Android自定义View——心电图，曲线图，波形图_android charview 绘心电图-优快云博客

本文链接：https://blog.youkuaiyun.com/jiujiaopanduola/article/details/103042552

公司要求做个心电图，昨天就写了下，原谅我懒得弄视频了，看图：

点击开始开始绘制，绘制屏满后，曲线向左移，点击停止则停止绘制。

首先自定义View，WaveShowView,重写其onLayout，onDraw方法，注释写的很清楚了：

public class WaveShowView extends View {

    private float mWidth = 0,mHeight = 0;//自身大小
    private int mBackGroundColor = Color.BLACK;
    private Paint mLinePaint;//画笔
    private Paint mWavePaint;//心电图的折现
    private Path mPath;//心电图的路径

    private ArrayList refreshList = new ArrayList();//后加的数据点
    private int row;//背景网格的行数和列数

    //心电
    private float MAX_VALUE = 20;
    private float WAVE_LINE_STROKE_WIDTH = 2;
    private int mWaveLineColor = Color.parseColor("#EE4000");//波形颜色
    private  float nowX,nowY;//目前的xy坐标

    //网格
    private final int GRID_SMALL_WIDTH = 10;//每一个网格的宽度和高度,包括线
    private final int GRID_BIG_WIDTH = 50;//每一个大网格的宽度和高度,包括线
    private int xSmallNum,ySmallNum,xBigNum,yBigNum;//小网格的横格，竖格，大网格的横格&#