android自定义环形统计图动画

本文实例为大家分享了android自定义环形统计图动画的具体代码，供大家参考，具体内容如下

一、测试截图

二、实现原理 

package com.freedomanlib;
 
import java.util.timer;
import java.util.timertask;
 
import android.annotation.suppresslint;
import android.content.context;
import android.graphics.canvas;
import android.graphics.color;
import android.graphics.paint;
import android.graphics.rectf;
import android.graphics.typeface;
import android.util.attributeset;
import android.util.log;
import android.view.motionevent;
import android.view.view;
 
/**
 * @name 自定义车辆数据统计比重环
 *    1、比重环由底环（灰色）、里程环（红色）、平均速度环（黄色）、行驶时间环（蓝色）、超速次数环（绿色）、环中间评级、指示器组成
 *    ，其中四个数据统计环和底环是同心圆、圆心处有评分文本，圆环外是四个统计指示器。<br>
 *    2、四个统计环是四个弧线，弧度由外界提供数据，并动态显示在界面上。<br>
 *    3、评分等级分为三种：未评分、正在评分、评分完成，当用户点击中间区域时开启评分，评分结束自动停止。<br>
 *    4、外侧对应的四个指示器上结构上包括：指示器位置的小圆圈、折线连接线、指示文本、文本数据显示具体的数值。<br>
 * 
 * @author freedoman
 * @date 2014-10-27
 */
public class cirstatisticgraph extends view {
 
 private static final string tag = "cirstatisticgraph";
 
 /**
 * @name centerpoint
 * @descripation 中心点<br>
 */
 class centerpoint {
 float x;
 float y;
 }
 
 /**
 * 边界宽高、中心坐标、外环和内环半径
 */
 private float boundswidth;
 private float boundsheigh;
 private centerpoint centerpoint = new centerpoint();
 private float radius;
 private float paintwidth;
 private float genpaintwidth;
 
 /**
 * 几种不同的画笔
 */
 private paint defaultpaint;
 private paint genpaint;
 private paint progresstextpaint;
 private paint flagpaint;
 
 /**
 * 进度
 */
 private int curprogress;
 private int targetprogress = 88;
 private boolean complete;
 
 private int mileage = 128;
 private int averagespeed = 78;
 private float gotime = 1.5f;
 private int overspeedcount = 3;
 
 /**
 * 构造
 * 
 * @param context
 */
 public cirstatisticgraph(context context) {
 this(context, null);
 }
 
 public cirstatisticgraph(context context, attributeset attrs) {
 super(context, attrs, 0);
 }
 
 public cirstatisticgraph(context context, attributeset attrs, int defstyle) {
 super(context, attrs, defstyle);
 this.initialize();
 }
 
 /**
 * 初始化
 */
 private void initialize() {
 
 // 底环画笔
 defaultpaint = new paint();
 defaultpaint.setcolor(color.argb(0xee, 0x8e, 0x8e, 0x8e));
 defaultpaint.setstyle(paint.style.stroke);
 defaultpaint.setstrokewidth(paintwidth);
 defaultpaint.setantialias(true);
 
 // 比重环画笔
 genpaint = new paint();
 genpaint.setstyle(paint.style.stroke);
 genpaint.setstrokewidth(genpaintwidth);
 genpaint.setantialias(true);
 
 // 中心进度文本和评级画笔
 progresstextpaint = new paint();
 progresstextpaint.setcolor(color.white);
 progresstextpaint.setstyle(paint.style.stroke);
 progresstextpaint.setstrokewidth(0);
 progresstextpaint.settypeface(typeface.default_bold);
 
 // 指示器画笔
 flagpaint = new paint();
 flagpaint.setcolor(color.white);
 flagpaint.setstyle(paint.style.stroke);
 flagpaint.setstrokewidth(3);
 flagpaint.setantialias(true);
 }
 
 @override
 protected void onmeasure(int widthmeasurespec, int heightmeasurespec) {
 super.onmeasure(widthmeasurespec, heightmeasurespec);
 
 // 绘制区域的宽高
 boundswidth = getwidth();
 boundsheigh = getheight();
 centerpoint.x = boundswidth / 2;
 centerpoint.y = boundsheigh / 2;
 
 radius = boundsheigh * 1 / 3;
 paintwidth = 50;
 genpaintwidth = paintwidth / 7;
 initialize();
 }
 
 /**
 * 启动进度动画
 */
 public void start() {
 curprogress = 0;
 if (targetprogress == 0) {
 targetprogress = 88;
 }
 final timer timer = new timer();
 timertask timertask = new timertask() {
 @override
 public void run() {
 curprogress++;
 if (curprogress == targetprogress) {
  timer.cancel();
 }
 postinvalidate();
 }
 };
 timer.schedule(timertask, 0, 20);
 }
 
 @suppresslint("drawallocation")
 @override
 public void ondraw(canvas canvas) {
 super.ondraw(canvas);
 
 // 底环（灰色）
 canvas.drawcircle(centerpoint.x, centerpoint.y, radius, defaultpaint);
 
 // 很重要的一个半径(最外层环即里程环的半径)
 float sroundradius = radius + paintwidth / 2 - genpaintwidth / 2;
 
 // 里程比重环（红色）
 genpaint.setcolor(color.argb(0xee, 0xff, 0x35, 0x9a));
 rectf oval1 = new rectf(centerpoint.x - sroundradius, centerpoint.y
 - sroundradius, centerpoint.x + sroundradius, centerpoint.y
 + sroundradius);
 canvas.drawarc(oval1, -90, 300, false, genpaint);
 
 // 里程比重环的指示器位置（勾股定理计算坐标）
 float temp = sroundradius;
 float relativepoint = (float) math.sqrt(temp * temp / 2);
 canvas.drawcircle(centerpoint.x - relativepoint, centerpoint.y
 - relativepoint, radius / 12, flagpaint);
 // 连线
 float[] pts1 = new float[8];
 pts1[0] = centerpoint.x - relativepoint - radius / 24;
 pts1[1] = centerpoint.y - relativepoint - radius / 24;
 pts1[2] = centerpoint.x - relativepoint - 80;
 pts1[3] = centerpoint.y - relativepoint - 40;
 
 pts1[4] = pts1[2];
 pts1[5] = pts1[3];
 pts1[6] = pts1[4] - 50;
 pts1[7] = pts1[5];
 canvas.drawlines(pts1, flagpaint);
 
 // 文本
 progresstextpaint.settextsize(30);
 string txt = "里程";
 float wt = progresstextpaint.measuretext(txt);
 canvas.drawtext(txt, pts1[6] - wt - 10, pts1[7] + 15, progresstextpaint);
 if (complete) {
 canvas.drawtext(mileage + "km", pts1[6] - wt - 10, pts1[7] + 50,
  progresstextpaint);
 }
 
 // 平均速度环（黄色）
 genpaint.setcolor(color.argb(0xee, 0xf7, 0x50, 0x00));
 rectf oval2 = new rectf(centerpoint.x - sroundradius + 2
 * genpaintwidth, centerpoint.y - sroundradius + 2
 * genpaintwidth, centerpoint.x + sroundradius - 2
 * genpaintwidth, centerpoint.y + sroundradius - 2
 * genpaintwidth);
 canvas.drawarc(oval2, 0, 280, false, genpaint);
 
 // 平均速度环的指示器位置
 temp = sroundradius - 2 * genpaintwidth;
 relativepoint = (float) math.sqrt(temp * temp / 2);
 canvas.drawcircle(centerpoint.x + relativepoint, centerpoint.y
 - relativepoint, radius / 12, flagpaint);
 
 // 连接线
 pts1 = new float[8];
 pts1[0] = centerpoint.x + relativepoint + radius / 24;
 pts1[1] = centerpoint.y - relativepoint - radius / 24;
 pts1[2] = centerpoint.x + relativepoint + 80;
 pts1[3] = centerpoint.y - relativepoint - 40;
 
 pts1[4] = pts1[2];
 pts1[5] = pts1[3];
 pts1[6] = pts1[4] + 50;
 pts1[7] = pts1[5];
 canvas.drawlines(pts1, flagpaint);
 
 // 文本
 txt = "平均速度";
 wt = progresstextpaint.measuretext(txt);
 canvas.drawtext(txt, pts1[6] + 10, pts1[7] + 15, progresstextpaint);
 if (complete) {
 canvas.drawtext(averagespeed + "km/h", pts1[6] + 10, pts1[7] + 50,
  progresstextpaint);
 }
 
 // 行驶时间环（蓝色）和指示
 genpaint.setcolor(color.argb(0xee, 0x00, 0x72, 0xe3));
 rectf oval3 = new rectf(centerpoint.x - sroundradius + 4
 * genpaintwidth, centerpoint.y - sroundradius + 4
 * genpaintwidth, centerpoint.x + sroundradius - 4
 * genpaintwidth, centerpoint.y + sroundradius - 4
 * genpaintwidth);
 canvas.drawarc(oval3, 90, 270, false, genpaint);
 
 // 行驶时间环指示器的位置
 temp = sroundradius - 4 * genpaintwidth;
 relativepoint = (float) math.sqrt(temp * temp / 2);
 canvas.drawcircle(centerpoint.x - relativepoint, centerpoint.y
 + relativepoint, radius / 12, flagpaint);
 
 // 连接线和文本
 pts1 = new float[8];
 pts1[0] = centerpoint.x - relativepoint - radius / 24;
 pts1[1] = centerpoint.y + relativepoint + radius / 24;
 pts1[2] = centerpoint.x - relativepoint - 80;
 pts1[3] = centerpoint.y + relativepoint + 40;
 
 pts1[4] = pts1[2];
 pts1[5] = pts1[3];
 pts1[6] = pts1[4] - 50;
 pts1[7] = pts1[5];
 canvas.drawlines(pts1, flagpaint);
 
 txt = "行驶时间";
 wt = progresstextpaint.measuretext(txt);
 canvas.drawtext(txt, pts1[6] - wt - 10, pts1[7] + 15, progresstextpaint);
 if (complete) {
 canvas.drawtext(gotime + "h", pts1[6] - wt - 10, pts1[7] - 20,
  progresstextpaint);
 }
 
 // 超速次数环（绿色）
 genpaint.setcolor(color.argb(0xee, 0x00, 0xec, 0x00));
 rectf oval4 = new rectf(centerpoint.x - sroundradius + 6
 * genpaintwidth, centerpoint.y - sroundradius + 6
 * genpaintwidth, centerpoint.x + sroundradius - 6
 * genpaintwidth, centerpoint.y + sroundradius - 6
 * genpaintwidth);
 canvas.drawarc(oval4, 0, 290, false, genpaint);
 
 // 超速次数环指示器的位置
 temp = sroundradius - 6 * genpaintwidth;
 relativepoint = (float) math.sqrt(temp * temp / 2);
 canvas.drawcircle(centerpoint.x + relativepoint, centerpoint.y
 + relativepoint, radius / 12, flagpaint);
 
 // 连接线
 pts1 = new float[8];
 pts1[0] = centerpoint.x + relativepoint + radius / 24;
 pts1[1] = centerpoint.y + relativepoint + radius / 24;
 pts1[2] = centerpoint.x + relativepoint + 80;
 pts1[3] = centerpoint.y + relativepoint + 40;
 
 pts1[4] = pts1[2];
 pts1[5] = pts1[3];
 pts1[6] = pts1[4] + 50;
 pts1[7] = pts1[5];
 canvas.drawlines(pts1, flagpaint);
 
 // 文本
 txt = "超速次数";
 wt = progresstextpaint.measuretext(txt);
 canvas.drawtext(txt, pts1[6] + 10, pts1[7] + 15, progresstextpaint);
 if (complete) {
 canvas.drawtext(overspeedcount + "次", pts1[6] + 10, pts1[7] - 20,
  progresstextpaint);
 }
 
 // 环中心进度文本（动态迭加的）
 int curpercent = curprogress;
 progresstextpaint.settextsize(60);
 float ww = progresstextpaint.measuretext(curpercent + "%");
 canvas.drawtext(curpercent + "%", centerpoint.x - ww / 2,
 centerpoint.y, progresstextpaint);
 
 // 评级提示
 progresstextpaint.settextsize(25);
 float w = 0;
 string text = "";
 if (curpercent == 0) {
 // 暂未评级
 text = "暂未评级";
 w = progresstextpaint.measuretext(text);
 complete = false;
 } else if (curpercent < targetprogress) {
 // 评级中...
 text = "评级中...";
 w = progresstextpaint.measuretext(text);
 } else if (curpercent == targetprogress) {
 // 评级完成
 text = "评级完成";
 w = progresstextpaint.measuretext(text);
 complete = true;
 postinvalidate();
 }
 canvas.drawtext(text, centerpoint.x - w / 2, centerpoint.y + 40,
 progresstextpaint);
 
 }
 
 /**
 * 点击评分区域，进行评分
 * 
 * @param event
 * @return
 */
 @override
 public boolean ontouchevent(motionevent event) {
 
 float x = event.getx();
 float y = event.gety();
 
 if (x > centerpoint.x - radius && x < centerpoint.x + radius
 && y > centerpoint.y - radius && y < centerpoint.y + radius) {
 log.i(tag, ">>>");
 start();
 }
 return super.ontouchevent(event);
 }
 
}

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