自定义柱状图

在网上查了好多还是没有找到自己想要的。但是找到了一个比较相近的。初来乍到，第一次写博客。好紧张

先附上资料
这里写链接内容
我是根据他写的自己改造的，还请博主谅解。

先看效果

直接上代码吧：

public class CustomBarChartView extends View {    private String COLOR = "";    private int hPerHeig;    private int relativeHeight;    public CustomBarChartView(Context context) {        super(context);        init(context, null);    }    public CustomBarChartView(Context context, AttributeSet attrs) {        super(context, attrs);        init(context, attrs);    }    //  坐标轴 轴线 画笔：    private Paint mlinePaint;    //  坐标轴水平内部 虚线画笔    private Paint mlinePaintDott;    //  绘制文本的画笔    private Paint titlePaint;    //  矩形画笔 柱状图的样式信息    private Paint recPaint;    /**     * 初始化     *     * @param context     * @param attrs     */    private void init(Context context, AttributeSet attrs) {        mlinePaint = new Paint();        mlinePaintDott = new Paint();        titlePaint = new Paint();        recPaint = new Paint();        mlinePaint.setColor(Color.DKGRAY);        mlinePaintDott.setColor(Color.LTGRAY);        titlePaint.setColor(Color.BLACK);    }    //矩形数据    private int[] rectDate;    //x轴数据    private String[] xTitles;    //y轴数据    private String[] yTitlesStrings;    //矩形蓝色的数据    private int[] rectBlueDate;    /**     * 更新矩形数据     *     * @param thisData     * @param color     */    public void updateRectData(int[] thisData, String color) {        rectDate = thisData;        COLOR = color;        this.postInvalidate();    }    /**     * 更新矩形数据     *     * @param thisDataBlue     */    public void updateBlueRectData(int[] thisDataBlue) {        rectBlueDate = thisDataBlue;        this.postInvalidate();    }    /**     * 更新x轴数据     *     * @param xTitle     */    public void updateXText(String[] xTitle) {        xTitles = xTitle;        this.postInvalidate();    }    /**     * 更新y轴数据     *     * @param yTitlesString     */    public void updateYText(String[] yTitlesString, int danwei) {        yTitlesStrings = yTitlesString;        relativeHeight = danwei;        this.postInvalidate();    }    /**     * 重写onDraw()方法     *     * @param canvas     */    @Override    protected void onDraw(Canvas canvas) {        super.onDraw(canvas);        int width = getMeasuredWidth();        // 1. 画线        canvas.drawLine(80, 5, 80, 320, mlinePaint);        canvas.drawLine(80, 320, width - 10, 320, mlinePaint);        // 2 绘制坐标内部的水平线   横向的        int leftHeight = 300;        int hPerHeight = leftHeight / 10;        mlinePaintDott.setTextAlign(Paint.Align.CENTER);        mlinePaintDott.setTextSize(25);        mlinePaintDott.setAntiAlias(true);        for (int i = 0; i < 11; i++) {            canvas.drawLine(80, leftHeight - (hPerHeight * i), width - 5, leftHeight - (hPerHeight * i), mlinePaintDott);        }        // 3,绘制坐标内部的水平线   竖直方向的的        for (int i = 0; i < 30; i++) {            canvas.drawLine(80 + (i + 1) * 20, 0, 80 + (i + 1) * 20, 320, mlinePaintDott);        }        // 3 绘制 Y 轴方向的数据        if (yTitlesStrings != null && yTitlesStrings.length > 0) {            Paint.FontMetrics metrics = titlePaint.getFontMetrics();            //相对高度            hPerHeig = leftHeight / (yTitlesStrings.length - 1);            int descent = (int) metrics.descent;            titlePaint.setTextAlign(Paint.Align.RIGHT);            titlePaint.setTextSize(20);            titlePaint.setAntiAlias(true);            for (int i = 0; i < yTitlesStrings.length; i++) {                canvas.drawText(yTitlesStrings[i], 70, 20 + i * hPerHeig + descent, titlePaint);            }        }        int step = 0;        // 4  绘制 X 轴方向数据        if (xTitles != null) {            int xAxisLength = width - 110;              int columCount = xTitles.length + 1;            step = xAxisLength / columCount;            for (int i = 0; i < columCount - 1; i++) {                canvas.drawText(xTitles[i], 110 + step * (i + 1), 360, titlePaint);            }        }        /**红色的*/        if (rectDate != null && rectDate.length > 0) {            int thisCount = rectDate.length;            for (int i = 0; i < thisCount; i++) {                  int value = rectDate[i];                int i1 = relativeHeight / hPerHeig;                int i2 = value / i1;                int top = leftHeight + 20 - i2;                if (COLOR == "RED") {                    recPaint.setColor(Color.RED);                }else {                    recPaint.setColor(Color.parseColor("#3299cc"));                }                Rect rect = new Rect();                rect.left = 100 + step * (i + 1) - 10;                rect.right = 100 + step * (i + 1) + 10;                L.i("top :" + top);                rect.top = top;                rect.bottom = 320;                canvas.drawRect(rect, recPaint);            }        }        /**蓝色的*/        if (rectBlueDate != null && rectBlueDate.length > 0) {            int thisCount = rectBlueDate.length;            for (int i = 0; i < thisCount; i++) {                int value = rectBlueDate[i];                int i1 = relativeHeight / hPerHeig;                int i2 = value / i1;                int top = leftHeight + 20 - i2;                recPaint.setColor(Color.parseColor("#3299cc"));                Rect rect = new Rect();                rect.left = 100 + step * (i + 1) - 40;                rect.right = 100 + step * (i + 1) - 20;                rect.top = top;                rect.bottom = 320;                canvas.drawRect(rect, recPaint);            }        }    }    public void updateAllDate() {        postInvalidate();    }}

因为我这个项目数据有些大，而且是可变的。所以X轴 和 Y轴的数据也是我代码计算好之后设置进来的。

如果你想要使用的话，可以直接在这个类里面写死X轴 和 Y轴的数据。也可以直接调用上面的四个update方法；