Android studio实现滑动开关

package com.example.biansheng2;

import android.content.Context;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.Paint;
import android.graphics.RectF;
import android.graphics.Typeface;
import android.util.AttributeSet;
import android.view.MotionEvent;
import android.view.View;

import androidx.annotation.Nullable;

/**
 * 用于选择手动模式还是路线规划模式
 */
public class ModelSelectView extends View {
 Paint backPaint = new Paint();//背景画笔
 Paint facePaint = new Paint();//表面视图画笔
 Paint colorPaint1 = new Paint();//绘制红色和蓝色
 Paint colorPaint2 = new Paint();//绘制橙色
 Paint colorPaint3 = new Paint();//绘制灰色
 Paint handFont = new Paint();//手动控制模式字体
 Paint routeFont = new Paint();//路线规划模式字体

 boolean modelFlag = false;//false表示为手动控制模式,true表示为路线规划模式

 RectF mRectF1 = new RectF(150, 840, 580, 960);

 int x = 150, y = 900;//得到手指再控件上移动的坐标

 public ModelSelectView(Context context, @Nullable AttributeSet attrs) {
 super(context, attrs);
 }

 @Override
 protected void onDraw(Canvas canvas) {
 super.onDraw(canvas);
 paintInit();
 canvas.drawRect(mRectF1, backPaint);
 canvas.drawCircle(150, 900, 60, backPaint);
 canvas.drawCircle(580, 900, 60, backPaint);

 if (!modelFlag){
  canvas.drawCircle(150, 900, 60, facePaint);
  canvas.drawRect(150,840,x,960,facePaint);

  //设置手动控制字体可见
  handFont.setAlpha(255);
  //设置路线规划字体不可见
  routeFont.setAlpha(0);
 }else {
  canvas.drawCircle(580, 900, 60, facePaint);
  canvas.drawRect(x,840,580,960,facePaint);

  //设置手动控制字体不可见
  handFont.setAlpha(0);
  //设置路线规划字体可见
  routeFont.setAlpha(255);
 }

 canvas.drawText("手动控制",250,915,handFont);
 canvas.drawText("路线规划",250,915,routeFont);

 canvas.drawCircle(x, y, 44, backPaint);
 canvas.drawCircle(x, y, 40, colorPaint2);
 canvas.drawCircle(x, y, 47, colorPaint3);


 }


 private void paintInit() {
 if (!modelFlag) {
  backPaint.setAntiAlias(true);
  backPaint.setColor(Color.parseColor("#ff00b5eb"));

  facePaint.setColor(Color.parseColor("#D81B60"));
  facePaint.setAntiAlias(true);


 }else {
  backPaint.setAntiAlias(true);
  backPaint.setColor(Color.parseColor("#D81B60"));

  facePaint.setColor(Color.parseColor("#ff00b5eb"));
  facePaint.setAntiAlias(true);


 }


 colorPaint2.setAntiAlias(true);
 colorPaint2.setColor(Color.parseColor("#FF6407"));

 colorPaint1.setAntiAlias(true);
 colorPaint1.setColor(Color.BLUE);

 colorPaint3.setColor(Color.WHITE);
 colorPaint3.setAntiAlias(true);
 colorPaint3.setStyle(Paint.Style.STROKE);
 colorPaint3.setStrokeWidth(5);

 Typeface font = Typeface.create(Typeface.DEFAULT_BOLD,Typeface.BOLD_ITALIC);
 handFont.setTypeface(font);
 handFont.setColor(Color.WHITE);
 handFont.setAntiAlias(true);
 handFont.setTextSize(50);

 routeFont.setTypeface(font);
 routeFont.setColor(Color.WHITE);
 routeFont.setAntiAlias(true);
 routeFont.setTextSize(50);


 }

 @Override
 public boolean onTouchEvent(MotionEvent event) {
 switch (event.getAction()) {
  case MotionEvent.ACTION_DOWN:

  break;

  case MotionEvent.ACTION_MOVE:
  int getX = (int) event.getX();
  int getY = (int) event.getY();

  //判断得到的坐标是否在视图范围之内
  if (getX >= 150 && getX <= 580 && getY >= 840 && getY <= 960) {
   x = getX;
   y = 900;
  }

  break;
  case MotionEvent.ACTION_UP:
   int getX1 = (int) event.getX();
   int getY1 = (int) event.getY();
   //判断是否在控件内
   if (getY1 >= 810 && getY1 <= 990) {
    if (getX1 <= 280) {
    x = 150;
    modelFlag = false;
    } else if (getX1 >= 443) {
    x = 580;
    modelFlag = true;
    } else {
    if (!modelFlag) {
     x = 150;
     modelFlag = false;
    } else {
     x = 580;
     modelFlag = true;
    }
    }
   }
   break;
 }
 invalidate();//刷新界面
 return true;
 }
}