自定义view绘制练习之饼状图

package com.zhoujian.retrofit.view;
import android.content.Context;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.Paint;
import android.graphics.RectF;
import android.support.annotation.Nullable;
import android.util.AttributeSet;
import android.view.View;

public class PieChartView extends View {
    private Paint paint;
    public PieChartView(Context context) {
        super(context);
    }
    public PieChartView(Context context, @Nullable AttributeSet attrs) {
        super(context, attrs);
    }
    public PieChartView(Context context, @Nullable AttributeSet attrs, int defStyleAttr) {
        super(context, attrs, defStyleAttr);
    }

    @Override
    protected void onDraw(Canvas canvas) {
        super.onDraw(canvas);

        paint = new Paint();
        //设置画笔颜色
        paint.setColor(Color.parseColor("#9B2FAE"));
        //设置抗锯齿
        paint.setAntiAlias(true);
        //设置画线宽度
        paint.setStrokeWidth(1);
        //设置矩形为填充模式
        paint.setStyle(Paint.Style.FILL);


        RectF rectF = new RectF(250, 100, 850, 700);
        canvas.drawArc(rectF, 0, 10, true, paint);


        //设置画笔颜色
        paint.setColor(Color.parseColor("#9E9E9E"));
        canvas.drawArc(rectF, 12, 5, true, paint);


        //设置画笔颜色
        paint.setColor(Color.parseColor("#159588"));
        canvas.drawArc(rectF, 20, 50, true, paint);


        //设置画笔颜色
        paint.setColor(Color.parseColor("#2B98F0"));
        canvas.drawArc(rectF, 74, 100, true, paint);


        //设置画笔颜色
        paint.setColor(Color.RED);
        rectF.offset(-10,-20);
        canvas.drawArc(rectF, 175, 125, true, paint);


        //设置画笔颜色
        paint.setColor(Color.YELLOW);
        rectF.offset(10,20);
        canvas.drawArc(rectF, -60, 55, true, paint);

    }
}