使用Android自定义view完成车载可调整轨迹线

同事做的view，拿过来做个记录。


/*** */
package com.text.myviewdemo.view;import org.apache.http.conn.routing.RouteInfo.LayerType;import android.content.Context;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.DashPathEffect;
import android.graphics.Paint;
import android.graphics.PorterDuff;
import android.graphics.PorterDuffXfermode;
import android.graphics.Xfermode;
import android.graphics.PorterDuff.Mode;
import android.util.AttributeSet;
import android.util.Log;
import android.view.MotionEvent;
import android.view.View;/*** @author chenhanrong**/
public class CCView extends View implements android.view.View.OnClickListener{private Paint paint;private float[] line_r,line_l,line_1,line_2,line_3,line_t;
//  private float line1YL,line1YR,line2YL,line2YR,line3YL,line3YR;public Context context;private float radiu;private boolean showPoint = false;private boolean cmP1=false;private boolean cmP2=false;private boolean cmP3=false;private boolean cmP4=false;private boolean cmP5=false;private boolean cmP6=false;private boolean cmP7=false;private boolean cmP8=false;private boolean cmP9=false;private boolean cmP10=false;private boolean isfirst = true;private boolean isMove = false;public final static int D_LEFT =0;public final static int D_RIGHT =1;public final static int TYPE_MIN =0;public final static int TYPE_MAX =1;public CCView(Context context) {this(context,null);}public CCView(Context context, AttributeSet attrs) {this(context,attrs,0);}public CCView(Context context, AttributeSet attrs, int defStyleAttr) {super(context, attrs, defStyleAttr);this.context = context;init();}/*** 初始化控件*/private void init() {paint = new Paint();/*去锯齿*/paint.setAntiAlias(true);/*设置paint的颜色*/paint.setColor(Color.RED);/*设置paint的 style*/paint.setStyle(Paint.Style.FILL);/*设置paint的外框宽度*/paint.setStrokeWidth(10);setOnClickListener(this);setOnTouchListener(new OnTouchListener() {  @Override  public boolean onTouch(View v, MotionEvent event) {  return false;  }  });setLayerType(LAYER_TYPE_HARDWARE, paint);radiu = 20f;}@Overrideprotected void onDraw(Canvas canvas) {super.onDraw(canvas);canvas.drawColor(0x00000000, PorterDuff.Mode.CLEAR);
//      paint.setXfermode(new PorterDuffXfermode(PorterDuff.Mode.DST_OVER));if(isfirst){line_l = new float[]{getWidth()/4,getHeight()/4,getWidth()/8,getHeight()};line_r = new float[]{3*getWidth()/4, getHeight()/4,7*getWidth()/8, getHeight()};line_1 = new float[]{getPointX(line_l, line_l[1]*2f),line_l[1]*2f,getPointX(line_r, line_r[1]*2f), line_r[1]*2f};line_2 = new float[]{getPointX(line_l, line_l[1]*2.5f), line_l[1]*2.5f, getPointX(line_r, line_r[1]*2.5f), line_r[1]*2.5f};line_3 = new float[]{getPointX(line_l, line_l[1]*3f), line_l[1]*3f, getPointX(line_r, line_r[1]*3f), line_r[1]*3f};isfirst = false;}int canvasWidth = canvas.getWidth();int canvasHeight = canvas.getHeight();int layerId = canvas.saveLayer(0, 0, canvasWidth, canvasHeight, null, Canvas.ALL_SAVE_FLAG);
//      paint.setXfermode(new PorterDuffXfermode(Mode.DST_OVER));line_t = new float[]{getPointX(line_l, line_l[1]), line_l[1], getPointX(line_r, line_r[1]), line_r[1]};if(showPoint){ //四条横线  canvas.drawLines(line_t, paint);paint.setPathEffect(new DashPathEffect(new float[] {20, 5}, 0));    canvas.drawLines(line_1, paint);paint.setColor(Color.GREEN);canvas.drawLines(line_2, paint);paint.setColor(Color.YELLOW);canvas.drawLines(line_3, paint);paint.setColor(Color.RED);paint.setPathEffect(null);//左右两边线canvas.drawLines(line_l, paint);    canvas.drawLines(line_r,  paint);//中间三条横线交点canvas.drawCircle(line_1[0], line_1[1],radiu, paint);canvas.drawCircle(line_1[2], line_1[3],radiu, paint);paint.setColor(Color.GREEN);canvas.drawCircle(line_2[0], line_2[1],radiu, paint);canvas.drawCircle(line_2[2], line_2[3],radiu, paint);paint.setColor(Color.YELLOW);canvas.drawCircle(line_3[0], line_3[1],radiu, paint);canvas.drawCircle(line_3[2], line_3[3],radiu, paint);paint.setColor(Color.RED);//左右四点canvas.drawCircle(line_l[0], line_l[1],radiu, paint);canvas.drawCircle(line_l[2], line_l[3],radiu, paint);canvas.drawCircle(line_r[0], line_r[1],radiu, paint);canvas.drawCircle(line_r[2], line_r[3],radiu, paint);}else{float lf=getDashLineLength(D_LEFT);float rf=getDashLineLength(D_RIGHT);canvas.drawLines(line_t, paint);paint.setPathEffect(new DashPathEffect(new float[] {20, 5}, 0));canvas.drawLine(line_1[0],line_1[1],lf,getPointY(line_1, lf), paint);canvas.drawLine(rf,getPointY(line_1, rf),line_1[2],line_1[3], paint);paint.setColor(Color.GREEN); canvas.drawLine(line_2[0],line_2[1],lf,getPointY(line_2, lf), paint);canvas.drawLine(rf,getPointY(line_2, rf),line_2[2],line_2[3], paint);paint.setColor(Color.YELLOW);canvas.drawLine(line_3[0],line_3[1],lf,getPointY(line_3, lf), paint);canvas.drawLine(rf,getPointY(line_3, rf),line_3[2],line_3[3], paint);paint.setPathEffect(null);paint.setColor(Color.RED);//左右两边线canvas.drawLines(line_l, paint);    canvas.drawLines(line_r,  paint);canvas.drawCircle(line_l[0], line_l[1],paint.getStrokeWidth()/2, paint);canvas.drawCircle(line_r[0], line_r[1],paint.getStrokeWidth()/2, paint);}
//      paint.setStyle(Paint.Style.STROKE);paint.setColor(Color.RED);paint.setPathEffect(null);paint.setXfermode(null);canvas.restoreToCount(layerId);}/*** 获取坐标x* @param line 直线坐标系* @param y y点* @return*/private float getPointX(float[] line,float y){float x = 0;
//      Log.d("chr", "line====>"+line.length+":::y====>"+y);float x1 = line[0];float y1 = line[1];float x2 = line[2];float y2 = line[3];x = ((y-y1)/(y2-y1))*(x2-x1)+x1;return x;}/*** 获取坐标y* @param line:直线坐标系* @param x:x点* @return*/private float getPointY(float[] line,float x){float y = 0;
//      Log.d("chr", "line====>"+line.length+":::y====>"+y);float x1 = line[0];float y1 = line[1];float x2 = line[2];float y2 = line[3];y = ((x-x1)/(x2-x1))*(y2-y1)+y1;return y;}/*** 获取点应该移动到的Y坐标* @param line:线段坐标* @param y:滑动时的y坐标* @return*/private float getMoveY(float[] line,float y){if(y<=line[1]+ radiu){y=line[1]+radiu*2.0f;   } if(y>=line[3]-radiu*2.0f){y=line[3]-radiu*2.0f;          }return y;}/*** * @param direction 获取虚线长度* @return*/private float getDashLineLength(int direction){float length = 0;int a = 20;switch (direction) {case D_LEFT:length = line_t[0]+(line_t[2]-line_t[0])/a;break;case D_RIGHT:length = line_t[0]+(a-1)*(line_t[2]-line_t[0])/a;break;}return length;}/*** 获取最小值* @return*/private float getMinPoint(float point[]){float min = point[0];for(int i=0;i<point.length;i++){if(min>point[i]){min=point[i];}}return min;}/*** 获取最大值* @return*/private float getMaxPoint(float point[]){float max = point[0];for(int i=0;i<point.length;i++){if(max<point[i]){max=point[i];}}return max;}/*** 获取y轴限制点* @param point* @param y* @param type* @return*/private float getLimtMoveY(float point[],float y,int type){if(type == TYPE_MIN){float limt = getMinPoint(point);if(y>limt-radiu*2.0f){y = limt-radiu*2.0f;}}if(type == TYPE_MAX){float limt2 = getMaxPoint(point);if(y<limt2+radiu*2.0f){y = limt2+radiu*2.0f;}}return y;}public void proofView(int direction){switch (direction) {case D_LEFT:line_1[3] = line_1[1];line_1[2] = getPointX(line_r, line_1[1]);line_2[3] = line_2[1];line_2[2] = getPointX(line_r, line_2[1]);line_3[3] = line_3[1];line_3[2] = getPointX(line_r, line_3[1]);break;case D_RIGHT:line_1[1] = line_1[3];line_1[0] = getPointX(line_l, line_1[3]);line_2[1] = line_2[3];line_2[0] = getPointX(line_l, line_2[3]);line_3[1] = line_3[3];line_3[0] = getPointX(line_l, line_3[3]);break;}invalidate();}@Overridepublic boolean onTouchEvent(MotionEvent event) {// TODO Auto-generated method stubfloat x =event.getX();float y =event.getY();switch (event.getAction()) {case MotionEvent.ACTION_DOWN:if(showPoint){    isMove = false;Log.d("chr", "MotionEvent.ACTION_DOWN::x====>"+x+"::::y===>"+y);if(x<=(line_l[0]+radiu*2.0f) && x>=(line_l[0]-radiu*2.0f)&& y>=(line_l[1]-radiu*2.0f)&&y<=(line_l[1]+radiu*2.0f)){cmP1 = true;}else if(x<=(line_r[0]+radiu*2.0f) && x>=(line_r[0]-radiu*2.0f)&& y>=(line_r[1]-radiu*2.0f)&&y<=(line_r[1]+radiu*2.0f)){cmP2 = true;}else if(x<=(line_l[2]+radiu*2.0f )&& x>=(line_l[2]-radiu*2.0f)&& y>=(line_l[3]-radiu*2.0f)&&y<=(line_l[3]+radiu*2.0f)){cmP3 = true;}else if(x<=(line_r[2]+radiu*2.0f )&& x>=(line_r[2]-radiu*2.0f)&& y>=(line_r[3]-radiu*2.0f)&&y<=(line_r[3]+radiu*2.0f)){cmP4 = true;}else if(x<=(line_1[0]+radiu*2.0f )&& x>=(line_1[0]-radiu*2.0f)&& y>=(line_1[1]-radiu*2.0f)&&y<=(line_1[1]+radiu*2.0f)){cmP5 = true;}else if(x<=(line_1[2]+radiu*2.0f )&& x>=(line_1[2]-radiu*2.0f)&& y>=(line_1[3]-radiu*2.0f)&&y<=(line_1[3]+radiu*2.0f)){cmP6 = true;}else if(x<=(line_2[0]+radiu*2.0f )&& x>=(line_2[0]-radiu*2.0f)&& y>=(line_2[1]-radiu*2.0f)&&y<=(line_2[1]+radiu*2.0f)){cmP7 = true;}else if(x<=(line_2[2]+radiu*2.0f)&& x>=(line_2[2]-radiu*2.0f)&& y>=(line_2[3]-radiu*2.0f)&&y<=(line_2[3]+radiu*2.0f)){cmP8 = true;}else if(x<=(line_3[0]+radiu *2.0f)&& x>=(line_3[0]-radiu*2.0f)&& y>=(line_3[1]-radiu*2.0f)&&y<=(line_3[1]+radiu*2.0f)){cmP9 = true;}else if(x<=(line_3[2]+radiu*2.0f )&& x>=(line_3[2]-radiu*2.0f)&& y>=(line_3[3]-radiu*2.0f)&&y<=(line_3[3]+radiu*2.0f)){cmP10 = true;}}break;case MotionEvent.ACTION_MOVE:float[] point_L = new float[]{line_1[1],line_2[1],line_3[1]};float[] point_R = new float[]{line_1[3],line_2[3],line_3[3]};if(cmP1){isMove = true;line_l[0] =x;line_l[1] =getLimtMoveY(point_L, y, TYPE_MIN);line_1[0]= getPointX(line_l,line_1[1]);line_2[0]= getPointX(line_l,line_2[1]);line_3[0]= getPointX(line_l,line_3[1]);}else if(cmP2){isMove = true;line_r[0] = x;line_r[1] = getLimtMoveY(point_R, y, TYPE_MIN);line_1[2]= getPointX(line_r,line_1[3]);line_2[2]= getPointX(line_r,line_2[3]);line_3[2]= getPointX(line_r,line_3[3]);}else if(cmP3){isMove = true;line_l[2] =x;line_l[3] =getLimtMoveY(point_L, y, TYPE_MAX);line_1[0]= getPointX(line_l,line_1[1]);line_2[0]= getPointX(line_l,line_2[1]);line_3[0]= getPointX(line_l,line_3[1]);}else if(cmP4){isMove = true;line_r[2] = x;line_r[3] = getLimtMoveY(point_R, y, TYPE_MAX);line_1[2]= getPointX(line_r,line_1[3]);line_2[2]= getPointX(line_r,line_2[3]);line_3[2]= getPointX(line_r,line_3[3]);}else if(cmP5){isMove = true;y=getMoveY(line_l,y);line_1[0]= getPointX(line_l, y);line_1[1]= y;}else if(cmP6){isMove = true;y=getMoveY(line_r,y);line_1[2]= getPointX(line_r, y);line_1[3]= y;}else if(cmP7){isMove = true;y=getMoveY(line_l,y);line_2[0]= getPointX(line_l, y);line_2[1]= y;}else if(cmP8){isMove = true;y=getMoveY(line_r,y);line_2[2]= getPointX(line_r, y);line_2[3]= y;}else if(cmP9){isMove = true;y=getMoveY(line_l,y);line_3[0]= getPointX(line_l, y);line_3[1]= y;}else if(cmP10){isMove = true;y=getMoveY(line_r,y);line_3[2]= getPointX(line_r, y);line_3[3]= y;}   invalidate();   break;case MotionEvent.ACTION_UP:cmP1= false;cmP2= false;cmP3= false;cmP4= false;cmP5= false;cmP6= false;cmP7= false;cmP8= false;cmP9= false;cmP10= false;if(!isMove)showPoint = !showPoint;invalidate();break;}return super.onTouchEvent(event);}@Overridepublic void onClick(View v) {}}

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