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);
}

}

来源：https://blog.csdn.net/oFanJunBin/article/details/40787929