andriod散点图简单实现

来源：互联网发布：淘宝网下载安装2017 编辑：程序博客网时间：2024/05/17 04:15
效果图：
代码实现：
import android.content.Context;import android.graphics.Canvas;import android.graphics.Color;import android.graphics.Paint;import android.view.View;import java.util.List;public class ScatterView extends View {    private int axisColor;// 轴线颜色    private float axisWith;     // 轴线宽度    private int[] dotColor; // 数据点颜色    private int[] dotWidth;    // 数据点大小    private int textColor;      // 文本颜色    private int textSize;      // 文本字体    private int leftMargins;    // 左边距    private int rightMargins;  // 右边距    private int bottomMargins;  // 下边距    private int topMargins;    // 上边距    private float XScale;       // X的刻度长度    private int xLength;        // X轴的长度    private int xMax;           // X轴最大值    private int YScale;         // Y的刻度长度    private int yLength;        // Y轴的长度    private int yMax;           // Y轴最大值    private List<int[]> yData;  // y轴数据    private List<int[]> xData;// x轴数据    private boolean hasYAxis;  // 显示Y轴轴线    private boolean hasXAxis;  // 显示X轴轴线    private boolean hasYScale;  // 显示Y轴刻度    private boolean hasXScale;  // 显示X轴刻度    private boolean showData;// 显示数据值    private Paint axisPaint, textPaint, dotPaint;    private int[] colors = new int[]{Color.BLUE, Color.CYAN, Color.RED, Color.GREEN, Color.YELLOW};    private int[] dotType = new int[]{ 1, 2 };  // 数据点类型    //构造函数    public ScatterView(Context context, List<int []> yData, List<int []> xData){        super(context);        setData(yData, xData);        setDotColor(colors);    }    protected void onDraw(Canvas canvas) {        super.onDraw(canvas);        canvas.drawColor(Color.WHITE);        if (null!= yData  && null!= xData) {            init();            initPaint();            axisDraw(canvas);            Draw(canvas);        }    }    //绘制散点图    private void Draw(Canvas canvas){        int len = yData.size();        for (int j = 0; j < len; j++){            int []y = yData.get(j);            int []x = xData.get(j);            dotPaint.setColor(getDotColor()[j]);            if ( j % 2 == 0)                dotPaint.setStyle(Paint.Style.FILL);            else                dotPaint.setStyle(Paint.Style.STROKE);            for (int i = 0; i < y.length; i ++) {                canvas.drawCircle(XCoord(x[i]), YCoord(y[i]), 5, dotPaint);            }        }    }    //绘制坐标系    private void axisDraw(Canvas canvas){        if (isHasYAxis()) {            canvas.drawLine(leftMargins, topMargins + yLength,                    leftMargins,topMargins, axisPaint);        }        if (isHasXAxis()) {            canvas.drawLine(leftMargins, topMargins + yLength,                    xLength + leftMargins, topMargins + yLength, axisPaint);        }        for (int i = 0; i <= 5; i ++){            if (i < 5)                canvas.drawLine(leftMargins - 5, i * yLength / 5f + topMargins,                        xLength + leftMargins, i * yLength / 5f + topMargins, axisPaint);            canvas.drawText(String.valueOf(yMax * (5 - i ) / 5), leftMargins - 20,                    i * yLength / 5f + topMargins + 5, textPaint);        }        for (int i = 0; i <= 3; i ++){            if (i > 0)                canvas.drawLine(leftMargins +  i * xLength / 3f, topMargins,                        leftMargins + i * xLength / 3f, topMargins + yLength +5, axisPaint);            canvas.drawText(String.valueOf(xMax * i / 3), leftMargins + i * xLength / 3f,                    topMargins + yLength + 25, textPaint);        }    }    private void init(){        //初始化绘图范围        setLeftMargins(50);        setRightMargins(50);        setTopMargins(50);        setBottomMargins(50);        yLength = getHeight() - bottomMargins - topMargins;        xLength = getWidth() - leftMargins - rightMargins;        xMax = getMax(xData);        yMax = getMax(yData);        //初始化轴显示        setHasXAxis(true);        setHasYAxis(true);        setHasXScale(true);        setHasYData(true);        //初始化轴线画笔        axisPaint = new Paint();        axisPaint.setStyle(Paint.Style.STROKE);        axisPaint.setAntiAlias(true);        axisPaint.setColor(Color.GRAY);        axisPaint.setStrokeWidth(1);        //初始化数据点画笔        dotPaint = new Paint();        dotPaint.setStyle(Paint.Style.STROKE);        dotPaint.setAntiAlias(true);        dotPaint.setColor(Color.BLACK);        //初始化文本画笔        textPaint = new Paint();        textPaint.setStyle(Paint.Style.STROKE);        textPaint.setAntiAlias(true);        textPaint.setColor(Color.BLACK);        textPaint.setTextSize(11);        textPaint.setTextAlign(Paint.Align.RIGHT);    }    //设置画笔    private void initPaint() {        if (getAxisColor() != 0)            axisPaint.setColor(getAxisColor());        if (getAxisWidth() != 0)            axisPaint.setStrokeWidth(getAxisWidth());        if (getTextColor() != 0)            textPaint.setColor(getTextColor());        if (getTextSize() != 0)            textPaint.setTextSize(getTextSize());    }    //定位    private int YCoord(int y){        return (int) (yLength + topMargins - y * (yLength / (float) yMax));    }    private int XCoord(int x){        return (int) (leftMargins + x * (xLength / (float) xMax));    }    //获取图例最大值    private int getMax(List<int []> data){        int max = 0;        for (int j = 0; j< data.size(); j++)        {            int id = 0;            int[] temp = data.get(j);            for (int i = 1; i < temp.length; i++){                if (temp[i] > temp[id])                    id = i;            }            if (temp [id] > max)                max = temp[id];        }        int i=0;        while (max > 10){            max /= 10;            i ++;        }        return (int) ((max + 1) * Math.pow(10, i));    }    //数据设置    public int getYData(int i, int j) {        return yData.get(i)[j];    }    public int getXData(int i, int j) {        return xData.get(i)[j];    }    public void setData(List<int[]> yData,List<int[]> xData) {        this.yData = yData;        this.xData = xData;    }    //轴线设置    public int getAxisColor() {        return axisColor;    }    public void setAxisolor(int axisColor) {        this.axisColor = axisColor;    }    public float getAxisWidth() {        return axisWith;    }    public void setAxisWidth(int axisWith) {        this.axisWith = axisWith;    }    //数据点设置    public void setDotColor(int[] dotColor) {        this.dotColor = dotColor;    }    public int[] getDotColor() {        return dotColor;    }    public void setDotStyle(int i) {        switch (dotColor[i]){            case 1: dotPaint.setStyle(Paint.Style.FILL);                break;            case 2: dotPaint.setStyle(Paint.Style.STROKE);                break;        }    }    //X轴设置    public boolean isHasXAxis() {        return hasXAxis;    }    public void setHasXAxis(boolean hasXAxis) {        this.hasXAxis = hasXAxis;    }    public float getXScale() {        return XScale;    }    public void setXScale(float xScale) {        XScale = xScale;    }    public int getXLength() {        return xLength;    }    public void setXLength(int xLength) {        this.xLength = xLength;    }    public boolean isHasXScale() {        return hasXScale;    }    public void setHasXScale(boolean hasXScale) {        this.hasXScale = hasXScale;    }    //Y轴设置    public boolean isHasYAxis() {        return hasYAxis;    }    public void setHasYAxis(boolean hasYAxis) {        this.hasYAxis = hasYAxis;    }    public int getYScale() {        return YScale;    }    public void setYScale(int yScale) {        YScale = yScale;    }    public int getYLength() {        return yLength;    }    public void setYLength(int yLength) {        this.yLength = yLength;    }    public boolean isHasYScale() {        return hasYScale;    }    public void setHasYData(boolean hasYScale) {        this.hasYScale = hasYScale;    }    //文本设置    public int getTextSize() {        return textSize;    }    public void setTextSize(int textSize) {        this.textSize = textSize;    }    public int getTextColor() {        return textColor;    }    public void setTextColor(int textColor) {        this.textColor = textColor;    }    //边距设置    public int getLeftMargins() {        return leftMargins;    }    public void setLeftMargins(int leftMargins) {        this.leftMargins = leftMargins;    }    public int getRightMargins() {        return rightMargins;    }    public void setRightMargins(int rightMargins) {        this.rightMargins = rightMargins;    }    public int getBottomMargins() {        return bottomMargins;    }    public void setBottomMargins(int buttomMargins) {        this.bottomMargins = buttomMargins;    }    public int getTopMargins() {        return topMargins;    }    public void setTopMargins(int topMargins) {        this.topMargins = topMargins;    }}
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