一、测试截图
二、实现方法
package com.xtravel.widget;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.view.View;/*** @name 自定义数据中心旅客分析变化趋势图* @Descripation <br>*1、根据用户提供的数据（两组float[]数）智能绘制数据的对比条形图。<br>*2、绘制图表信息：边框、表名、建立二维坐标系、刻度数量、刻度值、单位、网络线、图例、数据系列。<br>*3、其中Y轴的最大刻度值是用户所提供数据中float[]的最大值，分度值是最大刻度值与刻度数目的比。<br>*4、绘制用户数据对比条形图：启动线程，遍历数组值，不断在原图上刷新。<br>* @author Freedoman* @date -9-17* @version 1.0*/public class DataCenterCustomBarChart extends View {// 框架起点坐标、中心坐标、宽高private final int FRAME_X = 20;private final int FRAME_Y = 20;private final int FRAME_WIDTH = 1000;private final int FRAME_HEIGHT = 350;private final int FRAME_CENTER_X = FRAME_WIDTH / 2 + FRAME_X;private final int FRAME_CENTER_Y = FRAME_HEIGHT / 2 + FRAME_Y;// 二维坐标系原点坐标private final int ORIGIN_X = FRAME_X + 100;private final int ORIGIN_Y = FRAME_Y + FRAME_HEIGHT - 100;// XY轴终点坐标private final int XAXIS_X = FRAME_X + FRAME_WIDTH - 200;private final int XAXIS_Y = ORIGIN_Y;private final int YAXIS_X = ORIGIN_X;private final int YAXIS_Y = FRAME_Y + 50;// XY轴刻度数private int countX;private int countY;// XY轴分度值、真实数据分度值private float intervalX;private float intervalY;private float intervalPress;// 单位名称private String nameX;private String nameY;// 图表名称private String chartTitle;// 用户数据private int[] data1;private int[] data2;private int currentPosition;/*** 用户建立图表* * @param context* @param chartTitle* 表名称* @param nameXAxis* X轴单位* @param nameYAxis* Y轴单位* @param countY* Y轴刻度数目* @param thisYearWeekPerson* 用户数据* @param lastYearWeekPerson* 用户数据*/public DataCenterCustomBarChart(Context context, String chartTitle,String nameXAxis, String nameYAxis, int countY,int[] thisYearWeekPerson, int[] lastYearWeekPerson) {super(context);this.chartTitle = chartTitle;// x轴刻度数量以用户数据最大数据为依据,y轴刻度数量由用户来指定this.countX = thisYearWeekPerson.length > lastYearWeekPerson.length ? thisYearWeekPerson.length: lastYearWeekPerson.length;this.countY = countY;this.nameX = nameXAxis;this.nameY = nameYAxis;this.data1 = thisYearWeekPerson;this.data2 = lastYearWeekPerson;// 计算XY轴分度值 = 轴长/刻度数this.intervalX = (XAXIS_X - ORIGIN_X) / countX;this.intervalY = (ORIGIN_Y - YAXIS_Y) / countY;// 计算用户数据分度值 = 用户数据最大值/ 刻度数float max1 = findMaxData(thisYearWeekPerson);float max2 = findMaxData(lastYearWeekPerson);this.intervalPress = (max1 > max2 ? max1 : max2) / countY;// startDrawDynomicBar();}/*** 动态绘制任务*/public void freshDynomicBar() {final Timer timer = new Timer();TimerTask timerTask = new TimerTask() {@Overridepublic void run() {currentPosition++;postInvalidate();if (currentPosition == countX) {timer.cancel();}}};timer.schedule(timerTask, 100, 800);}/*** 绘制图表*/@SuppressLint("DrawAllocation")public void onDraw(Canvas canvas) {super.onDraw(canvas);canvas.drawColor(Color.WHITE);Paint paint = new Paint();initAXIS(canvas, paint, chartTitle);drawDynamicBar1(canvas, paint, data1);drawDynamicBar2(canvas, paint, data2);}/*** 初始化图表基本信息<br>* 表名、坐标系、刻度数量、刻度值、网络线、图例、数据系列* * @param canvas*/private void initAXIS(Canvas canvas, Paint paint, String chartTitle) {// 画边框paint.setColor(Color.GRAY);paint.setStyle(Paint.Style.STROKE);paint.setStrokeWidth(6);canvas.drawRect(FRAME_X, FRAME_Y, FRAME_WIDTH, FRAME_HEIGHT, paint);// 画坐标轴paint.setColor(Color.BLACK);paint.setStyle(Paint.Style.STROKE);paint.setStrokeWidth(5);// X轴及方向箭头canvas.drawLine(ORIGIN_X, ORIGIN_Y, XAXIS_X, XAXIS_Y, paint);canvas.drawLine(XAXIS_X, XAXIS_Y, XAXIS_X - 10, XAXIS_Y - 10, paint);canvas.drawLine(XAXIS_X, XAXIS_Y, XAXIS_X - 10, XAXIS_Y + 10, paint);// Y轴及方向箭头canvas.drawLine(ORIGIN_X, ORIGIN_Y, YAXIS_X, YAXIS_Y, paint);canvas.drawLine(YAXIS_X, YAXIS_Y, YAXIS_X - 10, YAXIS_Y + 10, paint);canvas.drawLine(YAXIS_X, YAXIS_Y, YAXIS_X + 10, YAXIS_Y + 10, paint);// 图表名称(五月第一周)paint.setColor(Color.BLACK);paint.setStyle(Paint.Style.FILL);paint.setTextSize(20);// 设置字体大小paint.setStrokeWidth(2);canvas.drawText(chartTitle, FRAME_CENTER_X - 100, FRAME_Y + 30, paint);// 绘制数据系列20*20矩形(今年、去年)paint.setColor(Color.CYAN);canvas.drawRect(FRAME_WIDTH - 100, FRAME_CENTER_Y - 30,FRAME_WIDTH - 70, FRAME_CENTER_Y, paint);canvas.drawText("今年", FRAME_WIDTH - 60, FRAME_CENTER_Y, paint);paint.setColor(Color.MAGENTA);canvas.drawRect(FRAME_WIDTH - 100, FRAME_CENTER_Y, FRAME_WIDTH - 70,FRAME_CENTER_Y + 30, paint);canvas.drawText("去年", FRAME_WIDTH - 60, FRAME_CENTER_Y + 30, paint);// 画网格线paint.setColor(Color.GRAY);paint.setStyle(Paint.Style.STROKE);paint.setStrokeWidth(2);// 横线(从x轴依次向上画)for (int i = 0; i <= countY; i++) {canvas.drawLine(ORIGIN_X, ORIGIN_Y - i * intervalY, XAXIS_X,ORIGIN_Y - i * intervalY, paint);}// 竖线(从y轴依次向右画)for (int i = 0; i <= countX; i++) {canvas.drawLine(ORIGIN_X + i * intervalX, ORIGIN_Y, ORIGIN_X + i* intervalX, YAXIS_Y, paint);}// X轴刻度值(沿X轴方向1、2、3...),轴名称paint.setColor(Color.BLUE);paint.setStyle(Paint.Style.FILL);paint.setStrokeWidth(2);paint.setTextSize(30);for (int i = 0; i <= countX; i++) {canvas.drawText("" + i, ORIGIN_X + i * intervalX, ORIGIN_Y + 50,paint);}paint.setTextSize(20);// Y轴刻度值(沿Y轴方向，用户提供的数据)轴名称for (int i = 1; i <= countY; i++) {canvas.drawText("" + (int) (i * intervalPress), ORIGIN_X - 80,ORIGIN_Y - i * intervalY + 5, paint);}paint.setTextSize(20);canvas.drawText("(" + nameX + ")", XAXIS_X + 40, XAXIS_Y + 50, paint);canvas.drawText("(" + nameY + ")", YAXIS_X - 30, YAXIS_Y - 20, paint);}/*** 绘制data1变化趋势线 <br>*/@SuppressLint("ResourceAsColor")private void drawDynamicBar1(Canvas canvas, Paint paint, int[] data) {float curRectX_data1 = ORIGIN_X + intervalX - 30;float curRectY_data1;for (int i = 1; i < currentPosition; i++, curRectX_data1 += intervalX) {// 绘制data1的动态条形paint.setColor(Color.CYAN);curRectY_data1 = data[i - 1] / intervalPress * intervalY;canvas.drawRect(curRectX_data1, ORIGIN_Y - curRectY_data1,curRectX_data1 + 30, ORIGIN_Y, paint);}}/*** 绘制data2变化趋势线*/@SuppressLint("ResourceAsColor")private void drawDynamicBar2(Canvas canvas, Paint paint, int[] data) {float curRectX_data2 = ORIGIN_X + intervalX;float curRectY_data2;for (int i = 1; i < currentPosition; i++, curRectX_data2 += intervalX) {// 绘制data2的动态条形paint.setColor(Color.MAGENTA);curRectY_data2 = data[i - 1] / intervalPress * intervalY;canvas.drawRect(curRectX_data2, ORIGIN_Y - curRectY_data2,curRectX_data2 + 30, ORIGIN_Y, paint);}}/*** 查找数组的最大值* * @param data* @return float*/private int findMaxData(int[] data) {int max = data[0];for (int i = 1; i < data.length; i++) {if (data[i] > max) {max = data[i];}}return max;}/*** 计算今年游客数相对去年的增长率* * @return float 增长率百分数*/public float getGrowthRate() {float sumYear = 0, sumLastYear = 0;for (int i = 0; i < data1.length; i++) {sumYear += data1[i];sumLastYear += data2[i];}return (sumYear - sumLastYear) / sumLastYear * 100;}/*** 统计一周总人数* * @return int 人数*/public int getSumWeek() {int sum = 0;for (int i = 0; i < data1.length; i++) {sum += data1[i];}return sum;}/*** 统计一周平均每天旅客数量* * @return int*/public int getAverageWeek() {return getSumWeek() / data1.length;}}
三、总结
