Android 简单的折线图表绘制类： 
public class BaseFundChartView extends View {
Paint linePaint;
Paint textPaint;
Paint xyChartPaint;
Paint chartLinePaint;
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 void init() {
linePaint = new Paint();
textPaint = new Paint();
xyChartPaint = new Paint();
chartLinePaint = 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.FILL);
chartLinePaint.setStrokeWidth(3);
chartLinePaint.setColor(Color.RED);//(1)黄色
chartLinePaint.setAntiAlias(true);
}
float gridX,gridY,xSpace = 0,ySpace = 0,spaceYT = 0,yStart=0;
String[] dateX = null;
float[] dateY = null;
List<float[]> data = null;
public void setData(List<float[]> data) {
this.data = data;
invalidate();
}
public void setDateX(String[] dateX) {
this.dateX = dateX;
}
public void setDateY(float[] dateY) {
this.dateY = dateY;
}
@Override
protected void onDraw(Canvas canvas) {
super.onDraw(canvas);
//基准点。
gridX = 40;
gridY = getHeight() - 50;
//XY间隔。
if(dateX!=null&&dateX.length>0){
xSpace = (getWidth() - gridX)/dateX.length;
}
if(dateY!=null&&dateY.length>0){
ySpace = (gridY - 70)/dateY.length;
yStart = dateY[0];
if(dateY.length>2){
spaceYT = Math.abs(dateY[1]-dateY[0]);
}
}
UIUtils.log("rewqfdesa",gridY,"fdsafdsa");
//画Y轴(带箭头)。
canvas.drawLine(gridX, gridY - 20 - 10, gridX, 30 + 10, linePaint);
canvas.drawLine(gridX, 30 + 10, gridX - 6, 30 + 14 + 10, linePaint);//Y轴箭头。
canvas.drawLine(gridX, 30 + 10, gridX + 6, 30 + 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, getWidth(), y - 10, linePaint);//X轴.
canvas.drawLine(getWidth(), y - 10, getWidth() - 14, y - 6 - 10, linePaint);//X轴箭头。
canvas.drawLine(getWidth(), y - 10, getWidth() - 14, y + 6 - 10, linePaint);
//绘制X刻度坐标。
float x = 0;
if(dateX!=null){
for (int n = 0; n < dateX.length; n++) {
//取X刻度坐标.
x = gridX + (n) * xSpace;//在原点(0,0)处也画刻度（不画的话就是n+1）,向右移动一个跨度。
//画X轴具体刻度值。
if (dateX[n] != null) {
//canvas.drawLine(x, gridY - 30, x, gridY - 18, linePaint);//短X刻度。
canvas.drawText(dateX[n], x, gridY + 5, textPaint);//X具体刻度值。
}
}
}
float my = 0;
if(dateY!=null){
for(int n=0;n<dateY.length;n++){
//取Y刻度坐标.
my = gridY-30 - (n)*ySpace;
UIUtils.log(my,"fdsafss",ySpace);
//画y轴具体刻度值。
canvas.drawText(String.valueOf(dateY[n]),gridX-15,my,textPaint);
if(my != gridY-30){
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, my);//背景【虚线起点】。
path.lineTo(getWidth(), my);//背景【虚线终点】。
canvas.drawPath(path, linePaint);
}
}
}
if(data!=null&&data.size()>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<data.size();n++){
float da[] = data.get(n);
for(int m=0;m<da.length;m++){
currentPointX = m * xSpace + gridX;
currentPointY = gridY-30 - ((da[m]-yStart)*(ySpace/spaceYT));
if(m>0){
canvas.drawLine(lastPointX, lastPointY, currentPointX, currentPointY, chartLinePaint);
}
lastPointX = currentPointX;
lastPointY = currentPointY;
}
}
}
}
}
