet;
import android.util.Log;
import android.view.View;
import android.widget.Button;

/**

Created by HP on 2017/3/6.

算法思想：每画出一条边旋转一次画布，最终旋转N次，画出N条边

边的计算方法：利用多边形对应的外接园半径 R */

public class MyView extends View {

private Paint mpaint,npaint; private float radius, start_x, start_y, end_x, end_y; private float m = 30; private float UNIT = 360 / m; private float Xo,Yo; //用于保存起始点的数据 public MyView(Context context) { this(context, null); } public MyView(Context context, AttributeSet attrs) { this(context, attrs, 0); } public MyView(Context context, AttributeSet attrs, int defStyleAttr) { super(context, attrs, defStyleAttr); Log.d("222", "MyView: "+UNIT); mpaint = new Paint(); npaint = new Paint(); } @Override protected void onSizeChanged(int w, int h, int oldw, int oldh) { super.onSizeChanged(w, h, oldw, oldh); float mW = getMeasuredWidth(); float mH = getMeasuredHeight(); start_x = mW / 2; start_y = mH / 2; Xo = start_x; Yo = start_y; radius = Math.min(mW, mH) / 3; } @Override protected void onDraw(Canvas canvas) { super.onDraw(canvas); mpaint.setStyle(Paint.Style.STROKE); mpaint.setStrokeWidth(6); if (m > 24) { npaint.setColor(Color.RED); canvas.drawCircle(start_x,start_y,radius,npaint); canvas.drawCircle(start_x, start_y, radius, mpaint); } else { end_x = (float) (radius * Math.sin(Math.toRadians(UNIT))); end_x = start_x + end_x; end_y = (float) (radius * Math.cos(Math.toRadians(UNIT))); end_y = start_y - end_y; for (int i = 0; i < m; i++) { canvas.save(); canvas.rotate(UNIT * i, start_x, start_y); canvas.drawLine(start_x, start_y - radius, end_x, end_y, mpaint); canvas.restore(); } } } public void refresh(float m) { this.m = m; UNIT = 360 / this.m; invalidate(); }

}