Android 自定义六边形进度条

最近公司项目中冒出个六边形的进度条，当时看到有点蒙，和大多数人一样不知道从哪开始写，于是和大多数人一样抱着学习的态度百度了一番，但并没有具体的实例。但是，也不是没收获。在网上找到一篇圆形进度条的案例，我想既然有圆形的，六边形的我也可以做啊！不就是模仿么！于是开始了阅读代码，链接是:http://blog.csdn.net/xiaanming/article/details/10298163。第一次写博客所以我就直接贴代码了，代码中的注释很详细，我就不过多解释了。
效果图如下：


主要代码：

package com.sxc.hexagonprogress;

import java.util.Random;
import android.content.Context;
import android.content.res.ColorStateList;
import android.content.res.Resources;
import android.content.res.TypedArray;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.Paint;
import android.graphics.PaintFlagsDrawFilter;
import android.graphics.Path;
import android.graphics.RectF;
import android.graphics.Typeface;
import android.util.AttributeSet;
import android.util.Log;
import android.view.View;


/**
 * 六边形带进度的进度条，线程安全的View，可直接在线程中更新进度
 * 
 * @author sunxunchao
 *
 */
public class HexagonProgress extends View {
    /**
     * 画笔对象的引用
     */
    private Paint paint, mPaint;

    /**
     * 画笔路径
     */
    private Path path, mPath;

    /**
     * 环的颜色
     */
    private int roundColor;

    /**
     * 环进度的颜色
     */
    private int roundProgressColor;

    /**
     * 中间进度百分比的字符串的颜色
     */
    private int textColor;

    /**
     * 中间进度百分比的字符串的字体
     */
    private float textSize;

    /**
     * 环的宽度
     */
    private float roundWidth;

    /**
     * 最大进度
     */
    private double max;

    /**
     * 当前进度
     */
    private double progress;
    /**
     * 是否显示中间的进度
     */
    private boolean textIsDisplayable;

    /**
     * 进度的风格，实心或者空心
     */
    private int style;

    public static final int STROKE = 0;
    public static final int FILL = 1;

    public HexagonProgress(Context context) {
        this(context, null);
    }

    public HexagonProgress(Context context, AttributeSet attrs) {
        this(context, attrs, 0);
    }

    public HexagonProgress(Context context, AttributeSet attrs, int defStyle) {
        super(context, attrs, defStyle);

        paint = new Paint();
        mPaint = new Paint();

        TypedArray mTypedArray = context.obtainStyledAttributes(attrs,
                R.styleable.HexagonProgressBar);

        // 获取自定义属性和默认值
        roundColor = mTypedArray.getColor(
                R.styleable.HexagonProgressBar_hexagonColor, Color.RED);
        roundProgressColor = mTypedArray.getColor(
                R.styleable.HexagonProgressBar_hexagonProgressColor, Color.GREEN);
        textColor = mTypedArray.getColor(
                R.styleable.HexagonProgressBar_textColor, Color.GREEN);
        textSize = mTypedArray.getDimension(
                R.styleable.HexagonProgressBar_textSize, 15);
        roundWidth = mTypedArray.getDimension(
                R.styleable.HexagonProgressBar_hexagonWidth, 5);
        max = mTypedArray.getInteger(R.styleable.HexagonProgressBar_max, 100);
        textIsDisplayable = mTypedArray.getBoolean(
                R.styleable.HexagonProgressBar_textIsDisplayable, true);

        mTypedArray.recycle();
    }

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

        /**
         * 画外六边形
         */
        int centre = getWidth() / 2;// 中心坐标
        int radius = (int) (centre - roundWidth / 2);// 六边形边长
        mPaint.setColor(roundColor); // 设置圆环的颜色
        mPaint.setStyle(Paint.Style.STROKE); // 设置空心
        mPaint.setStrokeWidth(roundWidth); // 设置圆环的宽度
        mPaint.setAntiAlias(true); // 消除锯齿
        mPath = new Path();//设置路径
        // 第一个点坐标(centre-radius, getHeight()/2)
        // 第二个点坐标(centre-radius/2,getHeight()/2-Math.sqrt(3)*radius/2)
        // 第三个点坐标(centre+radius/2,getHeight()/2-Math.sqrt(3)*radius/2)
        // 第四个点坐标(centre+radius,getHeight()/2)
        // 第五个点坐标 (centre+radius/2,Math.sqrt(3)*radius/2+getHeight()/2)
        // 第六个点坐标 (centre-radius/2,Math.sqrt(3)*radius/2+getHeight()/2)
        mPath.moveTo(centre - radius, centre); // A
        mPath.lineTo(centre - radius / 2, (float) (centre - Math.sqrt(3)* radius / 2));// B
        mPath.lineTo(centre + radius / 2, (float) (centre - Math.sqrt(3)* radius / 2));// C
        mPath.lineTo(centre + radius, centre);// D
        mPath.lineTo(centre + radius / 2,(float) ((Math.sqrt(3) * radius / 2) + centre));// E
        mPath.lineTo(centre - radius / 2,(float) ((Math.sqrt(3) * radius / 2) + centre));// F
        mPath.close();
        canvas.drawPath(mPath, mPaint);

        /**
         * 画进度百分比
         */
        mPaint.setStrokeWidth(0);
        mPaint.setColor(textColor);
        mPaint.setTextSize(textSize);
        mPaint.setTypeface(Typeface.DEFAULT_BOLD); // 设置字体
        int percent = (int) (((float) progress / (float) max) * 100); // 中间的进度百分比，先转换成float在进行除法运算，不然都为0
        float textWidth = mPaint.measureText(percent + "%"); // 测量字体宽度，我们需要根据字体的宽度设置在圆环中间

        if (textIsDisplayable && style == STROKE) {
            canvas.drawText(percent + "%", centre - textWidth / 2, centre
                    + textSize / 2, mPaint); // 画出进度百分比
        }

        /**
         * 画六边形进度
         */

        path = new Path();
        paint.setStrokeWidth(roundWidth); // 设置圆环的宽度
        paint.setColor(roundProgressColor); // 设置进度的颜色
        paint.setAntiAlias(true);

        double k=  (progress*6) / max;

        paint.setStyle(Paint.Style.STROKE);
            if (k <= 1|| k==0) {
                path.moveTo(centre + radius, centre);
                path.lineTo((float)(centre+radius-k*radius/2), (float) (centre+k*radius*Math.sqrt(3)/2));
            } 
            else if (k>1&&k<=2) {
                path.moveTo(centre + radius, centre); 
                path.lineTo(centre + radius / 2, (float) ((Math.sqrt(3) * radius / 2) + centre));
                path.lineTo((float) (centre+1.5*radius-k*radius), (float) (centre+0.5*Math.sqrt(3)*radius));
            }else if (k>2&&k<=3) {
                path.moveTo(centre + radius, centre); 
                path.lineTo(centre + radius / 2, (float) ((Math.sqrt(3) * radius / 2) + centre));
                path.lineTo(centre - radius / 2, (float) ((Math.sqrt(3) * radius / 2) + centre));
                path.lineTo((float)(centre+0.5*radius-0.5*radius*k), (float) (centre+1.5*Math.sqrt(3)*radius-0.5*k*radius*Math.sqrt(3)));
            }else if (k>3&&k<=4) {
                path.moveTo(centre + radius, centre); 
                path.lineTo(centre + radius / 2, (float) ((Math.sqrt(3) * radius / 2) + centre));
                path.lineTo(centre - radius / 2, (float) ((Math.sqrt(3) * radius / 2) + centre));
                path.lineTo(centre-radius, centre);
                path.lineTo((float)(centre-radius+0.5*k*radius-1.5*radius), (float) (centre-0.5*(k-3)*radius*Math.sqrt(3)));
            }else if (k>4&&k<=5) {
                path.moveTo(centre + radius, centre); 
                path.lineTo(centre + radius / 2, (float) ((Math.sqrt(3) * radius / 2) + centre));
                path.lineTo(centre - radius / 2, (float) ((Math.sqrt(3) * radius / 2) + centre));
                path.lineTo(centre - radius, centre);
                path.lineTo(centre - radius / 2, (float) (centre - Math.sqrt(3)* radius / 2));
                path.lineTo((float) ((k-4)*radius+centre-0.5*radius),(float) (centre - Math.sqrt(3)* radius / 2));
            }else if (k>5&&k<6) {
                path.moveTo(centre + radius, centre); 
                path.lineTo(centre + radius / 2, (float) ((Math.sqrt(3) * radius / 2) + centre));
                path.lineTo(centre - radius / 2, (float) ((Math.sqrt(3) * radius / 2) + centre));
                path.lineTo(centre - radius, centre);
                path.lineTo(centre - radius / 2, (float) (centre - Math.sqrt(3)* radius / 2));
                path.lineTo(centre + radius / 2,(float) (centre - Math.sqrt(3)* radius / 2));
                path.lineTo((float)(centre+0.5*radius+0.5*(k-5)*radius),(float) (centre-0.5*Math.sqrt(3)*radius+0.5*Math.sqrt(3)*(k-5)*radius));
            }else {
                path.moveTo(centre + radius, centre); 
                path.lineTo(centre + radius / 2, (float) ((Math.sqrt(3) * radius / 2) + centre));
                path.lineTo(centre - radius / 2, (float) ((Math.sqrt(3) * radius / 2) + centre));
                path.lineTo(centre - radius, centre);
                path.lineTo(centre - radius / 2, (float) (centre - Math.sqrt(3)* radius / 2));
                path.lineTo(centre + radius / 2,(float) (centre - Math.sqrt(3)* radius / 2));
                path.lineTo(centre + radius , centre);
                path.close();
            }

            canvas.drawPath(path, paint);

    }

    public synchronized double getMax() {
        return max;
    }

    /**
     * 设置进度的最大值
     * 
     * @param max
     */
    public synchronized void setMax(int max) {
        if (max < 0) {
            throw new IllegalArgumentException("max not less than 0");
        }
        this.max = max;
    }

    /**
     * 获取进度.需要同步
     * 
     * @return
     */
    public synchronized double getProgress() {
        return progress;
    }

    /**
     * 设置进度，此为线程安全控件，由于考虑多线的问题，需要同步 刷新界面调用postInvalidate()能在非UI线程刷新
     * 
     * @param progress
     */
    public synchronized void setProgress(double progress) {
        if (progress < 0) {
            throw new IllegalArgumentException("progress not less than 0");
        }
        if (progress > max) {
            progress = max;
        }
        if (progress <= max) {
            this.progress = progress;
            postInvalidate();
        }

    }

    public int getCricleColor() {
        return roundColor;
    }

    public void setCricleColor(int cricleColor) {
        this.roundColor = cricleColor;
    }

    public int getCricleProgressColor() {
        return roundProgressColor;
    }

    public void setCricleProgressColor(int cricleProgressColor) {
        this.roundProgressColor = cricleProgressColor;
    }

    public int getTextColor() {
        return textColor;
    }

    public void setTextColor(int textColor) {
        this.textColor = textColor;
    }

    public float getTextSize() {
        return textSize;
    }

    public void setTextSize(float textSize) {
        this.textSize = textSize;
    }

    public float getRoundWidth() {
        return roundWidth;
    }

    public void setRoundWidth(float roundWidth) {
        this.roundWidth = roundWidth;
    }

}

在values中新建一个attrs.xml文件：

<?xml version="1.0" encoding="UTF-8"?>
<resources>
    <declare-styleable name="HexagonProgressBar">  
        <attr name="hexagonColor" format="color"/>
        <attr name="hexagonProgressColor" format="color"/>
        <attr name="hexagonWidth" format="dimension"></attr>
        <attr name="textColor" format="color" />  
        <attr name="textSize" format="dimension" /> 
        <attr name="max" format="integer"></attr> 
        <attr name="textIsDisplayable" format="boolean"></attr>
        <!-- <attr name="style">
            <enum name="STROKE" value="0"></enum>
            <enum name="FILL" value="1"></enum>
        </attr> -->
    </declare-styleable> 
</resources>

代码链接：http://download.csdn.net/detail/jackeysun6032/9042281
感谢各位支持：http://blog.csdn.net/jackeysun6032/article/details/47952789