自定义view 圆柱

package com.example.cll.zidingyiview;import android.content.Context;import android.graphics.Canvas;import android.graphics.Color;import android.graphics.Paint;import android.graphics.RectF;import android.support.annotation.Nullable;import android.util.AttributeSet;import android.view.View;import java.util.Arrays;import java.util.List;/** * Created by cll on 2017/12/20. */public class Zhuxing extends View{    private String[] xData={"星期日","星期一","星期二","星期三","星期四","星期五","星期六"};    private String[] yData={"100","200","300","400","500","600","700","800","900","1000"};    private List<Integer> list= Arrays.asList(300,200,460,120,730,920,80);    private int margin=20;    private int marginX=30;    private int marginY=30;    private int pointX;    private int pointY;    private int scaleX;    private int scaleY;    private Paint paintXY;    private Paint paintRect;    private Paint paintValue;    public Zhuxing(Context context) {        this(context,null);    }    public Zhuxing(Context context, @Nullable AttributeSet attrs) {        this(context, attrs,0);    }    public Zhuxing(Context context, @Nullable AttributeSet attrs, int defStyleAttr) {        super(context, attrs, defStyleAttr);    }    public void initView(String[] xData,String[] yData,List<Integer> list){        this.xData = xData;        this.yData = yData;        this.list = list;    }    private void init(){        pointX=margin+marginX;        pointY=getHeight()-(margin+marginY);        scaleX=(getWidth()-2*margin-marginX)/xData.length;        scaleY=(getHeight()-2*margin-marginY)/yData.length;        paintXY=new Paint();        paintXY.setStyle(Paint.Style.STROKE);        paintXY.setAntiAlias(true);        paintXY.setDither(true);        paintXY.setColor(Color.BLACK);        paintXY.setStrokeWidth(3);        paintRect=new Paint();        paintRect.setStyle(Paint.Style.STROKE);        paintRect.setDither(true);        paintRect.setAntiAlias(true);        paintRect.setColor(Color.BLACK);        paintRect.setTextSize(15);        paintValue=new Paint();        paintValue.setStyle(Paint.Style.FILL);        paintValue.setDither(true);        paintValue.setAntiAlias(true);        paintValue.setStrokeWidth(1);    }    @Override    protected void onDraw(Canvas canvas) {        init();        canvas.drawLine(pointX,pointY,getWidth()-margin,pointY,paintXY);        canvas.drawLine(pointX,pointY,pointX,margin,paintXY);        for (int i=1;i<xData.length;i++){              int height=pointY-margin;              float single = height / Integer.valueOf(yData[yData.length - 1]);              int marginLeft = pointX + scaleX * i;            // 单位            canvas.drawText(xData[i-1],marginLeft - 53,pointY+25,paintValue);            // 柱状图            RectF rectF = new RectF(marginLeft - 50,height - (list.get(i-1) * single),marginLeft - 10,pointY);            canvas.drawRect(rectF,paintRect);            canvas.drawText(list.get(i-1)+"",marginLeft - 43,height - (list.get(i-1) * single) - 10,paintValue);            canvas.drawText(xData[i-1],marginLeft-53,pointY+25,paintValue);        }        for (int i=1;i<yData.length;i++){            int marginTop = scaleY * i;            canvas.drawText(yData[i-1],pointX,pointY-marginTop,paintValue);        }    }}