本篇文章为大家展示了怎么在Android中自定义view实现车载可调整轨迹线，内容简明扼要并且容易理解，绝对能使你眼前一亮，通过这篇文章的详细介绍希望你能有所收获。
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/**
*
*/
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;
}
@Override
protected 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;ipoint[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;ilimt-radiu*2.0f){
y = limt-radiu*2.0f;
}
}
if(type == TYPE_MAX){
float limt2 = getMaxPoint(point);
if(y"+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);
}
@Override
public void onClick(View v) {
}
} 上述内容就是怎么在Android中自定义view实现车载可调整轨迹线，你们学到知识或技能了吗？如果还想学到更多技能或者丰富自己的知识储备，欢迎关注创新互联行业资讯频道。
