带触控的图表类，后期会把这个功能类，添加到这个框架里我自己写的一套android开发框架，有兴趣的可以下载下来看，这个框架会经常更新：
效果如下
public class BaseFundChartView extends View implements View.OnTouchListener{
Paint linePaint;
Paint textPaint;
Paint xyChartPaint;
Paint chartLinePaint;
Paint chartJianbianPaint;
Paint huodongPaint;
Paint huodongPaintText;
List points;
public BaseFundChartView(Context context, AttributeSet attrs, int defStyleAttr) {
super(context, attrs, defStyleAttr);
init();
}
public BaseFundChartView(Context context) {
this(context, null);
}
public BaseFundChartView(Context context, AttributeSet attrs) {
this(context, attrs, 0);
}
PathEffect effect;
Path path;
private float getWidthYMax(){
return getWidth()-15;
}
private void init() {
linePaint = new Paint();
textPaint = new Paint();
xyChartPaint = new Paint();
chartLinePaint = new Paint();
chartJianbianPaint = new Paint();
huodongPaint = new Paint();
huodongPaintText = new Paint();
//设置绘制模式为-虚线作为背景线。
effect = new DashPathEffect(new float[] { 6, 6, 6, 6, 6}, 2);
//背景虚线路径.
path = new Path();
//只是绘制的XY轴
linePaint.setStyle(Paint.Style.STROKE);
// linePaint.setStrokeWidth((float) 0.7);
linePaint.setStrokeWidth((float) 1.0); //设置线宽
linePaint.setColor(Color.BLACK);
linePaint.setAntiAlias(true);// 锯齿不显示
//XY刻度上的字
textPaint.setStyle(Paint.Style.FILL);// 设置非填充
textPaint.setStrokeWidth(1);// 笔宽5像素
textPaint.setColor(Color.BLACK);// 设置为蓝笔
textPaint.setAntiAlias(true);// 锯齿不显示
textPaint.setTextAlign(Paint.Align.CENTER);
textPaint.setTextSize(15);
//绘制XY轴上的字：Y开关状态、X时间
xyChartPaint.setStyle(Paint.Style.FILL);
xyChartPaint.setStrokeWidth(1);
xyChartPaint.setColor(Color.BLUE);
xyChartPaint.setAntiAlias(true);
xyChartPaint.setTextAlign(Paint.Align.CENTER);
xyChartPaint.setTextSize(18);
//绘制的折线
chartLinePaint.setStyle(Paint.Style.STROKE);
chartLinePaint.setStrokeWidth(5);
chartLinePaint.setColor(Color.BLUE);
chartLinePaint.setAntiAlias(true);
//绘制的折线
chartJianbianPaint.setStyle(Paint.Style.FILL);
chartJianbianPaint.setStrokeWidth(5);
//chartJianbianPaint.setColor(Color.YELLOW);
chartJianbianPaint.setAntiAlias(true);
huodongPaint.setStyle(Paint.Style.STROKE);
huodongPaint.setStrokeWidth((float) 3.0); //设置线宽
huodongPaint.setColor(Color.GRAY);
huodongPaint.setAntiAlias(true);// 锯齿不显示
huodongPaintText.setStyle(Paint.Style.STROKE);
huodongPaintText.setStrokeWidth((float) 2.0); //设置线宽
huodongPaintText.setTextSize(40);
huodongPaintText.setColor(Color.GRAY);
huodongPaintText.setAntiAlias(true);// 锯齿不显示
setOnTouchListener(this);
}
/**
* 重要参数，两点之间分为几段描画，数字愈大分段越多，描画的曲线就越精细.
*/
private static final int STEPS = 12;
float gridX,gridY,xSpace = 0,ySpace = 0,spaceYT = 0;
Float yStart=null,yStop = null;
Integer yCount = null;
List text = null;
public void setText(List text) {
this.text = text;
}
public void setyCount(Integer yCount) {
this.yCount = yCount;
}
public void setyStart(Float yStart) {
this.yStart = yStart;
}
public void setyStop(Float yStop) {
this.yStop = yStop;
}
String yFormat=null;
public void setFormat(String yFormat){
this.yFormat = yFormat;
}
List dateX = null;
List dateY = null;
List> data = null;
List colors = null;
public void setColors(List colors) {
this.colors = colors;
}
public List getDateY() {
return dateY;
}
public void setDateY(List dateY) {
this.dateY = dateY;
}
public List> getData() {
return data;
}
public void setData(List> data) {
this.data = data;
}
public List getDateX() {
return dateX;
}
public void setDateX(List dateX) {
this.dateX = dateX;
}
@Override
protected void onDraw(Canvas canvas) {
super.onDraw(canvas);
//基准点。
gridX = 40;
gridY = getHeight() - 50;
//XY间隔。
if(dateX!=null&&dateX.size()>0){
xSpace = (getWidthYMax() - gridX)/dateX.size();
}
/**
* 如果设置开头和结尾的话，就直接生成y轴
*/
if(yStart!=null&&yStop!=null&&yCount!=null){
dateY = new ArrayList();
ySpace = (gridY - 70)/yCount;
float ze = (yStop-yStart)/yCount;
for(int i=0;i2){
spaceYT = dateY.get(1)-dateY.get(0);
}
}else{
if(dateY!=null&&dateY.size()>0){
ySpace = (gridY - 70)/dateY.size();
yStart = dateY.get(0);
if(dateY.size()>2){
spaceYT = dateY.get(1)-dateY.get(0);
}
}
}
UIUtils.log("rewqfdesa",gridY,"fdsafdsa");
//画Y轴(带箭头)。
canvas.drawLine(gridX, gridY - 20 - 10, gridX, 10, linePaint);
canvas.drawLine(gridX, 10, gridX - 6, 14 + 10, linePaint);//Y轴箭头。
canvas.drawLine(gridX, 10, gridX + 6, 14 + 10, linePaint);
//画Y轴名字。
//由于是竖直显示的，先以原点顺时针旋转90度后为新的坐标系
//canvas.rotate(-90);
//当xyChartPaint的setTextAlign（）设置为center时第二、三个参数代表这四个字中点所在的xy坐标
//canvas.drawText("开关状态", -((float) (getHeight() - 60) - 15 - 5 - 1 / ((float) 1.6 * 1) * (getHeight() - 60) / 2), gridX - 15, xyChartPaint);
//绘制Y轴坐标
//canvas.rotate(90); //改变了坐标系还要再改过来
float y = 0;
//画X轴。
y = gridY - 20;
canvas.drawLine(gridX, y - 10, getWidthYMax(), y - 10, linePaint);//X轴.
canvas.drawLine(getWidthYMax(), y - 10, getWidthYMax() - 14, y - 6 - 10, linePaint);//X轴箭头。
canvas.drawLine(getWidthYMax(), y - 10, getWidthYMax() - 14, y + 6 - 10, linePaint);
//绘制X刻度坐标。
float x = 0;
if(dateX!=null){
for (int n = 0; n 0){
float lastPointX = 0; //前一个点
float lastPointY = 0;
float currentPointX = 0;//当前点
float currentPointY = 0;
for(int n=0;n da = data.get(n);
List da_x = new ArrayList();
List da_y = new ArrayList();
/**
* 曲线路劲
*/
Path curvePath = new Path();
/**
* 渐变色路径
*/
Path jianBianPath = new Path();
for(int m=0;m0){
// canvas.drawLine(lastPointX, lastPointY, currentPointX, currentPointY, chartLinePaint);
// }
// lastPointX = currentPointX;
// lastPointY = currentPointY;
}
List calculate_y = calculate(da_y);
List calculate_x = calculate(da_x);
curvePath.moveTo(calculate_x.get(0).eval(0), calculate_y.get(0).eval(0));
jianBianPath.moveTo(gridX,gridY - 20 - 10);
jianBianPath.lineTo(calculate_x.get(0).eval(0), calculate_y.get(0).eval(0));
chartLinePaint.setColor(colors.get(n));
float lastx = 0;
for (int i = 0; i 0){
Paint.FontMetrics metrics = huodongPaintText.getFontMetrics();
float top = metrics.top;
float bootom = metrics.bottom;
float h = bootom-top;
float th = h + h*text.size();
float w=0;
float fx = 1;
if(lineX>getWidth()/2){
fx = -1;
}else{
fx = 1;
}
for(int i=0;iw){
w = width;
}
canvas.drawText(text.get(i),fx==1?lineX+10:lineX-10-width,40+ h*(i+1),huodongPaintText);
}
canvas.drawLine(lineX, gridY - 20 - 10, lineX, 30 + 10, huodongPaint);
//canvas.drawRect(lineX,40,lineX+w*fx+20*fx,40+th,huodongPaint);
}
}
// //起始点。
// float lastPointX = 0; //前一个点
// float lastPointY = 0;
// float currentPointX = 0;//当前点
// float currentPointY = 0;
// if (dateY != null) {
// //1.绘制折线。
// for (int n = 0; n 0) {//从第二个点开始判断
// if (dateY[n - 1] == dateY[n]) {//如果相邻两个点相等一直画直线
// //draw line
// canvas.drawLine(lastPointX, lastPointY, currentPointX, currentPointY, chartLinePaint);//第一条线[蓝色]
// } else {//如果相邻间的点不相等证明是从开到关或者关到开的状态，要画竖线
// //draw line 横线
// canvas.drawLine(lastPointX, lastPointY, currentPointX, lastPointY, chartLinePaint);//第一条线[蓝色]
// //draw line 竖线
// canvas.drawLine(currentPointX, lastPointY, currentPointX, currentPointY, chartLinePaint);//第一条线[蓝色]
// }
// }
// }
//
// lastPointX = currentPointX;
// lastPointY = currentPointY;
// }
// }
//画背景虚线，一条(因为除去了X轴)，画Y轴刻度
// y = (float) (getHeight() - 60) - 15 - 5 - 1 / ((float) 1.6 * 1) * (getHeight() - 60);//虚线的Y，开关是开的时候的Y。
// linePaint.setPathEffect(effect);//设法虚线间隔样式。
// //画除X轴之外的------背景虚线一条-------
// path.moveTo(gridX, y);//背景【虚线起点】。
// path.lineTo(getWidth(), y);//背景【虚线终点】。
// canvas.drawPath(path, linePaint);
// //画Y轴刻度。
// canvas.drawText("关", gridX - 6 - 7, gridY - 20, textPaint);
// canvas.drawText("开", gridX - 6 - 7, y + 10, textPaint);
//
// //绘制X刻度坐标。
// float x = 0;
// if (dateX[0] != null) { //用X来判断，就是用来如果刚开始的点数少于7个则从左到右递增，从而没有了刚开始的几个虚点；（因为X和Y的数组初始化时都没赋值，所以刚开始的时候用这个就可以判断数组中到底几个点）
// for (int n = 0; n 0) {//从第二个点开始判断
// if (dateY[n - 1] == dateY[n]) {//如果相邻两个点相等一直画直线
// //draw line
// canvas.drawLine(lastPointX, lastPointY, currentPointX, currentPointY, chartLinePaint);//第一条线[蓝色]
// } else {//如果相邻间的点不相等证明是从开到关或者关到开的状态，要画竖线
// //draw line 横线
// canvas.drawLine(lastPointX, lastPointY, currentPointX, lastPointY, chartLinePaint);//第一条线[蓝色]
// //draw line 竖线
// canvas.drawLine(currentPointX, lastPointY, currentPointX, currentPointY, chartLinePaint);//第一条线[蓝色]
// }
// }
// }
//
// lastPointX = currentPointX;
// lastPointY = currentPointY;
// }
// }
// //画X轴名字。
// canvas.drawText("时间", getWidth() / 2 - 10, getHeight() - 18, xyChartPaint);
}
// /**
// * 画点.
// *
// * @param canvas
// */
// private void drawPoints(Canvas canvas) {
// for (int i = 0; i calculate(List x) {
int n = x.size() - 1;
float[] gamma = new float[n + 1];
float[] delta = new float[n + 1];
float[] D = new float[n + 1];
int i;
/*
* We solve the equation [2 1 ] [D[0]] [3(x[1] - x[0]) ] |1 4 1 | |D[1]|
* |3(x[2] - x[0]) | | 1 4 1 | | . | = | . | | ..... | | . | | . | | 1 4
* 1| | . | |3(x[n] - x[n-2])| [ 1 2] [D[n]] [3(x[n] - x[n-1])]
*
* by using row operations to convert the matrix to upper triangular and
* then back sustitution. The D[i] are the derivatives at the knots.
*/
gamma[0] = 1.0f / 2.0f;
for (i = 1; i = 0; i--) {
D[i] = delta[i] - gamma[i] * D[i + 1];
}
/* now compute the coefficients of the cubics */
List cubics = new LinkedList();
for (i = 0; i 0&&zhi0&&fanwei&&event.getX()
来自 “ ITPUB博客 ” ，链接：https://blog.itpub.net/2751/viewspace-2798074/ ，如需转载，请注明出处，否则将追究法律责任。
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