AndroidStudio通过蓝牙连接绘制实时温度图

package com.cqut.fib123.searisebttest; import java.util.ArrayList; import java.util.HashMap; import java.util.Iterator; import java.util.Map; import java.util.Set; import android.annotation.SuppressLint; import android.content.Context; import android.graphics.Canvas; import android.graphics.Color; import android.graphics.Paint; import android.graphics.Path; import android.graphics.Point; import android.graphics.RectF; import android.graphics.Paint.Style; import android.graphics.Typeface; import android.util.AttributeSet; import android.view.MotionEvent; import android.view.View; /** * * * */ @SuppressLint("ViewConstructor") class MyChartView extends View{ public static final int RECT_SIZE = 10; private Point mSelectedPoint; public double num; public double morenum=0; //枚举实现坐标桌面的样式风栿 public static enum Mstyle { Line,Curve } private Mstyle mstyle=Mstyle.Line; // private Point[] mPoints = new Point[100]; Point[] mPoints = new Point[100]; Context context; int bheight=0; HashMap<Double, Double> map; ArrayList<Double> dlk; int totalvalue=30; int pjvalue=5; String xstr,ystr="";//横纵坐标的属怿 int margint=15; int marginb=40; int c=0; int resid=0; Boolean isylineshow; /** * @param map 霿要的数据，虽然key是double，但是只用于排序和显示，与横向距离无兿 * @param totalvalue Y轴的朿大忿 * @param pjvalue Y平均倿 * @param xstr X轴的单位 * @param ystr Y轴的单位 * @param isylineshow 是否显示纵向网格 * @ return */ public void SetTuView(HashMap<Double, Double> map,int totalvalue,int pjvalue,String xstr,String ystr,Boolean isylineshow) { this.map=map; this.totalvalue=totalvalue; this.pjvalue=pjvalue; this.xstr=xstr; this.ystr=ystr; this.isylineshow=isylineshow; } public MyChartView(Context ct) { super(ct); this.context=ct; } public MyChartView(Context ct, AttributeSet attrs) { super( ct, attrs ); this.context=ct; } public MyChartView(Context ct, AttributeSet attrs, int defStyle) { super( ct, attrs, defStyle ); this.context=ct; } @SuppressLint("DrawAllocation") @Override protected void onDraw(Canvas canvas) { super.onDraw(canvas); if(c!=0) this.setbg(c); if(resid!=0) this.setBackgroundResource(resid); dlk=getintfrommap(map); int height=getHeight(); if(bheight==0) bheight=height-marginb; int width=getWidth(); int blwidh=dip2px(context,50); int pjsize=totalvalue/pjvalue;//界面布局的尺寸的比例 // set up paint Paint paint = new Paint(Paint.ANTI_ALIAS_FLAG); paint.setColor(Color.BLACK); paint.setStrokeWidth(1); paint.setStyle(Style.STROKE); for(int i=0;i<pjsize+1;i++)//将顶点的线变为红色的 警戒线 { if(i==pjsize) paint.setColor(Color.BLACK); canvas.drawLine(blwidh,bheight-(bheight/pjsize)*i+margint,width,bheight-(bheight/pjsize)*i+margint, paint);//Y坐标 drawline(pjvalue*i+ystr, blwidh/2, bheight-(bheight/pjsize)*i+margint, canvas); } // ArrayList<Integer> xlist=new ArrayList<Integer>();//记录每个x的忿 ArrayList<Integer> xlist=new ArrayList<>();//记录每个x的忿 //画直线（纵向＿ paint.setColor(Color.BLACK); if(dlk==null) return; for(int i=0;i<7;i++) { xlist.add(blwidh+(width-blwidh)/7*i); if(isylineshow) { canvas.drawLine(blwidh+(width-blwidh)/7*i,margint,blwidh+(width-blwidh)/7*i,bheight+margint, paint); } num=i+morenum; drawline(num+xstr, blwidh+(width-blwidh)/7*i, bheight+40, canvas);//X坐标 } //点的操作设置 mPoints=getpoints(dlk, map, xlist, totalvalue, bheight); paint.setColor(Color.BLUE); paint.setStyle(Style.STROKE); paint.setStrokeWidth(0); drawline(mPoints, canvas, paint); paint.setColor(Color.RED); paint.setStyle(Style.FILL); for (int i=0; i<mPoints.length; i++) { canvas.drawRect(pointToRect(mPoints[i]),paint); } } @Override //触摸屿 public boolean onTouchEvent(MotionEvent event) { switch (event.getAction()) { case MotionEvent.ACTION_DOWN: for (int i=0; i<mPoints.length; i++) { if (pointToRect(mPoints[i]).contains(event.getX(),event.getY())) { System.out.println("-yes-"+i); mSelectedPoint = mPoints[i]; } } break; case MotionEvent.ACTION_MOVE: if ( null != mSelectedPoint) { // mSelectedPoint.x = (int) event.getX(); mSelectedPoint.y = (int) event.getY(); // invalidate(); } break; case MotionEvent.ACTION_UP: mSelectedPoint = null; break; default: break; } return true; } private RectF pointToRect(Point p) { return new RectF(p.x -RECT_SIZE/2, p.y - RECT_SIZE/2,p.x + RECT_SIZE/2, p.y + RECT_SIZE/2); } private void drawscrollline(Point[] ps,Canvas canvas,Paint paint) { Point startp=new Point(); Point endp=new Point(); for(int i=0;i<ps.length-1;i++) { startp=ps[i]; endp=ps[i+1]; int wt=(startp.x+endp.x)/2; Point p3=new Point(); Point p4=new Point(); p3.y=startp.y; p3.x=wt; p4.y=endp.y; p4.x=wt; Path path = new Path(); path.moveTo(startp.x,startp.y); path.cubicTo(p3.x, p3.y, p4.x, p4.y,endp.x, endp.y); canvas.drawPath(path, paint); } } private void drawline(Point[] ps,Canvas canvas,Paint paint) { Point startp=new Point(); Point endp=new Point(); for(int i=0;i<ps.length-1;i++) { startp=ps[i]; endp=ps[i+1]; canvas.drawLine(startp.x,startp.y,endp.x,endp.y, paint); } } private Point[] getpoints(ArrayList<Double> dlk,HashMap<Double, Double> map,ArrayList<Integer> xlist,int max,int h) { Point[] points=new Point[dlk.size()]; for(int i=0;i<dlk.size();i++) { int ph=h-(int)(h*(map.get(dlk.get(i))/max)); points[i]=new Point(xlist.get(i),ph+margint); } return points; } private void drawline(String text,int x,int y,Canvas canvas) { Paint p = new Paint(); p.setAlpha(0x0000ff); p.setTextSize(20); String familyName = "宋体"; Typeface font = Typeface.create(familyName,Typeface.ITALIC); p.setTypeface(font); p.setTextAlign(Paint.Align.CENTER); canvas.drawText(text, x, y, p); } public int dip2px(Context context, float dpValue) { final float scale = context.getResources().getDisplayMetrics().density; return (int) (dpValue * scale + 0.5f); } public int px2dip(Context context, float pxValue) { final float scale = context.getResources().getDisplayMetrics().density; return (int) (pxValue / scale + 0.5f); } @SuppressWarnings("rawtypes") public ArrayList<Double> getintfrommap(