GraphView/GraphView.java at master · arnodenhond/GraphView · GitHub

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packagearnodenhond.graphviewdemo;

importandroid.content.Context;
importandroid.graphics.Canvas;
importandroid.graphics.Color;
importandroid.graphics.Paint;
importandroid.graphics.Paint.Align;
importandroid.view.View;

/**
 * GraphView creates a scaled line or bar graph with x and y axis labels.
 * @author Arno den Hond
 *
 */
publicclassGraphViewextendsView {

publicstaticbooleanBAR = true;
publicstaticbooleanLINE = false;

privatePaintpaint;
privatefloat[] values;
privateString[] horlabels;
privateString[] verlabels;
privateStringtitle;
privatebooleantype;

publicGraphView(Contextcontext, float[] values, Stringtitle, String[] horlabels, String[] verlabels, booleantype) {
super(context);
if (values == null)
values = newfloat[0];
else
this.values = values;
if (title == null)
title = "";
else
this.title = title;
if (horlabels == null)
this.horlabels = newString[0];
else
this.horlabels = horlabels;
if (verlabels == null)
this.verlabels = newString[0];
else
this.verlabels = verlabels;
this.type = type;
paint = newPaint();
	}

@Override
protectedvoidonDraw(Canvascanvas) {
floatborder = 20;
floathorstart = border * 2;
floatheight = getHeight();
floatwidth = getWidth() - 1;
floatmax = getMax();
floatmin = getMin();
floatdiff = max - min;
floatgraphheight = height - (2 * border);
floatgraphwidth = width - (2 * border);

paint.setTextAlign(Align.LEFT);
intvers = verlabels.length - 1;
for (inti = 0; i < verlabels.length; i++) {
paint.setColor(Color.DKGRAY);
floaty = ((graphheight / vers) * i) + border;
canvas.drawLine(horstart, y, width, y, paint);
paint.setColor(Color.WHITE);
canvas.drawText(verlabels[i], 0, y, paint);
 }
inthors = horlabels.length - 1;
for (inti = 0; i < horlabels.length; i++) {
paint.setColor(Color.DKGRAY);
floatx = ((graphwidth / hors) * i) + horstart;
canvas.drawLine(x, height - border, x, border, paint);
paint.setTextAlign(Align.CENTER);
if (i==horlabels.length-1)
paint.setTextAlign(Align.RIGHT);
if (i==0)
paint.setTextAlign(Align.LEFT);
paint.setColor(Color.WHITE);
canvas.drawText(horlabels[i], x, height - 4, paint);
 }

paint.setTextAlign(Align.CENTER);
canvas.drawText(title, (graphwidth / 2) + horstart, border - 4, paint);

if (max != min) {
paint.setColor(Color.LTGRAY);
if (type == BAR) {
floatdatalength = values.length;
floatcolwidth = (width - (2 * border)) / datalength;
for (inti = 0; i < values.length; i++) {
floatval = values[i] - min;
floatrat = val / diff;
floath = graphheight * rat;
canvas.drawRect((i * colwidth) + horstart, (border - h) + graphheight, ((i * colwidth) + horstart) + (colwidth - 1), height - (border - 1), paint);
 }
 } else {
floatdatalength = values.length;
floatcolwidth = (width - (2 * border)) / datalength;
floathalfcol = colwidth / 2;
floatlasth = 0;
for (inti = 0; i < values.length; i++) {
floatval = values[i] - min;
floatrat = val / diff;
floath = graphheight * rat;
if (i > 0)
canvas.drawLine(((i - 1) * colwidth) + (horstart + 1) + halfcol, (border - lasth) + graphheight, (i * colwidth) + (horstart + 1) + halfcol, (border - h) + graphheight, paint);
lasth = h;
 }
 }
 }
	}

privatefloatgetMax() {
floatlargest = Integer.MIN_VALUE;
for (inti = 0; i < values.length; i++)
if (values[i] > largest)
largest = values[i];
returnlargest;
	}

privatefloatgetMin() {
floatsmallest = Integer.MAX_VALUE;
for (inti = 0; i < values.length; i++)
if (values[i] < smallest)
smallest = values[i];
returnsmallest;
	}

}