COPD.rar_539613.com3_android_android 源码_netty客户端_自定义折线图显示传感器实时数据

package com.swj.copd.view; import android.content.Context; import android.graphics.Canvas; import android.graphics.Color; import android.graphics.DashPathEffect; import android.graphics.Paint; import android.graphics.Path; import android.graphics.PorterDuff; import android.graphics.PorterDuffXfermode; import android.graphics.Rect; import android.graphics.RectF; import android.util.AttributeSet; import android.util.Log; import android.view.GestureDetector; import android.view.MotionEvent; import android.view.View; import androidx.annotation.Nullable; import java.util.ArrayList; import java.util.List; public class LineView extends View { private static final String TAG = "LineView"; // private int[] yLables = {1, 6, 11, 16, 21,1, 6, 11, 16, 21,1}; //固定y轴数字 private Context mContext; private List<String> xValues = new ArrayList<>(); private List<Float> yValues = new ArrayList<>(); private List<String> yLables = new ArrayList<>(); private int mWidth; private int mHeight; private int originX; // 原点x坐标 private int originY; // 原点y坐标 private int intervalX = 130; // 坐标刻度的间隔 private int intervalY = 80; // y轴刻度的间隔 private int paddingTop = 140;// 默认上下左右的padding private int paddingLeft = dip2px(80); private int paddingRight = dip2px(30); private int paddingBottom = 150; private int firstPointX; //第一个点x坐标 private int xScaleHeight = dip2px(6); // x轴刻度线高度 private int xyTextSize = sp2px(10); //xy轴文字大小 private int textToXYAxisGap = dip2px(10); // xy轴的文字距xy线的距离 private int lableCountY; // Y轴刻度个数 private int leftRightExtra = intervalX / 3; //x轴左右向外延伸的长度 private float minValueY = 1; // y轴最小值 private float maxValueY = 26; // y轴最大值 private int bigCircleR = 7; //折线图中的圆圈 private int smallCircleR = 5; //折线图中为了避免折线穿透的圆圈 private GestureDetector gestureDetector; //滑动手势 private int firstMinX; // 移动时第一个点的最小x值 private int firstMaxX; //移动时第一个点的最大x值 private int backGroundColor = Color.parseColor("#272727"); // view的背景颜色 private Paint paintWhite, paintBlue, paintRed, paintBack, paintText, dashPaint; private void initPaint() { paintWhite = new Paint(Paint.ANTI_ALIAS_FLAG); paintWhite.setColor(Color.WHITE); paintWhite.setStyle(Paint.Style.STROKE); paintBlue = new Paint(Paint.ANTI_ALIAS_FLAG); paintBlue.setColor(Color.parseColor("#0198cd")); paintBlue.setStrokeWidth(3f); paintBlue.setStyle(Paint.Style.STROKE); paintBack = new Paint(Paint.ANTI_ALIAS_FLAG); paintBack.setColor(Color.parseColor("#272727")); paintBack.setStyle(Paint.Style.FILL); paintRed = new Paint(Paint.ANTI_ALIAS_FLAG); paintRed.setColor(Color.RED); paintRed.setStrokeWidth(3f); paintRed.setStyle(Paint.Style.STROKE); paintText = new Paint(Paint.ANTI_ALIAS_FLAG); paintText.setColor(Color.WHITE); paintText.setTextSize(xyTextSize); paintText.setStrokeWidth(2f); dashPaint = new Paint(Paint.ANTI_ALIAS_FLAG); dashPaint.setColor(Color.WHITE); dashPaint.setStyle(Paint.Style.STROKE); dashPaint.setStrokeWidth(1f); } public LineView(Context context) { this(context, null); } public LineView(Context context, @Nullable AttributeSet attrs) { this(context, attrs, 0); } public LineView(Context context, @Nullable AttributeSet attrs, int defStyleAttr) { super(context, attrs, defStyleAttr); mContext = context; initPaint(); gestureDetector = new GestureDetector(context, new MyOnGestureListener()); } @Override protected void onLayout(boolean changed, int left, int top, int right, int bottom) { if (changed) { mWidth = getWidth(); mHeight = getHeight(); originX = paddingLeft - leftRightExtra; originY = mHeight - paddingBottom; firstPointX = paddingLeft; firstMinX = mWidth - originX - (xValues.size() - 1) * intervalX - leftRightExtra; // 滑动时，第一个点x值最大为paddingLeft，在大于这个值就不能滑动了 firstMaxX = firstPointX; setBackgroundColor(backGroundColor); } super.onLayout(changed, left, top, right, bottom); } @Override protected void onDraw(Canvas canvas) { drawX(canvas); if(yLables.size() != 0 && yValues.size() != 0) drawLine(canvas); drawY(canvas); } @Override protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) { setMeasuredDimension(getDefaultSize(getSuggestedMinimumWidth(), widthMeasureSpec),measureHeight(heightMeasureSpec)); } private int measureHeight(int measureSpec) { int result = 0; int specMode = MeasureSpec.getMode(measureSpec); int specSize = MeasureSpec.getSize(measureSpec); if(specMode == MeasureSpec.EXACTLY) { result = specSize; } else { result = yLables.size()*100+100; if(specMode == MeasureSpec.AT_MOST) { result = Math.min(result,specSize); Log.e(TAG, "measureHeight: "+result ); } } return result; } private void drawX(Canvas canvas) { Path path = new Path(); path.moveTo(originX,originY); // x 轴线 path.lineTo(mWidth - paddingRight,originY); canvas.drawPath(path, paintWhite); // x轴箭头 canvas.drawLine(mWidth - paddingRight, originY, mWidth - paddingRight - 15, originY + 10, paintWhite); canvas.drawLine(mWidth - paddingRight, originY, mWidth - paddingRight - 15, originY - 10, paintWhite); for (int i = 0; i < xValues.size(); i++) { // x轴线上的刻度线 canvas.drawLine(firstPointX + i * intervalX, originY, firstPointX + i * intervalX, originY - xScaleHeight, paintWhite); // x轴上的文字 canvas.drawText(xValues.get(i), firstPointX + i * intervalX - getTextWidth(paintText, "17.01") / 2, originY + dip2px(20), paintText); } // x轴虚线 Path path1 = new Path(); DashPathEffect dash = new DashPathEffect(new float[]{8, 10, 8, 10}, 0); dashPaint.setPathEffect(dash); for (int i = 0; i < lableCountY; i++) { path1.moveTo(originX, mHeight - paddingBottom - leftRightExtra - i * intervalY); path1.lineTo(mWidth - paddingRight, mHeight - paddingBottom - leftRightExtra - i * intervalY); } canvas.drawPath(path1, dashPaint); } /** * 画y轴 * * @param canvas */ private void drawY(Canvas canvas) { // canvas.save(); Path path = new Path(); path.moveTo(originX, originY); for (int i = 0; i < lableCountY; i++) { // y轴线 path.lineTo(originX, mHeight - paddingBottom - leftRightExtra - i * intervalY); } canvas.drawPath(path, paintWhite); //y轴最后一个刻度的位置 int lastPointY = mHeight - paddingBottom - leftRightExtra - (lableCountY - 1) * intervalY; // 箭头位置，y轴最后一个点后，需要额外加上一小段，就是一个半leftRightExtra的长度 int lastY = lastPointY - leftRightExtra - leftRightExtra / 2; // y轴箭头