本文实例讲述了Android自定义圆形进度条，分享给大家供大家参考。具体如下：

大家也可以参考这两篇文章进行学习： 《自定义Android圆形进度条(附源码)》   《Android带进度的圆形进度条》

运行效果截图如下：

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>

项目免费下载： 《Android六边形进度条》

希望本文所述对大家学习Android软件编程有所帮助。