绘制直角坐标系
16lz
2021-01-26
public class DrawFragment extends Fragment { private SurfaceView drawView; private SurfaceHolder sfh; private Context mcontext; private UpdateBox preUpdateBox; private UpdateBox tmp_Box; private boolean draw = true; private int width = 0; private int height = 0; private int y_axis_n = 10; private int x_axis_n = 10; private float showTime = 30f; //最长30秒 private Bitmap Cache_Bitmp = null; private Bitmap Screen_Bitmap = null; private Canvas Cache_canvas; private static DrawFragment df; private static CreateBitmapThread cbt; private static DrawThread drawThread; public DrawFragment(){} public static DrawFragment newInstance() { if(df == null) { df = new DrawFragment(); } return df; } private class UpdateBox { private Double[] x; private Float[] y; private int rate; private int type; UpdateBox(Double[] x,Float[] y,int rate,int type) { this.x = x; this.y = y; this.rate = rate; this.type = type; } Double[] getX() {return x;} Float[] getY() {return y;} int getRate() {return rate;} int getType() {return type;} } @Override public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) { //设置布局文件 View view = inflater.inflate(R.layout.drawlayout, container, false); drawView = (SurfaceView) view.findViewById(R.id.drawView); //添加自定义手势监听（GestureListener） //http://blog.csdn.net/shion1986_0514/article/details/78325835 drawView.setOnTouchListener(new GestureListener(){ @Override public void Zoom(float x,float y) { x = (x-1)*0.1f + 1; float time = showTime / x; if(time > 30){ time = 30; } if(time < 1) { time = 1; } showTime = time; } }); sfh = drawView.getHolder(); sfh.addCallback(new SurfaceHolder.Callback() { @Override public void surfaceCreated(SurfaceHolder surfaceHolder) { if(cbt == null) { cbt = new CreateBitmapThread(); cbt.start(); } if(drawThread == null) { drawThread = new DrawThread(); drawThread.start(); } } @Override public void surfaceChanged(SurfaceHolder surfaceHolder, int i, int i1, int i2) { } @Override public void surfaceDestroyed(SurfaceHolder surfaceHolder) { } }); //获取窗口宽高 if(Build.VERSION.SDK_INT >= 16) { ViewTreeObserver vto = drawView.getViewTreeObserver(); vto.addOnGlobalLayoutListener(new ViewTreeObserver.OnGlobalLayoutListener() { @RequiresApi(api = Build.VERSION_CODES.JELLY_BEAN) @Override public void onGlobalLayout() { drawView.getViewTreeObserver().removeOnGlobalLayoutListener(this); width = drawView.getWidth(); height = drawView.getHeight(); } }); }else{ int w = View.MeasureSpec.makeMeasureSpec(0, View.MeasureSpec.UNSPECIFIED); int h = View.MeasureSpec.makeMeasureSpec(0, View.MeasureSpec.UNSPECIFIED); drawView.measure(w,h); height = drawView.getMeasuredHeight(); width = drawView.getMeasuredWidth(); } return view; } @Override public void onResume() { super.onResume(); } @Override public void onAttach(Context mcontext) { super.onAttach(mcontext); this.mcontext = mcontext; } //更新函数 public void Update(Double[] x,Float[] y,int rate,int type) { preUpdateBox = null; preUpdateBox = new UpdateBox(x, y, rate, type); tmp_Box = preUpdateBox; } private class DrawThread extends Thread { @Override public void run() { while(draw) { if(Screen_Bitmap != null) { Date d = new Date(); if(sfh != null) { Canvas canvas = sfh.lockCanvas(); if(canvas != null) { canvas.drawColor(Color.WHITE); Paint mpaint = new Paint(); canvas.drawBitmap(Screen_Bitmap, 0, 0, mpaint); sfh.unlockCanvasAndPost(canvas); } } long time = new Date().getTime() - d.getTime(); try { int stime = 50 - (int)time; if(stime > 0) { sleep(stime); } } catch (InterruptedException e) { e.printStackTrace(); } } } } } private class CreateBitmapThread extends Thread { @Override public void run() { Paint textpaint_Y = new Paint(); textpaint_Y.setTextSize(myTools.dip2px(mcontext,8)); textpaint_Y.setColor(Color.BLACK); textpaint_Y.setTextAlign(Paint.Align.RIGHT); Paint textpaint_X = new Paint(); textpaint_X.setTextSize(myTools.dip2px(mcontext,8)); textpaint_X.setColor(Color.BLACK); textpaint_X.setTextAlign(Paint.Align.CENTER); Paint Linepaint = new Paint(); Linepaint.setColor(Color.BLUE); Linepaint.setStyle(Paint.Style.STROKE); Linepaint.setStrokeWidth(2); //线的宽度 Paint AxesPaint = new Paint(); AxesPaint.setColor(Color.BLACK); AxesPaint.setStrokeWidth(2); //线的宽度 while(draw) { //获取到长宽 if (width > 0 && height > 0) { if(Cache_Bitmp == null || Cache_canvas == null) { Cache_Bitmp = Bitmap.createBitmap(width, height, Bitmap.Config.ARGB_8888); Screen_Bitmap = Bitmap.createBitmap(width, height, Bitmap.Config.ARGB_8888); Cache_canvas = new Canvas(Cache_Bitmp); } Cache_canvas.drawColor(Color.WHITE); //绘制坐标系 int x_axis_width = width - 100 - 50; int y_axis_height = height - 100; //原点坐标 int x_axis_zero = 100; int y_axis_zero = y_axis_height + 50; int point_space_y = y_axis_height / y_axis_n; int point_space_x = x_axis_width / x_axis_n; //绘制X轴 Cache_canvas.drawLine(100f,y_axis_height+50,100+x_axis_width,y_axis_height+50,AxesPaint); //绘制Y轴 Cache_canvas.drawLine(100f,50f,100f,50+y_axis_height,AxesPaint); if(tmp_Box == null) { //填充Y轴坐标数据 float H = 10; float H_space = H / y_axis_n; float[] y_axis_labels = new float[y_axis_n + 1]; for(int i = 0;i <= y_axis_n;i++) { y_axis_labels[i] = 0 + H_space * i; DecimalFormat df = new DecimalFormat(".00"); Cache_canvas.drawLine(100f,y_axis_zero - point_space_y * i,97f,y_axis_zero - point_space_y * i,AxesPaint); Cache_canvas.drawText(df.format(y_axis_labels[i]),95f,y_axis_zero - point_space_y * i,textpaint_Y); } //填充X轴坐标数据 Cache_canvas.drawLine(100f,y_axis_height+50,100f,y_axis_height+54,AxesPaint); AddCacheToScreen(); try { sleep(200); } catch (InterruptedException e) { e.printStackTrace(); } continue; } Double[] x_array = tmp_Box.getX(); Float[] y_array = tmp_Box.getY(); //计算Y轴数据的上下限 float y_axis_max = y_array[0]; float y_axis_min = y_array[0]; for(int m = 1;mif(y_axis_max < y_array[m]){y_axis_max = y_array[m];} if(y_axis_min > y_array[m]){y_axis_min = y_array[m];} } if(y_axis_max == y_axis_min) { y_axis_max = y_axis_max + 1; y_axis_min = y_axis_min - 1; } y_axis_max = y_axis_max + (y_axis_max - y_axis_min) / 2; y_axis_min = y_axis_min - (y_axis_max - y_axis_min) / 2; //填充Y轴坐标数据 float H = y_axis_max - y_axis_min; float H_space = H / y_axis_n; float[] y_axis_labels = new float[y_axis_n + 1]; for(int i = 0;i <= y_axis_n;i++) { y_axis_labels[i] = y_axis_min + H_space * i; DecimalFormat df = new DecimalFormat("0.00"); Cache_canvas.drawLine(100f,y_axis_zero - point_space_y * i,97f,y_axis_zero - point_space_y * i,AxesPaint); Cache_canvas.drawText(df.format(y_axis_labels[i]),95f,y_axis_zero - point_space_y * i,textpaint_Y); } //填充X轴坐标数据 double X_axis_start = x_array[0]; double X_axis_end = X_axis_start + showTime * 1000; double X_axis_space = (X_axis_end - X_axis_start) / 10; double[] x_axis_labels = new double[x_axis_n + 1]; for(int i = 0;i <= x_axis_n;i++) { x_axis_labels[i] = X_axis_start + i * X_axis_space; String s = timeToStr(x_axis_labels[i]); Cache_canvas.drawLine(100f,y_axis_height+50,100f,y_axis_height+54,AxesPaint); Cache_canvas.drawText(s,100f + point_space_x * i ,y_axis_height+50+25,textpaint_X); } //填充数据到坐标系 float _y = y_axis_max - y_axis_min; float y_res = y_axis_height / _y; double _x = X_axis_end - X_axis_start; float x_res = (float)(x_axis_width / _x); int i = 0; int x_num = x_array.length; Path path = new Path(); while(i < x_num) { double x = x_array[i]; float y = y_array[i]; float p_x = x_axis_zero + ((float)(x - X_axis_start) * x_res); float p_y = y_axis_zero - (y - y_axis_min) * y_res; if(i == 0) { path.moveTo(p_x,p_y); }else{ path.lineTo(p_x,p_y); } i++; } Cache_canvas.drawPath(path,Linepaint); AddCacheToScreen(); } try { sleep(15); } catch (InterruptedException e) { e.printStackTrace(); } } } } private void AddCacheToScreen() { int bytes = Cache_Bitmp.getByteCount(); ByteBuffer buf = ByteBuffer.allocate(bytes); Cache_Bitmp.copyPixelsToBuffer(buf); byte[] byteArray = buf.array(); Screen_Bitmap.copyPixelsFromBuffer(ByteBuffer.wrap(byteArray)); } private String timeToStr(double t) { SimpleDateFormat sdf = new SimpleDateFormat("HH:mm:ss:SSS"); return sdf.format(new Date((long)t)); } public void close() { if(draw) { draw = false; cbt = null; drawThread = null; df = null; } }} 更多相关文章
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